CN101228057A

CN101228057A - Vehicle drive device controller

Info

Publication number: CN101228057A
Application number: CNA2006800264450A
Authority: CN
Inventors: 田端淳; 井上雄二; 镰田淳史
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2005-05-19
Filing date: 2006-05-19
Publication date: 2008-07-23
Anticipated expiration: 2026-05-19
Also published as: JP4274150B2; CN101228057B; JP2006321390A

Abstract

In a vehicle drive device comprising a differential mechanism and a motor provided therein, size of the drive device is reduced or its fuel consumption is improved while suppressing occurrence of speed change shock. Since an exchange clutch C0 or an exchange brake B0 is provided, a speed change mechanism (10) is switched between a stepless speed state and a stepped speed state so as to obtain a drive device having both advantages of fuel consumption improvement of a transmission having a speed change ratio electrically altered and high transmission efficiency of a gear type transmission for mechanically transmitting power. During speed change of an automatic speed change section (20) when a differential section (11) is in variable speed state, engaging pressure of an engaging device in the automatic speed change section (20) is controlled by an engaging pressure control means (84) so that the rotational speed N18 of a transmission member is varied to satisfy both quick speed change response on feeling and slow speed change response on speed change shock, thus suppressing occurrence of speed change shock.

Description

The control convenience that is used for vehicle driving apparatus

Technical field

The present invention relates to a kind of vehicle driving apparatus, more specifically, relate to a kind of technology that is used for miniaturized electric motivation etc. with box of tricks (its can work to carry out differential action) and electrical motor.

Background technology

Present known a kind of vehicle driving apparatus, it comprises: box of tricks, the output of the drive force source such as driving engine etc. is dispensed to first electrical motor and output block through this box of tricks; And be configured in second electrical motor between this output block and the drive wheel.For example patent documentation 1 discloses a kind of like this drive device for hybrid vehicle.This actuating device comprises box of tricks, and box of tricks is made of planetary gear unit (being gear cluster) and carries out differential action, will mechanically being passed to drive wheel from the main portion of the power of driving engine output.Remainder from the power of driving engine is passed to second electrical motor through electrical path from first electrical motor electricly.

Thereby the change-speed box work that actuating device can electrically change as speed ratio (being transmitting ratio) is for example as automatically controlled continuously variable automatic transmission.Actuating device is controlled by control convenience, makes vehicle move (promptly being driven) with the optimum Working of driving engine, thereby improves fuel efficiency (being the travelled distance of per unit fuel).

Patent documentation 1:JP-2003-301731A

Usually, toric transmission is considered to improve the device of vehicle fuel economy.So far, all devices that is considered to have high pass efficient if any the gear type torque transfer of level automatic transmission with hydraulic torque converter and so on.But the Poewr transmission mechanism with this advantageous combination does not also drop into practical.For example, disclosed drive device for hybrid vehicle comprises that being used for electric energy is passed to the electrical path of second electrical motor by it from first electrical motor in the above-mentioned patent documentation 1, that is, be used for the part of the vehicle drive force bang path as electrical energy transfer.Unavoidably, this makes the size of the electrical motor of winning increase along with the increase of driving engine output.In addition, utilize the size of second electrical motor that drives from the electric energy of first electrical motor output therefore to increase.Thereby some problems have appearred in the size increase along with actuating device.

Replacedly, the part of driving engine output is in case be passed to drive wheel after being converted into electric energy, and this can make fuel efficiency variation under the traveling state of vehicle such as running at high speed.Be under the situation of the toric transmission (its speed ratio can electrically change) that is used as what is called " automatically controlled CVT " in above-mentioned power splitting mechanism, similar problem can take place.

In addition, for patent documentation 1 disclosed drive device for hybrid vehicle, knownly in the output block of box of tricks (the stepless change part of electrical control) and the power transfer path between the drive wheel, be combined with change-speed box to satisfy the requirement that increases driving torque for the demand capacity that minimizes second electrical motor.For this vehicle driving apparatus, the output of drive force source is sent to drive wheel via two speed-changing mechanisms of this change-speed box of stepless change partial sum that comprises electrical control, allows actuating device to set up overall ratio based on speed-changing mechanism speed ratio separately simultaneously.

In this case, if change-speed box is carried out speed change, then cause the requirement of the control of carrying out the stepless change part along with this speed change.Be different from change-speed box and stepless change and partly be arranged to situation about controlling separately independently, this causes the possibility that the control of change-speed box and stepless change part complicates, the generation that causes speed change to be impacted.

An example as change-speed box, known comprise coupling device a grade automatic transmission with hydraulic torque converter (hereinafter being called " step change transmission ") arranged, described coupling device is used for optionally engaging many groups rotating element of compound planet gear, to switch to a plurality of gears such as the 4th D Drive, the 5th D Drive and the 6th D Drive etc. with selecting a property.For this step change transmission, the activating pressure Be Controlled of coupling device during speed change is impacted so that suppress speed change.Yet, during the step change transmission speed change activating pressure of coupling device need be in conjunction with the control of stepless change part Be Controlled, therefore, and carry out control by step change transmission independently and compare, the control of very possible change-speed box and stepless change part is complicated more, the generation that causes speed change to be impacted.

The present invention considers the problems referred to above and finishes, and its objective is provides a kind of control convenience that is used for vehicle driving apparatus, thereby having, described vehicle driving apparatus can work to carry out the box of tricks that differential action is dispensed to the output of driving engine first electrical motor and output shaft, and be configured in electrical motor in the power transfer path between this box of tricks and the drive wheel, described control convenience can be realized the miniaturization of actuating device or the raising of fuel efficiency, can suppress speed change simultaneously and impact.

Summary of the invention

In the described invention of claim 1, a kind of control convenience that is used for vehicle driving apparatus is provided,

(a) described vehicle driving apparatus has (i) driving engine; (ii) stepless change part, described stepless change partly comprises the box of tricks and second electrical motor and can be used as electric steplessly variable transmission work, described box of tricks is used for the output of described driving engine is dispensed to first electrical motor and transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (iii) variable part, described variable part form the part of described power transfer path and carry out speed change by making coupling device (being coupling device) engage (i.e. coupling) or discharging (promptly throwing off),

Described control convenience comprises: (b) differential state switching device, described differential state switching device is configured in the described box of tricks and can works so that described stepless change part is optionally switched to stepless change state and non-stepless change state, described stepless change state makes it possible to carry out electric controlling stepless variable speed work, and described non-stepless change state makes can not carry out described electric controlling stepless variable speed work; (c) activating pressure control setup or activating pressure control part, partly be placed at described stepless change under the situation of described stepless change state, described activating pressure control setup or activating pressure control part are controlled the activating pressure of described coupling device, realize given variation with the rotating speed that allows described transferring elements during the speed change of described variable part.

According to this structure, it can be the step change state in order to stepless change state and the feasible non-stepless change state that can not carry out electric controlling stepless variable speed work of carrying out electric controlling stepless variable speed work that the differential state switching device allows the stepless change part of vehicle driving apparatus optionally to switch to.This makes actuating device that the saving of fuel effect that provided by the change-speed box that speed ratio can electrically change can be provided and the advantageous combination of the high pass efficient that provided by the gear transmission device that propulsive effort is wherein mechanically transmitted.For example, vehicle with low/drive at moderate speed or with low/situation that middle output is travelled under in the common output area of driving engine, stepless change partly placed guaranteed under the stepless change state that vehicle has the fuel economy performance.

On the contrary, during high vehicle speeds, stepless change partly is placed under the non-stepless change state, is used to make driving engine output mainly to be delivered to drive wheel by the mechanical transfer path.This has suppressed the propulsive effort and the loss of the conversion efficiency between the electric energy that take place when electrically changing speed ratio when stepless change is partly worked, makes fuel efficiency improve.In addition, for example, stepless change partly is placed in non-stepless change state following time in the high output area at driving engine, makes change-speed box work electrically to change speed ratio at vehicle in the zone that low/middling speed and low/middle output is travelled.The maxim that this can reduce the electric energy that need be produced by electrical motor makes electrical motor or comprise the further miniaturization of vehicle driving apparatus of this electrical motor.

Comprise the stepless change vehicle driving apparatus partly that is configured to switch to stepless change state and non-stepless change state according to this, partly be placed at stepless change under the situation of stepless change state during the speed change of variable part, the activating pressure of activating pressure control setup control coupling device is realized given variation with the rotating speed that allows transferring elements.

This allows to realize given variable condition by the rotating speed of the well-determined transferring elements of speed ratio of the speed of a motor vehicle and variable part, and promptly given rate of change is to provide balance (trading off) between fast speed change response and slow speed change response.In fast speed change response, the rotating speed of transferring elements changes with bigger rate of change, for example to realize comfortable sensation.In slow speed change response, the rotating speed of transferring elements changes with less rate of change, impacts for example to be easy to suppressing speed change.Like this, suppressed the generation that speed change is impacted.

In the described invention of claim 2, a kind of control convenience that is used for vehicle driving apparatus is provided,

(a) described vehicle driving apparatus has (i) driving engine; (ii) stepless change part, described stepless change partly comprises the box of tricks and second electrical motor and can be used as electric steplessly variable transmission work, described box of tricks is used for the output of described driving engine is dispensed to first electrical motor and transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (iii) variable part, described variable part form the part of described power transfer path and carry out speed change by coupling device being engaged or discharging,

Described control convenience comprises: (b) differential state switching device, described differential state switching device is configured in the described box of tricks and can works so that described stepless change part is optionally switched to stepless change state and non-stepless change state, described stepless change state makes it possible to carry out electric controlling stepless variable speed work, and described non-stepless change state makes can not carry out described electric controlling stepless variable speed work; (c) activating pressure control setup or activating pressure control part, partly be placed at described stepless change under the situation of described non-stepless change state, described activating pressure control setup or activating pressure control part are controlled the activating pressure of described coupling device, realize given variation with the rotating speed of the described transferring elements of permission during the speed change of described variable part or the rotating speed of described driving engine.

According to this structure, the differential state switching device allows the stepless change part of vehicle driving apparatus optionally to switch to can be in order to the stepless change state of carrying out electric controlling stepless variable speed work and make the non-stepless change state step change state for example that can not carry out electric controlling stepless variable speed work.This makes actuating device that the saving of fuel effect that provided by the change-speed box that speed ratio can electrically change can be provided and the advantageous combination of the high pass efficient that provided by the gear transmission device that propulsive effort is wherein mechanically transmitted.For example, vehicle with low/drive at moderate speed or with low/situation that middle output is travelled under in the common output area of driving engine, stepless change partly placed guaranteed under the stepless change state that vehicle has the fuel economy performance.

Comprise the stepless change vehicle driving apparatus partly that is configured to switch to stepless change state and non-stepless change state according to this, partly be placed at stepless change under the situation of non-stepless change state during the speed change of variable part, the activating pressure of activating pressure control setup control coupling device is realized given variation with the rotating speed of permission transferring elements or the rotating speed of driving engine.

Like this, partly be placed at stepless change under the situation of non-stepless change state, the rotating speed of transferring elements (its speed ratio by the speed of a motor vehicle and variable part is unique to be determined) and the rotating speed of driving engine are realized given variable condition, be given rate of change, between fast speed change response and slow speed change response, to provide balance.In fast speed change response, the rotating speed of transferring elements or the rotating speed of driving engine change with bigger rate of change, for example to realize comfortable sensation.In slow speed change response, the rotating speed of transferring elements or the rotating speed of driving engine change with less rate of change, impact for example to be easy to suppressing speed change.Like this, suppressed the generation that speed change is impacted.

In the described invention of claim 3, a kind of control convenience that is used for vehicle driving apparatus is provided,

(a) described vehicle driving apparatus has (i) driving engine; (ii) differential part, described differential partly comprises the box of tricks and second electrical motor, described box of tricks is used for the output of described driving engine is dispensed to first electrical motor and transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (iii) variable part, described variable part form the part of described power transfer path and carry out speed change by coupling device being engaged or discharging,

Described control convenience comprises: (b) differential state switching device, described differential state switching device is configured in the described box of tricks and can works so that described differential part is optionally switched to differential state and non-differential state, described differential state makes it possible to carry out differential action, and described non-differential state makes can not carry out described differential action; (c) activating pressure control setup or activating pressure control part, partly be placed at described differential under the situation of described differential state, described activating pressure control setup or activating pressure control part are controlled the activating pressure of described coupling device, realize given variation with the rotating speed that allows described transferring elements during the speed change of described variable part.

According to this structure, the differential state switching device allows the differential part of vehicle driving apparatus optionally to switch to the differential state that can carry out differential action and makes the non-differential state (for example lock-out state) that can not carry out differential action.This makes actuating device that the saving of fuel effect that provided by the change-speed box that speed ratio can electrically change can be provided and the advantageous combination of the high pass efficient that provided by the gear transmission device that propulsive effort is wherein mechanically transmitted.For example, vehicle with low/drive at moderate speed or with low/situation that middle output is travelled under in the common output area of driving engine, differential partly placed guaranteed under the differential state that vehicle has fuel efficiency.

On the contrary, during high vehicle speeds, differential partly is placed under the non-differential state, is used to make driving engine output mainly to be delivered to drive wheel by the mechanical transfer path.This has suppressed the propulsive effort and the loss of the conversion efficiency between the electric energy that take place when electrically changing speed ratio when differential is partly worked, makes fuel efficiency improve.In addition, for example, differential partly is placed in non-differential state following time in the high output area at driving engine, makes change-speed box work electrically to change speed ratio at vehicle in the zone that low/middling speed and low/middle output is travelled.The maxim that this can reduce the electric energy that need be produced by electrical motor makes electrical motor or comprise the further miniaturization of vehicle driving apparatus of this electrical motor.

Comprise the differential vehicle driving apparatus partly that is configured to switch to differential state and non-differential state according to this, partly be placed at differential under the situation of differential state during the speed change of variable part, the activating pressure of activating pressure control setup control coupling device is realized given variation with the rotating speed that allows transferring elements.This allows to realize given variable condition by the rotating speed of the well-determined transferring elements of speed ratio of the speed of a motor vehicle and variable part, and promptly given rate of change is to provide balance between fast speed change response and slow speed change response.In fast speed change response, the rotating speed of transferring elements changes with bigger rate of change, for example to realize comfortable sensation.In slow speed change response, the rotating speed of transferring elements changes with less rate of change, impacts for example to be easy to suppressing speed change.Like this, suppressed the generation that speed change is impacted.

In the described invention of claim 4, a kind of control convenience that is used for vehicle driving apparatus is provided,

Described control convenience comprises: (b) differential state switching device, described differential state switching device is configured in the described box of tricks and can works so that described differential part is optionally switched to differential state and non-differential state, described differential state makes it possible to carry out differential action, and described non-differential state makes can not carry out described differential action; (c) activating pressure control setup or activating pressure control part, partly be placed at described differential under the situation of described non-differential state, described activating pressure control setup or activating pressure control part are controlled the activating pressure of described coupling device, realize given variation with the rotating speed of the described transferring elements of permission during the speed change of described variable part or the rotating speed of described driving engine.

Comprise the differential vehicle driving apparatus partly that is configured to switch to differential state and non-differential state according to this, partly be placed at differential under the situation of non-differential state during the speed change of variable part, the activating pressure of activating pressure control setup control coupling device is realized given variation with the rotating speed of permission transferring elements or the rotating speed of driving engine.

This allows to realize given variable condition by the rotating speed of the rotating speed of the well-determined transferring elements of speed ratio of the speed of a motor vehicle and variable part or driving engine, and promptly given rate of change is to provide balance between fast speed change response and slow speed change response.In fast speed change response, the rotating speed of transferring elements or the rotating speed of driving engine change with bigger rate of change, for example to realize comfortable sensation.In slow speed change response, the rotating speed of transferring elements or the rotating speed of driving engine change with less rate of change, impact for example to be easy to suppressing speed change.Like this, suppressed the generation that speed change is impacted.

Preferably, as described in claim 5, the control convenience that is used for vehicle driving apparatus also comprises control device of electric motor, and described control device of electric motor is used to make the rotation speed change of described first electrical motor, changes continuously before and after the speed change of described variable part with the rotating speed that allows described driving engine.

Preferably, as described in claim 6, be used for the control convenience of vehicle driving apparatus, described activating pressure control setup is learnt the activating pressure of described coupling device, realizes described given variation with the rotating speed that allows described transferring elements or the rotating speed of described driving engine.

Preferably, as described in claim 7, the control convenience that is used for vehicle driving apparatus also comprises rotating control assembly, described rotating control assembly uses described first electrical motor and/or described second electrical motor to make the rotation speed change of described transferring elements, realize given variation with the rotating speed that during the speed change of described variable part, allows described transferring elements, and be operated at described rotating control assembly under the situation of rotation speed change of described transferring elements, described activating pressure control setup is forbidden the activating pressure of described coupling device is learnt.

This has forbidden when rotating control assembly makes the rotation speed change of transferring elements the study based on the activating pressure of coupling device.This can suppress speed change and impact when rotating control assembly does not make the rotation speed change of transferring elements.

Preferably, as described in claim 8, the control convenience that is used for vehicle driving apparatus also comprises rotating control assembly, described rotating control assembly uses described first electrical motor and/or described second electrical motor to make the rotation speed change of described transferring elements, realize given variation with the rotating speed that during the speed change of described variable part, allows described transferring elements, and be operated at described rotating control assembly under the situation of rotation speed change of described transferring elements, described activating pressure control setup considers that the change in rotational speed of described transferring elements learns the activating pressure of described coupling device.

According to this control, impact the activating pressure of study coupling device on the basis that suppresses effect in the speed change that the rotation speed change (it is realized by rotating control assembly) that deducts by transferring elements is caused, can when rotating control assembly does not make the rotation speed change of transferring elements, suppress the generation of speed change impact thus.

In invention according to claim 9, a kind of control convenience that is used for vehicle driving apparatus is provided,

(a) described vehicle driving apparatus has (i) stepless change part, described stepless change partly comprises the box of tricks and second electrical motor and can be used as electric steplessly variable transmission work, described box of tricks is used for the output of driving engine is dispensed to first electrical motor and transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (ii) variable part, described variable part forms the part of described power transfer path,

(b) described control convenience comprises control device of electric motor or motor control part, during the speed change of described variable part, described control device of electric motor or motor control partly use described first electrical motor and/or described second electrical motor to make the rotation speed change of described transferring elements.

According to this structure, during the speed change of variable part, control device of electric motor uses first electrical motor and/or second electrical motor to make the rotation speed change of transferring elements.This allows to realize given rate of change by the rotating speed of the well-determined transferring elements of speed ratio of the speed of a motor vehicle and variable part, to provide balance between fast speed change response and slow speed change response.In fast speed change response, the rotating speed of transferring elements changes with bigger rate of change, for example to realize comfortable sensation.In slow speed change response, the rotating speed of transferring elements changes with less rate of change, impacts for example to be easy to suppressing speed change.In other words, make the rotating speed of transferring elements realize the given for example given rate of change of variable condition,, suppress the generation that speed change is impacted thus to provide compromise between impacting for example shortening the speed change time and suppress speed change.

Preferably, as described in claim 10, be used for the control convenience of vehicle driving apparatus, speed change is carried out by making to discharge the release of side engagement device or the engage side coupling device is engaged in described variable part, and described control convenience also comprises activating pressure control setup or activating pressure control part, during the speed change of described variable part, combine with the change in rotational speed of the described transferring elements that causes by described control device of electric motor, described activating pressure control setup or activating pressure control part are controlled the activating pressure of described release side engagement device and/or the activating pressure of described engage side coupling device, make the rotation speed change of described transferring elements thus.

According to this structure, control device of electric motor uses first electrical motor and/or second electrical motor to make the rotation speed change of transferring elements.In addition, the activating pressure of the release side engagement device relevant with the speed change of variable part and/or the activating pressure of engage side coupling device make the rotation speed change of transferring elements, for example to provide balance between shortening speed change time and the impact of inhibition speed change.Thus, realized further inhibition that speed change is impacted.

Preferably, as described in claim 11, be used for the control convenience of vehicle driving apparatus, described control device of electric motor allows the rotation speed change of described transferring elements to realize given rate of change.

Preferably, as described in claim 12, be used for the control convenience of vehicle driving apparatus, the rotating speed that described control device of electric motor is used to use described first electrical motor to prevent described transferring elements changes before and after the speed change of described variable part.Such structure allows to be changed continuously by the overall ratio that stepless change partial sum change-speed box is realized.Compare with the result who realizes under the situation that (just has level to change) so that the discontinuous variation of overall ratio in engine speed change, this can further suppress speed change and impacts,

In the described invention of claim 13, a kind of control convenience that is used for vehicle driving apparatus is provided,

Described control convenience comprises: (b) differential action restraint device, described differential action restraint device is configured in the described box of tricks and can works to limit the differential action of described box of tricks, limits the work of described stepless change part as electric steplessly variable transmission thus; (c) control device of electric motor or motor control part, when described differential action restraint device limit described stepless change part as the work of electric steplessly variable transmission when described stepless change partly being placed the non-stepless change state that interrupts electric controlling stepless variable speed work, described control device of electric motor or motor control part use described first electrical motor and/or described second electrical motor to make the rotation speed change of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

According to such structure, the differential action restraint device does not limit the differential action of box of tricks, thereby allows box of tricks to place the differential state that is used to activate differential action.This allows box of tricks to place the stepless change state, can carry out electric controlling stepless variable speed work.Replacedly, under the situation of the differential action of differential action restraint device restriction box of tricks, the work of electric steplessly variable transmission is restricted.

For example, be placed at box of tricks under the situation of non-stepless change state (being lock-out state), box of tricks is placed in the non-stepless change state (for example step change state) that can not carry out electric controlling stepless variable speed work that makes.This makes actuating device that the saving of fuel effect that provided by the change-speed box that speed ratio can electrically change can be provided and by the dual advantageous effects that is used for the high pass efficient that the gear transmission device of transmission of drive force mechanically provides.

For example, vehicle with low/drive at moderate speed or with low/situation that middle output is travelled under in the common output area of driving engine, stepless change partly placed guaranteed under the stepless change state that vehicle has the fuel economy performance.In addition, during high vehicle speeds, stepless change partly is placed under the non-stepless change state, and driving engine output mainly is delivered to drive wheel by the mechanical transfer path.This has suppressed the propulsive effort and the loss of the conversion efficiency between the electric energy that take place when electrically changing speed ratio when stepless change is partly worked, makes fuel efficiency improve.

In addition, stepless change partly is placed in non-stepless change state following time in the high output area at driving engine, makes variable part work electrically to change speed ratio at vehicle in the zone that low/middling speed and low/middle output is travelled.The maxim of this electric energy that can reduce to be produced by electrical motor (electric energy that need be transmitted by electrical motor just) makes electrical motor or comprise the further miniaturization of vehicle driving apparatus of this electrical motor.

In addition, have following possibility: differential action restraint device restriction stepless change part is as the work of electric steplessly variable transmission, so that stepless change partly places the non-stepless change state that can not carry out electric controlling stepless variable speed work.In this case, during the speed change of variable part, control device of electric motor uses first electrical motor and/or second electrical motor to make the rotation speed change of the rotating speed or the driving engine of transferring elements.

This allows to realize given rate of change by the rotating speed of well-determined transferring elements rotating speed of the speed ratio of the speed of a motor vehicle and variable part or driving engine, to provide balance between two kinds of speed change responses.A kind of speed change response comprises fast speed change response, and wherein the rate of change of transferring elements change in rotational speed rate and engine speed becomes bigger, to have comfortable sensation.Another kind of speed change response comprises slow speed change response, and wherein the rate of change of transferring elements change in rotational speed rate and engine speed becomes less, impacts for example to be easy to suppressing speed change.In other words, make the rotating speed of transferring elements or the rotating speed of driving engine realize given variable condition, for example given rate of change is for example to provide compromise between shortening speed change time and the impact of inhibition speed change.This has suppressed the generation that speed change is impacted.

Preferably, as described in claim 14, be used for the control convenience of vehicle driving apparatus, speed change is carried out by making to discharge the release of side engagement device or the engage side coupling device is engaged in described variable part, and

Described control convenience also comprises activating pressure control setup or activating pressure control part, during the speed change of described variable part, combine with the rotating speed of the described transferring elements that causes by described control device of electric motor or the change in rotational speed of described driving engine, described activating pressure control setup or activating pressure control part are controlled the activating pressure of described release side engagement device and/or the activating pressure of described engage side coupling device, make the rotation speed change of the rotating speed or the described driving engine of described transferring elements thus.

According to this structure, control device of electric motor uses first electrical motor and/or second electrical motor to make the rotation speed change of the rotating speed or the driving engine of transferring elements.In addition, the activating pressure of the release side engagement device relevant with the speed change of variable part and/or the activating pressure of engage side coupling device make the rotation speed change of the rotating speed or the driving engine of transferring elements, for example between shortening speed change time and the impact of inhibition speed change, to provide balance, thus, realized further inhibition that speed change is impacted.

Preferably, as described in claim 15, be used for the control convenience of vehicle driving apparatus, described control device of electric motor allows the rotation speed change of the rotating speed of described transferring elements or described driving engine to realize given rate of change.According to this structure, the rotating speed of transferring elements or the rotating speed of driving engine are realized given rate of change, for example to provide compromise between shortening speed change time and the impact of inhibition speed change, can suppress speed change thus and impact.

In the described invention of claim 16, a kind of control convenience that is used for vehicle driving apparatus is provided,

(a) described vehicle driving apparatus has (i) stepless change part, described stepless change partly comprises the box of tricks and second electrical motor and can work to be used as electric steplessly variable transmission, described box of tricks can be dispensed to the output of driving engine first electrical motor and the transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (ii) variable part, described variable part forms the part of described power transfer path,

Described control convenience comprises: (b) differential action restraint device, described differential action restraint device is configured in the described box of tricks and can works to limit the differential action of described box of tricks, limits the work of described stepless change part as described electric steplessly variable transmission thus; (c) control device of electric motor or motor control part, according to described differential action restraint device whether limit described stepless change part as the work of described electric steplessly variable transmission described stepless change is partly placed the non-stepless change state that can not carry out electric controlling stepless variable speed work that makes, described control device of electric motor or motor control part use described first electrical motor and/or described second electrical motor to change the change in rotational speed method of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

In addition, stepless change partly is placed in non-stepless change state following time in the high output area at driving engine, makes change-speed box work electrically to change speed ratio at vehicle in the zone that low/middling speed and low/middle output is travelled.The maxim of this electric energy that can reduce to be produced by electrical motor (electric energy that need be transmitted by electrical motor just) makes electrical motor or comprise the further miniaturization of vehicle driving apparatus of this electrical motor.

During the speed change of variable part, judge the differential action restraint device whether limit the stepless change part as the work of electronic controlled transmission stepless change is partly placed the non-stepless change state that can not carry out electric controlling stepless variable speed work that makes.

As the result of this judgement, control device of electric motor uses first electrical motor and/or second electrical motor to change the rotating speed of transferring elements or the changing method of engine speed.Two kinds of speed change state that take the variable part comprise: (1) stepless change state, wherein the rotating speed of driving engine is owing to electric controlling stepless variable speed work changes, and is not subjected to during the speed change of variable part the constraint by the well-determined transferring elements rotating speed of the speed ratio of the speed of a motor vehicle and variable part; (2) non-stepless change state is compared with the situation under being in the stepless change state, because the variation of engine speed during the speed change of variable part, it has the inertia of further increase.

Under two states, all use first electrical motor and/or second electrical motor to make the variable part speed change, thereby suppressed the generation that speed change is impacted.

In the described invention of claim 17, a kind of control convenience that is used for vehicle driving apparatus is provided,

Described control convenience comprises: (b) control device of electric motor or motor control part, according to being to carry out to make the overall ratio continually varying speed change that is realized by the described variable part of described stepless change partial sum or carry out the speed change that makes the discontinuous variation of described overall ratio, described control device of electric motor or motor control part use described first electrical motor and/or described second electrical motor to change the change in rotational speed method of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

Control device of electric motor changes the changing method of engine speed like this.There are two kinds of speed change patterns, comprise: first kind of speed change, wherein during the speed change of variable part, overall ratio changes continuously, makes it possible to suppress the variation of engine speed; With second kind of speed change, wherein during the speed change of variable part, the discontinuous variation of overall ratio causes engine speed change.In this case, the variable part uses first electrical motor and/or second electrical motor based on any speed change of carrying out in these two kinds of speed changes.In other words, according to the gear shift mode that is used to continuously change overall ratio (different inertia torques wherein takes place during the speed change of variable part) be used for the gear shift mode of discontinuous change overall ratio, the variable part uses first electrical motor and/or second electrical motor to carry out speed change.This has suppressed the generation that speed change is impacted.

In invention according to claim 18, a kind of control convenience that is used for vehicle driving apparatus is provided,

(a) described vehicle driving apparatus has (i) differential part, described differential partly comprises the box of tricks and second electrical motor, described box of tricks can be dispensed to the output of driving engine first electrical motor and the transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (ii) variable part, described variable part forms the part of described power transfer path,

Described control convenience comprises: (b) control device of electric motor or motor control part, during the speed change of described variable part, described control device of electric motor or motor control partly use described first electrical motor and/or described second electrical motor to make the rotation speed change of described transferring elements.

According to this structure, during the speed change of variable part, control device of electric motor uses first electrical motor and/or second electrical motor to make the rotation speed change of transferring elements.This allows to realize given rate of change by the rotating speed of the well-determined transferring elements of speed ratio of the speed of a motor vehicle and variable part, to provide balance between fast speed change response and slow speed change response.In fast speed change response, the rotating speed of transferring elements changes with bigger rate of change, for example to realize comfortable sensation.In slow speed change response, the rotating speed of transferring elements changes with less rate of change, impacts for example to be easy to suppressing speed change.

In other words, make the rotating speed of transferring elements realize the given for example given rate of change of variable condition,, suppress the generation that speed change is impacted thus to provide compromise between impacting for example shortening the speed change time and suppress speed change.

In invention according to claim 19, a kind of control convenience that is used for vehicle driving apparatus is provided,

Described control convenience comprises: (b) differential action restraint device, and described differential action restraint device is configured in the described box of tricks, is used for limiting by the differential action that limits described box of tricks the differential action of described differential part; (c) control device of electric motor or motor control part, the differential action that limits described differential part when described differential action restraint device is so that described differential when partly placing the non-differential state of not carrying out differential action, and described control device of electric motor or motor control part use described first electrical motor and/or described second electrical motor to make the rotation speed change of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

According to such structure, the differential action restraint device does not limit the differential action of box of tricks, thereby allows box of tricks to place the differential state that is used to activate differential action.Replacedly, under the situation of the differential action of differential action restraint device restriction box of tricks, the work of electric steplessly variable transmission is restricted.For example, be placed at box of tricks under the situation of non-stepless change state (for example lock-out state), box of tricks is placed in the non-stepless change state (for example step change state) that can not carry out electric controlling stepless variable speed work that makes.This makes actuating device that the saving of fuel effect that provided by the change-speed box that speed ratio can electrically change can be provided and by the dual advantageous effects that is used for the high pass efficient that the gear transmission device of transmission of drive force mechanically provides.

For example, vehicle with low/drive at moderate speed or with low/situation that middle output is travelled under in the common output area of driving engine, if differential partly is placed in the differential state, guaranteed that then vehicle has improved fuel economy performance.In addition, during high vehicle speeds, differential partly is placed under the non-differential state.In this case, the output of driving engine mainly is delivered to drive wheel by the mechanical power bang path.This has suppressed to make fuel efficiency improve in the propulsive effort and the loss of the conversion efficiency between the electric energy that make that variable part work takes place when electrically changing speed ratio.

In addition, differential partly is placed in non-differential state following time in the high output area at driving engine, makes variable part work electrically to change speed ratio at vehicle in the zone that low/middling speed and low/middle output is travelled.The maxim of this electric energy that can reduce to produce by electrical motor (electric energy that need transmit by electrical motor just).Make electrical motor or comprise the further miniaturization of vehicle driving apparatus of this electrical motor.

In addition, there is following possibility: the work of differential action restraint device restriction differential part, so that differential partly places the non-differential state that can not carry out differential action.In this case, during the speed change of variable part, control device of electric motor uses first electrical motor and/or second electrical motor to make the rotation speed change of the rotating speed or the driving engine of transferring elements.

This allows to realize given rate of change by the rotating speed of well-determined transferring elements rotating speed of the speed ratio of the speed of a motor vehicle and variable part and driving engine, to provide balance between fast speed change response and slow speed change response.In fast speed change response, the rotating speed of transferring elements or engine speed change with bigger rate of change, for example to realize comfortable sensation.In slow speed change response, the rotating speed of transferring elements or engine speed change with less rate of change, impact for example to be easy to suppressing speed change.

In other words, make the rotating speed of transferring elements or the rotating speed of driving engine realize given variable condition, for example given rate of change is for example to provide compromise between shortening speed change time and the impact of inhibition speed change.This has suppressed the generation that speed change is impacted.

In the described invention of claim 20, a kind of control convenience that is used for vehicle driving apparatus is provided,

(a) described vehicle driving apparatus has (i) differential part, described differential partly comprises the box of tricks and second electrical motor, described box of tricks can be dispensed to the output of driving engine first electrical motor, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (ii) variable part, described variable part forms the part of described power transfer path,

Described control convenience comprises: (b) differential action restraint device, and described differential action restraint device is configured in the described box of tricks, is used for limiting by the differential action that limits described box of tricks the differential action of described differential part; (c) control device of electric motor or motor control part, whether limit described differential differential action partly so that described differential partly places the non-differential state of not carrying out differential action based on described differential action restraint device, described control device of electric motor or motor control part use described first electrical motor and/or described second electrical motor to change the change in rotational speed method of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

According to such structure, the differential action restraint device does not limit the differential action of box of tricks, thereby allows box of tricks to place the differential state that is used to activate differential action.This allows box of tricks to place the differential state that can carry out differential action.Replacedly, under the situation of the differential action of differential action restraint device restriction box of tricks, the work of electric steplessly variable transmission is restricted.

For example, be placed at box of tricks under the situation of non-differential state (being lock-out state), differential partly is placed in the non-differential state (for example step change state) that can not carry out differential action that makes.This makes the actuating device variable part that the saving of fuel effect that provided by the change-speed box that speed ratio can electrically change can be provided and by the dual advantageous effects that is used for the high pass efficient that the gear transmission device of transmission of drive force mechanically provides.

During the speed change of variable part, control device of electric motor uses first electrical motor and/or second electrical motor to change the rotating speed of transferring elements or the changing method of engine speed.This change depends on the differential action whether the differential action restraint device has limited the differential part, thereby differential partly is placed in one do not carry out the non-differential state of differential action.The differential state that differential partly adopts comprises: (1) differential state, wherein engine speed is owing to electric controlling stepless variable speed work changes, no matter and during the speed change of variable part by the constraint of the rotating speed of the well-determined transferring elements of speed ratio of the speed of a motor vehicle and variable part; (2) non-differential state is compared with the situation under being in the differential state, because the variation of engine speed during the speed change of variable part, it has the inertia of further increase.Thus, under any one in these two kinds of patterns, the variable part uses first electrical motor and/or second electrical motor to carry out speed change.

In the described invention of claim 21, a kind of control convenience that is used for vehicle driving apparatus is provided,

Described control convenience comprises (b) control device of electric motor or motor control part, speed change based on described variable part makes the continuous variation of the overall ratio of being realized by the described variable part of described stepless change partial sum or makes the discontinuous variation of described overall ratio, and described control device of electric motor or motor control part use described first electrical motor and/or described second electrical motor to change the change in rotational speed method of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

Control device of electric motor changes the change in rotational speed method like this.There are two kinds of speed change patterns, comprise: first kind of speed change, wherein during the speed change of variable part, overall ratio changes continuously, makes it possible to suppress the variation of engine speed; With second kind of speed change, wherein during the speed change of variable part, the discontinuous variation of overall ratio causes engine speed change.Like this, the variable part uses first electrical motor and/or second electrical motor based on any speed change of carrying out in these two kinds of speed changes.In other words, according to the gear shift mode that is used to continuously change overall ratio (inertia torques of different sizes wherein take place during the speed change of variable part) be used for the gear shift mode of discontinuous change overall ratio, the variable part uses first electrical motor and/or second electrical motor to carry out speed change, has suppressed the speed change impact thus.

Preferably, the differential state that described differential state switching device makes described box of tricks be placed in can to carry out differential action, thus make described stepless change partly be placed in the stepless change state, make it possible to carry out electric controlling stepless variable speed work thus.On the contrary, it is lock-out state that described box of tricks is placed in the non-differential state that can not carry out differential action, thereby makes described stepless change partly be placed in for example step change state of non-stepless change state.Like this, the stepless change part can be placed in stepless change state or non-stepless change state.

Preferably, box of tricks be placed in by the differential state switching device differential state with the situation of carrying out differential action under, differential partly is placed in the differential state.Be placed in non-differential state for example under the situation of lock-out state at box of tricks, differential partly is placed in non-differential state.Like this, the differential part is switched between differential state and non-differential state.

Preferably, described variable part is that a grade automatic transmission with hydraulic torque converter is arranged.For a grade automatic transmission with hydraulic torque converter is arranged, during the speed change of variable part, the overall ratio that constitutes by the speed ratio of the speed ratio of stepless change part and variable part have level to change to change than overall ratio is continuous the time situation under rapider.Therefore, whole actuating device can be used as toric transmission so that driving torque changes reposefully, and can make speed ratio have level ground to change so that obtain driving torque rapidly.In addition, under the stepless change state of stepless change part, stepless change partial sum variable part constitutes toric transmission, and under the non-stepless change state of stepless change part, stepless change partial sum variable part constitutes step change transmission.

Preferably, described box of tricks comprises first element that is connected to driving engine, is connected to second element of first electrical motor and is connected to the three element of transferring elements.Described differential state switching device or differential restraint device can be with following a kind of pattern work: allow first relative to each other to rotate to three element, box of tricks is placed under the differential state, for example make at least second with three element with the rotation of different speed.Described differential state switching device or differential restraint device can be with following another kind of pattern work: allow at least second with three element with different speed rotations, for example allowing first to rotate in the mode of unanimity or make second element enter non-rotating state to three element, is lock-out state box of tricks is placed non-differential state.This layout provides the structure that is used for box of tricks is placed differential state or non-differential state.

Preferably, the release of power-transfer clutch and drg allows first of box of tricks relative to each other to rotate to three element, and this makes box of tricks be placed in the differential state and as automatically controlled differential gear.Making described clutch engagement allow box of tricks is 1 change-speed box as speed ratio.Replacedly, make described brake engages allow box of tricks to be lower than 1 speedup change-speed box as speed ratio.This allows box of tricks to have the structure that can be placed in differential state or non-differential state, has the structure of the change-speed box that has single gear or a plurality of gear fixed speed ratios simultaneously.

Preferably, described box of tricks is made of planetary gear apparatus.Described first element is the pinion carrier of described planetary gear apparatus, and described second element is the sun gear of described planetary gear apparatus, and the gear ring that described three element is described planetary gear apparatus.This allows the axial dimension of box of tricks to reduce.In addition, box of tricks can use a planetary gear apparatus to form with simple structure.

Preferably, described planetary gear apparatus is single pinion type planetary gear apparatus.By this structure, the axial dimension of box of tricks reduces, and can be made of simply single pinion type planetary gear apparatus.

More preferably, the overall ratio of described vehicle drive unit is set up based on the speed ratio of the speed ratio of described stepless change part and described variable part.According to this structure, utilize the speed ratio of variable part can on relative broad range, obtain propulsive effort.Replacedly, when work greater than 1 deceleration change-speed box as speed ratio in the variable part, second electrical motor produces the little output torque of torque than the output shaft of variable part.Thereby can reduce the size of second electrical motor.In addition, when stepless change partly was placed in the stepless change state, stepless change partial sum variable part constituted toric transmission, and when stepless change partly was placed in non-stepless change state, stepless change partial sum variable part constituted step change transmission.

More preferably, the overall ratio of described vehicle driving apparatus is set up based on the speed ratio of the speed ratio of described differential part and described variable part.According to this structure, utilize the speed ratio of variable part can on relative broad range, obtain vehicle drive force.Replacedly, when work greater than 1 deceleration change-speed box as speed ratio in the variable part, second electrical motor produces the little output torque of torque than the output shaft of variable part.Thereby can reduce the size of second electrical motor.In addition, when differential partly was placed in the differential state, differential partial sum variable part constituted toric transmission, and when differential partly was placed in non-differential state, differential partial sum variable part constituted step change transmission.

More preferably, described vehicle driving apparatus also comprises the differential action restraint device, and described differential action restraint device is combined in the described box of tricks, is used to limit the differential action of described box of tricks.This has limited stepless change partly as electric steplessly variable transmission.By this structure, when the differential action restraint device did not limit the differential action of box of tricks, allowing box of tricks to be placed in can be in order to carry out the differential state of differential action.This makes the stepless change part can be used as electric steplessly variable transmission.

Replacedly, described differential action restraint device can be worked to limit the differential action of described box of tricks, limits the work of box of tricks as electric steplessly variable transmission thus.Thereby, being placed in the disabled non-differential state of differential action for example during lock-out state at box of tricks, box of tricks can be placed in for example step change state of the disabled non-stepless change state of electric controlling stepless variable speed work.Thereby, actuating device the saving of fuel effect that provides by the variable part that speed ratio wherein can electrically change can be provided and the high conversion efficiency that provides by the gear transmission device that propulsive effort is wherein mechanically transmitted between balance.

For example, vehicle with low/drive at moderate speed and with low/during middle output is travelled,, guaranteed that then vehicle realizes the consumption of fuel of expectation if stepless change partly is placed in the stepless change state.In addition, during high vehicle speeds, if stepless change partly is placed in non-stepless change state, then driving engine output mainly is delivered to drive wheel by the mechanical power bang path.

This has suppressed the propulsive effort of generation when the change-speed box work that can electrically change as speed ratio and the conversion loss between the electric energy, makes it possible to reduce consumption of fuel.In addition, during the vehicle ' under the high output of driving engine, when stepless change partly is placed in non-stepless change state, vehicle with the zone that low/middling speed and low/middle output is travelled in, the stepless change part is as the change-speed box work that electrically changes speed ratio.The maxim of this electric energy that can reduce to produce by electrical motor (promptly need transmit electric energy) by electrical motor, the size that makes it possible to further reduce electrical motor He comprise the vehicle driving apparatus of this electrical motor.

More preferably, described vehicle driving apparatus also comprises the differential action restraint device, and described differential action restraint device is combined in the described box of tricks, is used to limit the differential action of described box of tricks, limits the differential action of described differential part thus.By this structure, the differential that is combined in the vehicle driving apparatus partly is placed in the differential state, thereby can work to carry out differential action, making that the differential action of box of tricks is not placed in by the restriction of differential action restraint device and box of tricks can be in order to carry out the differential state of differential action.

Replacedly, described differential action restraint device limits the differential action of described box of tricks, limits described differential action thus.This makes box of tricks be placed in for example lock-out state of the disabled non-differential state of differential action.Thereby box of tricks can be placed in for example lock-out state of the forbidden non-differential state of differential action.Thereby, actuating device the saving of fuel effect that provides by the variable part that speed ratio wherein can electrically change can be provided and the high conversion efficiency that provides by the gear transmission device that propulsive effort is wherein mechanically transmitted between in conjunction with advantage.

For example, vehicle with low/drive at moderate speed or with low/situation that middle output is travelled under in the common output area of driving engine, if differential partly is placed under the differential state, guaranteed that then vehicle has the saving of fuel performance of raising.In addition, during high vehicle speeds, if differential partly is placed under the non-differential state, then driving engine output mainly is delivered to drive wheel by the mechanical power bang path.This has suppressed to lose with propulsive effort and the conversion efficiency between the electric energy that the on period that electrically changes speed ratio takes place in variable part work, makes fuel efficiency improve.

In addition, in the high output area of driving engine during the vehicle ', when differential partly is placed in non-differential state following time, vehicle with the zone that low/middling speed and low/middle output is travelled in, it is as the change-speed box work that electrically changes speed ratio.This makes the maxim can reduce the electric energy that need be produced by electrical motor, promptly needs the maxim of the electric energy that transmits by electrical motor.This feasible size that can further reduce electrical motor or comprise the vehicle driving apparatus of this electrical motor.

More preferably, the overall ratio of described actuating device is set up based on the speed ratio of the speed ratio of described stepless change part and described variable part.In this case, utilize the speed ratio of variable part can on relative broad range, obtain propulsive effort.Replacedly, when the variable part comprised the deceleration change-speed box that has greater than the speed ratio of " 1 ", with respect to the torque of the output shaft of variable part, second electrical motor can provide less output torque.This feasible size that can reduce second electrical motor.And when stepless change partly was placed in the differential state, stepless change partial sum variable part constituted toric transmission, and when stepless change partly was placed in non-differential state, stepless change partial sum variable part constituted step change transmission.

More preferably, the overall ratio of described vehicle driving apparatus is set up based on the speed ratio of the speed ratio of described differential part and described variable part.In this case, utilize the speed ratio of variable part can on relative broad range, obtain propulsive effort.Replacedly, when the variable part comprised the deceleration change-speed box that has greater than the speed ratio of " 1 ", with respect to the torque of the output shaft of variable part, second electrical motor can provide less output torque.This feasible size that can reduce second electrical motor.And when differential partly was placed in the differential state, differential partial sum variable part constituted toric transmission, and when differential partly was placed in non-differential state, differential partial sum variable part constituted step change transmission.

Description of drawings

Fig. 1 is the skeleton diagram of the structure of explanation drive device for hybrid vehicle according to an embodiment of the invention.

The start of Fig. 2 is expressed and can and be used for relation between the start combination of fluid pressure type friction engagement device of this variable speed operation at the variable speed operation of the drive device for hybrid vehicle embodiment illustrated in fig. 1 of working under stepless change state or the step change state.

The alignment chart of Fig. 3 illustrates when drive device for hybrid vehicle embodiment illustrated in fig. 1 is worked under the step change state, the relative rotation speed of rotating element under each different gears.

Fig. 4 is the view that the input and output signal of electronic control package set in the actuating device embodiment illustrated in fig. 1 is described.

The functional block diagram of Fig. 5 illustrates the main portion of the Control work of being carried out by electronic control package shown in Figure 4.

The view of Fig. 6 illustrates the example of the drive force source switching figure of the example of switching figure of an example, pre-stored of the speed change figure of pre-stored and pre-stored, carrying out speed change based on described speed change figure in the automatic speed changing part judges, carry out the switching determination of speed change state based on described switching figure in speed-changing mechanism, described drive force source switching figure has and is used for the boundary line between driving engine operation area and motor operation area of switching between engine operation mode and the motor operational mode.These figure are plotted in the speed of a motor vehicle and output torque in the two-dimensional coordinate system as identical parameters, express corresponding relation simultaneously.

Fig. 7 is the view that specific consumption of fuel figure is shown, and wherein is shown in dotted line the optimum fuel rate curve of driving engine, and engine operation (dotted line) in the toric transmission and the difference between the engine operation (long and short dash line) in the step change transmission are shown.

The conceptual view of Fig. 8 illustrates to be had at stepless control area and the relation of the pre-stored of the boundary line between grade control area is arranged, and it is used for drawing the stepless control area shown in the dotted line of Fig. 7 and boundary line between grade control area is arranged.

The diagram of curves of Fig. 9 illustrates the engine speed fluctuation that is caused by upgrading of step change transmission.

The view of Figure 10 illustrates and is provided with shifter bar and is operated to select an example of one speed-changing operation device in the multiple shift position.

Figure 11 illustrates the example of hydraulic pressure learning value figure, and it is used for selecting being used in the activating pressure of coupling device of the speed change of automatic speed changing part.

The diagram of circuit of Figure 12 is used to illustrate the Control work of being carried out by electronic control package shown in Figure 5, that is, and and the variable speed control work of during the variable speed control of automatic speed changing part, partly carrying out by stepless change.

Figure 13 is the sequential chart of Control work shown in the diagram of circuit of explanation Figure 12, partly carries out " 2 grades → 3 grades " Control work when upgrading when automatic speed changing when it is illustrated in differential and partly is placed in the stepless change state.

Figure 14 is the sequential chart of Control work shown in the diagram of circuit of explanation Figure 12, partly carries out " 3 grades → 2 grades " Control work when lowering category when automatic speed changing when it is illustrated in differential and partly is placed in the stepless change state.

Figure 15 is the sequential chart of Control work shown in the diagram of circuit of explanation Figure 12, the Control work when it is illustrated in differential and partly is placed in the stepless change state when the automatic speed changing part is carried out the connection of " 3 grades → 2 grades " power and lowered category with the jump gear shift mode.

Figure 16 is the sequential chart of Control work shown in the diagram of circuit of explanation Figure 12, partly carries out " 2 grades → 3 grades " Control work when upgrading when automatic speed changing when it is illustrated in differential and partly is placed in step change state (lock-out state).

Figure 17 is the sequential chart of Control work shown in the diagram of circuit of explanation Figure 12, partly carries out " 3 grades → 2 grades " when automatic speed changing when it is illustrated in differential and partly is placed in step change state (lock-out state) and slides the Control work when lowering category.

The diagram of circuit of Figure 18 is used to illustrate the Control work of being carried out by electronic control package shown in Figure 5, that is, and and the Control work that the hydraulic pressure value of the coupling device in the speed change that is used in the automatic speed changing part is learnt.

The diagram of circuit of Figure 19 is used to illustrate the Control work of being carried out by electronic control package shown in Figure 5, that is, and and the Control work that the hydraulic pressure value of the coupling device in the speed change that is used in the automatic speed changing part is selected.

Figure 20 is the skeleton diagram that the structure of drive device for hybrid vehicle according to another embodiment of the invention is described.

Figure 21 is the start table corresponding to Fig. 2, and it illustrates and can and be used for relation between the start combination of fluid pressure type friction engagement device of this variable speed operation at the variable speed operation of the drive device for hybrid vehicle embodiment illustrated in fig. 20 of working under stepless change state or the step change state.

Figure 22 is the alignment chart corresponding to Fig. 3, and it illustrates when drive device for hybrid vehicle embodiment illustrated in fig. 20 is worked under the step change state, the relative rotation speed of rotating element under each different gears.

The view of Figure 23 illustrates the shifter of interactive switch form, and it is by the example of vehicle driver's operation with the manual selecting arrangement of speed change state of selection speed change state.

The functional block diagram of Figure 24 illustrates the main portion of the Control work of electronic control package shown in Figure 4 in another embodiment of the present invention.

The diagram of circuit of Figure 25 is used to illustrate the Control work of electronic control package embodiment illustrated in fig. 24, that is, and and the variable speed control work when automatic speed changing partly carries out Control work in the differential part.

The functional block diagram of Figure 26 illustrates the main portion of the Control work of electronic control package shown in Figure 4 in another embodiment.

The diagram of circuit of Figure 27 is used to illustrate the Control work of electronic control package shown in Figure 26, that is, and and the variable speed control work when automatic speed changing partly carries out Control work in the differential part.

Description of reference numerals

8: driving engine

10,70: speed-changing mechanism (actuating device)

11: differential part (stepless change part)

16: power splitting mechanism (box of tricks)

18: transferring elements

20,72: automatic speed changing part (variable part)

38: drive wheel

40: electronic control package (control convenience)

52: hybrid power control setup (control device of electric motor, rotating control assembly)

84,184: the activating pressure control setup

M1: first electrical motor

M2: second electrical motor

C0: switch clutch (differential state switching device, differential action restraint device)

B0: switch drg (differential state switching device, differential action restraint device)

The specific embodiment

Below, describe embodiments of the invention with reference to the accompanying drawings in detail.

＜embodiment 1 〉

The skeleton diagram of Fig. 1 illustrates and constitutes the speed-changing mechanism of a motor vehicle driven by mixed power actuating device part (that is transmission mechanism) 10 according to an embodiment of the invention.Speed-changing mechanism (promptly, transmission mechanism) 10 comprise: input shaft 14, differential part 11, automatic speed changing part 20 and output shaft 22, their all coaxial being configured in as being fixed in the case of transmission 12 (being designated hereinafter simply as " housing 12 ") of the non-rotatable parts on the car body.Input shaft 14 as the input turning unit is fixed on the housing 12.The differential part 11 that plays the stepless change partial action directly or via unshowned pulsation absorption damper (shock attenuation unit) is connected to input shaft 14 indirectly.Automatic speed changing part 20 (that is, playing the automatic speed changing part of step type transmission action) is configured between the box of tricks 11 and output shaft 22 that is connected in series on it.Output shaft 22 as the output turning unit is connected to automatic speed changing part 20.

The speed-changing mechanism 10 of this embodiment is suitable for horizontal FR vehicle (engine behind front wheel rear wheel drive vehicle), and be configured between the drive force source and pair of driving wheels 38 (Fig. 5) of driving engine 8 (for example engine petrol or diesel motor) form, by differential gear mechanism 36 (terminal reducing gear) and a pair of drive axle vehicle drive force is passed to this to drive wheel 38, described differential gear mechanism 36 and a pair of drive axle all constitute from driving engine 8 to this part to the power transfer path between the drive wheel 38.

In the speed-changing mechanism 10 of this embodiment, driving engine 8 and differential part 11 are connected to each other directly.Here, except the connection of not using any fluid-type transfer device (for example tor-con or fluid engage), direct connection also comprises the connection of using shock attenuation unit.Note, omitted lower part among Fig. 1 with respect to the speed-changing mechanism 10 of its axis symmetric construction.For other embodiments of the invention described below also is like this.

Differential part 11 comprises: the first electrical motor M1, power splitting mechanism 16 and the second electrical motor M2.Power splitting mechanism 16 is that it is as box of tricks with the mechanism that output on the input shaft 14 is dispensed to the first electrical motor M1 and transferring elements 18 that is input to of driving engine 8.The second electrical motor M2 can rotate integratedly with transferring elements 18.The second electrical motor M2 can be configured in any position of the power transfer path between transferring elements 18 and the drive wheel 38.In the present embodiment, each is so-called dynamoelectric machine for the first electrical motor M1 and the second electrical motor M2, and it is also as electrical generator.The first electrical motor M1 should be used as the electrical generator that produces electric energy and antagonistic force at least, and the second electrical motor M2 should be at least as the electrical motor that produces vehicle drive force.

Power splitting mechanism 16 comprises first planetary gear unit 24, the switch clutch C0 as differential gear and switches drg B0.For example, first planetary gear unit 24 of single pinion type has about 0.418 transmitting ratio (gear ratio) ρ 1.First planetary gear unit 24 has following rotating element: the first sun gear S1; The first planetary wheel P1; The first pinion carrier CA1, it supports the first planetary wheel P1 can and can rotate the planetary wheel P1 that wins around its axis rotation around the axis of the first sun gear S1; With through the first planetary wheel P1 and the first sun gear S1 ingear, the first gear ring R1.Under the situation that the number of teeth of the first sun gear S1 and the first gear ring R1 is represented by ZS1 and ZR1 respectively, above-mentioned transmitting ratio ρ 1 is represented by ZS1/ZR1.

In power splitting mechanism 16, the first pinion carrier CA1 is connected to actuating device input shaft 14, promptly be connected to driving engine 8, the first sun gear S1 and be connected to the first electrical motor M1, and the first gear ring R1 is connected to transferring elements 18.Switch drg B0 and be configured between the first sun gear S1 and the housing 12, switch clutch C0 is configured between the first sun gear S1 and the first pinion carrier CA1.When switch clutch C0 discharges with switching drg B0, power splitting mechanism 16 is placed in the differential state, under this differential state, the first sun gear S1 of first planetary gear unit 24, the first pinion carrier CA1 and the first gear ring R1 place the differential state, can relative to each other rotating, thereby carry out differential action.

Thus, the output of driving engine 8 is assigned to the first electrical motor M1 and transferring elements 18, and a part that is assigned to the output on the first electrical motor M1 is used to produce and stored energy, perhaps is used for driving the second electrical motor M2.Therefore, differential part 11 (power splitting mechanism 16) is as the automatically controlled differential gear under the stepless change state (automatically controlled CVT state) for example, and under this stepless change state, the rotating speed of transferring elements 18 can change and continuously regardless of the rotating speed of driving engine 8.In other words, differential state by power splitting mechanism 16 places the differential part 11 under the stepless change state to be used as electric steplessly variable transmission, and wherein speed ratio γ 0 (rotating speed of the rotating speed/transferring elements 18 of actuating device input shaft 14) can electrically change to maxim γ 0max from minimum value γ 0min.

In this state, by the joint of switch clutch C0 or switching drg B0, power splitting mechanism 16 is placed in the non-differential state that just can not carry out differential work of not carrying out.More specifically, when the first sun gear S1 and the first pinion carrier CA1 joint by switch clutch C0 links into an integrated entity, the rotating element that comprises first planetary gear unit 24 of the first sun gear S1, the first pinion carrier CA1 and the first gear ring R1 is placed in coupled condition, be lock-out state or non-differential state, rotating as one unit.Thus, differential part 11 also is placed in non-differential state.Like this, the rotating speed of driving engine 8 and power transmission member 18 is equal to each other, thereby differential part 11 (power splitting mechanism 16) is placed in for example fixing speed change state of non-stepless change state, step change state just, and it is as having the change-speed box that equals 1 fixed speed ratio γ 0.

Then, replace switch clutch C0 to be engaged so that the first sun gear S1 is connected to housing 12 when switching drg B0, the non-rotating state that power splitting mechanism 16 is positioned in the first sun gear S1 can not be carried out lock-out state, coupled condition or the non-differential state of differential work down.Thus, differential part 11 also is placed in non-differential state.Because the rotating speed of the first gear ring R1 is higher than the rotating speed of the first pinion carrier CA1, so power splitting mechanism 16 is as speed increasing mechanism.Differential part 11 (power splitting mechanism 16) is placed in for example fixing speed change state of non-stepless change state, step change state just, and it is fixed on the speed increasing mechanism of the value (for example about 0.7) less than 1 as speed ratio γ 0.

In the present embodiment, switch clutch C0 and switch drg B0 and optionally differential part 11 (power splitting mechanism 16) is placed the differential state, i.e. unlock state (disengaged state), or non-differential state, i.e. lock-out state.Specifically, under differential state (engagement state), differential part 11 (power splitting mechanism 16) can be used as automatically controlled differential gear work.For example, under the stepless change state, but it can be used as the work of speed ratio continually varying toric transmission.

Switch clutch C0 and switching drg B0 also place the speed change state that not can be used as automatically controlled differential gear work with differential part 11 (power splitting mechanism 16).For example, be locked in the lock-out state of fixed value at speed ratio, differential part 11 (power splitting mechanism 16) can not wherein can not be carried out stepless change work as toric transmission work.In other words, at lock-out state, differential part 11 (power splitting mechanism 16) is as having one or be no less than the single hop or the work of multistage change-speed box of two speed ratios, and not as toric transmission work, wherein can not carry out stepless change work.Lock-out state can be expressed as fixedly speed change state in other mode, and wherein differential part 11 (power splitting mechanism 16) is as having one or be no less than the single hop or the multistage change-speed box of two speed ratios.Except the state that switch clutch C0 and switching drg B0 discharge fully, above-mentioned disengaged state also comprises switch clutch C0 or switches the state (slipping state) that drg B0 half engages.

Consider from another angle, power splitting mechanism 16 be placed in non-differential state with the situation that limits its differential action under, switch clutch C0 and switching drg B0 are as the differential action restraint device, it can be worked differential part 11 is placed non-stepless change state, and being used to limit it is the work of electric controlling stepless variable speed part as automatically controlled differential gear.In addition, power splitting mechanism 16 be placed in the differential state with the situation that does not limit its differential action under, switch clutch C0 and switch drg B0 and can not place under the situation of stepless change state restriction differential part 11 as the work of automatically controlled differential gear in differential part 11.In other words, switch clutch C0 and switching drg B0 can not limit the work of differential part 11 as electric steplessly variable transmission.

Automatic speed changing part 20 comprises a plurality of planetary gear units, promptly single pinion type second planetary gear unit 26, single pinion type the third line star gear unit 28 and single pinion type fourth line star gear unit 30.Second planetary gear unit 26 comprises: secondary sun wheel S2; The second planetary wheel P2; The second pinion carrier CA2, it supports the second planetary wheel P2 makes the second planetary wheel P2 and can rotate around the axis of secondary sun wheel S2 around its axis rotation; With through the second planetary wheel P2 and the secondary sun wheel S2 ingear second gear ring R2.For example, second planetary gear unit 26 has about 0.562 transmitting ratio ρ 2.

The third line star gear unit 28 comprises: the 3rd sun gear S3; The third line star gear P3; The third line star frame CA3, it supports the third line star gear P3 makes the third line star gear P3 and can rotate around the axis of the 3rd sun gear S3 around its axis rotation; With through the third line star gear P3 and the 3rd sun gear S3 ingear the 3rd gear ring R3.For example, the third line star gear unit 28 has about 0.425 transmitting ratio ρ 3.Fourth line star gear unit 30 comprises: the 4th sun gear S4; Fourth line star gear P4; Fourth line star frame CA4, it supports fourth line star gear P4 makes fourth line star gear P4 and can rotate around the axis of the 4th sun gear S4 around its axis rotation; With through fourth line star gear P4 and the 4th sun gear S4 ingear the 4th gear ring R4.For example, fourth line star gear unit 30 has about 0.421 transmitting ratio ρ 4.

Under the situation that the number of teeth of secondary sun wheel S2, the second gear ring R2, the 3rd sun gear S3, the 3rd gear ring R3, the 4th sun gear S4 and the 4th gear ring R4 is represented by ZS2, ZR2, ZS3, ZR3, ZS4 and ZR4 respectively, above-mentioned transmitting ratio ρ 2, ρ 3 and ρ 4 are represented by ZS2/ZR2, ZS3/ZR3 and ZS4/ZR4 respectively.

In automatic speed changing part 20, secondary sun wheel S2 and the 3rd sun gear S3 are fixed to one another integratedly as one unit, optionally are connected to transferring elements 18 through second clutch C2, and optionally are fixed to housing 12 through the first drg B1.The second pinion carrier CA2 optionally is fixed to housing 12 through the second drg B2, and the 4th gear ring R4 optionally is fixed to case of transmission 12 through the 3rd drg B3.The second gear ring R2, the third line star frame CA3 and fourth line star frame CA4 are fixed to one another integratedly and be fixed to output shaft 22.The 3rd gear ring R3 and the 4th sun gear S4 are fixed to one another integratedly, and optionally are connected to transferring elements 18 through first clutch C1.

Thereby, automatic speed changing part 20 and transferring elements 18 first clutch C1 or second clutch C2 and optionally being connected to each other through being used in automatic speed changing part 20, to set up the gear change position.In other words, first clutch C1 and second clutch C2 are as the coupling device between transferring elements 18 and the automatic speed changing part 20.In other words, it can optionally place one of power delivery status and power interruption state with the power transfer path between differential part 11 (transferring elements 18) and the drive wheel 38, under power delivery status, allow through the power transfer path transferring power, under the power interruption state in the transmission of power of cracked ends power transfer path.In other words, the joint of at least one among first clutch C1 and the second clutch C2 makes above-mentioned power transfer path be placed in power delivery status, and first clutch C1 and second clutch C2 when all placing release position above-mentioned power transfer path be placed in the power interruption state.

Switch clutch C0, first clutch C1, second clutch C2, switching drg B0, the first drg B1, the second drg B2 and the 3rd drg B3 are the fluid pressure type friction engagement devices that uses in the conventional truck automatic transmission with hydraulic torque converter.These friction engagement devices comprise the multi-disc wet clutch that a plurality of friction linings of wherein overlapping each other abut against each other by hydraulic actuator, perhaps external contracting drum brake, it is by rotary drum and be wrapped on the rotary drum outer surface and be made of slack-free band of hydraulic actuator or two bands at one end.

Especially, in the present embodiment, by being arranged on the switch clutch C0 in the power splitting mechanism 16 and switching among the drg B0 any one joint, except the stepless change state that can be used as toric transmission work, differential part 11 can also constitute the fixed speed ratio state as the work of fixed speed ratio change-speed box.Thus, in speed-changing mechanism 10, being placed in fixedly by the joint of any one among switch clutch C0 and the switching drg B0, the differential part 11 and the automatic speed changing part 20 of speed change state constitute the step change state that can be used as step change transmission work.Neither engage the differential part 11 and the automatic speed changing part 20 that are placed in the stepless change state by switch clutch C0 and switching drg B0 and constitute the stepless change state that can be used as toric transmission work.

In other words, speed-changing mechanism 10 switches to the step change state by the joint of any among switch clutch C0 and the switching drg B0, and neither engages the stepless change state that switches to by switch clutch C0 and switching drg B0.Differential part 11 is to switch to the change-speed box that the step change state can switch to the stepless change state again.

More specifically, be placed in non-stepless change state so that speed-changing mechanism 10 is used as under the situation of step change transmission in differential part 11, switch clutch C0 or switching drg B0 are engaged, wherein first clutch C1, second clutch C2, the first drg B1, the second drg B2 and the 3rd drg B3 are selectively engaged, and just relevant with the speed change of automatic speed changing part 20 coupling device optionally discharges and engages.This for example allows the fluid control friction engagement device relevant with speed change (hereinafter referred to as " discharge side engagement device ") to be released with another fluid control friction engagement device (hereinafter referred to as " engage side coupling device ") of being correlated with speed change respectively to be engaged.Discharge side engagement device and engage side coupling device and engage, make and optionally set up first gear (first gear stage) to one of the 5th gear (the 5th gear stage), backing car gear (activation point backward) and Neutral Position, automatically to change speed ratio.

Thus, overall ratio γ the T (=input shaft rotating speed N of speed-changing mechanism 10 _IN/ output shaft rotational speed N _OUT) be to obtain basically for each gear with the ratio that equates.This explanation overall ratio γ T of speed-changing mechanism 10 as a whole is based on that the speed ratio γ of the speed ratio γ 0 of differential part 11 and automatic speed changing part 20 sets up.

For example, when speed-changing mechanism 10 is used as step change transmission, as shown in Figure 2, the joint of switch clutch C0, first clutch C1 and the 3rd drg B3 set up have for example about 3.357 the most at a high speed than first gear of γ 1, the joint of switch clutch C0, first clutch C1 and the second drg B2 set up have less than speed ratio γ 1, second gear of about 2.180 speed ratio γ 2 for example.In addition, the joint of switch clutch C0, first clutch C1 and the first drg B1 set up have less than speed ratio γ 2, the third gear of about 1.424 speed ratio γ 3 for example, the joint of switch clutch C0, first clutch C1 and second clutch C2 set up have less than speed ratio γ 3, the fourth speed position of about 1.000 speed ratio γ 4 for example.

First clutch C1, second clutch C2 and the joint that switches drg B0 set up have less than speed ratio γ 4, the 5th gear of about 0.705 speed ratio γ 5 for example.In addition, the joint of second clutch C2 and the 3rd drg B3 set up have between speed ratio γ 1 and γ 2, the backing car gear of about 3.209 speed ratio γ R for example.Set up Neutral Position N by only engaging switch clutch C0.

Be placed in the stepless change state so that speed-changing mechanism 10 is used as under the situation of toric transmission in differential part 11, switch clutch C0 and switching drg B0 both are released.Thus, differential part 11 is used as toric transmission, and the automatic speed changing part 20 that is connected to differential part 11 is used as step change transmission.For at least one gear stage M of automatic speed changing part 20, the rotating speed (being the rotating speed of transferring elements 18) that is input to automatic speed changing part 20 infinitely changes at the continuous ratio coverage that is used for relevant gear stage M.Thus, the overall ratio γ T of speed-changing mechanism 10 can change continuously.

But when speed-changing mechanism 10 was used as toric transmission, as shown in Figure 2, switch clutch C0 and switching drg B0 were released.Thus, differential part 11 is as toric transmission, and the automatic speed changing part 20 that is connected in series on it is used as step change transmission.Rotating speed be imported into place first, second, third and a gear of fourth speed position under automatic speed changing part 20.Therefore, because the speed ratio of automatic speed changing part 20 can change on adjacent gear continuously, so the overall ratio γ T of speed-changing mechanism 10 can change continuously.

The alignment chart of Fig. 3 is illustrated in the relation between the rotating speed of different rotary element under each gear of speed-changing mechanism 10 with straight line.Speed-changing mechanism 10 is by constituting as the differential part 11 of the stepless change part or first variable part and as the automatic speed changing part 20 of the variable part (step change part) or second variable part.The alignment chart of Fig. 3 is the right angle two-dimensional coordinate system, and wherein the transmitting ratio ρ of

planetary gear unit

24,26,28,30 is taken as along transverse axis, and the relative rotation speed of rotating element is taken as along the longitudinal axis.Article three, in the horizon lower one be that X1 represents 0 rotating speed; And be that X2 represents 1.0 rotating speed by last one in three horizons, just be connected to the operating speed NE of the driving engine 8 of input shaft 14.Horizon XG represents the rotating speed of transferring elements 18.

From left to right represent the relative rotation speed of the 3rd rotating element (three element) RE3 of first rotating element (first element) RE1 of second rotating element (second element) RE2, the first pinion carrier CA1 form of the first sun gear S1 form and the first gear ring R1 form respectively with three elements of differential part 11 cooresponding three vertical curve Y1, Y2 and Y3.Distance among vertical curve Y1, Y2 and the Y3 between the adjacent vertical curve is determined corresponding to the transmitting ratio ρ 1 of first planetary gear unit 24.

In addition, the relative rotation speed of from left to right representing the 4th rotating element (quaternary part) RE4, the 5th rotating element (the 5th element) RE5, the 6th rotating element (the hexa-atomic) RE6, the 7th rotating element (the 7th element) RE7 and the 8th rotating element (the 8th element) RE8 corresponding to five vertical curve Y4, Y5, Y6, Y7 and Y8 of automatic speed changing part 20 respectively.The 4th rotating element RE4 adopts the second and the 3rd sun gear S2 fixed to one another integratedly, the form of S3, and the 5th rotating element RE5 adopts the form of the second pinion carrier CA2, and the 6th rotating element RE6 adopts the form of the 4th gear ring R4.The 7th rotating element RE7 adopts second gear ring R2 fixed to one another integratedly and the form of the third and fourth pinion carrier CA3, CA4, and the 8th rotating element RE8 adopts the 3rd gear ring R3 fixed to one another integratedly and the form of the 4th sun gear S4.Distance among these vertical curves Y4 to Y8 between the adjacent vertical curve is determined by transmitting ratio ρ 2, ρ 3 and the ρ 4 of second, third and fourth line

star gear unit

26,28 and 30.

In the relation between the vertical curve of alignment chart, when promptly distance was set to " 1 " to the interval between sun gear and the pinion carrier, the interval between pinion carrier and the gear ring was set to the corresponding interval of transmitting ratio ρ with planetary gear unit.In other words, in differential part 11, the interval between vertical curve Y1 and the Y2 is set to the interval corresponding to " 1 ", and the interval between vertical curve Y2 and the Y3 is set to the interval corresponding to ρ.In automatic speed changing part 20, in second, third and the fourth line

star gear unit

26,28 and 30 each, the interval between sun gear and the pinion carrier is set to " 1 ", and the distance between pinion carrier and the gear ring is set to transmitting ratio ρ.

Alignment chart with reference to Fig. 3 describes, in power splitting mechanism (stepless change part 11), the speed-changing mechanism 10 of this embodiment is configured such that: the first rotating element RE1 (the first pinion carrier CA1) as one of three rotating elements of first planetary gear unit 24 is fixed to input shaft 14, and optionally is connected to the second rotating element RE2 (the first sun gear S1) as another rotating element through switch clutch C0.The second rotating element RE2 is fixed to the first electrical motor M1 and optionally is fixed to housing 12 through switching drg B0.The 3rd rotating element RE3 (the first gear ring R1) as another rotating element is fixed to the transferring elements 18 and the second electrical motor M2.Thereby the rotation of input shaft 14 is transmitted (input) to automatic speed changing part 20 through transferring elements 18.Represent the relation between the rotating speed of the first sun gear S1 and the first gear ring R1 through the angled straight lines L0 of the intersection point between line Y2 and the X2.

For example, when the release by switch clutch C0 and drg B0 made speed-changing mechanism 10 switch to stepless change state (differential state), the rotating speed of the first sun gear S1 that is represented by the intersection point between straight line L0 and the vertical curve Y1 raise by the rotating speed of controlling the first electrical motor M1 or reduces.For example, under the differential state, at least the second rotating element RE2 rotates with different rotating speeds with the 3rd rotating element RE3.When depending on vehicle velocity V during the rotating speed substantially constant of the first definite gear ring R1, the rotating speed of the first pinion carrier CA1 that represents by the intersection point between straight line L0 and the vertical curve Y2 (engine speed N just _E) raise or reduction.

When the first sun gear S1 and the first pinion carrier CA1 joint by switch clutch C0 was connected to each other, power splitting mechanism 16 entered wherein above-mentioned three rotating element RE1, RE2 and RE3 rotates the non-differential state of (promptly at least the second rotating element RE2 and the 3rd rotating element RE3 are with the same rotational speed rotation) together.Thereby straight line L0 aims at horizon X2, thus transferring elements 18 with engine speed N _EIdentical rotating speed rotation.

Replacedly, when the first sun gear S1 was connected with housing 12 by the joint that switches drg B0, power splitting mechanism 16 entered wherein engine speed N _EStop and at least the second rotating element RE2 and the 3rd rotating element RE3 not with the non-differential state of identical speed rotation, thereby differential part 11 is as speed increasing mechanism.Therefore, the rotating speed (being the rotating speed of transferring elements 18) of the first gear ring R1 that is represented by straight line L0 under the state shown in Figure 3 and the intersection point between the vertical curve Y3 is to be higher than engine speed N _ERotating speed be imported into automatic speed changing part 20.

In automatic speed changing part 20, the 4th rotating element RE4 optionally is connected to transferring elements 18 through second clutch C2, and optionally is fixed to housing 12 through the first drg B1; The 5th rotating element RE5 optionally is fixed to housing 12 through the second drg B2; And the 6th rotating element RE6 optionally is fixed to housing 12 through the 3rd drg B3.The 7th rotating element RE7 is fixed to output shaft 22, and the 8th rotating element RE8 optionally is connected to transferring elements 18 through first clutch C1.

As shown in Figure 3, in automatic speed changing part 20, when first clutch C1 and the 3rd drg B3 joint, the rotating speed of output shaft 22 is represented by the intersection point between angled straight lines L1 and the vertical curve Y7 under first gear.Here, angled straight lines L1 process is represented the vertical curve Y8 and the intersection point between the horizon X2 of the 8th rotating element RE8 rotating speed and is represented the vertical curve Y6 of the 6th rotating element RE6 rotating speed and the intersection point between the horizon X1.

Similarly, the intersection point between the vertical curve Y7 that the rotating speed of output shaft 22 is fixed to the 7th rotating element RE7 rotating speed on the output shaft 22 by determined angled straight lines L2 of joint and expression by the first clutch C1 and the second drg B2 under second gear is represented.Intersection point between the vertical curve Y7 that the rotating speed of output shaft 22 is fixed to the 7th rotating element RE7 rotating speed on the output shaft 22 by determined angled straight lines L3 of joint and expression by the first clutch C1 and the first drg B1 under the third gear is represented.The rotating speed of output shaft 22 is represented by the intersection point between the vertical curve Y7 that is fixed to the 7th rotating element RE7 rotating speed on the output shaft 22 by determined horizontal line L 4 of the joint of first clutch C1 and second clutch C2 and expression under the fourth speed position.

To the fourth speed position, because the joint of switch clutch C0, be imported into the 8th rotating element RE8 at first gear from the power of differential part 11 (just power splitting mechanism 16), the 8th rotating element RE8 with engine speed N _EIdentical rotating speed rotation.But when switching drg B0 replaces switch clutch C0 to engage,, the propulsive effort from differential part 11 is higher than engine speed N owing to being imported into rotating speed _EThe 8th rotating element RE8, so the rotating speed of output shaft 22 is represented by the intersection point between horizontal line L 5 and the vertical curve Y7 under the 5th gear.Here, horizontal line L 5 is to determine that by the joint of first clutch C1, second clutch C2 and switching drg B0 vertical curve Y7 represents to be fixed to the rotating speed of the 7th rotating element RE7 on the output shaft 22.

Fig. 4 illustrates the signal that is input to electronic control package 40 and from the signal of its output with control speed-changing mechanism 10.This electronic control package 40 comprise have CPU, the so-called microcomputer of ROM, RAM and input/output interface.Carry out signal conditioning by the ephemeral data memory function of utilizing RAM according to the program that is stored among the ROM, electronic control package 40 is implemented the hybrid power drive controlling of driving engine 8 and electrical motor M1 and M2, and the drive controlling such as the variable speed control of automatic speed changing part 20.

Various signals from various sensors shown in Figure 4 and switch are imported into electronic control package 40, and these signals comprise: the cooling water temperature TEMP of expression driving engine _WSignal; Represent selected operating position P _SHSignal; The operating speed N of expression driving engine 8 _ESignal; The signal of the setting value of expression gear ratio sets; The signal of expression M pattern (motor drive mode) instruction; The signal of expression air-conditioning serviceability; The rotational speed N of expression and output shaft 22 _OUTThe signal of corresponding vehicle velocity V; The signal of the power fluid temperature of expression automatic speed changing part 20; The signal of the serviceability of expression Parking Brake; The signal of the serviceability of expression foot-operated brake; The signal of expression catalyst temperature; The signal of the aperture amount Acc of expression acceleration pedal; The signal of expression cam angle degree; The signal of expression snowfield drive pattern; The signal of the longitudinal acceleration value G of expression vehicle; And the signal of expression automatic cruising drive pattern.

Shu Ru signal comprises in addition: the signal of expression vehicle weight; The signal of representing the wheel speed of each drive wheel; The signal of the operation of expression step change switch, this step change switch are used for that differential part 11 (power splitting mechanism 16) is changed to step change state (lock-out state) makes speed-changing mechanism 10 as step change transmission; The signal of the operation of expression stepless change switch, this stepless change switch are used for that differential part 11 (power splitting mechanism 16) is changed to stepless change state (differential state) makes speed-changing mechanism 10 as toric transmission; The rotational speed N of representing the first electrical motor M1 _M1Signal; The rotational speed N of representing the second electrical motor M2 _M2Signal; And the signal of the charging capacity (charge condition) of expression electrical storage device 60.

The various signals of electronic control package 40 output control driving engine outputs comprise: drive the aperture θ of throttle actuator with the throttle gate 94 of control driving engine 8 _THSignal, control is ejected into the signal of the fuel duty in each cylinder of driving engine 8 by Fuel Injection Device 96, control the signal of the timing of ignition of driving engine 8 by ignition device 98, regulate the signal of supercharger pressure, the signal of operation electric air-conditioning, the signal of operating motor M1 and M2, operation is used to represent the signal of speed range indicating device of the selected operating position of shifter bar, the signal of the transmitting ratio indicating device of operation expression transmitting ratio, the operation expression is to the signal of the snowfield mode indicator of the selection of snowfield drive pattern, operate the signal of the ABS actuator of the ABS (Anti-lock Braking System) that is used for wheel, be used to represent signal with operation to the M mode indicator of the selection of M pattern.

Also export following signal in addition: the signal of the electromagnetic control valve of combination in operation hydraulic control circuit 42 (with reference to figure 5), this hydraulic control circuit 42 are provided to control the hydraulic actuator of the hydraulic operation friction engagement device of differential part 11 and automatic speed changing part 20; Operate the signal of the electric oil pump of the hydraulic power source that is used as hydraulic control circuit 42; Drive the signal of electric heater; Be applied to the signal of cruising control computing machine; And the signal of expression Fuel Injection Device.

Fig. 5 is the functional block diagram of the major control function that is used to illustrate that electronic control package 40 carries out.In Fig. 5, step change control setup 54 is carried out the speed change of automatic speed changing part 20.For example, step change control setup 54 is based on expression vehicle velocity V and automatic speed changing part 20 required output torque T _OUTVehicle condition by distinguish in (promptly judging) automatic speed changing part 20 whether carry out gear shift with reference to speed change figure (relation and speed change arteries and veins spectrogram), above-mentioned speed change figure is pre-stored in the memory storage 56, it is as shown in the solid line among Fig. 6 and single-point are rule.

In other words, step change control setup 54 picks out the gear stage that automatic speed changing part 20 need be converted into, and carries out gear shift to allow automatic speed changing part 20, thus the gear stage that acquisition picks out.At this moment, step change control setup 54 is to hydraulic control circuit 42 output commands (speed change output command, hydraulic pressure command), be used to engage and/or discharge except that switch clutch C0 and switch hydraulic operation friction engagement device the drg B0, so that for example realize the gear stage of needs according to start table shown in Figure 2.

Hybrid power control setup 52 is as the stepless change control setup.It allows speed-changing mechanism 10 to be placed in the stepless change state, just allows differential part 11 to be placed in the differential state, so that driving engine 8 moves in high efficiency range of operation.Simultaneously, the propulsive effort of the 52 pairs of driving engines 8 of hybrid power control setup and the second electrical motor M2 distributes, and makes the first electrical motor M1 produce electric power with the variation of optimizing with antagonistic force.This allows the speed ratio γ 0 as electric controlling stepless variable speed differential part 11 is partly controlled.

For example, under relevant moving velocity, hybrid power control setup 52 calculates various factors, for example: based on the accelerator opening Acc of the output demand variable of representing chaufeur and target (demand) output that vehicle velocity V is calculated vehicle; Target output and charging requirements based on vehicle calculate the general objective output that needs; And load on consideration transmission loss, the auxiliary unit and the required assist torque of the second electrical motor M2 wait calculates the target engine output that is used to obtain general objective output.Then, hybrid power control setup 52 control engine speed N _EWith motor torque T _E,, control the rated value of the electric energy that produces by the first electrical motor M1 simultaneously with the target engine output that obtains to calculate.

In the gear stage of considering automatic speed changing part 20, hybrid power control setup 52 carries out hybrid power control to obtain driving tractive performance, improves fuel efficiency simultaneously.Such hybrid power control allows differential part 11 as electric steplessly variable transmission, is used to make the engine speed N of driving engine 8 with high-efficiency operation to allow to be determined _EWith based on the selected gear stage of vehicle velocity V and automatic speed changing part 20 and the rotating speed of definite transferring elements 18 be complementary.

For this reason, hybrid power control setup 52 will be pre-stored in wherein by predetermined optimal fuel economy curve (fuel efficiency arteries and veins spectrogram and relation) on experiment basis.At vehicle run duration under the stepless change state, this allows to fasten between the fuel efficiency of the driving of vehicle and driving engine 8 at two-dimensional coordinate and is traded off, and the parameter of this two-dimensional coordinate system for example comprises engine speed N _EOutput torque (motor torque) T with driving engine 8 _E

Thus, hybrid power control setup 52 is determined the expected value of the overall ratio γ T of speed-changing mechanism 10, to obtain making driving engine produce the motor torque T that for example exports the output of (general objective output and required propulsive effort) needs for satisfying target _EWith engine speed N _EThis makes driving engine 8 to move with the optimal fuel economy curve.Then, the speed ratio γ 0 of hybrid power control setup 52 control differential parts 11 is to realize expected value.This allows overall ratio γ T can be controlled in the variable speed range, for example between 13 and 0.5.

In such hybrid power control, hybrid power control setup 52 allows to be fed to the electrical storage device 60 and the second electrical motor M2 by the electric energy that the first electrical motor M1 produces through inverter 58.This allows the main portion of the propulsive effort of driving engine 8 to be mechanically transmitted to transferring elements 18.At this moment, the part of the propulsive effort of driving engine is consumed by the first electrical motor M1, is used to produce the electric power that will be converted into electric energy.This electric energy is fed to the second electrical motor M2 through inverter 58, thereby the second electrical motor M2 is driven, will be delivered to transferring elements 18 from the propulsive effort of the second electrical motor M2.Constituted electrical path to electric energy by the relevant equipment of the work the stage of second electrical motor M2 consumption with the stage from the generation electric energy, wherein the part of the propulsive effort of driving engine 8 is converted into electric energy, and this electric energy is converted into mechanical energy again.

Especially, carry out at step change control setup 54 under the situation of variable speed control of automatic speed changing parts 20, make the speed ratio of automatic speed changing part 20 have level to change, thereupon, before and after relevant speed change, the overall ratio γ T of speed-changing mechanism 10 has level to change.In other words, be different from the automatic speed changing part of the stepless variation of speed ratio, before and after automatic speed changing part 20 speed changes, overall ratio γ T is not continuous variation, but speed ratio is forced to stepped variation, just changes in discrete mode.

Therefore, hybrid power control setup 52 allows the differential part 11 and the transmission synchronization of automatic speed changing part 20 to carry out speed change, changes with the level that has that suppresses speed change front and back overall ratio γ T in the speed-change process of automatic speed changing part 20.In other words, the rotating speed of the transferring elements 18 that causes for speed change (the second electrical motor M2) (the input speed N of expression automatic speed changing part 20 by automatic speed changing part 20 _IN) variation, engine speed N _EVariation be adjusted to less than given engine speed N _E'.

In other words, hybrid power control setup 52 allows the differential parts 11 and the transmission synchronization of automatic speed changing part 20 to carry out speed change, makes engine speed N _EBefore and after the speed change of automatic speed changing part 20, change continuously, to suppress because the engine speed N that the automatically controlled CVT function (differential action) of differential part 11 causes _EVariation.

In other words, hybrid power control setup 52 usefulness act on the rotational speed N that changes the first electrical motor M1 _M1Motor control assembly, to change engine speed N before and after automatic speed changing part 20 speed changes continuously _E, and no matter how the rotating speed of transferring elements 18 (the second electrical motor M2) changes.Here employed term " given engine speed N _E' " refer to that such given value, its target are the speed ratio that changes based on the differential part 11 of experiment pre-stored along with changing, wherein engine speed N _EVariation be suppressed before and after automatic speed changing part 20 speed changes so that changes continuous.

For example, hybrid power control setup 52 makes that the transition change of overall ratio γ T is not to change in discrete mode before and after the speed change in automatic speed changing part 20, but takes place continuously, with engine speed N _ERemain on substantially invariable level.Therefore, differential part 11 is carried out speed change with the transmission synchronization of automatic speed changing part 20, changes speed ratio γ 0 with the side that changes at the speed ratio γ with automatic speed changing part 20 in the opposite direction.For example, go up in the opposite direction in the side that the speed ratio γ with automatic speed changing part 20 changes, speed ratio γ 0 change changes a cooresponding variable quantity with the level that has of the speed ratio γ of automatic speed changing part 20.

Therefore, change, also can before and after speed change, suppress engine speed N even the speed change of automatic speed changing part 20 is accompanied by the level that has of its speed ratio _EThe level that has change, suppress speed change thus and impact.

From another perspective, for step change transmission commonly used, driving engine 8 is worked in the mode of single-point line shown in Figure 7.Simultaneously, for toric transmission, driving engine 8 is in the mode of saving rate curve along the optimum fuel of the driving engine 8 shown in the dotted line of Fig. 7 or to work than a mode of being saved rate curve by the more close optimum fuel of the curve that has grade transmission of power to realize.Thus, toric transmission can realize being used to wait to obtain the motor torque T of driving torque _E, be used at engine speed N _EFollowing driving torque (propulsive effort) to save the mode meet requirements of rate curve than the more close optimum fuel of the curve of step change transmission.

Thereby toric transmission is considered to be in saving of fuel effect aspect and is better than step change transmission.Thus, the speed ratio γ 0 of hybrid power control setup 52 control differential parts 11, so that driving engine 8 comes work along for example saving rate curve by the optimum fuel shown in the dotted line of Fig. 7, make that fuel efficiency can variation, even automatic speed changing part 20 is carried out speed change its speed ratio have level to change also can be like this.This makes and can make whole speed-changing mechanism 10 as toric transmission, thereby improves fuel efficiency.

As mentioned above, 52 pairs of differential parts of hybrid power control setup 11 are carried out so-called synchronous variable speed control, to carry out speed change with the transmission synchronization of automatic speed changing part 20.The initial timing that differential part 11 is carried out synchronous variable speed control is to consider the judgement of being undertaken by the speed change to automatic speed changing part 20 that step change control setup 54 is realized and the operating lag that is used to change between the practical operation of coupling device of transferring elements 18 (the second electrical motor M2) rotating speed is set.

Here employed term " operating lag " refers to the timing of speed change take place in the speed-change process of automatic speed changing part 20 and follow input speed N _INThe variation (rotational speed N of transferring elements 18 just ₁₈Variation) begin the operating lag between the timing of so-called inertia phase.For example, operating lag can obtain in advance and be stored based on experiment, perhaps along with the rotational speed N of transferring elements 18 ₁₈The actual change that takes place, hybrid power control setup 52 can begin the synchronous variable speed control of differential part 11.

In addition, when inertia phase was finished, differential part 11 stopped synchronous variable speed control in the speed-change process of automatic speed changing part 20.For example, the speed change time of automatic speed changing part 20 can for example obtain and storage in advance based on experiment in advance.Replacedly, hybrid power control setup 52 can be in the rotational speed N of transferring elements 18 ₁₈When reality does not change (just at the actual speed N of transferring elements 18 ₁₈Rotational speed N with transferring elements 18 after the speed change ₁₈Near synchronously the time) stop the synchronous variable speed control of differential part 11.

Thereby during the inertia phase that occurs in the speed-change process of automatic speed changing part 20 (interval), hybrid power control setup 52 makes differential part 11 carry out speed change to carry out synchronous variable speed control.For example, inertia phase appear at based on experiment obtain in advance during in, perhaps come across rotational speed N at transferring elements 18 ₁₈The rotational speed N of actual change and transferring elements 18 takes place ₁₈During between no longer changing.In other words, hybrid power control setup 52 makes differential part 11 carry out speed change in the inertia phase that the speed change by automatic speed changing part 20 causes.This makes differential part 11 to carry out speed change with the transmission synchronization of automatic speed changing part 20.

Hybrid power control setup 52 functionally comprises engine output controller.Engine output controller allows throttle actuator to carry out throttle-valve control, to open or close electronic throttle 94.In addition, hybrid power control setup 52 allows Fuel Injection Device 96 control fuel injection amounts and fuel injection timing to carry out fuel injection control.In addition, hybrid power control setup 52 independences or array output instruction.This allows driving engine 8 to export control so that required driving engine output to be provided basically.For example, hybrid power control setup 52 drives throttle actuator in response to the (not shown) that concerns of accelerator opening signal Acc by the reference pre-stored, makes throttle _THIncrease along with the increase of accelerator opening Acc.

Be not subjected to driving engine 8 to be in the constraint of halted state or idling mode, hybrid power control setup 52 can be controlled by the automatically controlled CVT function (differential function) of differential part 11, so that vehicle operating or be driven.Solid line A among Fig. 6 represents the boundary line between driving engine operation area and the motor operation area, switch between driving engine 8 and electrical motor (for example, the second electrical motor M2) in the vehicle drive force source that is used for starting/operation (below be called " be used for operation ") vehicle.In other words, this boundary line is used for switching between so-called engine operation mode and so-called motor operational mode, under engine operation mode, driving engine 8 usefulness act on the operation drive force source of starting/operation (below be called " RUN ") vehicle, under the motor operational mode, the second electrical motor M2 driving propulsion source that acts on operational vehicle.

The relation of pre-stored has be used for the boundary line as shown in Figure 6 (solid line A) of switching between driving engine operation area and motor operation area, the example of the drive force source switching figure (drive force source arteries and veins spectrogram) that forms in this relation expression two-dimensional coordinate system, this two-dimensional coordinate system adopts the vehicle velocity V and the output torque T of expression drive-force-related value _OUTAs parameter.This drive force source is switched legend and is stored in advance in the memory storage 56 as the solid line in Fig. 6 with by the speed change figure (speed change arteries and veins spectrogram) of single-point line expression.

Hybrid power control setup 52 is based on the output torque T by vehicle velocity V and needs _OUTThe vehicle condition of expression is judged by reference example drive force source switching figure as shown in Figure 6, is in motor operation area or the driving engine operation area with discovery, realizes motor operation area or driving engine operation area thus.As shown in Figure 6, at output torque T _OUTRelatively low just low motor torque T _EZone (wherein engine efficiency is usually less than the high torque (HT) zone), perhaps just low load area in the relatively low low speed of a motor vehicle zone of vehicle velocity V, hybrid power control setup 52 carries out the motor operation.

Therefore, when vehicle launch, actuating motor starting usually.But, make required output torque T in drive force source switching figure shown in Figure 6 more deeply according to being pressed down when acceleration pedal _OUTExceed the motor operation area and just exceed required motor torque T _EThe time vehicle-state, carry out engine starting usually.

In order to suppress driving engine 8 dragging under its halted state (drag) to improve fuel efficiency, in the motor operation area, hybrid power control setup 52 makes differential part 11 can carry out automatically controlled CVT function (differential function).This makes it possible to the rotational speed N with the first electrical motor M1 _M1Be controlled to be negative rotating speed, for example idling mode.This makes engine speed N _EBe retained as zero or be zero substantially.

In addition, even under the driving engine operation area, hybrid power control setup 52 can allow to set up electrical path.At this moment, the electric energy from the first electrical motor M1 and/or electrical storage device 60 is supplied to the second electrical motor M2.Thus, the second electrical motor M2 is driven, and it is auxiliary to make that it can carry out torque to the propulsive effort of driving engine 8.Thus, in illustrated embodiment, the driving engine operation area can cover and comprise the state that the driving engine operation area combines with the motor operation area.

In addition, be not subjected to vehicle to be in the constraint of halted state or low speed driving state, hybrid power control setup 52 can make differential part 11 have automatically controlled CVT function, and by this function, driving engine 8 can remain under the running state.For example, if descend at the charge condition SOC of vehicle stopping period electrical storage device 60, then the first electrical motor M1 need produce electric power.At this moment, the propulsive effort of driving engine 8 makes the first electrical motor M1 produce electric power, and the rotating speed of the first electrical motor M1 increases simultaneously.Thus, even by the rotational speed N of the well-determined second electrical motor M2 of vehicle velocity V _M2Become zero (near zero) owing to vehicle is in halted state, power splitting mechanism 16 is also carried out differential action.This makes engine speed N _ECan remain and surpass the rpm level that is used for autonomous rotation.

In addition, hybrid power control setup 52 allows differential part 11 to carry out automatically controlled CVT function, to control the rotational speed N of the first electrical motor M1 _M1Rotational speed N with the second electrical motor M2 _M2This makes engine speed N _ECan remain on the rotating speed of any level, and not be subjected to vehicle to remain on the constraint of halted state or running state.In other words, hybrid power control setup 52 is with the rotational speed N of the first electrical motor M1 _M1And/or the rotational speed N of the second electrical motor M2 _M2Control to any level, simultaneously with engine speed N _ERemain steady state value or arbitrary value.For example, as understandable, as engine speed N from alignment chart shown in Figure 3 _EDuring increase, hybrid power control setup 52 carries out the rotational speed N of work with the first electrical motor M1 that raises _M1, simultaneously because the restriction of vehicle velocity V and with the rotational speed N of the second electrical motor M2 _M2Remain on the level of basic fixed.

Speedup shelves decision maker 62 is judged switch clutch C0 and is switched among the drg B0 which and will be engaged and be used for speed-changing mechanism 10 is placed under the step change state.In other words, based on vehicle condition, for example according to being stored in the memory storage 56 in advance and as shown in Figure 6 speed change figure judges, with draw treat in the speed-changing mechanism 10 speed change to gear whether be in the speedup gear, the 5th gear for example.

Switching control 50 switches coupling device (switch clutch C0 and switching drg B0) according to vehicle condition between engagement state and release position.This allows optionally to switch to stepless change state or step change state, i.e. differential state or lock-out state.For example, switching control 50 is based on by vehicle velocity V and demand output torque T _OUTThe vehicle condition of expression is judged the speed change state that whether will switch speed-changing mechanism 10 (differential part 11).This judgement is by with reference to being stored in the memory storage 56 in advance and the speed change figure that is represented by dotted line and long and two-short dash line in Fig. 6 (speed change arteries and veins spectrogram and relation) carries out.

In other words, judge to draw speed-changing mechanism 10 and be in the stepless change control area that is used for the stepless change state and still be in the step change control area that is used for the step change state.Thus, judge and to treat the speed change state switched by speed-changing mechanism 10.

More specifically, if judge that speed-changing mechanism 10 is in the step change control area, then switching control 50 forbidding or to interrupt hybrid power control or stepless change control, and allows the speed change that grade speed-change control device 54 is implemented the step change work that is used to be scheduled to hybrid power control setup 52 output commands.When this took place, step change control setup 54 allows automatic speed changing part 20, and for example basis was stored in the memory storage 56 in advance and speed change figure as shown in Figure 6 carries out automatic speed changing.

For example, Fig. 2 represents to be stored in advance the start table in the memory storage 56, the start combination of its expression hydraulic operation friction engagement device (just in variable speed control to be selected power-transfer clutch C0, C1, C2 and drg B0, B1, B2, B3).In other words, whole speed-changing mechanism 10 (just differential part 11 and automatic speed changing part 20) integral body is used as the so-called grade automatic transmission with hydraulic torque converter that has, and sets up gear according to start table shown in Figure 2 thus.

If speedup shelves decision maker 62 is judged to be the 5th gear, then switching control 50 is used to discharge switch clutch C0 and engages and switch drg B0 to hydraulic control circuit 42 output commands.This makes differential part 11 as the auxiliary gear box with fixed speed ratio γ 0, and for example speed ratio γ 0 equals " 0.7 ".Thus, speed-changing mechanism 10 can mass action to obtain the speedup gear, just speed ratio is less than 1.0 what is called " hypervelocity gear ".

On the contrary, if speedup shelves decision maker 62 is not judged the 5th gear, then switching control 50 is used to engage switch clutch C0 and discharges and switch drg B0 to hydraulic control circuit 42 output commands.This makes differential part 11 as the auxiliary gear box with fixed speed ratio γ 0, and for example speed ratio γ 0 equals 1.Thus, speed-changing mechanism 10 can mass action, to obtain speed ratio greater than 1.0 deceleration gear.Like this, switching control 50 can carry out the switching of speed-changing mechanism 10 under the step change state, and optionally carries out the switching of any two kinds of gears under the step change state.This makes differential part 11 as auxiliary gear box, and the automatic speed changing part 20 that is connected in series on the differential part 11 is used as step change transmission.Thereby speed-changing mechanism 10 is used as the so-called grade automatic transmission with hydraulic torque converter that has on the whole.

On the contrary, if judge that speed-changing mechanism 10 should be switched to the stepless change state, then switching control 50 is used to discharge switch clutch C0 and switches drg B0 to hydraulic control circuit 42 output commands.This makes speed-changing mechanism 10 be placed in the stepless change state, is used for carrying out stepless change.Thus, speed-changing mechanism 10 mass actions are to obtain the stepless change state.

Simultaneously, switching control 50 to hybrid power control setup 52 output commands allowing hybrid power control, and to step change control setup 54 output signals speed-changing mechanism 10 is fixed on the gear of the stepless change state that is used to be scheduled to.Replacedly, to step change control setup 54 output signals, for example basis is stored in the memory storage 56 in advance and speed change figure as shown in Figure 6 carries out automatic speed changing to allow automatic speed changing part 20.In this case, automatic speed changing is carried out in the operation shown in the start table of step change control setup 54 execution graphs 2 (except the bonding operation of switch clutch C0 and drg B0) thus.

Like this, switching control 50 switches to the stepless change state that places with differential part 11, to be used as toric transmission.In addition, the automatic speed changing part 20 that is connected in series on the differential part 11 is used as step change transmission.This makes and produces the propulsive effort with suitable amplitude.Simultaneously, in first gear, second gear, third gear and the fourth speed position each, stepless variation takes place in the rotating speed (just being applied to the rotating speed of the transferring elements 18 on the automatic speed changing part 20) that is input to automatic speed changing part 20.Thus, on range of infinitely variable speeds, set up the speed ratio of each gear.Therefore, because speed ratio can change on adjacent gear continuously, speed-changing mechanism 10 can be realized overall ratio γ T under the stepless change state.

To describe Fig. 6 in detail, it illustrates the speed change figure (speed change arteries and veins spectrogram or relation) that is stored in advance in the memory storage 56, is used for judging to carry out gear shift in automatic speed changing part 20.Fig. 6 illustrates the example of the speed change figure that draws in the two-dimensional coordinate, and the parameter of this two-dimensional coordinate is the demand output torque T of vehicle velocity V and expression drive-force-related value _OUTIn Fig. 6, solid line is represented the line that upgrades, and the single-point line represents to lower category line.

In addition, in Fig. 6, it still is judgement vehicle velocity V 1 and the judgement output torque T1 that the step change control area is judged that dotted line represents to be used for 50 pairs of stepless change controles area of switching control.In other words, the dotted line among Fig. 6 represents that two are judged line.One of them is that the high speed of a motor vehicle of being scheduled to is judged line, and it forms a series of judgement vehicle velocity V 1 that the predetermined high-speed cruising of expression is judged line, is used to judge that motor vehicle driven by mixed power is in the high-speed cruising zone.Another is that line is judged in the height output operation of being scheduled to, it forms a series of judgement output torque T1 that line is judged in the predetermined height output operation of expression, be used to judge the drive-force-related value relevant, just for example be used for the output torque T of automatic speed changing part 20 with motor vehicle driven by mixed power _OUTHeight output operation area, to indicate high output.

In addition, opposite with dotted line shown in Figure 6, shown in the long and two-short dash line of Fig. 6, being in the step change control area for judgement still is that the stepless change control area is provided with hysteresis.In other words, Fig. 6 represents to be used for the switching figure of storage in advance (switching arteries and veins spectrogram and relation) of switching control 50, to judge vehicle velocity V 1 and the vehicle velocity V and the output torque T that judge output torque T1 based on covering _OUTThe parameter of form is in the regional determination that the stepless change control area still is the step change control area.In addition, memory storage 56 bank switching arteries and veins spectrogram (comprising such switching figure) in advance.In addition, switching figure comprises the type of judging vehicle velocity V 1 and judging among the output torque T1 at least one, and can comprise and adopt vehicle velocity V and output torque T _OUTIn any as parameter in advance the storage switching figure.

Above-mentioned speed change figure, switching figure or drive force source switching figure etc. can not store with the form of arteries and veins spectrogram, but to be used for the determine type that between current vehicle speed V and judgement vehicle velocity V 1, compares and to be used at output torque T _OUTAnd judge forms such as the determine type storage that compares between the output torque T1.In this case, switching control 50 places the step change state with speed-changing mechanism 10 when vehicle condition is judged vehicle velocity V 1 for for example current vehicle speed V surpasses.In addition, switching control 50 is the output torque T of for example automatic speed changing part 20 at vehicle condition _OUTSurpass when judging output torque T1 speed-changing mechanism 10 is placed the step change state.

When being used for making differential part 11 as the control unit et out of order of the electric system such as electrical motor of electric steplessly variable transmission work or functional defect, even be in stepless control area, switching control 50 also can preferentially place the step change state with speed-changing mechanism 10, moves continuously to guarantee vehicle.Here employed term " functional defect " is meant with relating to the first electrical motor M1 and produces the operation of electric energy and convert these electric energy the function deterioration of the relevant equipment of the electrical path of mechanical energy to, just owing to the first electrical motor M1, the second electrical motor M2, inverter 58, electrical storage device 60 and fault or function deterioration that the fault or the low temperature of the bang path of these component interconnects etc. is caused.

Above-mentioned drive-force-related value is the parameter that has one-to-one relationship with the propulsive effort of vehicle, and it can be the drive torque or the propulsive effort at drive wheel 38 places.In addition, it can be: the output torque T of automatic speed changing part 20 _OUT, engine output torque T _E, vehicle accekeration; Based on acceleration pedal operation angle or throttle _TH(or suction quantity, air/fuel ratio or fuel injection amount) and engine speed N _ECalculate such as engine output torque T _EAnd so on actual value; Or based on vehicle operators to the operational ton of acceleration pedal or throttle opening calculate such as engine output torque T _EOr the estimated valve of the vehicle drive force that needs and so on.Vehicular drive moment not only can be based on output torque T _OUTDeng and can calculate based on the speed ratio of differential gear mechanism and the radius of drive wheel 38, perhaps can directly detect by torque sensor etc.Be not always the case for each above-mentioned torque.

In addition, for example, if speed-changing mechanism 10 is placed in the stepless change state during running at high speed, consumption of fuel generation deterioration then.Therefore, in order to address this problem, vehicle velocity V 1 is configured to make that speed-changing mechanism 10 is placed in the step change state during running at high speed.In addition, if the first electrical motor M1 is configured to be provided at the reactive torque that changes on the scope of high output area of covering engine at vehicle during high output area travels, then the size of the first electrical motor M1 becomes bigger.In order to make the first electrical motor M1 miniaturization, judge that torque T1 is configured to depend on the characteristic of the first electrical motor M1, for example make the peak output of the electric energy that produces by the first electrical motor M1 reduce.

Fig. 8 shows the switching figure (switching arteries and veins spectrogram or relation) that is stored in advance in the memory storage 56.It has the driving engine output line of boundary line form, to allow switching control 50 according to comprising engine speed N _EWith motor torque T _EParameter still be that stepless control area carries out regional determination to having selected a grade control area.Switching control 50 can replace switching figure shown in Figure 6 based on engine speed N with reference to switching figure shown in Figure 8 _EWith motor torque T _ECome executable operations.

In other words, switching control 50 can be judged by engine speed N _EWith motor torque T _EThe vehicle condition of expression is in grade control area or stepless control area is arranged.In addition, Fig. 8 is the conceptual view that is used for dotted line shown in Figure 6.In other words, dotted line shown in Figure 6 is also represented based on graph of a relation shown in Figure 8 (arteries and veins spectrogram) according to comprising vehicle velocity V and output torque T _OUTThe shift cable that on two-dimensional coordinate, repaints of parameter.

Shown in the relation of Fig. 6, there is a grade control area to be configured to be positioned at wherein output torque T _OUTThe high torque (HT) zone that is higher than predetermined judgement output torque T1 perhaps is positioned at the high speed of a motor vehicle zone that vehicle velocity V wherein is higher than predetermined judgement vehicle velocity V 1.Therefore, in the higher speed of a motor vehicle zone of driving engine 8, realize the step change operation area with the high driving torque zone of higher torque operation or the speed of a motor vehicle.In addition, with the low driving torque zone of lower torque operation or hanging down in the speed of a motor vehicle zone of the speed of a motor vehicle, just in the common output area of driving engine 8, realize the stepless change operation area at driving engine 8.

Similarly, in the relation shown in Figure 8, the step change control area is configured to be positioned at wherein motor torque T _EGreater than the high torque (HT) zone of predetermined given value TE1, engine speed N wherein _EGreater than the high rotary speed area of predetermined given value NE1 or wherein based on motor torque T _EWith engine speed N _EThe driving engine output that calculates is greater than the high output area of given value.Therefore, under higher torque, higher rotation speed or the higher output of driving engine 8, realize the step change operation area.

Driving engine 8 than low torque, than slow speed of revolution or low output under, just in the common output area of driving engine 8, realize the stepless change operation area.There is being the boundary line between grade control area and the stepless control area to judge line and the height output operation judgement line that forms a series of high outputs operation decision contents among Fig. 8 corresponding to the high speed of a motor vehicle that forms a series of high speed of a motor vehicle decision contents.

According to such boundary line, when for example vehicle travelled under low/middling speed and low/middle output, speed-changing mechanism 10 was placed in the stepless change state, has fuel efficiency to guarantee vehicle.Surpass to judge the zone of running at high speed of vehicle velocity V 1 at actual vehicle speed V, speed-changing mechanism 10 is placed in the step change state, with as step change transmission work.At this moment, the output of driving engine 8 mainly is delivered to drive wheel 38 by the mechanical power bang path.This has suppressed the driving power that produces during as electric steplessly variable transmission when speed-changing mechanism 10 and the transition loss between the electric energy, thereby has improved consumption of fuel.

In addition, such as output torque T _OUTAnd so on drive-force-related value when surpass judging under the high output situation of driving engine of torque T1 vehicle ', speed-changing mechanism 10 is placed in the step change state as step change transmission.At this moment, the output of driving engine 8 mainly is delivered to drive wheel 38 by the mechanical power bang path.Therefore, electric steplessly variable transmission is moved in the operation area in the low/middling speed operation area and the low/middle output of vehicle.This causes having reduced the maxim of the electric energy that produced by the first electrical motor M1, just the maxim of the electric energy that is transmitted by the first electrical motor M1.Thus, can realize the first electrical motor M1 itself or comprise the further miniaturization of the vehicle drive unit of this parts.

In other words, be predetermined to be motor torque T as given value TE1 _ESwitching determination value when (it is used to judge that the first electrical motor M1 can bear reactive torque), at vehicle with motor torque T wherein _EDuring the high output torque of driving engine that is higher than given value TE1 travelled, differential part 11 was placed in the step change state.Therefore, for example when differential part 11 is in the step change state, the first electrical motor M1 does not need to bear and overcomes motor torque T _EReactive torque, can prevent that thus its size from increasing the deterioration that suppresses durability simultaneously.In other words, in accordance with the embodiments illustrated, the peak output of the first electrical motor M1 is less than motor torque T _EThe desired reactive torque capacity of maxim.That is to say that the output of the first electrical motor M1 makes motor torque T _EDesired reactive torque capacity can not surpass given value TE1, thereby can realize miniaturization.

In addition, the peak output of the first electrical motor M1 is a rated value, and it is to obtain by the experiment test under relevant environment for use.In addition, employed here term " motor torque T _EThe switching determination value " be meant and motor torque T _EThe cooresponding value of maxim or than the value of the low given level of maxim, it can make the first electrical motor M1 bear reactive torque.The switching determination value is the value that obtains by test in advance, is used to suppress the deterioration of the durability of the first electrical motor M1.

According to another viewpoint, when running at high speed, chaufeur has surpassed requirement to the unit of fuel travelled distance to the requirement of driving performance.Therefore, speed-changing mechanism 10 is switched to step change state (fixedly speed change state) rather than stepless change state, and it is for example shown in Figure 9 owing to the engine speed N that upgrades and produced that has in grade automatic speed changing operation area that this makes chaufeur to enjoy _EVariation, engine speed N just _ERhythm change.

Figure 10 illustrates an example of shifter 90, and it will switch in a plurality of shift position one by M/C.This shifter 90 comprises the cross side place that for example is configured in driver's seat and is manually actuated to select one the shifter bar (being changer lever) 92 in a plurality of shift position.This shifter bar 92 is optionally switched to Parking position " P (Parking) ", is used for the backward going position " R (oppositely) " of backward going, Neutral Position " N (neutral gear) ", travel activation point " D (driving) " and travel of activation point " M (manually) " of hand gear forward of automatic speed changing forward.In " P (Parking) " position, coupling device both such as first clutch C1 and second clutch C2 is not engaged, so that the interruption status of the power transfer path in the speed-changing mechanism 10 (just the automatic speed changing part 20) to be set, and the rotation of locking output shaft 22.In " N (neutral gear) " position, the power transfer path in the speed-changing mechanism 10 is interrupted.

For example, combine with the M/C of shifter bar 92 to each shift position, the hand valve that is mechanically connected in the hydraulic control circuit 42 on the shifter bar 92 is switched.Thus, hydraulic control circuit 42 is mechanically switched, and makes backing car gear " R ", Neutral Position " N " or the gear that advances " D " etc. shown in the joint start table set up Fig. 2.Shown in the joint start table of Fig. 2, each gear of from first to the 5th gear is to set up by the electric switching of the electromagnetic valve in the hydraulic control circuit 42 in " D " or " M " position.

Arrive in each shift position of " M " at " P ", at each the non-traveling-position place such as " P " and " N ", for example shown in the bonding operation table of Fig. 2, first clutch C1 and second clutch C2 disconnect or discharge.These are to be used for selecting the power transfer path of automatic speed changing part 20 wherein to be cut off non-activation point with state that can not powered vehicle.In other words, this is the power transfer path non-driven state that is cut off or interrupts by first clutch C1 and second clutch C2 wherein.

In addition, for example locate at each traveling-position " R ", " D " and " M ", shown in the joint start table of Fig. 2, at least one among first clutch C1 and the second clutch C2 is engaged.These are to be used for selecting the power transfer path of automatic speed changing part 20 wherein to be connected activation point with state that can powered vehicle.In other words, these are to be used for selecting the activation point of the transmit mode of power transfer path by one or two of first clutch C1 and second clutch C2.

Particularly, second clutch C2 by shifter bar 92 from " P " position or " N " position be engaged to the M/C of " R " position, make that the power transfer path in the automatic speed changing part 20 switches to power delivery status from the transmission of power interruption status.At least the M/C from " N " position to " D " position is engaged first clutch C1 by shifter bar 92, makes that the power transfer path in the automatic speed changing part 20 switches to power delivery status from the transmission of power interruption status.In addition, " D " position is the position of running at high speed most, and " 4 " in " M " position are the Jake brake scope that is used to obtain engine braking effect to " L ".

On longitudinal direction of car, " M " position is in identical position with " D " position, and on lateral direction of car, " M " position is adjacent with " D " position.Shifter bar 92 is operated into " M " position, is used for manually selecting above-mentioned position " D " to arrive " L " one.Particularly, for " M " position, upgrade position "+" and downshift position "-" are set on the fore-and-aft direction of vehicle.Shifter bar 92 being maneuvered to upgrade position "+" or downshift position "-" and arrives in " L " any one to select " D ".

For example, in the variable range of overall ratio γ T that can automatic guidance speed-changing mechanism 10, five speed ranges of from " D " to " L " that selects in " M " position are corresponding to the variety classes speed range of the overall ratio γ T of high-speed side (minimum speed ratio side) wherein.In addition, these five speed ranges limit the speed range (promptly interval) of shift position (gear), make it possible to control the maximum side shift position difference of automatic speed changing part 20 speed changes.

Shifter bar 92 passes through biased such as the biasing device of spring, thereby automatically turns back to " M " position from upgrade position "+" and downshift position "-".In addition, shifter 90 is provided with the shift position sensor (not shown), is used to detect each shift position of shifter bar 92.The shift position P of expression shifter bar 92 _SHBe output to electronic control package 40 with signal at the operation amount of " M " position.

If shifter bar 92 for example is operated into position " D ", then switching control 50 is according to the speed change arteries and veins spectrogram of storage in advance shown in Figure 6 or switch the automatic switchover control that the arteries and veins spectrogram implements to be used for the speed change state of speed-changing mechanism 10.In addition, hybrid power control setup 52 allows power splitting mechanism 16 to carry out stepless change control, and step change control setup 54 allows automatic speed changing part 20 to carry out automatic control of transmission.

For example, when vehicle therein speed-changing mechanism 10 be placed in when travelling under the step change transmission of step change state, for example in first to the 5th gear shown in Figure 2, carry out automatic control of transmission.In the variable range of the overall ratio γ T that in the range of infinitely variable speeds of power splitting mechanism 16, obtains, and carrying out to the fourth speed position under each gear that automatic control of transmission obtains from first by automatic speed changing part 20, speed-changing mechanism 10 carries out automatic control of transmission.Here used position " D " is meant the shift position that is used for automatic speed changing driving mode (automatic mode), and this automatic mode represents to be used for the control pattern that speed-changing mechanism 10 carries out automatic control of transmission.

In addition, if shifter bar 92 for example is operated into position " M ", then switching control 50, hybrid power control setup 52 and step change control setup 54 allow speed-changing mechanism 10 to carry out automatic control of transmission in the speed range of overall ratio γ T.When vehicle therein speed-changing mechanism 10 be switched to when travelling under the step change state of step change state, speed-changing mechanism 10 carries out automatic control of transmission in each speed range of overall ratio γ T.

When vehicle therein speed-changing mechanism 10 be switched to when travelling under the stepless change state of stepless change state, carry out automatic control of transmission in the scope of the overall ratio γ T that in each speed range, can realize, wherein depend on each speed range, can realize the stepless change speed ratio width and the scope that is used for each gear of automatic speed changing part 20 of power splitting mechanism 16.Here employed term position " M " also refers to the shift position of hand gear driving mode (manual mode), and it can selectedly be controlled to carry out hand gear at the control pattern that is used for speed-changing mechanism 10.

Thereby in accordance with the embodiments illustrated, speed-changing mechanism 10 (differential part 11, power splitting mechanism 16) can optionally be switched to stepless change state (differential state) and non-stepless change state (step change state, lock-out state).Especially, switching control 50 is judged differential part 11 speed change state of changing to be cut according to vehicle condition, and based on this, differential part 11 is optionally switched to stepless change state or non-stepless change state (step change state).

Under the step change state of differential part 11, hybrid power control setup 52 can not carry out the speed change of differential part 11 with the transmission synchronization ground of automatic speed changing part 20.In other words, this can be expressed as, according to the automatically controlled CVT function (differential operation) of the differential part 11 that realizes by hybrid power control setup 52, and engine speed N before and after speed change _EVariation be suppressed, just for example be maintained at predetermined value.Since this, in the step change state of differential part 11, when automatic speed changing part 20 speed changes, the rotational speed N of transferring elements 18 ₁₈Or engine speed N _EThere is level to change, causes the speed change impact thus.

In illustrated embodiment, during the speed change of automatic speed changing part 20, speed-changing mechanism 10 carries out speed change, minimizes the generation that speed change is impacted not only to be placed under the situation of stepless change state but also to be placed in differential part 11 under the situation of step change state in differential part 11.Hereinafter, will describe this variable speed operation in detail.

Return Fig. 5 now, when the carrying out of the speed change that determines automatic speed changing part 20, differential state determining apparatus 80 judges whether power splitting mechanism 16 are placed in the differential state, and just whether differential part 11 is placed in the stepless change state.Here used phrase " determines the carrying out of speed change " and is meant for example following situation: step change control setup 54 is treated speed change gear extremely based on vehicle condition by determining with reference to speed change figure shown in Figure 6 in the automatic speed changing part 20.

For example, based on by vehicle velocity V and output torque T _OUTThe vehicle condition of expression also passes through with reference to speed change figure shown in Figure 6, and according to whether being in the stepless control area that is used for speed-changing mechanism 10 is placed the stepless change state, differential state determining apparatus 80 judges whether differential parts 11 are placed in the stepless change state.Fig. 6 illustrates switching control 50 employed speed change figure, and it is used to judge that speed-changing mechanism 10 is placed in grade control area that has that is used to make speed-changing mechanism 10 controllably switch to the step change state and still is used to make speed-changing mechanism 10 controllably to switch to the stepless control area of stepless change state.

Make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, differential state determining apparatus 80 may determine differential part 11 and be placed in the stepless change state.In this case, hybrid power control setup 52 is carried out the speed change of differential parts 11, with for example with engine speed N _ERemain on the level of constant, make inertia phase at the speed-change process of automatic speed changing part 20, engine speed N _EChange continuously owing to the differential action (electric controlling stepless variable speed effect just) of differential part 11.For example, the hybrid power control setup 52 speed ratio γ that makes differential part 11 with the inertia phase of the speed-change process of automatic speed changing part 20 in change on the direction that changes in the opposite direction of speed ratio γ.

Inertia phase begins decision maker 82 and judges whether inertia phase begins in the speed-change process of automatic speed changing part 20.This judgement for example depends on the speed change whether step change control setup 54 determines automatic speed changing part 20, discharging the side engagement device when step change control setup 54 determines the speed change of automatic speed changing part 20 is released, the engage side coupling device begins to have the engagement torque capacity afterwards, and the thing followed is that the rotating speed of transferring elements 18 (the second electrical motor M2) begins to change.

For example, according to the following stated phenomenon, inertia phase begins the rotational speed N that decision maker 82 is judged the second electrical motor M2 _M2Whether, the engagement torque capacity of engage side coupling device in the speed-change process of the automatic speed changing part of being implemented by step change control setup 54 20 changes owing to beginning to increase.First kind of phenomenon depends on the actual speed N of transferring elements 18 ₁₈(the rotational speed N of the second electrical motor M2 just _M2) whether having changed given variable, this given variable is confirmed as being used to the fixed value of judging whether inertia phase begins in advance by experiment.

Second kind of phenomenon depends on and determines automatic speed changing part 20 at step change control setup 54 and whether passed through given time gap after carrying out speed change, and this time gap is confirmed as the engage side coupling device in advance by experiment and begins to have the required time of engagement torque capacity.In addition, whether the engagement hydraulic that the third phenomenon depends on the engage side coupling device arrives joint transition hydraulic pressure (instruction) value Pc, and this value Pc is confirmed as by experiment in advance making and begins to have hydraulic pressure (instruction) value of engagement torque capacity.

In addition, be placed in stepless change state following time in differential part 11, step change control setup 54 is carried out the speed change of automatic speed changing parts 20, to allow the input speed N of automatic speed changing part 20 _IN(be the rotational speed N of transferring elements 18 ₁₈) the given variation of realization.

More specifically, when step change control setup 54 makes automatic speed changing part 20 carry out speed change (speed change transition period), when differential state determining apparatus 80 judges that differential part 11 is placed in the stepless change state, activating pressure control setup 84 control activating pressures.In other words, the relevant control variable of speed change with automatic speed changing part 20 of activating pressure control setup 84 control coupling devices, this control variable are used in to treat to output in the hydraulic pressure command (speed change output) of hydraulic control circuit 42 to be used to carry out speed change by step change control setup 54 and make the rotational speed N of transferring elements 18 ₁₈Set up given variation.

Here the employed rotational speed N that is used for transferring elements 18 ₁₈Term " given variation " be meant by experiment the variable condition that obtains in advance, just for example given rate of change.In other words, this given variation is obtained in advance, to allow the rotational speed N of transferring elements 18 ₁₈Be positioned under the well-determined perfect condition of speed ratio γ with vehicle velocity V and automatic speed changing part 20, this given variation for example is the rotational speed N with transferring elements 18 ₁₈Percentum change N ₁₈' (=dN ₁₈/ dt) define.Change N at the rotating speed percentum ₁₈' think in the response of bigger speed change and obtain comfortable sensation, and change N at the rotating speed percentum ₁₈' think that easy inhibition speed change impacts in the less slow speed change response.

In addition, be placed in differential part 11 under the situation of step change state, step change control setup 54 makes automatic speed changing part 20 carry out speed change, to allow the rotational speed N of transferring elements 18 ₁₈Or engine speed N _ERealize given variation.

More specifically, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, when differential state determining apparatus 80 judges that differential part 11 is placed in the step change state, activating pressure control setup 84 control activating pressures.In other words, the relevant control variable of speed change with automatic speed changing part 20 of activating pressure control setup 84 control coupling devices, this control variable are used in to treat to output in the hydraulic pressure command (speed change output) of hydraulic control circuit 42 to be used to carry out speed change by step change control setup 54 and make the rotational speed N of transferring elements 18 ₁₈Or engine speed N _ESet up given variation.

Be similar to the rotational speed N of transferring elements 18 ₁₈, the employed here engine speed N that is used for _ETerm " given variation " be meant in advance the variable condition that obtains by experiment, just for example given rate of change.In other words, this given variation is obtained in advance, to allow engine speed N under the non-differential state of differential part 11 _EBe positioned under the well-determined perfect condition of speed ratio γ with vehicle velocity V and automatic speed changing part 20, this given variation for example is to use engine speed N _EPercentum change N _E' (=dN _E/ dt) define.Change N at the rotating speed percentum _E' think in the speed change response that increases and can obtain comfortable sensation, and change N at the engine speed percentum _E' think that easy inhibition speed change impacts in the slow speed change response that reduces.

Simultaneously, in illustrated embodiment, the automatic speed changing part 20 that makes at step change control setup 54 is carried out the on period of speed change, when differential part 11 is placed in the stepless change state, hybrid power control setup 52 allows differential part 11 to carry out speed change, to continuously change engine speed N before and after automatic speed changing part 20 speed changes _E, for example make engine speed N _ERemain on substantially invariable level.This has suppressed the generation of speed change impact and improved consumption of fuel is provided.

When this took place, marked change may take place in the expected value of overall ratio γ T before and after automatic speed changing part 20 speed changes.Even under these circumstances because overall ratio γ T changes continuously, so in case differential part 11 carry out speed change with before and after automatic speed changing part 20 speed changes with engine speed N _ERemain on substantially invariable level, then differential part 11 is further carried out speed change and is changed continuously to allow overall ratio γ T head for target overall ratio γ T.But in this case, the user can have more comfortable sensation than the situation that continuously changes overall ratio γ T when progressively (in discrete mode) changes overall ratio γ T, and has improved speed change response.

Carry out speed change in automatic speed changing part 20, wherein under the situation of the variation of vehicle velocity V shown in the transition a  b that is represented by solid line B among Fig. 6, before and after automatic speed changing part 20 speed changes, the variation that overall ratio γ T takes place is less or almost do not change.Therefore, favourable part is to minimize the speed change impact or improved consumption of fuel is provided, rather than has improved speed change response.

But, if automatic speed changing part 20 is carried out speed change, wherein for example because the pressing down fast or required output torque T that rapid release produces of acceleration pedal _OUTVariation shown in the transition c  d that represents by solid line C among Fig. 6, then before and after automatic speed changing part 20 speed changes, the rangeability of overall ratio γ T is than the vary within wide limits of overall ratio γ T when solid line B changes.Therefore, preferably progressively (in discrete mode) change overall ratio γ T responds to have improved speed change, rather than continuously changes overall ratio γ T to obtain minimized speed change impact and improved consumption of fuel is provided before and after automatic speed changing part 20 speed changes.

Therefore, if the rangeability of overall ratio γ T changes less or does not almost change before and after automatic speed changing part 20 speed changes, then overall ratio γ T can continuously change before and after speed change, impacts and improved consumption of fuel to obtain minimized speed change, rather than obtains improved speed change response.In addition, if the rangeability of overall ratio γ T significantly increases before and after automatic speed changing part 20 speed changes, then overall ratio γ T can jump over, so that the continuous variation of overall ratio γ T is interrupted before and after speed change, just, changes speed ratio step by step.

From another perspective, acceleration pedal pressed down fast or rapid release so that under the situation that the rangeability of overall ratio γ T significantly increases before and after automatic speed changing part 20 speed changes, concerning the user, have the so-called speed change (wherein overall ratio γ T jumps over step by step) of jumping over and seem it is very comfortable.Because previous reasons, the speed ratio γ that uses automatic speed changing part 20 have level to change the time overall ratio γ T preferably can jump over.

More specifically, step change control setup 54 be used to make automatic speed changing part 20 carry out the on period of speed change, when determining differential part 11, differential state determining apparatus 80 is placed in the speed change width of stepless change state and overall ratio γ T when big, except above-mentioned functions, hybrid power control setup 52 also carries out following control.In other words, the speed change that hybrid power control setup 52 allows 11 variations according to speed ratio γ of differential part to be synchronized with automatic speed changing part 20 changes speed ratio γ 0, and the continuous variation of overall ratio γ T does not take place.

Replace such operation, differential part 11 only is independent of the speed change of automatic speed changing part 20 and carries out speed change, just not with its transmission synchronization, change overall ratio γ T towards the expected value of overall ratio thus.This make the speed ratio that utilizes automatic speed changing part 20 have level to change the time overall ratio γ T head for target value is changed, change the level that has that is increased to such speed ratio with speed ratio and change (or deduct from it) differential part 11.This allows, and overall ratio γ T changes step by step before and after automatic speed changing part 20 speed changes, thereby causes the raising of speed change response.

For example, statement " rangeability of overall ratio γ T is bigger " is meant that the rangeability of target overall ratio γ T is pressed down fast owing to acceleration pedal or rapid release surpasses given variable shown in the transition c  d that is represented by solid line C among Fig. 6.This can be considered to wherein take place the so-called situation of jumping over speed change, and wherein overall ratio γ T changes in discrete mode (being great-jump-forward).Here employed term " given variable " is meant the value that obtains in advance by experiment, and it is considered to the user preferably makes target overall ratio γ T continuously change but (in discrete mode) change step by step.

Under the situation that determines the speed change of carrying out automatic speed changing part 20, for example as level speed-change control device 54 based on vehicle condition and by judging with reference to speed change figure shown in Figure 6 when treating extremely gear of speed change in the automatic speed changing part 20, speed ratio changes decision maker 86 and judges that overall ratio γ T exist and change.

Under the situation that determines the speed change of carrying out automatic speed changing part 20, acceleration pedal is pressed down dearly in the mode shown in the transition c  d that represents as solid line C among Fig. 6 or is discharged, and surpasses given variable with the rangeability that allows target overall ratio γ T.When this took place, speed ratio changed decision maker 86 and judges that whether existing overall ratio γ T wherein promptly to jump over the what is called that mode changes in discrete mode jumps over speed change.

Jump over speed change if speed ratio variation decision maker 86 determines not exist, then hybrid power control setup 52 is carried out the speed change of differential parts 11, makes to change engine speed N continuously before and after speed change _EOn the contrary, jump over speed change if determine to exist, then hybrid power control setup 52 speed change that is independent of automatic speed changing part 20 is carried out the speed change of differential part 11.

In addition, no matter speed ratio changes decision maker 86 and determines not exist and jump over speed change and still exist and jump over speed change, be placed in step change control setup 54 under the situation of stepless change state in differential part 11 and all carry out the speed change of automatic speed changing part 20, to allow the rotational speed N of transferring elements 18 ₁₈Realize given variation.

More specifically, be placed in the stepless change state if differential state determining apparatus 80 determines differential part 11, activating pressure control setup 84 as described below controls then are to allow the rotational speed N of transferring elements 18 ₁₈In the given variation of on period realization that is used to carry out automatic speed changing part 20 speed changes of step change control setup 54, judge the constraint that whether has the result of determination of jumping over speed change and be not subjected to speed ratio to change decision maker 86.In other words, be associated with the speed change of automatic speed changing part 20, carry out the activating pressure of work with the control coupling device, this activating pressure is used in from step change control setup 54 and outputs to the engagement command (speed change output) of hydraulic control circuit 42.

Thereby, be placed in non-stepless change state following time, the rotational speed N of transferring elements 18 in differential part 11 ₁₈With engine speed N _ESpeed ratio γ by vehicle velocity V and automatic speed changing part 20 determines uniquely.For this reason, the activating pressure of activating pressure control setup 84 control coupling devices is to allow the rotational speed N of transferring elements 18 ₁₈With engine speed N _ERealize given variation.But, when differential part 11 is placed in the stepless change state, engine speed N _EOwing to the differential action of differential part 11 is in free rotation state.Therefore, the activating pressure of coupling device is controlled such that the rotational speed N of the transferring elements of being determined uniquely by the speed ratio γ of vehicle velocity V and automatic speed changing part 20 18 ₁₈Realize given variation.

Torque descending control device 88 carries out work to reduce the torque that is delivered to drive wheel 38 to be passed.Such work comprises: the aperture of restraining electronic control throttle 94; Reduce to treat by Fuel Injection Device 96 supplied fuel amounts; And starting ignition device 98 is used to make the timing of ignition of driving engine 8 to postpone.So, according to being used to reduce motor torque T _EThe control that descends of the motor torque that carries out is delivered to torque (the input torque T of automatic speed changing part 20 for example of drive wheel 38 _INOr output torque T _OUT) reduce.In addition, torque descending control device 88 is additional to descend control or carry out the motor torque control that descends in mode independently of motor torque.

In motor torque descended control, the inverter 58 controls second electrical motor M2 was with the torque of interim generation reverse drive and allow the second electrical motor M2 to produce the reverse drive torque or be used for to electrical storage device 60 electrically-charged regenerative brake torques temporarily.This torque that causes being delivered to drive wheel 38 reduces.

Now, situation about being described below: switching control 50 switches to the step change state with differential part 11 (speed-changing mechanism 10), so that whole speed-changing mechanism 10 is as a grade automatic transmission with hydraulic torque converter is arranged.In this case,, then follow the generation that upgrades in the speed-change process, the input speed N of automatic speed changing part 20 if step change control setup 54 for example carries out upgrading of automatic speed changing part 20 _IN(be the rotational speed N of transferring elements 18 ₁₈) (in so-called inertia phase) changes.In inertia phase, follow engine speed N _EReduce, driving engine 8 releases energy temporarily.This torque that causes being delivered to drive wheel 38 produces torque increment, for example input torque T _INTorque increment or output torque T _OUTTorque increment (in so-called inertia torque).Such inertia torque causes taking place speed change to be impacted.

Replacedly, for example, if step change control setup 54 carries out the speed change of automatic speed changing part 20, inertia phase takes place in speed-change process then.This causes second rotating element RE2 of differential part 11 or the rotating speed of the 3rd rotating element RE3 to reduce, and/or the rotating speed of at least one reduces among the 4th rotating element RE4 to the eight rotating element RE8 of automatic speed changing part 20.Owing to show as the inertia torque of the torque increment in the torque that is delivered to drive wheel 38, cause to take place speed change and impact.

Situation about being described below: speed-changing mechanism 10 is switched to the stepless change state to switching control 50 so that whole speed-changing mechanism 10 is used as the stepless change part.In this case, step change control setup 54 carries out the speed change of automatic speed changing part 20.This allows hybrid power control setup 52 to carry out the speed change of differential part 11, and in this speed-change process, engine speed N _EAlmost do not change or engine speed N _EVariation be minimized.Differential part 11 is carried out speed change makes that the overall ratio γ T of speed-changing mechanism 10 does not change before and after automatic speed changing part 20 speed changes, and perhaps this variation is minimized and makes it continuous.

But, even in this case, owing to carried out the speed change of automatic speed changing part 20, so inertia phase in speed-change process, occurred.When this takes place, increase the generation inertia torque as the torque in the torque that is delivered to drive wheel 38.Owing to the inertia torque that causes as the torque increment in the torque that is delivered to drive wheel 38, cause to take place speed change and impact.Follow the second and the 3rd rotating element RE2 of differential part 11 and the rotating speed of RE3 to reduce, and/or the rotating speed of at least one rotating element reduces among the rotating element of the 4th rotating element RE4 to the eight rotating element RE8 of formation automatic speed changing part 20, and torque increment is transmitted.

Therefore, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, torque descending control device 88 reduces the torque that is delivered to drive wheel 38 to be passed, for example the input torque T of automatic speed changing part 20 _INOr output torque T _OUTEspecially, control and motor torque decline control separately or in conjunction with carrying out by motor torque decline for torque descending control device 88, reduces the torque that is delivered to drive wheel 38 to be passed thus.This be because corresponding to the torque increment of inertia torque at input torque T _INOr output torque T _OUTIn be eliminated to a certain extent, be used to suppress because the speed change that causes of inertia torque is impacted.Inertia phase in automatic speed changing part 20 speed-change processes, in the synchro control of hybrid power control setup 52 beginning differential parts 11, torque descending control device 88 can be delivered to the reducing of torque of drive wheel 38.

In addition, replace above-mentioned functions or be additional to above-mentioned functions, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, torque descending control device 88 is used to reduce the work of the torque that is delivered to drive wheel 38.The fluctuation that this has eliminated torque causes that coupling device is used to minimize joint impact to a certain extent by full engagement in automatic speed changing part 20.

Like this, torque descending control device 88 reduces input torque T _INThereby, suppressed the speed change impact.Carry out input torque T _INThis reducing, the inertia torque that (this fluctuation because automatic speed changing speed change partly cause) cause that fluctuates to eliminate rotating speed by the rotating element that forms automatic speed changing part 20, and elimination and fluctuate by the rotating speed of the interior rotating element of differential part 11 and (to comprise engine speed N _EFluctuation) the corresponding torque increment of inertia torque that causes.Parallel or independent with it with this operation, the torque fluctuation that is caused by the full engagement of coupling device in the automatic speed changing part 20 is eliminated to a certain extent, impacts to suppress speed change.

In addition, except above-mentioned functions, hybrid power control setup 52 can have following function: as rotating control assembly, be used to use the first electrical motor M1 and/or the second electrical motor M2 to come energetically (forcibly) to change the rotational speed N of transferring elements 18 ₁₈This is because make automatic speed changing part 20 carry out the on period of speed change, the rotational speed N of transferring elements 18 at step change control setup 54 ₁₈Realized given variation.

Sometimes, the rotational speed N of transferring elements 18 ₁₈Change along with the speed change of automatic speed changing part 20, this speed change begins by the activating pressure with 84 controls of activating pressure control setup, to allow the rotational speed N of transferring elements 18 ₁₈Realize given variation.Opposite with this effect, illustrated embodiment can make the rotational speed N of transferring elements 18 ₁₈More approaching given variation.

Here, relevant with the speed change of automatic speed changing part 20, the activating pressure of activating pressure control setup 84 control coupling devices, this activating pressure is used in to be treated to output in the hydraulic pressure command (speed change output) of hydraulic control circuit 42 by step change control setup 54.This is because the on period that makes automatic speed changing part 20 carry out speed change at step change control setup 54 is placed under the situation of stepless change state the rotational speed N of transferring elements 18 in differential part 11 ₁₈Realize given variation, perhaps be placed under the situation of non-stepless change state engine speed N in differential part 11 _ERealize given variation.

Activating pressure control setup 84 carries out work, for example to realize given variation by the activating pressure of study coupling device.As mentioned above, be placed in differential part 11 under the situation of stepless change state, since the differential action of differential part 11, engine speed N _ERemain under the free rotation state.Be placed in differential part 11 under the situation of stepless change state, the activating pressure of activating pressure control setup 84 study coupling devices is to allow the rotational speed N of transferring elements 18 ₁₈(determining with the speed ratio γ of vehicle velocity V and automatic speed changing part 20 is unique) realizes given variation.Below will describe the work that is used to learn activating pressure of activating pressure control setup 84 in detail.

Activating pressure control setup 84 comprises: activating pressure learning control device 100, and it is as being used to learn the activating pressure of coupling device to realize the activating pressure learning control device of given variation; Learning control decision maker 102, it is used to judge the activating pressure of whether learning coupling device; With learning value selecting arrangement 104, the learning value of the coupling device activating pressure that its speed change that is used for being chosen in automatic speed changing part 20 is used.So, the speed change result of automatic speed changing part 20 is learnt, and the next on-cycle activating pressure that is used for of automatic speed changing part 20 is corrected, and wherein correction is stored as the hydraulic pressure learning value arteries and veins spectrogram about the coupling device activating pressure (control variable learning value arteries and veins spectrogram) as shown in figure 11.

Figure 11 illustrates the example of hydraulic pressure learning value arteries and veins spectrogram, and it is divided into upgrade the arteries and veins spectrogram and the arteries and veins spectrogram that lowers category, and wherein Figure 11 A illustrates the arteries and veins spectrogram that upgrades, and Figure 11 B illustrates the arteries and veins spectrogram that lowers category.Hydraulic pressure learning value arteries and veins spectrogram shown in Figure 11 is divided into grade (to distinguish) based on the amplitude 1 to 7 of motor torque respectively, and comprises each hydraulic pressure learning value that is respectively applied for the speed change kind such as " 1 grade → 2 grades " and " 2 grades → 3 grades ".

For example, in motor torque upgraded for " 1 grade → 2 grades " of " 1 ", the hydraulic pressure learning value that discharges the side engagement device was " Pb3u121 ", and the hydraulic pressure learning value of engage side coupling device is " Pb2u121 ".In addition, the obtained default value of hydraulic pressure learning value arteries and veins spectrogram as each hydraulic pressure learning value, these hydraulic pressure learning value be obtain in advance by test and for example be stored in the memory storage 56, advancing of the study of carrying out along with activating pressure learning control device 100, default value is write the hydraulic pressure learning value again.Based on the engine speed N that obtains in advance by experiment _E(it is for example with throttle _THChange as parameter) and the motor torque T that estimates _E' between relation, the 100 calculation engine torques of activating pressure learning control device.This calculates the throttle based on reality _THWith engine speed N _EAnd carry out.

Speed change completion determination device 106 judges whether step change control setup 54 finishes the speed change of automatic speed changing part 20.Such judgement depends on the given speed change time that obtains by experiment in advance of whether having passed through automatic speed changing part 20, perhaps the actual speed N of transferring elements 18 ₁₈Whether with speed change after the rotational speed N of transferring elements 18 ₁₈(that is, by the rotational speed N of the well-determined transferring elements 18 of speed ratio γ of automatic speed changing part 20 after vehicle velocity V and the speed change ₁₈) synchronously.

The study precondition is set up decision maker (promptly setting up decision maker) 108 and is judged whether the study precondition of activating pressure learning control device 100 study activating pressures is set up.For example, whether establishment decision maker 108 normally carries out according to speed change and finishes and judge under certain condition whether the study precondition is set up, and described certain condition comprises: the fluctuation of motor torque falls into given scope in the speed change of automatic speed changing part 20; The Engine Coolant Temperature TEMPw of driving engine 8 represents that the warming-up of driving engine 8 finishes; And the power fluid temperature of automatic speed changing part 20 falls into predetermined desired value.Here employed expression " motor torque fluctuation given range " is meant predetermined decision content, and the motor torque during its expression speed change appears in the arbitrary grade shown in the motor torque 1 to 7 in the hydraulic pressure learning value arteries and veins spectrogram shown in Figure 11.

Make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, when differential part 11 was placed in the stepless change state, activating pressure learning control device 100 monitored the actual speed N of transferring elements 18 ₁₈Variation.Replacedly, when differential part 11 was placed in non-stepless change state, activating pressure learning control device 100 monitored the actual speed N of transferring elements 18 during the speed change of automatic speed changing part 20 ₁₈Perhaps practical engine speeds N _EVariation, be used for comparing with given variation.

In addition, activating pressure learning control device 100 is carried out learning control, is used to revise the activating pressure of coupling device, minimizes with the actual change that makes rotating speed in variable speed operation subsequently and the difference between the given variation.In other words, activating pressure learning control device 100 is regulated, and increasing or to reduce at the activating pressure that is right after the coupling device that uses in variable speed operation before, thereby realizes given variation in the cycle in speed change subsequently.In addition, activating pressure learning control device 100 allows that hydraulic pressure value (it is as the object of study) corresponding to motor torque in the speed-change process and variable speed type is written as activating pressure (the regulating the back) hydraulic pressure afterwards that is corrected based on current learning control again in the hydraulic pressure learning value arteries and veins spectrogram shown in Figure 11, is used to be stored as new learning value.

Make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, sometimes, utilize the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 as the hybrid power control setup 52 of rotating control assembly ₁₈, to realize given variation.In this case, activating pressure learning control device 100 is forbidden the activating pressure of coupling device is learnt, and does not carry out learning manipulation.

In other words, use the rotational speed N of the first electrical motor M1 and/or the second electrical motor M2 forcibly changing transferring elements 18 ₁₈Allow the rotational speed N of transferring elements 18 ₁₈Mode with more approaching given variation changes.This causes the learning value of activating pressure in the learning control of being undertaken by activating pressure learning control device 100 to have the correction that reduces.This is to consider, in the rotational speed N of not using the first electrical motor M1 and/or the second electrical motor M2 forcibly changing transferring elements 18 ₁₈Situation under, use such learning value to carry out the actual speed N that speed change causes transferring elements 18 ₁₈Variation and the difference between the given variation increased following amount, this amount is to use the first electrical motor M1 and/or the second electrical motor M2 to force the variable that increases.Owing to this reason, in the rotational speed N of using the first electrical motor M1 and/or the second electrical motor M2 forcibly changing transferring elements 18 ₁₈The time, activating pressure learning control device 100 is not learnt the activating pressure of coupling device.

Replacedly, make automatic speed changing part 20 carry out the on period of speed change, use the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 as the hybrid power control setup 52 of rotating control assembly at step change control setup 54 ₁₈, to realize given variation, in this process, activating pressure learning control device 100 carries out control as described below.Replacement is learnt the activating pressure of coupling device, and activating pressure learning control device 100 is in the rotational speed N of considering the transferring elements 18 that the use first electrical motor M1 and/or the second electrical motor M2 change ₁₈The basis on study coupling device activating pressure.

In other words, be similar to situation the about activating pressure of coupling device not being learnt, in the rotational speed N of not using the first electrical motor M1 and/or the second electrical motor M2 to come forcibly changing transferring elements 18 ₁₈Situation under, if use such learning value to carry out speed change, then produce problem as described below.Such problem is the actual speed N of transferring elements 18 ₁₈Variation and the difference between the given variation owing to the pressure change component of using the first electrical motor M1 and/or the second electrical motor M2 to cause increases.Rotational speed N along with transferring elements 18 ₁₈Owing to using the first electrical motor M1 and/or the second electrical motor M2 to force to change, activating pressure learning control device 100 permissions (in other words, by deducting such pressure change component) on the basis of considering such pressure change component are learnt the activating pressure of coupling device.

In illustrated embodiment, depend on whether differential part 11 is placed in the stepless change state when step change control setup 54 makes automatic speed changing part 20 carry out speed change, perhaps overall ratio γ T changes continuously or changes with the jump gear shift mode when differential part 11 is placed in the stepless change state, and speed-changing mechanism 10 has three kinds of states under the pattern.

When from automatic speed changing part 20 observation driving engines 8, in the speed-change process of automatic speed changing part 20, according to the stepless change state or the non-stepless change state of differential part 11, inertial mass adopts different values in speed change.Under the stepless change state, the rotational speed N of transferring elements 18 ₁₈Because differential action and freely changing, and be not subjected to the rotational speed N of transferring elements 18 ₁₈The constraint of variation.Under non-stepless change state, make engine speed N _ERotational speed N along with transferring elements 18 ₁₈Variation and change.In other words, when differential part 11 is placed in non-stepless change state, compare when being placed in the stepless change state, along with engine speed N with differential part 11 _EVariation, inertial mass during the speed change increases.

When differential part 11 was placed in the stepless change state, change still continuously according to overall ratio γ T overall ratio γ T changed engine speed N with the jump gear shift mode _EDiffer from one another with the change in rotational speed amplitude of the turning unit that forms differential part 11.(this moment engine speed N when overall ratio γ T changes with the jump gear shift mode _EVariation bigger), (rotational speed N of the first electrical motor M1 for example at this moment, when changing continuously with overall ratio γ T _M1Variation is to suppress engine speed N _EVariation) compare, sometimes inertia torque is bigger.

Think that thus in order to realize given variation, the activating pressure of the coupling device of formation automatic speed changing part 20 has different values according to three kinds of patterns of the state of speed-changing mechanism 10.Thereby, in the speed-change process of automatic speed changing part 20, need activating pressure learning control device 100 on any relevant basis in the state of considering speed-changing mechanism 10 and the three kinds of patterns, activating pressure to be carried out learning control.

For this reason, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, whether be placed in the stepless change state based on differential part 11, activating pressure learning control device 100 is distinguished the hydraulic pressure learning value of coupling device activating pressure.In addition, during the speed change of automatic speed changing part 20, when differential part 11 is placed in the stepless change state, belong to the continuous variation speed change of still jumping based on the speed change of overall ratio γ T, activating pressure learning control device 100 is distinguished the hydraulic pressure learning value of coupling device activating pressures.

For example, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, the variation that is placed in stepless change state and overall ratio γ T in differential part 11 belongs under the continually varying situation, and activating pressure learning control device 100 is pattern " A " with the learning value arrangement of current generation.In addition, the variation that is placed in stepless change state and overall ratio γ T in differential part 11 belongs under the situation of jump speed change, and activating pressure learning control device 100 is pattern " B " with the learning value arrangement of another current generation.

In addition, be placed in differential part 11 under the another kind of situation of non-stepless change state, activating pressure learning control device 100 is pattern " C " with the learning value arrangement of another current generation.As a result, under three kinds of patterns of speed-changing mechanism 10, pattern " A ", " B " and " C " are stored as hydraulic pressure learning value arteries and veins spectrogram as shown in figure 11 when automatic speed changing part 20 is carried out speed change.

The hydraulic pressure learning value arteries and veins spectrogram of pattern " A ", " B " and " C " has by the default value that is used for pattern " A ", " B " and " C " of original storage, carry out learning control based on this default value, default value is write again relevant learning value and with its storage.The default value of pattern " A ", " B " and " C " is to determine by experiment in advance on the basis of considering the state of speed-changing mechanism 10 in its speed-change process.

For example, be configured to make that with the default value in the non-stepless change state of differential part 11 (this moment, inertial mass increased in speed-change process) the corresponding pattern " C " hydraulic pressure of engage side coupling device is higher than the hydraulic pressure of pattern " A " and " B " middle engage side coupling device, pattern " A " and " B " are corresponding to the stepless change state of differential part 11.This allows, and the engage side coupling device has suitable engagement torque capacity in the speed-change process of automatic speed changing part 20.In addition, be configured to make that with the default value in the overall ratio γ T that belongs to the jump speed change (this moment, inertia torque in speed-change process may increase) the corresponding pattern " B " hydraulic pressure of engage side coupling device further is higher than the hydraulic pressure of engage side coupling device in the pattern " A ", pattern " A " is corresponding to belonging to continually varying overall ratio γ T.

Like this, respectively at three kinds of patterns of speed-changing mechanism 10 in the speed-change process of automatic speed changing part 20, activating pressure learning control device 100 with the arrangement of hydraulic pressure learning value arteries and veins spectrogram for pattern " A ", " B " and " C " and with its storage.From another perspective, in the speed-change process of automatic speed changing part 20, relevant according in the state of speed-changing mechanism 10 and the three kinds of patterns which kind of, the coupling device of automatic speed changing part 20 need have different activating pressures.Therefore, activating pressure learning control device 100 is respectively at the different activating pressures of three kinds of pattern learning coupling devices of speed-changing mechanism 10, to obtain to be respectively applied for the hydraulic pressure learning value arteries and veins spectrogram of pattern " A ", " B " and " C " respectively at three kinds of patterns of speed-changing mechanism 10.Like this, learning method that we can say the hydraulic pressure learning value of coupling device activating pressure changes according to three kinds of patterns of speed-changing mechanism 10.

In other words, need learn based on prerequisite separately: a prerequisite is that differential part 11 is placed in the stepless change state at least for pattern to be learnt " A " or " B "; Another prerequisite is for pattern to be learnt " C ", and differential part 11 is placed in non-stepless change state at least.Therefore, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, whether be placed in the stepless change state according to differential part 11, activating pressure learning control device 100 changes the learning method of the hydraulic pressure learning value of coupling device activating pressure.

In addition, for pattern to be learnt " A ", the prerequisite of learning is that differential part 11 is placed in the stepless change state at least, and the variation of overall ratio γ T belongs to stepless variation.In addition, for pattern to be learnt " B ", the prerequisite of learning is that differential part 11 is placed in the stepless change state at least, and the variation of overall ratio γ T belongs to discontinuous variation (speed change of promptly jumping).For this reason, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, when differential part 11 is placed in the stepless change state, belong to the continuous variation speed change of still jumping according to the variation of overall ratio γ T, activating pressure learning control device 100 changes the learning method of the hydraulic pressure learning value of coupling device activating pressures.

Make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, based on the state of speed-changing mechanism 10 in the speed-change process of automatic speed changing part 20, the hydraulic pressure learning value that pattern " A ", " B " and " C " were put and be stored as to 104 selections of learning value selecting arrangement in order by activating pressure learning control device 100.Simultaneously, based on motor torque T _EWith the speed change kind, activating pressure learning control device 100 is chosen in the learning value of the coupling device activating pressure that uses in the automatic speed changing part 20.

But following situation is a N/R: 100 pairs in activating pressure learning control device is used for whole predetermined default values of the hydraulic pressure learning value arteries and veins spectrogram on pattern " A ", " B " and " C " and learns.Consider this, if learning value selecting arrangement 104 selects also not pass through the learning value of the default value of study as the coupling device activating pressure, then activating pressure learning control device 100 is revised relevant default value based on the learning value of having learnt (in different hydraulic pressure learning value arteries and veins spectrograms, this green phase motor torque is together distinguished with the gear type).Below, will such control action be described with reference to three kinds of patterns of the speed-changing mechanism 10 that in the speed-change process of automatic speed changing part 20, is initialised.

In the speed-change process of automatic speed changing part 20, sometimes, the hydraulic pressure study arteries and veins spectrogram (pattern " A " or pattern " B ") that uses in the differential part 11 under being placed in the stepless change state belongs to the not default value " A " of study, and the hydraulic pressure that uses in the differential part 11 under being placed in non-stepless change state study arteries and veins spectrogram (pattern " C ") belongs to learning value " C ".In this case, the learning value " C " that obtains based on the study under non-stepless change state, activating pressure learning control device 100 is revised the default value " A " that is used for the stepless change state.

On the contrary, in the speed-change process of automatic speed changing part 20, sometimes, the hydraulic pressure study arteries and veins spectrogram (pattern " C ") that uses in the differential part 11 under being placed in non-stepless change state belongs to the not default value " C " of study, and the hydraulic pressure that uses in the differential part 11 under being placed in stepless change state study arteries and veins spectrogram (pattern " A " or pattern " B ") belongs to learning value " A ".In this case, the learning value " A " that obtains based on the study under the stepless change state, activating pressure learning control device 100 is revised the default value " C " that is used for non-stepless change state.

Like this, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, whether be placed in the stepless change state based on differential part 11, activating pressure learning control device 100 changes the learning method of the hydraulic pressure learning value of coupling device activating pressure.

In addition, in the speed-change process of automatic speed changing part 20, sometimes, belong to the not default value " A " of study at the hydraulic pressure study arteries and veins spectrogram (pattern " A ") that differential part 11 is placed under the stepless change state and the variation of overall ratio γ T is used when belonging to continuous the variation, and belong to learning value " B " at the hydraulic pressure study arteries and veins spectrogram (pattern " B ") that differential part 11 is placed under the stepless change state and the variation of overall ratio γ T is used when belonging to the jump speed change.In this case, based on the learning value " B " that obtains by study, activating pressure learning control device 100 is revised default value " A ".

On the contrary, in the speed-change process of automatic speed changing part 20, sometimes, belong to the not default value " B " of study at the hydraulic pressure study arteries and veins spectrogram (pattern " B ") that differential part 11 is placed under the stepless change state and the variation of overall ratio γ T is used when belonging to the jump speed change, and belong to learning value " A " at the hydraulic pressure study arteries and veins spectrogram (pattern " A ") that differential part 11 is placed under the stepless change state and the variation of overall ratio γ T is used when belonging to continuous the variation.In this case, based on the learning value " A " that obtains by study, activating pressure learning control device 100 is revised default value " B ".

Like this, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, the variation that whether is placed in stepless change state and overall ratio γ T based on differential part 11 belongs to the continuous variation speed change of still jumping, and activating pressure learning control device 100 changes the learning method of the hydraulic pressure learning value of coupling device activating pressures.

More specifically, based on the default value that is used for hydraulic pressure learning value Pb3u121 and Pb2u121 " B " (it is to upgrade and distinguish at " 1 grade → 2 grades " of the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " B " by motor torque 1), activating pressure learning control device 100 is revised the default value " A " (it is to upgrade and distinguish at " 1 grade → 2 grades " of the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " A " by motor torque 1) that is used for hydraulic pressure learning value Pb3u121 and Pb2u121.

For example, if learning value " B " has the trend to the correction of underlap side, then activating pressure learning control device 100 to certain increment, and is stored as learning value " A " with revised default value " A " to underlap side correction default value " A ".On the contrary, if learning value " B " has the trend to the correction of lap over side, then activating pressure learning control device 100 to certain increment, and is stored as learning value " A " with revised default value " A " to lap over side correction default value " A ".In other words, can not simply compare, distinguish with identical gear type with identical motor torque among pattern " A ", " B " and " C " because the hydraulic pressure value is original.Like this, according to the study trend of default value " B " being revised the predetermined percentage of default value in learning value " B ".

Learning value selecting arrangement 104 is chosen as learning value " A " learning value for the treatment of the coupling device activating pressure that uses in the speed change of automatic speed changing part 20.In addition, if do not learn (not revising by 100 couples of default value A of activating pressure learning control device) in different hydraulic pressure learning value arteries and veins spectrograms, then default value " A " intactly is chosen as the learning value of the coupling device activating pressure that uses in the speed change of automatic speed changing part 20.

Like this, activating pressure learning control device 100 is used for revising indirectly based on the learning method that the learning value of having learnt is revised the hydraulic pressure learning value of default value the activating pressure of coupling device.This correction is that the learning method (wherein the activating pressure of coupling device is directly revised, to suppress the actual change of rotating speed and the difference between the given variation in variable speed operation subsequently) that is independent of the hydraulic pressure learning value is carried out.In other words, we can say, according to based on actual speed change to the direct correction of activating pressure with based on of the indirect correction of other learning value to activating pressure, activating pressure learning control device 100 changes the learning method of the hydraulic pressure learning value of coupling device activating pressures.

Learning control decision maker 102 judges whether activating pressure learning control devices 100 have learnt to be used for each default value on each hydraulic pressure learning value arteries and veins spectrogram of pattern " A ", " B " and " C ".This judgement belongs to following judgement, that is: the activating pressure learning control device 100 hydraulic pressure value that whether will be used for each hydraulic pressure learning value arteries and veins spectrogram of pattern " A ", " B " and " C " writes learning value again.

The diagram of circuit of Figure 12 illustrates the main portion of the Control work of being carried out by electronic control package 40, just the variable speed control work of being carried out by speed-changing mechanism 10.This treating process repeated with the extremely short cycle (about several milliseconds to a few tens of milliseconds magnitude).The time diagram of Figure 13 illustrates the Control work of diagram of circuit shown in Figure 12 representative, and it is illustrated under the situation that differential part 11 is placed in the stepless change state, when carry out the Control work that " 2 grades → 3 grades " are carried out when upgrading in automatic speed changing part 20.The time diagram of Figure 14 illustrates the Control work of diagram of circuit shown in Figure 12 representative, and it is illustrated under the situation that differential part 11 is placed in the stepless change state, slides the Control work of carrying out when lowering category when carry out " 3 grades → 2 grades " in automatic speed changing part 20.

The time diagram of Figure 15 illustrates the Control work of diagram of circuit representative shown in Figure 12, it is illustrated under the situation that differential part 11 is placed in the stepless change state, connects the Control work of carrying out when lowering category when carry out " 3 grades → 2 grades " power with the jump gear shift mode in automatic speed changing part 20.The time diagram of Figure 16 illustrates the Control work of diagram of circuit shown in Figure 12 representative, and it is illustrated under the situation that differential part 11 is placed in step change state (lock-out state), when carry out the Control work that " 2 grades → 3 grades " are carried out when upgrading in automatic speed changing part 20.The time diagram of Figure 17 illustrates the Control work of diagram of circuit representative shown in Figure 12, it is illustrated under the situation that differential part 11 is placed in step change state (lock-out state), slides the Control work of carrying out when lowering category when carry out " 3 grades → 2 grades " in automatic speed changing part 20.

At first, with step change control setup 54 cooresponding step S1 in, judge in the automatic speed changing part 20 whether carry out speed change.This judgement depend on treat in the automatic speed changing part 20 speed change to gear whether be based on output torque T by vehicle velocity V and automatic speed changing part 20 _OUTThe vehicle condition of expression is for example determined by reference speed change figure shown in Figure 6.

Moment t1 among Figure 13 and the moment t1 among Figure 16 have represented to judge that " 2 grades → 3 grades " in the automatic speed changing part 20 upgrade.In addition, moment t1 among Figure 14 and the moment t1 among Figure 17 have represented to judge that " 3 grades → 2 grades " in the automatic speed changing part 20 lower category.

In step S1, make under the situation of sure judgement, then, with differential state determining apparatus 80 cooresponding step S2 in, judge whether power splitting mechanism 16 is placed in the differential state, just whether differential part (stepless change part) 11 is placed in the stepless change state.Whether this for example judges by with reference to speed change figure shown in Figure 6, be in based on vehicle condition to make speed-changing mechanism 10 place the stepless change control area of stepless change state and carry out.

If making at step S2 negates to judge, then with step change control setup 54 cooresponding step S9 in, gear-shift command (hydraulic pressure command) is output to hydraulic control circuit 42, treats the gear that speed change arrives with speed change in step S1 to the automatic speed changing part of judging 20.Based on the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " C " of study and storage, learning value selecting arrangement 104 is chosen in the hydraulic pressure that uses in such hydraulic pressure command, makes the rotational speed N of in speed-change process transferring elements 18 ₁₈Realize given variation or engine speed N _ERealize given variation.

The timing that moment t1 among Figure 16 is expressed as follows: at this moment, remain in differential part 11 under the situation of lock-out state, automatic speed changing part 20 speed changes to the gear-shift command of third gear is output, to begin to reduce release hydraulic pressure P as the second drg B2 that discharges the side engagement device _B2

In the time period from t1 to t3, as the engagement hydraulic P of the first drg B1 of engage side coupling device _B1Raise, at moment t3, the joint action of the first drg B1 is finished, to finish a series of variable speed operations.As shown in the figure, the learning value that being used for of selecting in the hydraulic pressure learning value of use from pattern " C ", " 2 grades → 3 grades " upgraded preestablishes the transition hydraulic pressure that discharges the side engagement device and the transition hydraulic pressure in the engage side coupling device, makes the rotational speed N of transferring elements 18 ₁₈Realize given variation, perhaps engine speed N _ERealize given variation.

In the embodiment shown in Figure 16, remain in differential part 11 under the situation of lock-out state and carry out speed change, make speed-changing mechanism 10 on the whole as step change transmission.Therefore, in the process that upgrades as shown in the figure, under vehicle velocity V keeps constant situation, follow engine speed N _EReduce, make the input speed N of automatic speed changing part 20 _IN(the rotational speed N of transferring elements 18 ₁₈) reduce.Remain on shown in the embodiment as shown under the situation of lock-out state in differential part 11, be synchronized with inertia phase basically since moment t2, can use the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 energetically ₁₈And/or engine speed N _ESo that it is near given variation.

The timing that moment t1 among Figure 17 is expressed as follows: at this moment, remain in differential part 11 under the situation of lock-out state, the gear-shift command that makes automatic speed changing part 20 set up second gear is output, and conduct discharges the engagement hydraulic P of the first drg B1 of side engagement device _B1Begin to descend.In the time period from t1 to t4, as the engagement hydraulic P of the second drg B2 of engage side coupling device _B2Raise, at moment t4, the joint action of the second drg B2 is finished, to finish a series of variable speed operations.As shown in the figure, the learning value that being used for of selecting in the hydraulic pressure learning value of use from pattern " C ", " 3 grades → 2 grades " lowered category preestablishes the transition hydraulic pressure that discharges the side engagement device and the transition hydraulic pressure in the engage side coupling device, makes the rotational speed N of transferring elements 18 ₁₈Realize given variation, perhaps engine speed N _ERealize given variation.

For example, as shown in figure 17, when the engage side coupling device begins to be supplied hydraulic pressure, export high hydraulic pressure command at high speed and fill actuating oil, thus the back clearance of rapid constriction engage side coupling device.Like this, if coupling device keeps engaging with high hydraulic pressure always, then in engaging process, impact sometimes.Consider this possibility, engaging the moment output low voltage value instruction of beginning, the hydraulic pressure value instruction that output afterwards increases the target hydraulic value of hydraulic pressure value when joint is finished gradually.

In addition, in the embodiment shown in Figure 17, because differential part 11 is carried out speed change under lock-out state, institute is so that speed-changing mechanism 10 is used as step change transmission on the whole.Therefore, as shown in the figure, under vehicle velocity V keeps constant situation, make the input speed N of automatic speed changing part 20 _IN(the rotational speed N of transferring elements 18 ₁₈) and engine speed N _EIncrease along with the generation that lowers category.In addition, remain on shown in the embodiment as shown under the situation of lock-out state, be synchronized with inertia phase basically since moment t2, can use the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 energetically in differential part 11 ₁₈And/or engine speed N _ESo that it is near given variation.

But, if in step S2, make sure judgement, then changing among the decision maker 86 corresponding step S3 with speed ratio, whether judge that acceleration pedal is depressed dearly or discharged shown in the transition " c  d " that the solid line C among Fig. 6 represents.This makes overall ratio γ T have the rangeability bigger than given value.Therefore, judge whether the variation of overall ratio γ T belongs to discontinuous variation, just the overall ratio γ T what is called jump speed change of jumping step by step.

If make sure judgement at step S3, then with step change control setup 54 cooresponding step S4 in, make automatic speed changing part 20 speed changes to being output to hydraulic control circuit 42 in the gear-shift command (hydraulic pressure command) of the determined gear of step S1.The hydraulic pressure learning value of learning value selecting arrangement 104 from the pattern " B " of study and storage selects to be used in the hydraulic pressure value in this hydraulic pressure command, to allow the rotational speed N of transferring elements 18 ₁₈In speed-change process, realize given variation.

With step S4 almost simultaneously, with hybrid power control setup 52 corresponding step S5 in, differential part 11 is carried out speed change and is changed to control actual overall ratio γ T towards target overall ratio γ T with the gear-stage velocity ratio that has that causes by the speed change of using by the automatic speed changing part of carrying out among the step S4 20.This speed change is independently not carry out with the transmission synchronization ground of automatic speed changing part 20.In step S4 and S5, carry out so-called jump speed change and jump step by step to allow overall ratio γ T.

The timing that moment t1 among Figure 15 is expressed as follows: at this moment, the gear-shift command of automatic speed changing part 20 speed change to the second gears is output, as the release hydraulic pressure P of the first drg B1 that discharges the side engagement device _B1Descend.In the time period from t1 to t4, as the engagement hydraulic P of the second drg B2 of engage side coupling device _B2Raise, at moment t4, the joint of the second drg B2 is finished, to finish the speed change of automatic speed changing part 20.

Discharge the transition hydraulic pressure of side engagement device and the transition hydraulic pressure of engage side coupling device and be predetermined to be, the learning value that allows to use being used for of selecting in the hydraulic pressure learning value from pattern " B " as shown in the figure to realize that " 3 grades → 2 grades " lower category makes the rotational speed N of transferring elements 18 ₁₈Realize given variation.For example be similar to embodiment shown in Figure 17, when hydraulic pressure begins to be fed to the engage side coupling device, export high hydraulic pressure value instruction.When engaging beginning, the low hydraulic pressure value instruction of output, the hydraulic pressure value instruction that output afterwards increases the hydraulic pressure value of hydraulic pressure value when joint is finished gradually.

In addition, in the embodiment shown in fig. 15, the rotational speed N of the first electrical motor M1 _M1Raise after moment t1, to increase the speed ratio γ 0 of differential part 11, engine speed N thus raises _ELike this, the input speed N of automatic speed changing part 20 _IN(the rotational speed N of transferring elements 18 ₁₈) increase along with lowering category of automatic speed changing part 20.In addition, in the rotational speed N of the first electrical motor M1 _M1Keep under the substantially invariable situation engine speed N _EIncrease.Because the differential action of differential part 11, differential part 11 uses the first electrical motor M1 to carry out speed change at least, finally adjusts overall ratio γ T to allow differential part 11 head for target overall ratio γ T.

Like this, according to the illustrated embodiment that belongs to the jump speed change, overall ratio γ T discontinuous (level is arranged) is changed.For this reason, differential part 11 is carried out speed change with the speed change of automatic speed changing part 20 asynchronously, because the level that has of the speed ratio that speed change causes changes, makes overall ratio γ T near target overall ratio γ T to utilize, i.e. engine speed N to be achieved after speed change _EThis makes the speed change response improve.In addition, when being similar to illustrated embodiment and making differential part 11 place the stepless change state, can use the second electrical motor M2 to be synchronized with the rotational speed N that energetically change the transferring elements 18 that along with the speed change of automatic speed changing part 20 change of inertia phase basically since moment t2 ₁₈, so that it is near given variation.

If in step S3, make and negate judging, then with step change control setup 54 corresponding step S6 in, make automatic speed changing part 20 speed changes to the gear-shift command of determined gear in step S1 be output to hydraulic control circuit 42.Learning value selecting arrangement 104 selects to be used in hydraulic pressure value in this hydraulic pressure command based on the hydraulic pressure learning value in the pattern " A " of study and storage, so that the rotational speed N of transferring elements 18 ₁₈In speed-change process, realize given variation.

The timing that moment t1 among Figure 13 is expressed as follows: at this moment, automatic speed changing part 20 speed changes to the gear-shift command of third gear is output, as the engagement hydraulic P of the second drg B2 that discharges the side engagement device _B2Begin to reduce.In the time period from t1 to t3, as the engagement hydraulic P of the first drg B1 of engage side coupling device _B1Raise, at moment t3, the joint action of the first drg B1 is finished, to finish the speed change of automatic speed changing part 20.Time period between moment t1 and t3, as shown in the figure, being used for of selecting in the hydraulic pressure learning value of use from pattern " A " realizes that the learning value that " 2 grades → 3 grades " upgrade preset the transition hydraulic pressure of release side engagement device and the transition hydraulic pressure of engage side coupling device, makes the rotational speed N of transferring elements 18 ₁₈Realize given variation.

The timing that moment t1 among Figure 14 is expressed as follows: at this moment, the gear-shift command of automatic speed changing part 20 speed change to the second gears is output, as the engagement hydraulic P of the first drg B1 that discharges the side engagement device _B1Begin to reduce.In the time period from t1 to t4, as the engagement hydraulic P of the second drg B2 of engage side coupling device _B2Raise, at moment t4, the joint action of the second drg B2 is finished, to finish the speed change of automatic speed changing part 20.Time period between moment t1 and t4, as shown in the figure, being used for of selecting in the hydraulic pressure learning value of use from pattern " A " realizes that the learning value that " 3 grades → 2 grades " lower category preset the transition hydraulic pressure of release side engagement device and the transition hydraulic pressure of engage side coupling device, makes the rotational speed N of transferring elements 18 ₁₈Realize given variation.

For example, be similar to the embodiment shown in Figure 15 and 17, export high hydraulic pressure command the zero hour in the hydraulic pressure supply of engage side coupling device, and engaging the low hydraulic pressure value instruction of the output zero hour.Afterwards, output makes the hydraulic pressure value instruction that the hydraulic pressure value of hydraulic pressure value when joint is finished increases gradually.

Next, beginning among the decision maker 82 corresponding step S7, judging whether inertia phase begins in the speed-change process of automatic speed changing part 20 with inertia phase.This judgement depends in the following state.First state is the actual speed N of the second electrical motor M2 _M2Whether changed the specified rate that definite inertia phase begins that is used for that obtains by experiment in advance.

Whether second state has passed through being used for of obtaining is by experiment in advance determined that the engage side coupling device begins to have the given interval of engagement torque capacity.Whether the engagement hydraulic that the 3rd state is the engage side coupling device reaches joint transition hydraulic pressure (instruction) the value Pc that obtains by experiment in advance.Like this, thus judge whether the engage side coupling device begins to have the rotational speed N that the engagement torque capacity makes the second electrical motor M2 _M2Change along with the beginning of inertia phase.

Moment t2 among Figure 13 and the moment t2 among Figure 14 represent to be judged to be inertia phase and begin.Such judgement depends in the following state.First state is the actual speed N of the second electrical motor M2 _M2Whether changed the specified rate that definite inertia phase begins that is used for that obtains by experiment in advance.Whether second state has passed through being used for of obtaining is by experiment in advance determined that the engage side coupling device begins to have the given interval of engagement torque capacity.Whether the engagement hydraulic that the 3rd state is the engage side coupling device reaches joint transition hydraulic pressure (instruction) the value Pc that obtains by experiment in advance.

Then, negate to judge the then operation among the repeated execution of steps S7 if in step S7, make.If in step S7, make sure judgement, then with hybrid power control setup 52 corresponding step S8 in, differential part 11 carries out speed change so that engine speed N _EChange continuously owing to the differential action (electric controlling stepless variable speed work just) of differential part 11.For example, differential part 11 with the direction that changes in the opposite direction of automatic speed changing part 20 speed ratio γ on change speed ratio γ 0, make engine speed N _ERemain on the level of basic fixed.In step S6 to S8, before and after automatic speed changing part 20 speed changes, speed-changing mechanism 10 continuously changes its overall ratio γ T.In addition, can in step S8, carry out, can eliminate or remove the operation among the step S7 thus about the judgement whether inertia phase begins.

T2 among Figure 13 and the time period between the t3 and the t2 among Figure 14 and the time period between the t4 are illustrated in the inertia phase that takes place in the speed-change process of automatic speed changing part 20, and differential part 11 is carried out differential action to control the rotational speed N of the first electrical motor M1 _M1Thereby, make differential part 11 on the direction that the speed ratio with automatic speed changing part 20 changes in the opposite direction, make gear ratio change and the corresponding amount of this gear ratio change.In such time period, before and after automatic speed changing part 20 speed changes, differential part 11 is carried out differential action and is changed overall ratio γ T to prevent automatic speed changing part 20, just makes engine speed N _ERemain on the level of basic fixed.If differential part 11 is similar to illustrated embodiment and is placed in the stepless change state, then can utilize the second electrical motor M2 to be synchronized with the inertia phase that takes place at moment t2 basically and change the rotational speed N of the transferring elements 18 that changes along with the speed change of automatic speed changing part 20 energetically ₁₈

In the speed-change process of the speed change of the speed change of step S4, S5, step S6 to S8 or step S9, with torque descending control device 88 cooresponding step S10 in, carry out torque and descend control, just the input torque T of automatic speed changing part 20 for example to reduce to be passed to the torque of drive wheel 38 _INOr output torque T _OUT

For example, the rotating speed that reduces or form the rotating element of differential part 11 along with the rotating speed of the rotating element that forms automatic speed changing part 20 reduces, and inertia torque occurs as the torque increment of the torque that is passed to drive wheel 38, for example output torque T _OUTTorque increment.Along with engine speed N in the shifting up operation _EReduction, inertia torque occurs as the torque increment of the torque that is passed to drive wheel 38.Likelyly be in the speed-change process of automatic speed changing part 20, when engaging torque fluctuation to take place joint impact takes place owing to finishing at coupling device.

Therefore, in step S10, carry out torque and descend control to eliminate the input torque T with automatic speed changing part 20 to a certain extent _INOr output torque T _OUTIn the corresponding torque increment of inertia torque, perhaps be suppressed at coupling device and finish the torque fluctuation that causes when engaging, suppress joint impact thus.Thereby, for example, carry out independently or in combination and be used to reduce motor torque T _EDescend control or use the control that descends of the motor torque of the second electrical motor M2 of motor torque, cause that the torque that is delivered to drive wheel 38 descends.But, cause that for release the accelerator pedal in lowering category vehicle travels under deceleration regime, just slide when lowering category, drive wheel 38 provides the torque of reverse input, and does not carry out torque decline control, thereby does not need execution in step S10.

In time period in Figure 13 between t2 and the t3, in speed-change process with engine speed N _EMinimize variations.This allows to eliminate to a certain extent and the corresponding torque component of inertia torque (this inertia torque occurs as the torque increment of the torque that is delivered to drive wheel 38).Torque increment stems from the rotation speed change of the rotating element of the rotation speed change of rotating element of automatic speed changing part 20 or differential part 11.In other words, torque decline control has been carried out in this expression.

Figure 14 represents that illustrated embodiment relates to sliding and lowers category, and do not carry out the torque control that descends.But, be passed in the process that lowers category of drive wheel 38 in torque, be similar to the operation of carrying out in embodiment illustrated in fig. 13, can carry out torque and descend control to eliminate the inertia torque component.

In time period in Figure 15 between t3 and the t5, carry out the power connection and lower category.This allows because the coupling device of automatic speed changing part 20 is finished joint (although free-wheel clutch is not set in illustrated embodiment, but under the lock-out state in having the structure of free-wheel clutch) and the torque fluctuation that causes is eliminated to a certain extent, has suppressed joint impact thus.In other words, this expression input torque T _INReduce final period in speed change.

T2 in Figure 16 and in the time period between the t3, executable operations is eliminated with the corresponding torque component of inertia torque (this inertia torque represents to be delivered to the torque increment of the torque of drive wheel 38) to a certain extent allowing.Torque increment stems from motor torque N _EVariation, form automatic speed changing part 20 rotating element rotation speed change or form the rotation speed change of the rotating element of differential part 11.In other words, torque decline control has been carried out in this expression.

Figure 17 represents to carry out and slides the embodiment that lowers category, and illustrates and do not carry out the torque control that descends.But, be passed in the process that lowers category of drive wheel 38 in torque, be similar to the operation of carrying out in embodiment illustrated in fig. 16, can carry out torque and descend control to eliminate the inertia torque component.

If making in step S1 negates the speed change of judging and do not carry out automatic speed changing part 20 in step S11, then each control setup of electronic control package 40 carries out Control work or the end of current routine.For example, when speed-changing mechanism 10 was placed in the stepless change state, hybrid power control setup 52 carried out the speed change of differential part 11 based on vehicle condition.

The diagram of circuit of Figure 18 illustrates the main portion of the Control work of being carried out by electronic control package 40,, is used for the Control work that the hydraulic pressure value of coupling device is learnt that is.Such basic process with for example several milliseconds to a few tens of milliseconds magnitude utmost point minor cycle repeat.

At first, with speed change completion determination device 106 cooresponding step SA1 in, judge whether the speed change of automatic speed changing part 20 is finished.Whether this judgement depends on the speed change of automatic speed changing part 20 in the operating process of carrying out and finishes in step S4, S6 or S9.For example, this judgement depends on whether passed through given time gap, perhaps the actual speed N of transferring elements 18 in the automatic speed changing part 20 ₁₈Whether be synchronized with the rotational speed N of transferring elements 18 after speed change basically ₁₈

If in step SA1, make sure judgement, then setting up among the decision maker 108 cooresponding step SA2, judging whether the precondition that the hydraulic pressure value (activating pressure) of the coupling device that uses is learnt is set up in the speed change of automatic speed changing part 20 with the study precondition.Whether this judgement depends on speed change and normally carries out and finish.Such speed change relates to following situation: the variation of motor torque is in the given value in the speed-change process of automatic speed changing part 20; The Engine Coolant Temperature TEMPw of driving engine 8 makes the warming-up of driving engine 8 be considered to finish; And the actuating of automatic speed changing part 20 oil temperature is in the suitable predetermined value.Like this, judge whether the study precondition is set up.

If in step SA2, make sure judgement, then with differential state determining apparatus 80 corresponding step SA3 in, judge whether differential part (stepless change part) 11 is placed in the stepless change state in the speed-change process of automatic speed changing part 20.In such operation, for example, use the result of determination among the step S2.

If in step SA3, make sure judgement, then changing among the decision maker 86 cooresponding step SA4 with speed ratio, judge that whether in the speed-change process of automatic speed changing part 20 overall ratio γ T changes with the jumping mode step by step of what is called jump speed change.In such operation, for example, use the result of determination among the step S3.

If in step SA4, make and negate judging, then with activating pressure learning control device 100 cooresponding step SA5 in, in the rotational speed N of transferring elements 18 ₁₈Actual change (it is monitored in speed-change process) and the rotational speed N of transferring elements 18 ₁₈Given variation between compare.Be used to revise the learning control of the activating pressure (hydraulic pressure value) of coupling device, with rotation speed change actual in the inhibition variable speed operation (speed change of the automatic speed changing part of just for example in the step S6 of Figure 12, carrying out 20) subsequently and the difference between the given variation.

In addition, after current learning control was revised, the hydraulic pressure value was grouped as the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " A " and is stored.In other words, be used for the hydraulic pressure learning value arteries and veins spectrogram of pattern " A ", hydraulic pressure value after default value relevant with target shift speed kind to be learnt in motor torque and the speed-change process or learning value before write again and revise based on current study, and newly be stored as learning value.

If in step SA4, make sure judgement, then with activating pressure learning control device 100 corresponding step SA6 in, be similar to the operation among the step SA5, executable operations is with the actual speed N at transferring elements 18 ₁₈Variation (it is monitored in speed-change process) and the rotational speed N of transferring elements 18 ₁₈Given variation between compare.Execution is used to revise the learning control of the activating pressure (hydraulic pressure value) of coupling device, the difference when suppressing speed change subsequently between the speed change of the automatic speed changing part of just for example carrying out in the step S12 of Figure 12 20 (time) two kinds of variations.In addition, after current learning control was revised, the hydraulic pressure value was grouped as the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " B " and is stored.

If in step SA3, make and negate judging, then with activating pressure learning control device 100 corresponding step SA7 in, at the actual speed N of transferring elements 18 ₁₈Variation (it is monitored in speed-change process) and the rotational speed N of transferring elements 18 ₁₈Given variation between compare, perhaps at engine speed N _EVariation (it is monitored in speed-change process) and engine speed N _EGiven variation between compare.

Then, be similar to the operation among step SA5 and the SA6, be used to revise the learning control of the activating pressure (hydraulic pressure value) of coupling device, in subsequently speed change (speed change of the automatic speed changing part of for example carrying out among the step S9 at Figure 12 20 just), to suppress the actual change of rotating speed and the difference between the given variation.In addition, after current learning control was revised, the hydraulic pressure value was grouped as the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " C " and is stored.

As a result, as shown in figure 11, hydraulic pressure learning value arteries and veins spectrogram is stored as pattern " A ", " B " and " C ".

If make in step SA1 or in step SA2 negates to judge, then in step SA8, each control setup of electronic control package 40 carries out Control work, and perhaps current routine finishes and the activating pressure of the coupling device of automatic speed changing part 20 do not learnt.

The diagram of circuit of Figure 19 illustrates the main portion of the Control work of being carried out by electronic control package 40, just the Control work that the learning value of the coupling device activating pressure that uses in the speed change of automatic speed changing part 20 is selected.Such basic process with for example several milliseconds to a few tens of milliseconds magnitude utmost point minor cycle repeat.

In illustrated embodiment, as mentioned above, have three hydraulic pressure learning value arteries and veins spectrograms that are used for pattern " A ", " B " and " C ".In Figure 19, the Control work that learning value is selected is described with reference to the exemplary cases that is placed in stepless change state or non-stepless change state in differential part 11.Among pattern " A " and " B ", pattern " A " is placed in the hydraulic pressure learning value arteries and veins spectrogram stepless change state under with acting on differential part 11, and pattern " C " usefulness acts on differential part 11 and is placed in hydraulic pressure learning value arteries and veins spectrogram under the non-stepless change state.

At first, with learning control decision maker 102 cooresponding step SB1 in, judge whether the study that is placed in the activating pressure that uses under the situation of stepless change state in differential part 11 in the speed change of automatic speed changing part 20 is finished.Whether each default value that this judgement depends in the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " A " (it is used in the speed change of the step S6 automatic speed changing part 20 of Figure 12 for example) is learnt.

If in step SB1, make sure judgement, then similarly, with learning control decision maker 102 cooresponding step SB2 in, judge to be placed under the situation of non-stepless change state whether the study of the activating pressure that uses in the speed change of automatic speed changing part 20 finished in differential part 11.Whether each default value that this judgement depends in the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " C " (it is used in the speed change of the step S9 automatic speed changing part 20 of Figure 12 for example) is learnt.

If in step SB2, make sure judgement, then with learning value selecting arrangement 104 cooresponding step SB3 in, executable operations with in its relevant speed-change process based on the state of speed-changing mechanism 10 by selecting hydraulic pressure learning value arteries and veins spectrogram with reference to the hydraulic pressure learning value arteries and veins spectrogram that is organized and is stored as pattern " A " and " C " respectively.Simultaneously, operate with based on motor torque T _EWith the speed change kind by be chosen in the learning value of the coupling device activating pressure that uses in the speed change of automatic speed changing part 20 with reference to selected hydraulic pressure learning value arteries and veins spectrogram.

If make in step SB2 negates to judge, then with activating pressure learning control device 100 cooresponding step SB4 in, operate to revise the default value of the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " C " in the speed change of automatic speed changing part 20, use under the situation that is placed in non-stepless change state in differential part 11.Such correction is based on the learning value of distinguishing with identical motor torque and speed change kind at the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " A " and carry out, and pattern " A " is to obtain by the study in the speed change that is placed in stepless change state automatic speed changing of following time part 20 in differential part 11.

For example, under the stepless change state, just in the learning value that is used for pattern " A " by with when underlap side out-of-position trend is revised, the hydraulic pressure value (default value that just is used for pattern " C ") that non-stepless change state occurs down be with revise towards the trend of underlap side offset slightly and be stored as learning value.

On the contrary, if the default value that the learning value that is used for pattern " A ", then is used for pattern " C " by to revise towards lap over side out-of-position trend by to revise and to be stored as learning value towards the trend of lap over side offset slightly.In the speed-change process of automatic speed changing part 20, (after proofreading and correct) learning value is as the learning value of the activating pressure of the coupling device that uses in the speed change of automatic speed changing part 20 after the correction that learning value selecting arrangement 104 is selected to be correlated with.

If make in step SB1 negates to judge, then with learning control decision maker 102 cooresponding step SB5 in, judge whether the study that is placed in the activating pressure that uses under the situation of non-stepless change state in differential part 11 in the speed change of automatic speed changing part 20 is finished.If in step SB5, make sure judgement, then with activating pressure learning control device 100 cooresponding step SB6 in, executable operations is to revise the default value of the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " A " use in the speed change of automatic speed changing part 20 under the situation that is placed in the stepless change state in differential part 11.Such correction depends on the learning value of distinguishing with identical motor torque and speed change kind at the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " C ", and pattern " C " is to obtain by the study in the speed change that is placed in non-stepless change state automatic speed changing of following time part 20 in differential part 11.

For example, under non-stepless change state, just in the learning value that is used for pattern " C " by with when underlap side out-of-position trend is revised, then the hydraulic pressure value (default value that just is used for pattern " A ") that occurs down of stepless change state be with revise towards the trend of underlap side offset slightly and be stored as learning value.On the contrary, if the default value that the learning value that is used for pattern " C ", then is used for pattern " A " by to revise towards lap over side out-of-position trend by to revise and to be stored as learning value towards the trend of lap over side offset slightly.In the speed-change process of automatic speed changing part 20, (after proofreading and correct) learning value is as the learning value of the activating pressure of the coupling device that uses in the speed change of automatic speed changing part 20 after the correction that learning value selecting arrangement 104 is selected to be correlated with.

If make in step SB5 negates to judge that then the study that the hydraulic pressure that uses in speed change under the stepless change state and the speed change under non-stepless change state is carried out is not all finished.In other words, to the default value of the hydraulic pressure learning value arteries and veins spectrogram that is used for pattern " A " be used for operation that the default value of the hydraulic pressure learning value arteries and veins spectrogram of pattern " C " learns the two does not all carry out.Be placed in differential part 11 during the speed change of automatic speed changing part 20 under the situation of stepless change state, with learning value selecting arrangement 104 cooresponding step SB7 in, be set the hydraulic pressure value that the default value that is used for stepless change state (just being used for pattern " A ") intactly is chosen as the coupling device that uses in the speed change of automatic speed changing part 20.

Next, be placed in differential part 11 during the speed change of automatic speed changing part 20 under the situation of non-stepless change state, with learning value selecting arrangement 104 cooresponding step SB8 in, be set the hydraulic pressure value that the default value that is used for non-stepless change state (just being used for pattern " C ") intactly is chosen as the coupling device that uses in the speed change of automatic speed changing part 20.This is not all learnt with the default value that is used for the hydraulic pressure learning value arteries and veins spectrogram of pattern " C " because be used for the default value of the hydraulic pressure learning value arteries and veins spectrogram of pattern " A ".

In accordance with the embodiments illustrated, as mentioned above, in the speed-change process of automatic speed changing part 20, the activating pressure of the activating pressure control setup 84 controls formation coupling device of automatic speed changing part 20 is to allow the rotational speed N of transferring elements 18 when differential part 11 is placed in the stepless change state ₁₈Change with given variation pattern.This allows the rotational speed N of transferring elements 18 ₁₈(its speed ratio γ by vehicle velocity V and automatic speed changing part 20 is unique to be determined) changes with given variation pattern.This provides balance between fast speed change response and slow speed change response, in fast speed change response, and the rotational speed N of transferring elements 18 ₁₈Has bigger rate of change N ₁₈, (it is considered to for example have comfortable sensation), in slow response, the rotational speed N of transferring elements 18 ₁₈Has less rate of change N ₁₈' (it is considered to suppress easily speed change and impacts), suppress that thus speed change takes place and impact.

In addition, in illustrated embodiment, be placed in differential part 11 under the situation of non-stepless change state in the speed-change process of automatic speed changing part 20, the activating pressure of the activating pressure control setup 84 controls formation coupling device of automatic transmission with hydraulic torque converters 20 makes the rotational speed N of transferring elements 18 ₁₈Perhaps engine speed N _ERealize given variation.Thus, be placed under the situation of non-stepless change state the rotational speed N of transferring elements 18 in differential part 11 ₁₈Perhaps engine speed N _E(its speed ratio γ by vehicle velocity V and automatic speed changing part 20 is unique to be determined) realizes given variation, to provide balance between response and the slow response fast, and in quick response, rotational speed N ₁₈Has bigger rate of change N ₁₈' (its be considered to for example provide comfortable sensation), in slow response, rotational speed N ₁₈Has less rate of change N ₁₈' (it is considered to suppress easily speed change and impacts).This has suppressed the generation that speed change is impacted.

In addition, in illustrated embodiment, hybrid power control setup 52 changes the rotational speed N of the first electrical motor M1 _M1, before and after the speed change of automatic speed changing part 20, to continuously change engine speed N _EThis makes ratio at engine speed N _EMore can suppress speed change when discontinuous variation promptly changes step by step impacts.

In addition, in illustrated embodiment, the activating pressure of the coupling device of activating pressure control setup 84 study automatic speed changing parts 20 is to allow the rotational speed N of transferring elements 18 ₁₈Perhaps engine speed N _ERealize above-mentioned given variation.This causes further having suppressed the speed change impact.

In addition, in illustrated embodiment, make the rotational speed N of transferring elements 18 at hybrid power control setup 52 ₁₈Under the situation about changing, activating pressure control setup 84 is forbidden the activating pressure of coupling device is learnt in the speed-change process of automatic speed changing part 20.Thus, this has suppressed not change at hybrid power control setup 52 rotational speed N of transferring elements 18 ₁₈The time speed change generation impacted.

In addition, in illustrated embodiment, make the rotational speed N of transferring elements 18 at hybrid power control setup 52 ₁₈Under the situation about changing, activating pressure control setup 84 is in the rotational speed N of considering by transferring elements 18 ₁₈The activating pressure of study coupling device under the situation of the variation that causes.Thereby the activating pressure of coupling device is learnt, and the result has caused deducting because hybrid power control setup 52 changes the rotational speed N of transferring elements 18 ₁₈The caused by operations speed change impact to suppress effect, suppressed rotational speed N thus at transferring elements 18 ₁₈The generation that the speed change that causes when not changing by hybrid power control setup 52 is impacted.

Below, other embodiment of the present invention will be described.In the following description, these embodiment common means will be used identical reference number with part, and omit its explanation.

＜embodiment 2 〉

Figure 20 illustrates the skeleton diagram of the structure of speed-changing mechanism 70 in accordance with another embodiment of the present invention.The start of Figure 21 is expressed the gear stage of speed-changing mechanism 70 and is used for relation between its start combination of fluid pressure type friction engagement device.The alignment chart of Figure 22 has illustrated the variable speed operation of speed-changing mechanism 70.

As the foregoing description, speed-changing mechanism 70 comprises differential part 11 and automatic speed changing part 72, differential part 11 comprises the first electrical motor M1, power splitting mechanism 16 and the second electrical motor M2, and automatic speed changing part 72 is connected with output shaft 22 with differential part 11 via transferring elements 18 and has three forward direction gears.Power splitting mechanism 16 comprises first planetary gear unit 24 (have for example about 0.418 given speed ratio ρ 1), the switch clutch C0 of single pinion type and switches drg B0.Automatic speed changing part 72 comprises second planetary gear unit 26 (have for example about 0.532 given speed ratio ρ 2) of single pinion type and the third line star gear unit 28 of single pinion type (have for example about 0.418 given speed ratio ρ 3).

The sun gear S3 of the sun gear S2 of second planetary gear unit 26 and the third line star gear unit 28 is integrally joined to each other.These sun gears S2 and S3 optionally join transferring elements 18 to via second clutch C2, and optionally join housing 12 to via the first drg B1.The 3rd gear ring R3 (the two is integrally joined to each other) of the second pinion carrier CA2 of second planetary gear unit 26 and the third line star gear unit 28 is connected to output shaft 22.The second gear ring R2 optionally is connected to transferring elements 18 via first clutch C1, and the third line star frame CA3 optionally joins housing 12 to via the second drg B2.

According to the speed-changing mechanism 70 of structure like this, switch clutch C0, first clutch C1, second clutch C2, switching drg B0, the first drg B1 and the second drg B2 for example optionally engage as shown in the figure by start table shown in Figure 21.Optionally set up first gear (the first fast position) to the fourth speed position one of (the 4th fast position), backing car gear (activation point backward) and Neutral Position.At this moment, each gear has speed ratio the γ (=input shaft rotating speed N of geometric ratio variation basically _IN/ output shaft rotational speed N _OUT).

Especially, according to present embodiment, power splitting mechanism 16 comprises switch clutch C0 and switches drg B0.Under the state of switch clutch C0 or switching drg B0 joint, differential part 11 can be configured to take can be used as the stepless change state of toric transmission work, in addition, can also take can be used as the fixedly speed change state of change-speed box work with fixed speed ratio.Thus, enter under the situation of joint at switch clutch C0 or switching drg B0, speed-changing mechanism 70 can take to be used for the structure of stepless change state, and it can utilize the differential part 11 that is placed in fixing speed change state and automatic speed changing part 72 and as step change transmission work.

All enter under the situation of release position at switch clutch C0 and switching drg B0, speed-changing mechanism 70 can be taked the stepless change state, and it can utilize the differential part 11 that is placed in the stepless change state and automatic speed changing part 72 and as electric steplessly variable transmission work.In other words, by engaging switch clutch C0 or switching drg B0, speed-changing mechanism 70 is switched to the step change state, and by discharging switch clutch C0 and switching drg B0, speed-changing mechanism 70 is switched to the stepless change state.

For example as shown in figure 21, in order to make speed-changing mechanism 70 as step change transmission, switch clutch C0, first clutch C1 and the second drg B2 are engaged, this set up for example have about 2.804 the most at a high speed than first gear of γ 1.Under switch clutch C0, first clutch C1 and the engaged situation of the first drg B1, set up second gear with speed ratio γ 2 lower than the speed ratio of first gear, speed ratio γ 2 for example is approximately 1.531.Under switch clutch C0, first clutch C1 and the engaged situation of second clutch C2, foundation has the third gear of the speed ratio γ 3 lower than the speed ratio of second gear, and speed ratio γ 3 for example is approximately 1.000.

Under first clutch C1, second clutch C2 and the engaged situation of switching drg B0, set up fourth speed position with speed ratio γ 4 lower than the speed ratio of third gear, speed ratio γ 4 for example is approximately 0.705.In addition, under second clutch C2 and the engaged situation of the second drg B2, foundation has the backing car gear of the speed ratio γ R between the speed ratio of the speed ratio of first gear and second gear, and speed ratio γ R for example is approximately 2.393.In addition, for neutral gear to be set up " N " state, for example only engage switch clutch C0.

On the contrary, in order to make speed-changing mechanism 70 as toric transmission, switch clutch C0 and switching drg B0 both are released, shown in the start table among Figure 21.This allows differential part 11 as toric transmission, and is used as step change transmission with differential part 11 polyphone bonded assembly automatic speed changing parts 72.When this takes place, for each gear that is placed in respectively under first gear, second gear and the third gear, be input to the rotating speed of automatic speed changing part 72, just the rotating speed of transferring elements 18 continuously changes.This allows each gear to have the speed ratio that is positioned at stepless variation range.Thus, the speed ratio of automatic speed changing part 72 can be on adjacent gear changes continuously, makes the whole speed ratio γ T of speed-changing mechanism 70 can be used as integral body and changes in a continuous manner.

The alignment chart of Figure 22 is illustrated under the different engagement states that are respectively applied for the gear of wanting in the speed-changing mechanism 70, the relativeness between the rotating speed of rotating element.Speed-changing mechanism 70 is by constituting as the differential part 11 of the stepless change part or first variable part and as the automatic speed changing part 72 of the step change part or second variable part.All be released for switch clutch C0 and switching drg B0, and be engaged for switch clutch C0 or switching drg B0, the rotating element of power splitting mechanism 16 is to rotate with identical as mentioned above speed.

In Figure 22, four vertical curve Y4, Y5, Y6 and Y7 of automatic speed changing part 72 are corresponding with the 4th to the 7th rotating element RE4 to RE7 respectively in order from left to right.The 4th rotating element (quaternary part) RE4 represents the second and the 3rd sun gear S2, the S3 that are integrally joined to each other.The 5th rotating element (the 5th element) RE5 is corresponding to the third line star frame CA3.The 6th rotating element (the hexa-atomic) RE6 represents the second pinion carrier CA2 and the 3rd gear ring R3 that are integrally joined to each other.The 7th rotating element (the 7th element) RE7 is corresponding to the second gear ring R2.In addition, in automatic speed changing part 72, the 4th rotating element RE4 optionally is connected to transferring elements 18 via second clutch C2, and optionally is connected to housing 12 via the first drg B1.The 5th rotating element RE5 optionally is connected to housing 12 via the second drg B2.The 6th rotating element RE6 is connected to the output shaft 22 of automatic speed changing part 72.The 7th rotating element RE7 optionally is connected to transferring elements 18 via first clutch C1.

Automatic speed changing part 72 is worked in mode as shown in figure 22.In other words, when first clutch C1 and the second drg B2 were engaged, the intersection point between angled straight lines L1 and the vertical curve Y6 was illustrated in the rotating speed of output shaft 22 under first gear.Angled straight lines L1 pass the intersection point between vertical curve Y7 and the horizon X2 and pass vertical curve Y5 and horizon X1 between intersection point, vertical curve Y7 represents the rotating speed of the 7th rotating element (the 7th element) RE7 (R2), and vertical curve Y5 represents the rotating speed of the 5th rotating element RE5 (CA3).Vertical curve Y6 represents to be connected to the 6th rotating element (the hexa-atomic) RE6 (CA2, rotating speed R3) of output shaft 22.

Similarly, the rotating speed of output shaft 22 when angled straight lines L2 that determines under first clutch C1 and the engaged situation of the first drg B1 and the intersection point between the vertical curve Y6 are represented to be in second gear, vertical curve Y6 represent to be connected to the rotating speed of the 6th rotating element RE6 of output shaft 22.The rotating speed of output shaft 22 when horizontal linear L3 that determines under first clutch C1 and the engaged situation of second clutch C2 and the intersection point between the vertical curve Y6 are represented to be in third gear, vertical curve Y6 represent to be connected to the rotating speed of the 6th rotating element RE6 of output shaft 22.

For first gear to third gear, as the engaged result of switch clutch C0, differential part 11 with engine speed N _EIdentical rotating speed is input to the 7th rotating element RE7 with propulsive effort.But when switching drg B0 replaced switch clutch C0 to be engaged, differential part 11 was with ratio engine speed N _EBig rotating speed is input to the 7th rotating element RE7 with propulsive effort.Thus, intersection point between horizontal linear L4 and the vertical curve Y6 is illustrated in the rotating speed of output shaft 22 under the fourth speed position, straight line L4 is at first clutch C1, second clutch C2 and switches under the situation that drg B0 engages and determine, vertical curve Y6 represents to be connected to the rotating speed of the 6th rotating element RE6 of output shaft 22.

Even according to present embodiment, speed-changing mechanism 70 comprises differential part 11 (as the toric transmission or first variable part) and automatic speed changing part 72 (as the step change transmission or second variable part).This allows speed-changing mechanism 70 to have identical advantageous effects with previous embodiment.

＜embodiment 3 〉

Figure 23 illustrates the example of interactive switch 44 as the manual selecting arrangement of speed change state (below be called " switch 44 "), and it is installed on the vehicle and by vehicle driver's M/C.Switch 44 allows M/C, so that power splitting mechanism 16 optionally places differential state and non-differential state (lock-out state), just the stepless change state of speed-changing mechanism 10 and step change state.Switch 44 allows vehicle to travel with the speed change state that the vehicle driver needs.Switch 44 has: stepless change driving instruction button shows " stepless ", expression stepless change driving mode on it; With step change driving instruction button, show " level is arranged " on it, expression step change driving mode.When the vehicle driver depressed one in these buttons, speed-changing mechanism 10 was selectively placed on stepless change state that can be used as electric steplessly variable transmission work or the step change state that can be used as step change transmission work.

With reference to speed-changing mechanism 10 wherein based on the variation of vehicle condition for example the situation of the automatic switchover control by carrying out speed change state with reference to graph of a relation shown in Figure 6 the foregoing description is described.On the contrary, replace or be additional to the automatic switchover Control work, can cabinet switch 44 be used to control the manual switchover control of the speed change state of speed-changing mechanism 10 with execution.

In other words, be used for stepless change state and step change state of switch 44 according to being selectively operated, switching control 50 can preferentially switch to speed-changing mechanism 10 stepless change state and step change state.For example, if the vehicle driver need experience the sensation of toric transmission and the driving mode of raising fuel efficiency, then it manually selects speed-changing mechanism 10 is placed the stepless change state.In addition, step change transmission is followed the driving mode of the rhythmic speed change that changes of engine speed if desired, and then the vehicle driver can manually select speed-changing mechanism 10 is placed the step change state.

In addition, switch 44 may be provided with the center position of neither selecting the stepless change driving mode not select the step change driving mode again.Under this possibility, when switch 44 remains on the state with center position, if the vehicle driver does not select speed change state that needs or the speed change state that needs at automatic switchover mode, then can carry out the automatic switchover control of the speed change state of speed-changing mechanism 10.

With situation about being described as follows, the wherein speed change state of speed-changing mechanism 10 control of carrying out manual switchover by the M/C rather than the automatic switchover Control work of switch.In diagram of circuit shown in Figure 12, whether power splitting mechanism 16 is in the differential state, just whether differential part 11 is in the stepless change state, depends on the differential state stepless change state of speed-changing mechanism 10 just of whether having selected power splitting mechanism 16.

＜embodiment 4 〉

Figure 24 is the functional block diagram that the controllable function of electronic control package 40 is shown.In this embodiment, control signal from above-mentioned Fig. 4 similarly electronic control package output to the driving engine output control equipment 43 of control driving engine output.Described control signal comprises the throttle of the electronic throttle 96 of operation setting on the air inlet pipe 95 of driving engine 8 _THThe drive signal of throttle actuator 97, and control is by the fuel feed signal of Fuel Injection Device 98 to the fuel feed of the air inlet pipe 95 of driving engine 8 or cylinder.

In illustrated embodiment, step change control setup 54 makes automatic speed changing part 20 carry out speed change, changes the speed ratio γ T of speed-changing mechanism 10 so that level to be arranged, and follows in this, and the overall ratio γ T of speed-changing mechanism has level to change before and after speed change.This makes it possible to change driving torque than the higher speed of speed that realizes when continuously changing overall ratio γ T.On the contrary, may take place that speed change is impacted or at control engine speed N _EMeet difficulty to make it the following optimum fuel consumption curve aspect, thereby cause the deterioration of consumption of fuel.

Consider above-mentioned situation, the speed change that hybrid power control setup 52 is synchronized with automatic speed changing part 20 is carried out the speed change of differential part 11.This level that has that has suppressed overall ratio γ T changes, that is, the transition change of overall ratio γ T is a continually varying in the speed-change process of automatic speed changing part 20.In other words, hybrid power control setup 52 is carried out the speed change of differential part 11, carries out automatically controlled CVT function (CVT effect) to allow differential part 11.This has suppressed engine speed N _EVariation before and after automatic speed changing part 20 speed changes.

More specifically, automatic speed changing part 20 is carried out speed change, thereupon, and the rotational speed N of expression automatic speed changing part 20 _INThe rotational speed N of transferring elements 18 (the second electrical motor M2) ₁₈Change.Hybrid power control setup 52 is synchronized with the speed change of automatic speed changing part 20 and carries out the speed change of differential part 11, and is not subjected to the constraint of this rotation speed change, makes engine speed N _EWith given state variation, just be in than given engine speed N _E' little speed.Here employed term " given engine speed N _E' " represent to have considered at automatic speed changing part 20 speed changes front and back engine speed N _EThe situation that variation is suppressed and the transition change of overall ratio γ T is continuous under engine speed N _EVariation.In other words, given engine speed N _E' the expression given value, the goals ratio γ 0 that in the speed-change process of differential part 11, changes that its expression obtains by experiment in advance and stores.

For example, before and after the speed change of automatic speed changing part 20, the transition change of overall ratio γ T is not discontinuous change, in other words, and engine speed N _ERemain on substantially invariable level.This allows the transition change of overall ratio γ T to continuously change.Therefore, hybrid power control setup 52 is synchronized with the speed change of the speed change execution differential part 11 of automatic speed changing part 20, make speed ratio γ 0 change in the opposite direction in the side that changes with the speed ratio γ of automatic speed changing part 20, in other words, speed ratio γ 0 change changes a corresponding variable quantity with the level that has of the speed ratio γ of automatic speed changing part 20.

Therefore, even along with the speed change of automatic speed changing part 20 makes speed ratio γ have level to change, the level that has that has also suppressed overall ratio γ T before and after the speed change of automatic speed changing part 20 changes, and has suppressed the speed change impact thus.Therefore, hybrid power control setup 52 is used to change the rotational speed N of first electrical motor as control device of electric motor _M1Before and after automatic speed changing part 20 speed changes, to avoid engine speed N _EVariation.No matter since the rotating speed of the transferring elements 18 that the speed change of automatic speed changing part 20 causes (hereinafter referred to as rotational speed N ₁₈) how to change, all carry out such function.

In addition, hybrid power control setup 52 allows differential part 11 to carry out automatically controlled CVT function, is used to control the rotational speed N of the first electrical motor M1 _M1The perhaps rotational speed N of the second electrical motor M2 _M2, and be not subjected to vehicle to remain on the constraint of halted state or motoring condition.This makes engine speed N _ERemain on substantially invariable level or rotatably control with any rotating speed.In other words, hybrid power control setup 52 can rotatably be controlled the rotational speed N of the first electrical motor M1 with any rotating speed _M1Or the rotational speed N of the second electrical motor M2 _M2, simultaneously with engine speed N _ERemain on substantially invariable level or control engine speed N with any rotating speed _E

For example, from alignment chart shown in Figure 3 as can be seen, engine speed N in the vehicle ' process _EDuring rising, hybrid power control setup 52 executable operations are with the first electrical motor N that raises _M1Rotating speed, simultaneously with the rotational speed N of the second electrical motor M2 _M2Remain on substantially invariable level.In addition, as engine speed N in the speed-change process of automatic speed changing part 20 _EWhen remaining on substantially invariable level, according to the speed change of automatic speed changing part 20, hybrid power control setup 52 makes the rotational speed N of first electrical motor _M1With the rotational speed N of the second electrical motor M2 _M2Go up in the opposite direction and change the side that changes, simultaneously with engine speed N _ERemain on substantially invariable level.

When switching the engaged/released state of coupling device (switch clutch C0 and switching drg B0) based on vehicle condition, switching control 50 optionally switches stepless change state and step change state, just differential state and lock-out state.For example, switching control 50 judges that speed-changing mechanism 10 (the differential part 11) speed change state of changing to be cut remains on stepless control area (being used to make speed-changing mechanism 10 to place the stepless change state) a grade control area (being used to make speed-changing mechanism 10 to be in the step change state) is still arranged.This judgement depends on by vehicle velocity V and the output torque T that needs _OUTThe vehicle condition of expression is by with reference to being stored in the memory storage 56 in advance and the speed change figure that draws with dotted line or long and two-short dash line in Fig. 6 (speed change arteries and veins spectrogram and relation) carries out.According to the result who judges, switching control 50 optionally switches in stepless change state and the step change state any with speed-changing mechanism 10.

Thus, by switching the engaged/released state of switch clutch C0 or switching drg B0, switching control 50 just limits the differential restraint device of the work of electric steplessly variable transmission as the automatically controlled differential gear under the non-stepless change state.For example, switching control 50 is judged and is used for activating differential part 11 as the control convenience of the electric system of electric steplessly variable transmission (for example electrical motor etc.) whether et out of order or function trouble.Occurring under this fault or the handicapped situation, speed-changing mechanism 10 is preferentially placed the step change state.

Except differential part 11, the speed-changing mechanism 10 of present embodiment also comprises automatic speed changing part 20, and step change control setup 54 is for example carried out speed change by reference speed change figure shown in Figure 6 based on vehicle condition.When carrying out the speed change of automatic speed changing part 20, constant if vehicle velocity V keeps before and after speed change, the input speed N of automatic speed changing part 20 then _INChange along with speed change.

The release side engagement device relevant with the speed change of automatic speed changing part 20 and the engagement hydraulic of engage side coupling device and these coupling devices engage or the actuating time of release is according to motor torque T _EAnd set equably.This allows input speed N _IN(the rotational speed N of transferring elements 18 just ₁₈) change along with the speed change of automatic speed changing part 20, to realize given variable condition.

Here the employed term " rotational speed N of transferring elements 18 ₁₈Given variable condition " variable condition of expression such as given rate of change, it obtains so that the rotational speed N of transferring elements 18 in advance by experiment ₁₈The state that (its speed ratio γ by vehicle velocity V and automatic speed changing part 20 is unique to be determined) realizes ideal in the speed-change process of automatic speed changing part 20.For example, the rotational speed N of in the speed-change process of automatic speed changing part 20, working as transferring elements 18 ₁₈Rate of change N ₁₈' (=d N ₁₈/ when dt) increasing, then obtain to have the quick speed change response of comfort.If rate of change N ₁₈' descend, then obtain to suppress easily the slow speed change response that speed change is impacted.In other words, shortening the effect that realizes combination between speed change time and the impact of inhibition speed change.

But according to for example independent situation of carrying out the situation of speed change or combining the speed change of carrying out differential part 11 with the speed change of automatic speed changing part 20 in automatic speed changing part 20, the rotating element that stands inertia is with difference.Therefore, if the activating pressure of the coupling device relevant with the speed change of automatic speed changing part 20 is set the rotational speed N of transferring elements 18 then equably ₁₈Becoming is difficult to realize given variable condition, causes increasing speed change and impacts.On the contrary, if the activating pressure of control coupling device in the speed-change process of automatic speed changing part 20, to realize given variable condition, then the Xiang Guan control complexity that becomes causes increasing the speed change impact.

The speed-changing mechanism 10 of present embodiment (differential part 11 and power splitting mechanism 16) can optionally switch to stepless change state (differential state) and non-stepless change state (lock-out state).Switching control 50 is judged differential part 11 speed change state of changing to be cut based on vehicle condition, thus differential part 11 is optionally switched to stepless change state or step change state.

Carry out speed change if for example be placed under the situation of stepless change state automatic speed changing part 20 in differential part 11, hybrid power control setup 52 control automatically controlled CVT functions (differential action) are then carried out the speed change of differential part 11 thus.At this moment, differential part 11 is synchronized with the speed change of automatic speed changing part 20 and carries out speed change, to suppress engine speed N before and after automatic speed changing part 20 speed changes _E, just for example with the rotational speed N of transferring elements 18 ₁₈Remain on substantially invariable level, and be not subjected to because the rotational speed N of the transferring elements 18 that relevant speed change causes ₁₈The constraint how to change.

In addition, carry out speed change if for example be placed under the situation of step change state automatic speed changing part 20 in differential part 11, then the speed ratio γ 0 of differential part 11 is also fixing.This makes engine speed N _EBe similar to the rotational speed N of transferring elements 18 ₁₈Determine by the speed ratio γ of vehicle velocity V and automatic speed changing part 20 is unique.In other words, be placed in differential part 11 under the situation of step change state, before and after automatic speed changing part 20 speed changes, be synchronized with its speed change, hybrid power control setup 52 uses the first electrical motor M1 to control automatically controlled CVT function (differential action), so that differential part 11 speed changes, and can not be difficult to suppress engine speed N _E

Then, when from automatic speed changing part 20 observation driving engines 8, according to the stepless change state and the non-stepless change state of differential part 11, different inertial masses takes place in speed-change process.Under the former state, differential action allows engine speed N _EFreely change, and be not subjected to the rotational speed N of transferring elements 18 ₁₈The constraint of variation.Under the latter's state, engine speed N _EWith with the rotational speed N of transferring elements 18 ₁₈The similar pattern of variation change.

In other words, when differential part 11 is placed in non-stepless change state, compare when being placed in the stepless change state with differential part 11, in speed-change process because engine speed N _EVariation and the inertia that causes increases.Therefore, as mentioned above, if the coupling device relevant with the speed change of automatic speed changing part 20 has the activating pressure of determining at the stepless change state and the non-stepless change state homogeneous of differential part 11, then speed change is impacted and is easy to increase.This is because the rotational speed N of transferring elements 18 ₁₈Become and be difficult to obtain given variable condition.

In illustrated embodiment, be placed in differential part 11 under the situation of stepless change state, nature, even when being in the step change state, speed-changing mechanism 10 also carries out speed change in the speed-change process of automatic speed changing part 20, to suppress the generation that speed change is impacted.Below, will such variable speed operation be described in detail.

In Figure 24, except aforesaid function, hybrid power control setup 52 has the function as control device of electric motor, is used for the rotational speed N of speed-change process (in the speed change transition period) the change transferring elements 18 in automatic speed changing part 20 ₁₈This is to use the first electrical motor M1 and/or the second electrical motor M2 to carry out.More specifically, the inertia phase in automatic speed changing part 20 speed-change processes, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈To achieve given variable condition.

With the rotational speed N that mainly changes transferring elements 18 with the speed change of automatic speed changing part 20 by the joint action that discharges side engagement device and engage side coupling device ₁₈Situation compare, this allows the rotational speed N of transferring elements 18 ₁₈Further near given variable condition, in addition, hybrid power control setup 52 can mainly use the first electrical motor M1 and/or the second electrical motor M2 fully to change the rotational speed N of transferring elements 18 ₁₈Control the activating pressure of coupling device with the variable speed control of carrying out and compare in considering differential part 11, this has further simplified control.

Here employed statement " mainly changes the rotational speed N of transferring elements 18 with the speed change of automatic speed changing part 20 by the joint action that discharges side engagement device and engage side coupling device ₁₈" be meant following situation.This is corresponding to following situation: adopt the activating pressure of determining equably in advance for example to make the rotational speed N of transferring elements 18 ₁₈Realize given variable condition.

Inertia phase begins decision maker 180 and judges as follows whether inertia phase begins in the speed-change process of automatic speed changing part 20.In other words, this judgement depends on the rotational speed N of transferring elements 18 ₁₈Whether begin to change.This variation stems from the speed change of 54 pairs of automatic speed changing parts 20 of step change control setup and judges that the engage side coupling device begins to have the engagement torque capacity afterwards to discharge the operation of described release side engagement device.

For example, inertia phase begins decision maker 180 operates with in the following pattern any, to judge the rotational speed N of the second electrical motor M2 _M2The operation that begins to have the engagement torque capacity owing to the engage side coupling device begins to change.At first, this judgement depends on the actual speed N of transferring elements 18 ₁₈(the rotational speed N of the second electrical motor M2 just _M2) whether having changed specified rate, this specified rate is obtained by experiment in advance for being used for judging at the on period that step change control setup 54 makes automatic speed changing part 20 carry out speed change the beginning of inertia phase.

Second, this judgement depends on whether passed through given time gap when step change control setup 54 determines the speed change of automatic speed changing part 20, and this time gap is confirmed as the engage side coupling device in advance by experiment and begins to have the required time of engagement torque capacity.The 3rd, whether the engagement hydraulic that this judgement depends on the engage side coupling device arrives joint transition hydraulic pressure (instruction) value Pc, and this value Pc is confirmed as making the activating pressure of engage side coupling device to begin to have hydraulic pressure (instruction) value of engagement torque capacity in advance by experiment.

In illustrated embodiment, speed-changing mechanism 10 can be operated optionally to be switched to stepless change state and non-stepless change state.When being placed in the stepless change state, speed-changing mechanism 10 in the speed-change process of automatic speed changing part 20 (in the speed change transition period), is similar to the rotational speed N of transferring elements 18 ₁₈, engine speed N _ECan come unique definite with the speed ratio γ of vehicle velocity V and automatic speed changing part 20.Thus, hybrid power control setup 52 can be used as control device of electric motor, is used to use the first electrical motor M1 and/or the second electrical motor M2 to change engine speed N _EBelow, detailed description is used to change the rotational speed N of transferring elements 18 ₁₈Or the N of engine speed _EThe Control work of changing method, this depends in the speed-change process of automatic speed changing part 20 box of tricks 11, and to be placed in the stepless change state also be non-stepless change state.

Carried out speed change if determine automatic speed changing part 20, then differential state determining apparatus 182 judges whether power splitting mechanism 16 is placed in the differential state, and just whether differential part 11 is placed in the stepless change state.For example carry out judgement when judging that with reference to speed change figure shown in Figure 6 automatic speed changing part 20 is treated extremely gear of speed change based on vehicle condition to speed change at step change control setup 54.

For example, differential state determining apparatus 182 is judged and is in a grade control area is arranged (be used for switching control 50 and controllably speed-changing mechanism 10 switched to the step change state) still stepless control area (being used to switch to the stepless change state).For this purpose, based on according to by vehicle velocity V and output torque T _OUTThe vehicle condition of expression and reference speed change figure shown in Figure 6 judges whether be in the stepless change control area, judges whether differential part 11 is placed in the stepless change state.

Make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, sometimes, differential state determining apparatus 182 determines differential part 11 and is placed in the stepless change state.When this took place, the inertia phase of hybrid power control setup 52 in automatic speed changing part 20 speed-change processes used the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈, realize given variable condition to allow it.

In addition, the inertia phase in automatic speed changing part 20 speed-change processes, hybrid power control setup 52 is carried out the speed change of differential part 11.Carry out this speed change and carry out differential action to allow differential part 11, i.e. electric controlling stepless variable speed action is used for before and after automatic speed changing part 20 speed changes engine speed N _ERemain on substantially invariable level, and be not subjected to the rotational speed N of transferring elements 18 ₁₈The constraint how to change.For example, in inertia phase, hybrid power control setup 52 changes the speed ratio γ of differential part 11 in the opposite direction in the side that changes with the speed ratio γ of automatic speed changing part 20, makes engine speed N _ERemain on substantially invariable level.

Replacedly, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, sometimes, differential state determining apparatus 182 determines differential part 11 and is placed in non-stepless change state.When this takes place, the inertia phase in automatic speed changing part 20 speed-change processes, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈Perhaps engine speed N _EIn other words, executable operations makes the rotational speed N of transferring elements 18 ₁₈Realize given variable condition, perhaps make engine speed N _ERealize given variable condition.

Be similar to the input speed N of automatic speed changing part 20 _INGiven variable condition, employed here term " engine speed N _EGiven variable condition " be meant in advance the variable condition such as given rate of change that obtains by experiment, under the non-differential state of differential part 11, to make by the well-determined engine speed N of the speed ratio of vehicle velocity V and automatic speed changing part 20 _ERealize engine speed N _EPerfect condition.

For example, in the speed-change process of automatic speed changing part 20, along with engine speed N _ERate of change N _E' (=dN _E/ dt) increase, then obtain to have the quick speed change response of comfort.If rate of change N ₁₈' descend, then obtain to suppress easily the slow speed change response that speed change is impacted.In other words, shortening the effect that realizes combination between speed change time and the impact of inhibition speed change.

With the rotational speed N that mainly changes transferring elements 18 with the speed change of automatic speed changing part 20 by the joint action that discharges side engagement device and engage side coupling device ₁₈With engine speed N _EThe situation of (only under the non-differential state of differential part 11) is compared, and this allows the rotational speed N of transferring elements 18 ₁₈With engine speed N _EFurther near given variable condition.

In addition, hybrid power control setup 52 can mainly use the first electrical motor M1 and/or the second electrical motor M2 fully to change the rotational speed N of transferring elements 18 ₁₈Or engine speed N _E(only under the non-differential state of differential part 11).Control the activating pressure of coupling device with the variable speed control of carrying out and compare in considering differential part 11, this has further simplified control.

Here employed statement " mainly changes the rotational speed N of transferring elements 18 with the speed change of automatic speed changing part 20 by the joint action that discharges side engagement device and engage side coupling device ₁₈With engine speed N _E(only under the non-differential state of differential part 11) " be meant following situation.This is corresponding to following situation: adopt the activating pressure of determining equably in advance for example to make the rotational speed N of transferring elements 18 ₁₈Or engine speed N _E(only under the non-differential state of differential part 11) realizes given variable condition.

Like this, the inertia phase when differential part 11 is placed in the stepless change state in automatic speed changing part 20 speed-change processes, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈With engine speed N _EThis allows the rotational speed N of transferring elements 18 ₁₈Realize given variable condition, and with engine speed N _ERemain on substantially invariable level.On the contrary, the inertia phase when differential part 11 is placed in non-stepless change state in automatic speed changing part 20 speed-change processes, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈Or engine speed N _EThis allows the rotational speed N of transferring elements 18 ₁₈Or engine speed N _ERealize given variable condition.

Like this, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, being placed in the stepless change state based on differential part 11 also is non-stepless change state, and executable operations is to use the rotational speed N of the first electrical motor M1 and/or second electrical motor M2 change at inertia phase transferring elements 18 ₁₈Or engine speed N _EChanging method.

By discharging the bonding operation of side engagement device and engage side coupling device, use the activating pressure of determining equably in advance, step change control setup 54 is carried out the speed change of automatic speed changing parts 20, makes the rotational speed N of transferring elements 18 ₁₈Realize given variable condition.In this variable speed operation process, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈, make the rotational speed N of transferring elements 18 ₁₈Realize given variable condition.In addition, impact in order further to suppress speed change, the activating pressure of coupling device can Be Controlled, to allow the rotational speed N of transferring elements 18 ₁₈Further, perhaps compensate the operation of the first electrical motor M1 and/or the second electrical motor M2 near given variable condition.

More specifically, in the speed-change process of automatic speed changing part 20 (in the speed change transition period), activating pressure control setup 184 changes the activating pressure of the coupling device relevant with the speed change of automatic speed changing part 20.In other words, operate to control the release side engagement device relevant and the activating pressure of engage side coupling device with the speed change of automatic speed changing part 20.This activating pressure is followed the use first electrical motor M1 of hybrid power control setup 52 and/or the rotational speed N that the second electrical motor M2 changes transferring elements 18 ₁₈Work and change.

In addition, when being placed in non-stepless change state, speed-changing mechanism 10 in the speed-change process of automatic speed changing part 20 (in the speed change transition period), is similar to the rotational speed N of transferring elements 18 ₁₈, engine speed N _EUniquely determine based on the speed ratio γ of vehicle velocity V and automatic speed changing part 20.Therefore, by the activating pressure of the control coupling device relevant with the speed change of automatic speed changing part 20, activating pressure control setup 184 can change engine speed N _E

For example, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, sometimes, differential state determining apparatus 182 determines differential part 11 and is placed in the stepless change state.At this moment, the activating pressure of the coupling device that 54 controls of step change control setup are relevant with the speed change of automatic speed changing part 20, this activating pressure is used in the hydraulic pressure command (gear-shift command) of waiting to output to hydraulic control circuit 42.This activating pressure follows hybrid power control setup 52 to be used to use the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈Work and Be Controlled.

Make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, differential state determining apparatus 182 determines the on period differential part 11 that makes automatic speed changing part 20 carry out speed change at step change control setup 54 and is placed in non-stepless change state.At this moment, the activating pressure of the coupling device that 184 controls of activating pressure control setup are relevant with the speed change of automatic speed changing part 20, this activating pressure is used in to be treated to output in the hydraulic pressure command (gear-shift command) of hydraulic control circuit 42 by step change control setup 54.

This is because such control can make in the inertia phase of automatic speed changing part 20 speed-change processes, the rotational speed N of transferring elements 18 ₁₈Realize given speed change state, perhaps engine speed N _ERealize given variable condition.Use the first electrical motor M1 and/or the second electrical motor M2 to control the rotational speed N of transferring elements 18 at hybrid power control setup 52 ₁₈Or engine speed N _ETo achieve the working stage control activating pressure of given variable condition.

Torque descending control device 186 reduces the torque that is delivered to drive wheel 38 to be passed.For this reason, for example, motor torque decline control command is output to hybrid power control setup 52, be used to reduce electronic throttle 96 aperture, activate fuel injection valve 98 to reduce fuel duty and to activate ignition device 99 to postpone the point of ignition of driving engine 8, reduce motor torque T thus _EThis has realized being delivered to torque (the input torque T of automatic speed changing part 20 for example of drive wheel 38 _INWith output torque T _OUT) reduce.

In addition, except the motor torque control that descends, torque descending control device 186 with in conjunction with or independent mode to hybrid power control setup 52 output motor torque decline control commands.Such instruction allows the inverter 58 controls second electrical motor M2, with the torque of interim generation reverse drive or be used for to electrical storage device 60 electrically-charged regenerative brake torques.This feasible torque decline that is delivered to drive wheel 38 from the second electrical motor M2.

Switching control 50 switches to the step change state with differential part 11 (speed-changing mechanism 10) usually, to allow whole speed-changing mechanism 10 as a grade automatic transmission with hydraulic torque converter is arranged.For example, when step change control setup 54 is carried out upgrading of automatic speed changing part 20, thereupon, the input speed N of automatic speed changing part 20 _IN(the rotational speed N of transferring elements 18 just ₁₈) change.In so-called like this inertia phase, follow engine speed N _EReduce and show as torque increment, the input torque T of the torque that is delivered to drive wheel 38 from driving engine 8 interim let-loose energies _INTorque increment or output torque T _OUTTorque increment.So-called like this inertia torque may cause that speed change takes place impacts.

Replacedly, for example, inertia phase in the speed-change process of the automatic speed changing part 20 that begins by step change control setup 54, the rotating speed of at least one descends among second rotating element RE2 of differential part 11 and the 4th to the 8th rotating element RE4 to RE8 of three element element RE3 and/or automatic speed changing part 20.This decline of rotating speed causes that inertia torque occurs as the torque increment of the torque that is delivered to drive wheel 38, causes speed change to be impacted.

In addition, speed-changing mechanism 10 is switched to the stepless change state to allow whole speed-changing mechanism 10 as under the situation of toric transmission at switching control 50, for example step change control setup 54 carries out the speed change of automatic speed changing part 20.Hybrid power control setup 52 is carried out the speed change of differential part 11, changes with the overall ratio γ T that avoids speed-changing mechanism 10 before and after the speed change of automatic speed changing part 20, perhaps makes this minimize variations in the continually varying mode.In such speed-change process, engine speed N _EDo not change, perhaps engine speed N _EVariation be minimized.

But, even in this state, if automatic speed changing part 20 is carried out speed change, then the inertia phase that takes place in this speed-change process makes that the rotating speed of at least one descends among the 4th to the 8th rotating element RE4 to RE8 of the second rotating element RE2 of differential part 11 and three element element RE3 and/or automatic speed changing part 20.This decline of rotating speed causes that inertia torque occurs as the torque increment of the torque that is delivered to drive wheel 38, causes speed change to be impacted.

In the speed-change process of the automatic speed changing part of implementing by step change control setup 54 20, torque descending control device 186 can reduce to be delivered to the torque of drive wheel 38, for example, and the input torque T of automatic speed changing part 20 _INWith output torque T _OUTMore specifically, torque descending control device 186 is for example eliminated input torque T _INWith output torque T _OUTIn the torque component that is equal to inertia torque, minimize the speed change that causes by inertia torque thus and impact.For this reason, can be separately or carry out motor torque control or the motor torque control that descends that descends in combination, reduce to be delivered to the torque of drive wheel 38 thus.In the inertia phase of automatic speed changing part 20 speed-change processes, torque descending control device 186 can reduce torque.

In addition, replace above-mentioned functions or be additional to above-mentioned functions, torque descending control device 186 is used for eliminating to a certain extent the function of torque fluctuation, and the finishing of joint that this torque fluctuation is accompanied by the coupling device that is started by step change control setup 54 taken place.This torque that causes being delivered to drive wheel 38 descends, and joint impact is minimized.

Like this, torque descending control device 186 reduces input torque T _INTo eliminate and the corresponding torque component of inertia torque, this inertia torque is in automatic speed changing part 20 inertia torque that the rotating speed speed change by the rotating element in the automatic speed changing part 20 causes to take place under the situation of speed changes, and perhaps this inertia torque is that rotating speed by the rotating element in the differential part 11 (comprises engine speed N _E) change the inertia torque cause.Simultaneously or respectively, finish the torque fluctuation that causes by the joint of the coupling device of automatic speed changing part 20 and be eliminated to a certain extent,, impact thereby suppress speed change in this way to minimize joint impact.

The diagram of circuit of Figure 25 illustrates the main portion of the Control work of being carried out by electronic control package 40, just the variable speed control work of being carried out by automatic speed changing part 20.This treating process repeated with the extremely short cycle (about several milliseconds to a few tens of milliseconds magnitude).

The control of carrying out owing to as shown in figure 25 diagram of circuit in differential part 11 is placed in stepless change state following time, and under Control work same as shown in Figure 13, automatic speed changing part 20 is carried out " 2 grades → 3 grades " and upgraded.Be placed in stepless change state following time in differential part 11, under Control work same as shown in Figure 14, automatic speed changing part 20 is carried out " 3 grades → 2 grades " and is slided and lower category.Be placed in stepless change state following time in differential part 11, under Control work same as shown in Figure 15, automatic speed changing part 20 is carried out " 3 grades → 2 grades " and is slided and lower category.Be placed in step change state (lock-out state) following time in differential part 11, under Control work same as shown in Figure 16, automatic speed changing part 20 is carried out " 2 grades → 3 grades " and is upgraded.Be placed in step change state (lock-out state) following time in differential part 11, under Control work same as shown in Figure 17, automatic speed changing part 20 is carried out " 3 grades → 2 grades " and is slided and lower category.

At first, with step change control setup 54 cooresponding step SC1 in, judge in the automatic speed changing part 20 whether carry out speed change.For example, this judgement depend on treat in the automatic speed changing part 20 speed change to gear whether be according to vehicle velocity V with by the output torque T of automatic speed changing part 20 _OUTThe vehicle condition of expression is determined with reference to speed change figure shown in Figure 6.

If in step SC1, make sure judgement, then with differential state determining apparatus 182 cooresponding step SC2 in, judge whether power splitting mechanism 16 is placed in the differential state, perhaps whether differential part (stepless change part) 11 is placed in the stepless change state.For example, based on vehicle condition and with reference to speed change figure shown in Figure 6, this judgement depends on differential part 11 and whether is placed in the stepless change state and carries out, and this depends on whether be in the stepless change zone that makes speed-changing mechanism 10 place the stepless change state again.

If in step SC2, make sure judgement, then with step change control setup 54 cooresponding step SC3 in, gear-shift command (hydraulic pressure command) is output to hydraulic control circuit 42, is used for making automatic speed changing part 20 speed changes to the gear of determining at step SC1.The hydraulic pressure value that is used in this hydraulic pressure command is the activating pressure value of being determined equably in advance, and it makes the rotational speed N of transferring elements 18 ₁₈Realize given variable condition.

The timing that moment t1 among Figure 13 is expressed as follows: remain on stepless change state (differential state) following time in differential part (stepless change part) 11, automatic speed changing part 20 speed changes to the gear-shift command of third gear is output, to begin to reduce release hydraulic pressure P as the second drg B2 that discharges the side engagement device _B2In the time period from t1 to t3, as the engagement hydraulic P of the first drg B1 of engage side coupling device _B1Raise, and at moment t3, the joint action of the first drg B1 is finished, to finish a series of variable speed operations.Transition hydraulic pressure in the release side engagement device and the transition hydraulic pressure in the engage side coupling device are preestablished.

The timing that moment t1 among Figure 14 is expressed as follows: remain on stepless change state (differential state) following time in differential part (stepless change part) 11, the gear-shift command of automatic speed changing part 20 speed change to the second gears is output, to begin to reduce release hydraulic pressure P as the first drg B1 that discharges the side engagement device _B1In the time period from t1 to t4, as the engagement hydraulic P of the second drg B2 of engage side coupling device _B2Raise, and at moment t4, the joint action of the second drg B2 is finished, to finish a series of variable speed operations.Transition hydraulic pressure in the release side engagement device and the transition hydraulic pressure in the engage side coupling device are preestablished.

For example, as shown in figure 15, begin timing, export high hydraulic pressure command, be used for clogging immediately back clearance with activating oil filling engage side coupling device fast to the coupling device sap pressure supply at the engage side coupling device.At this moment, if intactly engage the engage side coupling device continuously, then be easy to take place joint impact with so high hydraulic pressure.

Beginning among the decision maker 180 corresponding subsequent step SC4 with inertia phase, judging whether inertia phase begins in the speed-change process of automatic speed changing part 20.This judgement depends on any in the factor.First factor depends on the actual speed N of the second electrical motor M2 _M2Whether changed the specified rate that definite inertia phase begins that is used for that obtains by experiment in advance.Second factor depends on the definite engage side coupling device that is used for that whether has passed through to obtain by experiment in advance and begins to have the given interval of engagement torque capacity.Whether the engagement hydraulic that the 3rd factor depends on the engage side coupling device reaches joint transition hydraulic pressure (instruction) the value Pc that obtains by experiment in advance, and this value conduct is used to determine to have hydraulic pressure (instruction) value of engagement torque capacity.

If in step SC4, make negative judgement, the then operation among the repeated execution of steps SC4.If in step SC4, make sure judgement, then with hybrid power control setup 52 cooresponding step SC5 in, executable operations changes the rotational speed N of transferring elements 18 to use the first electrical motor M1 and/or the second electrical motor M2 ₁₈With engine speed N _EThis allows differential part 11 to carry out differential action, just carries out the electric controlling stepless variable speed action, with engine speed N _ERemain on substantially invariable level, make the rotational speed N of transferring elements 18 ₁₈Realize given variable condition.

For example, differential part 11 carry out speed change with the direction that changes in the opposite direction of the speed ratio γ of automatic speed changing part 20 on change speed ratio γ 0.This allows engine speed N _ERemain on substantially invariable level, and change the rotational speed N of transferring elements 18 ₁₈To realize given variable condition.In the operation of step SC3 to SC5, the overall ratio γ T of speed-changing mechanism 10 continuously changes before and after automatic speed changing part 20 speed changes.In addition, in step SC5, can judge the beginning of inertia phase, in this case, not need execution in step SC4.

T2 among Figure 13 and the time period between the t3 and the t2 among Figure 14 and the time period between the t4 are illustrated in the inertia phase that takes place in the speed-change process of automatic speed changing part 20, and differential part 11 is carried out differential action to control the rotational speed N of the first electrical motor M1 _M1Thereby, make differential part 11 on the direction that the speed ratio with automatic speed changing part 20 changes in the opposite direction, make gear ratio change and the corresponding amount of this gear ratio change.In such time period, before and after automatic speed changing part 20 speed changes, differential part 11 is carried out differential action and is changed overall ratio γ T to prevent automatic speed changing part 20, just makes engine speed N _ERemain on the level of basic fixed.In inertia phase, be synchronized with inertia phase basically since moment t2, follow the speed change of automatic speed changing part 20, change the rotational speed N of transferring elements 18 with the second electrical motor M2 ₁₈, to make it having given variable condition.

If in step SC2, make negative judgement, then with step change control setup 54 corresponding step SC7 in, make the gear-shift command (hydraulic pressure command) of automatic speed changing part 20 speed changes to hydraulic control circuit 42 output to the gear of in step SC1, determining.The hydraulic pressure value that is used in this hydraulic pressure command is the activating pressure value of being determined equably in advance, and this value makes the rotational speed N of transferring elements 18 ₁₈Realize given variable condition.

The timing that moment t1 among Figure 16 is expressed as follows: at this moment, remain under the situation of non-stepless change state (lock-out state) in differential part (stepless change part) 11, automatic speed changing part 20 speed changes to the gear-shift command of third gear is output, to begin to reduce release hydraulic pressure P as the second drg B2 that discharges the side engagement device _B2In the time period from t1 to t3, as the engagement hydraulic P of the first drg B1 of engage side coupling device _B1Raise, at moment t3, the joint action of the first drg B1 is finished, to finish a series of variable speed operations.Transition hydraulic pressure in the release side engagement device and the transition hydraulic pressure in the engage side coupling device are by predefined.

In addition, in the embodiment shown in Figure 16, because differential part 11 upgrades under the engaged lock-out state of switch clutch C0 therein, so speed-changing mechanism 10 is on the whole as step change transmission.Therefore, under vehicle velocity V keeps constant situation, make the input speed N of automatic speed changing part 20 _IN(the rotational speed N of transferring elements 18 ₁₈) along with from t2 to upgrading and reduce shown in the t3 time period, also cause engine speed N simultaneously _EReduce.When this takes place, in inertia phase, be synchronized with inertia phase basically since moment t2, use the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of the transferring elements 18 that changes along with the speed change of automatic speed changing part 20 ₁₈And/or engine speed N _E, to achieve given variable condition.

The timing that moment t1 among Figure 17 is expressed as follows: at this moment, remain under the situation of non-stepless change state (lock-out state) in differential part (stepless change part) 11, the gear-shift command that makes automatic speed changing part 20 set up second gear is output, and conduct discharges the engagement hydraulic P of the first drg B1 of side engagement device _B1Begin to descend.In the time period from t1 to t4, as the engagement hydraulic P of the second drg B2 of engage side coupling device _B2Raise, at moment t4, the joint action of the second drg B2 is finished, to finish a series of variable speed operations.

In the time period from t1 to t4, discharge transition hydraulic pressure in the side engagement device and the transition hydraulic pressure in the engage side coupling device by predefined, make the rotational speed N of transferring elements 18 ₁₈Realize given variation, perhaps engine speed N _EHas given variable condition.For example, be similar to embodiment shown in Figure 14, when coupling device begins to be supplied hydraulic pressure, export high hydraulic pressure value instruction.In the timing that engages beginning, the low hydraulic pressure value instruction of output.Afterwards, output reaches hydraulic pressure to be used to the hydraulic pressure value instruction of the hydraulic pressure value of finishing joint.

In addition, in the embodiment shown in Figure 17, because differential part 11 is carried out speed change under the engaged lock-out state of switch clutch C0 therein, institute is so that speed-changing mechanism 10 is used as step change transmission on the whole.Therefore, under vehicle velocity V keeps constant situation, shown in the time period from t2 to t4, make the input speed N of automatic speed changing part 20 _IN(the rotational speed N of transferring elements 18 ₁₈) increase along with lowering category, also make engine speed N simultaneously _EIncrease.When this takes place, in inertia phase, be synchronized with inertia phase basically since moment t2, use the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of the transferring elements 18 that changes along with the speed change of automatic speed changing part 20 ₁₈And/or engine speed N _E, to achieve given variable condition.

In the speed-change process of step SC3 to SC5 or in the speed-change process of step SC7, with torque descending control device 186 corresponding step SC6 in, carry out torque and descend control to cause the torque that is delivered to drive wheel 38 (the input torque T of automatic speed changing part 20 for example _INOr output torque T _OUT) decline.

Along with the rotating speed reduction of the rotating element that forms automatic speed changing part 20 and the rotating speed reduction that forms the rotating element of differential part 11, inertia torque occurs as the torque increment of the torque that is delivered to drive wheel 38, for example output torque T _OUTTorque increment.Replacedly, along with engine speed N in the upshift operation process _EReduction, inertia torque occurs as the torque increment of the torque that is delivered to drive wheel 38, for example output torque T _OUTTorque increment.Replacedly, in the speed-change process of automatic speed changing part 20, may finish the torque fluctuation that is caused joint impact takes place owing to the joint of coupling device.

Therefore, in step SC6, carry out torque and descend control to allow eliminating (just absorbing to a certain extent) and the corresponding torque component of inertia torque that causes to a certain extent.Replacedly, carry out the torque control that descends and eliminate to a certain extent owing to the joint of coupling device is finished the torque fluctuation that causes allowing, suppress joint impact thus.For example, executable operations is used to reduce motor torque T to use the first electrical motor M1 and/or second electrical motor M2 independence or combination _EMotor torque control or the motor torque control that descends that descends.This torque that causes being delivered to drive wheel 38 reduces.But, in the process of lowering category, just be released and the sliding in the process of lowering category of car retardation operation at acceleration pedal, do not carry out the torque control that descends, therefore do not need execution in step SC6.

In time period in Figure 13 between t2 and the t3, engine speed N _EVariation in speed-change process, be suppressed.This allows to eliminate to a certain extent and the corresponding torque component of inertia torque (this inertia torque occurs as the torque increment of the torque that is delivered to drive wheel 38).Torque increment stems from the rotation speed change of the rotating element of the rotation speed change of rotating element of automatic speed changing part 20 or differential part 11.In other words, torque decline control has been carried out in this expression.

In addition, if make negative judgement in step SC1, then in step SC8, each control setup of electronic control package 40 is carried out Control work, is used for not carrying out speed change or stopping current routine in automatic speed changing part 20.For example, when speed-changing mechanism 10 was placed in the stepless change state, hybrid power control setup 52 carried out the speed change of differential part 11 based on vehicle condition.

In illustrated embodiment, as mentioned above, in the speed-change process of automatic speed changing part 20, hybrid power control setup 52 allows to use the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 when differential part 11 is placed in the stepless change state ₁₈, to realize given variable condition.Thus, make rotational speed N by the well-determined transferring elements 18 of speed ratio γ of vehicle velocity V and automatic speed changing part 20 ₁₈Realize given variable condition.

This provides the balance between fast speed change response and the slow speed change response, in fast speed change response, and rate of change N ₁₈' increase (it is considered to for example have comfortable sensation), in slow speed change response, rate of change N ₁₈' reduce (its be considered to suppress easily speed change impact).In other words, set up given variable condition (for example given rate of change) between shortening speed change time and the impact of inhibition speed change, to provide balance.

In addition, in illustrated embodiment, be placed in differential part 11 under the situation of stepless change state in the speed-change process of automatic speed changing part 20, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to make engine speed N _ERemain on substantially invariable level, change overall ratio γ T thus continuously.With engine speed N _EThe result that discontinuous variation realizes when promptly having level to change compares, and this has further suppressed the speed change impact.

In addition, in illustrated embodiment, be placed in differential part 11 under the situation of non-stepless change state in the speed-change process of automatic speed changing part 20, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 with given variable condition ₁₈Or engine speed N _EThis allows the rotational speed N of transferring elements 18 ₁₈Or engine speed N _E(both determines by the speed ratio γ of vehicle velocity V and automatic speed changing part 20 is unique) realizes given variable condition.

This is in quick speed change response and provide balance between the speed change response at a slow speed, in speed change responds fast, and the rate of change N of transferring elements 18 ₁₈' or engine speed N _ERate of change N _E' increase (it is considered to for example have comfortable sensation), in speed change responds at a slow speed, rate of change N ₁₈' or rate of change N _E' reduce (its be considered to suppress easily speed change impact).In other words, set up given variable condition (for example given rate of change) between shortening speed change time and the impact of inhibition speed change, to provide balance.

In addition, in illustrated embodiment, in the speed-change process of automatic speed changing part 20, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N that is used to make transferring elements 18 ₁₈Perhaps engine speed N _EThe method that changes.Such change is based on differential part 11 and places the also non-stepless change state of stepless change state and carry out.

Automatic speed changing part 20 is carried out speed change, also is two relevant factors of non-stepless change state according to partly placing the stepless change state with differential just, uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈, suppress that thus speed change takes place and impact.Under the former state, in the speed-change process of automatic speed changing part 20, engine speed N _EOwing to the electric controlling stepless variable speed effect changes, and be not subjected to rotational speed N by the well-determined transferring elements 18 of speed ratio γ of vehicle velocity V and automatic speed changing part 20 ₁₈Constraint.Under the latter's state, compare with the situation of stepless change state, because engine speed N _EVariation further increase, so the amplitude of inertia also increases.

In addition, in illustrated embodiment, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈Perhaps engine speed N _E, make rotational speed N ₁₈Or engine speed N _ERealize given variable condition.Except such operation, the activating pressure of the coupling device that 184 controls of activating pressure control setup are relevant with the speed change of automatic speed changing part 20 is to allow rotational speed N ₁₈Perhaps engine speed N _ERealize given variable condition (only being placed under the situation of non-stepless change state) in differential part 11.Such speed change state is meant wherein and is shortening the speed change state that balance is provided between speed change time and the impact of inhibition speed change.This has further suppressed the speed change impact.

＜embodiment 5 〉

In above-mentioned illustrated embodiment, place in differential part 11 under the situation of stepless change state, step change control setup 54 allows automatic speed changing part 20 to carry out speed change, makes to suppress the speed change impact and improve consumption of fuel.For this reason, hybrid power control setup 52 allows differential part 11 to carry out speed change, to change overall ratio γ T continuously before and after speed change, just with engine speed N _ERemain on substantially invariable level.In such operation, even under the situation that overall ratio γ T significantly changes before and after speed change, differential part 11 is carried out speed change in the following manner.In other words, differential part 11 is carried out speed change to keep engine speed N _ESubstantially constant.Then, differential part 11 is carried out further speed change, continuously changes overall ratio γ T with head for target overall ratio γ T.

But in this case, there is following consideration mode in the user: discontinuous change overall ratio γ T but step by step (discontinuous) to change overall ratio γ T be more comfortable to improve the speed change response.

For example, under automatic speed changing part 20 is carried out the situation of speed change (wherein the variation of vehicle velocity V occurs as the transition " a  b " shown in the solid line B among Fig. 6), overall ratio γ T changes among a small circle, and perhaps before and after automatic speed changing part 20 speed changes, overall ratio γ T changes hardly.Thus, have precedence over and improve the speed change response, hope can suppress the speed change impact better or improve consumption of fuel.

But, shown in the transition on the solid line among Fig. 6 " C " " c  d ", along with acceleration pedal is depressed or rapid release fast, the output torque T that needs _OUTIn change, and automatic speed changing part 20 is often carried out speed change.In this case, the overall ratio γ T before and after the speed change of automatic speed changing part 20 has bigger variation range than the situation shown in the solid line B.Therefore, have following consideration mode: have precedence in the speed change front and back of automatic speed changing part 20 and continuously change overall ratio γ T to suppress speed change impact and improvement consumption of fuel, better mode is that (discontinuous) change overall ratio γ T responds to improve speed change step by step.

In other words, before and after automatic speed changing part 20 speed changes, when overall ratio γ T in minimized variation range, change or overall ratio γ T almost when changing, have precedence over and improve the speed change response, overall ratio γ T can change continuously to suppress speed change and impacts and improve consumption of fuel.In addition, before and after automatic speed changing part 20 speed changes, when changing in the variation range that overall ratio γ T is increasing, overall ratio γ T can change step by step, rather than continuously changes, and is used to provide the speed change response.

From another perspective, for example, if before and after automatic speed changing part 20 speed changes, acceleration pedal be depressed or release so that overall ratio γ T on the variation range that increases, change.In this case, when changing (in other words with so-called jump gear shift mode variation) when overall ratio γ T has level, think that the user feels comfortable.For this reason, use step by step the speed ratio γ of the automatic speed changing part 20 of (level is promptly arranged) variation to change overall ratio γ T step by step.

Therefore, in illustrated embodiment, before and after automatic speed changing part 20 speed changes, under situation about changing in the variation range that overall ratio γ T is increasing, except the operation that illustrates in the foregoing description, differential part 11 executable operations are to change overall ratio γ T before and after relevant speed change.Below, this Control work will be described.

The functional block diagram of Figure 26 shows the main portion of the controllable function of being carried out by electronic control package 40.The main difference of Figure 26 and Fig. 5 is that speed-changing mechanism 10 comprises that also speed ratio changes decision maker 188, and it is used for judging the variation of overall ratio γ T under the situation of determining automatic speed changing part 20 speed changes.

In Figure 26, except above-mentioned function, the function of hybrid power control setup 52 below the on period that step change control setup 54 makes automatic speed changing part 20 carry out speed change is carried out.In other words, when changing when differential state determining apparatus 182 judges that differential parts 11 are placed in the stepless change state and in the variation range that increasing of overall ratio γ T, (just being independent of the speed change of automatic speed changing part 20) carries out the speed change of differential part 11 separately.Like this, overall ratio γ T head for target value is changed.In other words, the variation according to the speed ratio γ of automatic speed changing part 20 is not synchronized with the speed ratio γ 0 that its speed change changes differential part 11, is used for continuously changing thus overall ratio γ T.

According to this variation, can use the level variation that has of the speed ratio of automatic speed changing part 20 to add that simultaneously the speed ratio variation of (perhaps deducting) differential part 11 comes to change overall ratio γ T towards expected value.This causes the ability that changes overall ratio γ T before and after automatic speed changing part 20 speed changes step by step, has improved the speed change response thus.

For example, statement " overall ratio γ T changes in the variation range that increases " is meant following situation: in the mode shown in the transition on the solid line C among Fig. 6 " c  d ", acceleration pedal is significantly depressed or is discharged.In this case, target overall ratio γ T is considered to surpass the variation range given value.Then, make the discontinuous variation of overall ratio γ T, in other words, overall ratio γ T is changed with the jump gear shift mode that changes step by step.Here employed term " given value " expression is the value of property acquisition by experiment in advance, its be used for determining discontinuous for the user change target overall ratio γ T but step by step (that is, in discrete mode) change this speed ratio γ T and be considered to feel comfortable.

Be placed in differential part 11 under the situation of stepless change state, if determine the carrying out of the speed change of automatic speed changing part 20, then speed ratio changes decision maker 188 judgement overall ratio γ T existence variations.For example, determine to treat in the automatic speed changing part 20 gear that speed change arrives as level speed-change control device 54 based on vehicle condition and with reference to speed change figure shown in Figure 6, and differential state determining apparatus 182 is judged when differential part 11 is placed in the stepless change state, produces such stage.

For example, be placed in differential part 11 under the situation of stepless change state, if go out to determine the carrying out of the speed change of automatic speed changing part 20, then whether speed ratio changes decision maker 188 and judges and promptly to carry out so-called jump speed change to change overall ratio γ T step by step by the non-overall ratio γ T that infinitely changes.Such judgement depend on whether acceleration pedal is depressed significantly or release so that target overall ratio γ T in than the big variation range of above-mentioned given value, change, as the transition on the solid line C among Fig. 6 " c  d ".

Thereby, judge and do not have the jump speed change that then hybrid power control setup 52 is carried out the speed change of differential parts 11 if speed ratio changes decision maker 188, with before and after speed change with engine speed N _ERemain on substantially invariable level, make overall ratio γ T change continuously.In addition,, speed ratio judges and has the jump speed change that then hybrid power control setup 52 speed change that is independent of automatic speed changing part 20 is carried out the speed change of differential part 11, to change overall ratio γ T step by step if changing decision maker 188.

When differential part 11 is placed in the stepless change state in the speed-change process of automatic speed changing part 20, according to having suppressed engine speed N _EVariation a kind of speed change and have an engine speed N _EThe another kind of speed change of variation, engine speed changes in different variation ranges with the rotating speed of the rotating element that forms differential part 11.The former represents wherein overall ratio γ T continually varying speed change, and the latter represents that the wherein discontinuous variation of overall ratio γ T is just with the speed change of jump gear shift mode.

In other words, engine speed N in speed-change process _EIn the jump speed change that changes with the rate of change that increases, compare, may produce bigger inertia torque with overall ratio γ T continually varying situation.Therefore, if the engagement hydraulic of relevant with the speed change of automatic speed changing part 20 as mentioned above coupling device is that homogeneous is set for the continuous variation of overall ratio γ T and jump speed change, the rotational speed N of transferring elements 18 then ₁₈Become and be difficult to realize given variable condition.This makes the possibility increase that speed change is impacted takes place.

Consider above-mentioned situation, judge differential parts 11 when differential state determining apparatus 182 and be placed in stepless change state following time, in the speed-change process of the automatic speed changing part of being implemented by step change control setup 54 20, hybrid power control setup 52 carries out following function.In other words, the inertia phase in automatic speed changing part 20 speed-change processes, hybrid power control setup 52 allows the rotational speed N of transferring elements 18 ₁₈Change to be realizing given variable condition, and is not subjected to speed ratio to change decision maker 188 about whether there being the constraint of the result of determination of jump speed change.Carry out this operation in the mode identical with carrying out the foregoing description.In this operating process, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2.

Thereby, being placed in the stepless change state so that the inertia phase in the speed-change process of overall ratio γ T automatic speed changing part 20 when continuously changing in differential part 11, hybrid power control setup 52 carries out following function.In other words, hybrid power control setup 52 changes rotational speed N ₁₈With engine speed N _E, make rotational speed N ₁₈Realize given variable condition and engine speed N _ERemain on substantially invariable level.At this moment, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2.

On the contrary, be placed in inertia phase in the speed-change process of stepless change state and overall ratio automatic speed changing part 20 when having level to change in differential part 11, hybrid power control setup 52 carries out following function.In other words, hybrid power control setup 52 speed change that is independent of automatic speed changing part 20 changes engine speed N _E, to allow the rotational speed N of transferring elements 18 ₁₈Realize given variable condition, make overall ratio γ T head for target overall ratio γ T have level to change simultaneously.At this moment, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2.

Be placed in the speed-change process of the automatic speed changing part 20 that starts by step change control setup 54 under the situation of stepless change state in differential part 11, the inertia phase in the speed-change process of automatic speed changing part 20, hybrid power control setup 52 changes rotational speed N ₁₈Or engine speed N _EChanging method, the method for differential part 11 speed changes just.This change is based on speed change and is performed as and continuously changes overall ratio γ T and still have level to change an overall ratio γ T with the jump gear shift mode to make.

The diagram of circuit of Figure 27 illustrates the main portion of the Control work of electronic control package 40, just treats the variable speed control work of being carried out by differential part (stepless change part) 11 in the speed-change process of automatic speed changing part 20.This treating process repeated with the extremely short cycle (for example several milliseconds to a few tens of milliseconds magnitude).In addition, expression is that with the Figure 27 and the different of Figure 25 of the corresponding view of Figure 25 operating process also comprises step SD11 and step SD12 and SD13, in step SD11, be placed in differential part 11 and judge the jump speed change under the situation of stepless change state, in step SD12 and SD13, speed-changing mechanism 10 is carried out speed change when determining the jump speed change.

The time diagram of Figure 15 is used to illustrate the Control work shown in the diagram of circuit shown in Figure 27, the pending Control work of its expression is connected to the power of second gear and is lowered category and realize step change to make automatic speed changing part 20 carry out third gear when differential part 11 is placed in the stepless change state.

At first, with step change control setup 54 corresponding step SD1 in, treat the gear that speed change arrives in the automatic speed changing part 20 based on whether determining, judge whether the speed change of automatic speed changing part 20 carries out.This judgement is based on the speed of a motor vehicle and by the output torque T of automatic speed changing part 20 _OUTThe vehicle condition of expression and reference speed change figure shown in Figure 6 carry out.Moment t1 among Figure 15 represents to determine third gear lowering category to second gear.

If in step SD1, make sure judgement, then with differential state determining apparatus 182 cooresponding step SD2 in, judge whether power splitting mechanism 16 is placed in the differential state, just whether differential part (stepless change part) 11 is placed in the stepless change state.More specifically, based on vehicle condition and reference example speed change figure as shown in Figure 6, this judgement depends on and whether is in the stepless change zone that makes speed-changing mechanism 10 place the stepless change state and carries out.

If in step SD2, make sure judgement, then changing among the decision maker 188 corresponding step SD11 with speed ratio, whether the judgement acceleration pedal is depressed dearly or is discharged, shown in the transition on the solid line C among Fig. 6 " c  d ", under so-called jump speed change state, to carry out speed change.Here employed term " jump speed change " is meant wherein and surpasses given value and make the speed change state of overall ratio γ T with the discontinuous variation of jump gear shift mode for the variation range that allows target overall ratio γ T.

If in step SD11, make sure judgement, then with step change control setup 54 cooresponding step SD12 in, gear-shift command (hydraulic pressure command) is output to hydraulic control circuit 42, is used for making automatic speed changing part 20 to treat that speed change is to the target gear of determining in step SD1.The hydraulic pressure value that is used in this hydraulic pressure command is meant following hydraulic pressure value, and it is set at the rotational speed N that makes transferring elements 18 by homogeneous in advance ₁₈For example in speed-change process, realize given variable condition.

The timing that moment t1 among Figure 15 is expressed as follows: at this moment, under the stepless change state (differential state) of differential part (stepless change part) 11, the gear-shift command of automatic speed changing part 20 speed change to the second gears is output, as the release hydraulic pressure P of the first drg B1 that discharges the side engagement device _B1Descend.In the time period from t1 to t4, as the engagement hydraulic P of the second drg B2 of engage side coupling device _B2Raise, at moment t4, the joint of the second drg B2 is finished, to finish the speed change of automatic speed changing part 20.

For example, be similar to Figure 14 and embodiment shown in Figure 17, high hydraulic pressure value instruction is exported in the timing that begins to be supplied to the engage side coupling device at hydraulic pressure.In the timing that engages beginning, the low hydraulic pressure value instruction of output, the hydraulic pressure value instruction that output afterwards increases the hydraulic pressure of hydraulic pressure value when joint is finished gradually.

With the basic while of step SD12, with hybrid power control setup 52 corresponding step SD13 in, the level that has of the speed ratio that speed change caused by utilizing the automatic speed changing part 20 carry out in step SD12 changes, with the transmission synchronization of automatic speed changing part 20, differential part 11 is not carried out speed change independently.Such speed change is performed as and allows head for target overall ratio γ T to control actual overall ratio γ T.In step SD12 and SD13, carry out so-called jump speed change, to allow changing overall ratio γ T step by step.

In addition, in the embodiment shown in fig. 15, after moment t1, the rotational speed N of the first electrical motor M1 _M1Raise, so that the speed ratio γ 0 of differential part increases, engine speed N thus raises _EThereby, the input speed N of automatic speed changing part 20 _IN(the rotational speed N of transferring elements 18 ₁₈) increase along with lowering category of automatic speed changing part 20.In addition, in the rotational speed N of the first electrical motor M1 _M1Keep under the substantially invariable situation engine speed N _EIncrease.Because the differential action of differential part 11, differential part 11 uses the first electrical motor M1 to carry out speed change at least, regulates overall ratio γ T to allow differential part 11 final head for target overall ratio γ T.

Like this, according to the illustrated embodiment that belongs to the jump speed change, overall ratio γ T discontinuous (level is arranged) is changed.For this reason, differential part 11 is carried out speed change with the speed change of automatic speed changing part 20 asynchronously, because the level that has of the speed ratio that speed change causes changes, makes overall ratio γ T near target overall ratio γ T to utilize, i.e. engine speed N to be achieved after speed change _EThis makes the speed change response improve.In addition, can use the second electrical motor M2 to be synchronized with the rotational speed N that energetically change the transferring elements 18 that along with the speed change of automatic speed changing part 20 change of inertia phase basically since moment t2 ₁₈, so that it is near given variation.

If make in step SD11 negates to judge, then with step change control setup 54 corresponding step SD3 in, make automatic speed changing part 20 speed changes in step S1 the gear-shift command (hydraulic pressure command) of determined gear be output to hydraulic control circuit 42.The hydraulic pressure value that is used in this hydraulic pressure command is meant following activating pressure, and it is specified to the feasible for example rotational speed N of transferring elements 18 in speed-change process in advance equably ₁₈Realize given variation.

Beginning among decision maker 180 and the hybrid power control setup 52 corresponding subsequent step SD5 with inertia phase, judging whether inertia phase begins in the speed-change process of automatic speed changing part 20.If determine the beginning of inertia phase, then make the rotational speed N of transferring elements 18 ₁₈Realize given variable condition, and make engine speed N by the differential action (electric controlling stepless variable speed effect just) of differential part 11 _ERemain on substantially invariable level.

For this reason, use the first electrical motor M1 and/or the second electrical motor M2 to change rotational speed N ₁₈With engine speed N _EFor example, make in the differential part 11 speed ratio γ 0 with automatic speed changing part 20 in the side that changes of speed ratio γ change in the opposite direction, make the rotational speed N of transferring elements 18 ₁₈Realize given variable condition and engine speed N _ERemain on substantially invariable level.In step SD3 and SD5, before and after automatic speed changing part 20 speed changes, the overall ratio γ T in the speed-changing mechanism 10 continuously changes.

If in step SD2, make negative judgement, then with step change control setup 54 corresponding step SD7 in, make the gear-shift command (hydraulic pressure command) of automatic speed changing part 20 speed changes to hydraulic control circuit 42 output to the gear of in step SC1, determining.The hydraulic pressure value that is used in this hydraulic pressure command is the activating pressure value of being determined equably in advance, the feasible for example rotational speed N of transferring elements 18 in speed-change process of this value ₁₈Realize given variation.

If make negative judgement in step SD1, then in step SD8, each control setup of electronic control package 40 is carried out Control work, with the speed change that do not cause automatic speed changing part 20 or stop current routine.For example, if speed-changing mechanism 10 is placed in the stepless change state, then hybrid power control setup 52 is carried out the speed change of automatic speed changing part 20 based on vehicle condition.

In addition, in the speed change of step SD3 and SD5, in the speed change of step SD7 or in the speed change of step SD12 and SD13, with torque descending control device 186 corresponding step (not shown) in, can carry out the torque control that descends.Be similar to the step SC6 among Figure 25, this torque that causes being delivered to drive wheel 38 (is input torque T _INOr output torque T _OUT) decline.

The time diagram of Figure 15 illustrates owing to existing power to connect and lowers category, at the final stage input torque T of speed change _INReduce to a certain extent eliminating torque fluctuation, this torque fluctuation is in the time period from t3 to t5 because coupling device (having the lock-out state under the free-wheel clutch situation) joint of automatic speed changing part 20 is finished causes, and suppresses joint impact thus.

As mentioned above, except shown those effects of the foregoing description, present embodiment also has other following effects.Particularly, speed change is used to make the discontinuous variation of overall ratio γ T to be used to make overall ratio γ T to change still continuously according to speed change, and hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 to change the rotational speed N of transferring elements 18 ₁₈Perhaps engine speed N _EChanging method.

Continuously change overall ratio γ T can suppress engine speed N according to being used to _EThe speed change that changes and be used for discontinuous change overall ratio γ T and engine speed N _ESpeed change with variation, this allows automatic speed changing part 20 to use the first electrical motor M1 and/or the second electrical motor M2 to carry out speed change.In other words, in the speed-change process of differential part 11, may take place to make speed ratio γ T continually varying speed change under the situation of amplitude difference of inertia torque, and carry out the speed change of automatic speed changing part 20 according to the speed change that changes in discontinuous mode.This has suppressed the generation that speed change is impacted.

Although in aforementioned description, the embodiment shown in reference to the accompanying drawings describes the present invention in detail, and the present invention can use in other mode.

For example, although in illustrated embodiment, the hydraulic pressure value that activating pressure learning control device 100 will obtain by the activating pressure of revising (adjustment) coupling device is stored as new learning value, but the correction of activating pressure (adjustment amount) can be treated to learning value G.For example, the correction (adjustment amount) that obtains from default value can be stored as learning value G, based on this, and can be with default value and learning value G mutually in addition as the coupling device activating pressure of next speed change in the cycle.

In addition, in the above-described embodiment, although shown in the hydraulic pressure learning value arteries and veins spectrogram as shown in figure 11, motor torque is divided into seven ranks (comprising motor torque 1 to 7), and motor torque also can be divided into more or less rank.

In addition, in diagram of circuit shown in Figure 19, the Control work of carrying out at the learning value of the coupling device activating pressure in the selected speed change that is used in automatic speed changing part 20 relates to differential part 11 and is placed in stepless change state (pattern " A ") or non-stepless change state (pattern " B ").The invention is not restricted to this state.For example, Control work can based on: differential part 11 is placed in the stepless change state, and wherein, the variation of overall ratio γ T relates to continuous variation (pattern " A ") or jump speed change (pattern " B "); Perhaps whether differential part 11 is placed in non-stepless change state.Whether whether they can be further be placed in stepless change state and overall ratio γ T based on: differential part 11 has the continually varying of belonging to and changes; Perhaps whether differential part 11 is placed in the stepless change state and overall ratio γ T has the variation that belongs to the jump speed change.

For example, be placed in differential part 11 under the situation of stepless change state, if the variation of overall ratio γ T belongs to continuous variation or jump speed change (discontinuous variation), then, revise the default value on the hydraulic pressure value arteries and veins spectrogram of not learning that is used for pattern " A " based on to the learning value on the hydraulic pressure study arteries and veins spectrogram of having learnt that is used for pattern " B ".

In the speed-change process of automatic speed changing part 20, correction is selected as being used for the hydraulic pressure value of coupling device activating pressure.Default value on the hydraulic pressure value arteries and veins spectrogram of not learning that is used for pattern " B " is corrected based on the hydraulic pressure learning value arteries and veins spectrogram of having learnt that is used for pattern " A " as yet, and is selected as being used to make automatic speed changing part 20 to carry out the hydraulic pressure value of the coupling device of speed change.

If finish pattern " A " and " B " in study, then the learning value in the hydraulic pressure value arteries and veins spectrogram is selected as being used to make automatic speed changing part 20 to carry out the hydraulic pressure value of the coupling device of speed change.All do not learnt if be used for the learning value of the hydraulic pressure value arteries and veins spectrogram of pattern " A " and " B ", the default value on the then relevant hydraulic pressure value arteries and veins spectrogram is selected as being used to make automatic speed changing part 20 to carry out the hydraulic pressure value of the coupling device of speed change.

Although in illustrated embodiment, 84 pairs of activating pressure control setups are used in the control of the activating pressure of the coupling device in automatic speed changing part 20 speed changes and learn, and can learn in real time in the speed-change process of automatic speed changing part 20.For example, changed constantly, made the rotational speed N of in the speed-change process of automatic speed changing part 20 transferring elements 18 with the activating pressure of the related coupling device of relevant speed change ₁₈With engine speed N _ERealize given variable condition.

In addition, be placed under the situation of non-stepless change state engine speed N in differential part 11 _EChange in the speed-change process of automatic speed changing part 20, so that the inertia that takes place in the speed-change process increases, this is opposite with the situation that differential part 11 is placed under the stepless change state.Therefore, the engagement hydraulic of engage side coupling device can increase, and this increase relates to inertia and absorbs component.At this moment, if use the first electrical motor M1 and/or the second electrical motor M2 to come the forcibly changing rotational speed N ₁₈With engine speed N _ESo that the rotational speed N of transferring elements 18 ₁₈With engine speed N _ERealize given variable condition or make rotational speed N ₁₈With engine speed N _EApproaching level separately after speed change, then the engage side coupling device can be than the rotational speed N of transferring elements 18 ₁₈With engine speed N _EHas lower engagement hydraulic under the situation that does not all have to change.

In addition, in the above-described embodiment, the hydraulic pressure value arteries and veins spectrogram that is used for pattern " A ", " B " and " C " is stored the default value that is used for it respectively, and with default value write again the learning value that obtains by learning manipulation be used for the storage.But, state according to speed-changing mechanism in automatic speed changing part 20 speed-change processes, default value is stored for a kind of hydraulic pressure learning value arteries and veins spectrogram (a kind of pattern) in essence, and being write the new learning value that obtains by study again, this learning value can be organized and store and be used for pattern " A ", " B " and " C ".

In addition, in the above-described embodiment, shown in the time diagram of Figure 13 and 14, differential part 11 carry out variable speed control with before and after automatic speed changing part 20 speed changes with engine speed N _ERemain on the level of basic fixed, just do not change overall ratio γ T.But, also needn't need engine speed N _ERemain on the level of basic fixed, can be at engine speed N _EThe repressed state of variation under continuously change engine speed N _EEven in such replacement scheme, can obtain certain effect.

In addition, in illustrated embodiment, according to vehicle condition and reference example speed change figure as shown in Figure 6, whether remain on stepless control area based on speed-changing mechanism 10, differential state determining apparatus 80 (the step S2 among Figure 12) judges whether power splitting mechanism 16 is placed in the differential state.But whether whether power splitting mechanism 16 is placed in the judgement of differential state can be based on placing the judgement of grade control area or stepless control area to carry out speed-changing mechanism 10 to switching control 50.

In addition, in illustrated embodiment, surpass under the situation of given value in the rangeability of considering target overall ratio γ T, speed ratio changes decision maker 86 (the step S3 among Figure 12) judgement and has the jump speed change.But rate of change that can based target overall ratio γ T surpasses given rate of change and judges the jump speed change.Here employed term " given rate of change " is meant the determined value that obtains by experiment in advance, and this value is used to judge that target overall ratio γ T changes but (just discontinuous mode) variation step by step continuously.

For example, in illustrated embodiment, speed-changing mechanism 10,70 is configured to, and is switched to stepless change state and step change state by differential state and the non-differential state (lock-out state) that differential part 11 (power splitting mechanism 16) is switched to as electric steplessly variable transmission.Switching between stepless change state and the step change state is carried out to differential part 11 being placed a kind of pattern of differential state and non-differential state.But even for example when being placed in the differential state, differential part 11 can not be with continuous mode but so that the step change transmission of grade patterns of change to be arranged as speed ratio yet.

In other words, the stepless change state/step change state of the differential state of differential part 11/non-differential state and speed-changing mechanism 10,70 needn't become one-to-one relationship.For the present invention, differential part 11 needn't form the structure that can switch between stepless change state and step change state, but the structure of speed-changing mechanism 10,70 (power splitting mechanism 16) should be enough to switch between differential state and non-differential state.

In the power splitting mechanism 16 of illustrated embodiment, the first pinion carrier CA1 is fixed to driving engine 8, the first sun gear S1 and is fixed to the first electrical motor M1, and the first gear ring R1 is fixed to transferring elements 18.But such connection arranges not necessarily, and driving engine 8, the first electrical motor M1 and transferring elements 18 are fixed among three element CA1, S1 of first planetary gear unit 24 and the R1 on corresponding one.Although in illustrated embodiment, driving engine 8 is connected directly to actuating device input shaft 14, and it can may be operably coupled to input shaft 14 by gear, band etc., and does not need and input shaft 14 coaxial configurations.

In illustrated embodiment, the first electrical motor M1 and the second electrical motor M2 and the 14 coaxial configurations of actuating device input shaft, the first electrical motor M1 is fixed to the first sun gear S1, and the second electrical motor M2 is fixed to transferring elements 18.But such layout not necessarily.For example, the first electrical motor M1 can be fixed to the first sun gear S1 by gear, band etc., and the second electrical motor M2 can be fixed to transferring elements 18.

Although above power splitting mechanism 16 is provided with switch clutch C0 and switches drg B0, both must be set, but among switch clutch C0 and the switching drg B0 one also can only be set.Although switch clutch C0 optionally is connected to each other sun gear S1 and pinion carrier CA1, it can optionally be connected to each other sun gear S1 and gear ring R1, perhaps optionally pinion carrier CA1 and gear ring R1 is connected to each other.In essence, switch clutch C0 is enough to connect in three elements of first planetary gear unit 24 any two.Switch clutch C0 in the illustrated embodiment is engaged setting up Neutral Position in speed-changing mechanism 10,70, sets up Neutral Position but can not need to engage by it.

Fluid pressure type friction engagement device such as switch clutch C0 and switching drg B0 can be magnetic formula, electromagnetic type or mechanical engagement means, for example powder (magnetic) power-transfer clutch, magnetic clutch and engagement type denture clutch.The second electrical motor M2 that is connected in the above-described embodiments on the transferring elements 18 can be connected to output block 22, perhaps can be connected to the turning unit that is configured in the automatic

speed changing part

20,72.

In addition, in illustrated embodiment, automatic

speed changing part

20,72 is configured in the power transfer path between transferring elements 18 and the drive wheel 38, and transferring elements 18 is as the output block of differential part 11 (just power splitting mechanism 16).But the torque transfer of other type (all formulas of constant-mesh as is well known) comprises two parallel axles, and by selecting ring and speed change cylinder the automatic switchover gear.Term used herein " step change state " refers to wherein mainly to realize transmission of power and do not use the state of electrical path in the mechanical transfer path.

Under the situation of toric transmission (CVT), make whole change-speed box place the step change state by power splitting mechanism 16 being placed the fixed speed ratio state.Here, the step change state refers to mainly not use electrical path to come the state of transferring power by the mechanical power bang path.Replacedly, corresponding to the speed ratio of step change transmission, a plurality of fixed speed ratios can be stored in the toric transmission in advance, make automatic

speed changing part

20,72 can use a plurality of fixed speed ratios to carry out speed change.

In addition, in illustrated embodiment, although automatic

speed changing part

20,72 is connected to differential part 11 via transferring elements 18, the countershaft parallel with input shaft 14 can be set, to allow on the coaxial axis that is configured in countershaft of automatic speed changing part 20,72.In this case, differential part 11 and automatic

speed changing part

20,72 are connected to each other with the transmission of power ability via one group of transferring elements, and this transferring elements is for example by as the counter shaft gear of transferring elements, sprocket wheel and chain being constituted.

In illustrated embodiment, power splitting mechanism 16 for example is made of miniature gears that drives by driving engine and rotate and differential gear set with bevel-gear sett, described bevel-gear sett and pinion, and may be operably coupled to the first electrical motor M1 and the second electrical motor M2.

The power splitting mechanism 16 that is made of a pair of planetary gear unit in illustrated embodiment can comprise two pairs or more to planetary gear unit, thereby is used as the change-speed box with three or more gear stage down at non-differential state (fixed speed ratio state).Planetary gear unit is not limited to single pinion type, and it also can be a double-pinion type.

Shifter 90 in the illustrated embodiment has and is operated the shifter bar 92 that is used to select one of a plurality of shift position.But, replace such shifter bar 92, can adopt following switch or device.In other words, can adopt the switch or the device of following form: comprise the switch of squash type switch or slipping switch, it is chosen in a plurality of shift position one; The operation that is not in response to the operation of hand and is in response to chaufeur sound is chosen to the device of one of a plurality of shift position; And the device that is chosen to one of a plurality of shift position in response to the operation of pin.

In illustrated embodiment, set up speed range by shifter bar 92 being manipulated to " M " position, but can set up shift position by the gear stage that is provided as the maximum speed section, just velocity location for each speed range.In this case, in automatic

speed changing part

20,72, shift position is switched to be used to carry out gear shifting operation.For example, when carrying out shifter bar 92 in " M " position, set first gear any one to the fourth speed position by in automatic speed changing part 20, operating shifter bar 92 to the M/C of upgrade position "+" and downshift position "-".

Switch 44 in the illustrated embodiment is interactive.But, can adopt the switch that can optionally be switched to one of stepless change state (differential state) and step change state (non-differential state).In other words, can be provided with: the squash type switch; Two squash type switches that can keep the state that pushed by selectivity; Lever switch; And slipping switch.Except using switch 44, also can be independent of the switch that switch 44 setting has two effective and invalid shift position of the state that is used to make its selection with single center position.Place of switches 44 or in addition can adopt with lower device: be not in response to M/C and the operation that is in response to chaufeur sound is optionally switched to the device that stepless change travels (differential state) and step change travels one of (non-differential state); And come device for switching by the operation of pin.

In addition, in illustrated embodiment, in order to allow the rotational speed N of transferring elements 18 ₁₈Realize given variable condition, for example, hybrid power control setup 52 uses the first electrical motor M1 and/or the second electrical motor M2 (on the real-time basis of what is called) to change the rotational speed N of transferring elements 18 continuously ₁₈But hybrid power control setup 52 can be configured to learn the control variable of the first electrical motor M1 and/or the second electrical motor M2, to allow using relevant control variable in speed change subsequently.

For example, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, hybrid power control setup 52 monitors the actual speed N of transferring elements 18 in the speed-change process ₁₈Variation, be used for comparing with given variable condition.Hybrid power control setup 52 is carried out learning control, is used to revise the control variable of the first electrical motor M1 and/or the second electrical motor M2, with the difference between the actual change that suppresses rotating speed in subsequently speed change in the cycle and the given variable condition.In other words, hybrid power control setup 52 is adjusted, and to increase or to reduce to be used in the first electrical motor M1 that is right after in speed-change process before and/or the control variable of the second electrical motor M2, makes and set up given variable condition in speed change subsequently.

In addition, speed change kind (for example first gear upgrading) corresponding to motor torque in the speed-change process and target study to second gear, hybrid power control setup 52 is written as control variable by current learning control again control variable is revised back ('s finishing when adjusting) value, at the control variable of the first electrical motor M1 and/or the second electrical motor M2 aforesaid control variable newly is stored as learning value in the learning value arteries and veins spectrogram.In addition, learning value arteries and veins spectrogram is prepared to be used for the stepless change state and the non-stepless change state of differential part 11 respectively.In addition, whether be in the stepless change state, overall ratio γ T continuously changes or, prepare learning value arteries and veins spectrogram according to differential part 11 with different patterns with the change of jump gear shift mode.

In addition, in illustrated embodiment, in the speed-change process of automatic speed changing part 20, activating pressure control setup 184 is controlled the coupling device activating pressure in the speed-change process that is used in automatic speed changing part 20 in real time.But such control can be carried out when carrying out the study carried out by hybrid power control setup 52 etc.For example, make automatic speed changing part 20 carry out the on period of speed change at step change control setup 54, activating pressure control setup 184 monitors the actual speed N of transferring elements 18 in the speed-change process ₁₈Variation, be used for comparing with given variable condition.Activating pressure control setup 184 is carried out the learning control that is used to revise the coupling device activating pressure, to suppress the actual change of rotating speed and the difference between the given variable condition in the cycle in subsequently speed change.

In addition, in graphic the 4th embodiment, shown in the time diagram in Figure 13 and 14, differential part 11 is carried out variable speed control to allow engine speed N before and after automatic speed changing part 20 speed changes _ERemain on substantially invariable level, just do not change the overall ratio γ T of speed-changing mechanism 10.But, must not need engine speed N _ERemain on substantially invariable level, and operation can fully suppress engine speed N _EVariation continuously change overall ratio γ T simultaneously.Even according to this operation, can obtain preliminary effect.

In the graphic the 4th and the 5th embodiment, according to vehicle condition and reference example speed change figure as shown in Figure 6, whether remain on stepless control area based on power splitting mechanism 16, differential state determining apparatus 182 (the step SC2 among Figure 25 and the step SD2 among Figure 27) judges whether power splitting mechanism 16 is placed in the differential state.But switching control 50 can grade control area is arranged still be that the judgement of stepless control area judges whether power splitting mechanism 16 is placed in the differential state based on speed-changing mechanism 10 is in.

In graphic the 5th embodiment, speed ratio changes decision maker 188 (the step SD3 among Figure 27) and is judged to be the jump speed change in the rangeability of target overall ratio γ T above under the situation of given value.But, can under the situation of rate of change of target overall ratio γ T, be judged to be the jump speed change above given rate of change.Terminology used here " given rate of change " refers to that the determined value that obtains by experiment in advance, this value are used to judge that the variation of target overall ratio γ T is not continuous but (promptly discrete) of level arranged.

In illustrated embodiment, be used as under the confined situation of work of electric steplessly variable transmission (differential gear) in differential part 11, switching control 50 full engagement switch clutch C0 or switch drg B0, differential part 11 is switched to non-differential state (lock-out state) thus avoid differential action.But the torque capacity of switch clutch C0 or switching drg B0 for example can change to half engagement state, limits the work of differential part 11 as automatically controlled differential gear thus.

Especially, switching control 50 can make switch clutch C0 or switch drg B0 and place half engagement state.This allows differential part 11 as electric controlling stepless variable speed part (differential gear).In addition, use the torque that produces by the first electrical motor M1 and at switch clutch C0 or switch the torque that half engagement state of drg B0 produces, can produce and be used to overcome the motor torque T that is input to differential part 11 _EReactive torque.

For such layout, differential part 11 can be supplied with the motor torque T above given value TE1 _E, this given value TE1 determines with the torque capacity of the first electrical motor M1.As a result, the output of differential part 11 is increased, and need not to make the maximum torque capacity of the first electrical motor M1 that any increase is arranged, just need not to make the size of the first electrical motor M1 that any increase is arranged.

Replacedly, with switch clutch C0 wherein or switch the d/d situation of drg B0 and compare, the first electrical motor M1 does not need to bear the reactive torque that is used to overcome the whole motor torque TE that is imported into differential part 11.This makes it possible to reduce the motor torque T that produced by the first electrical motor M1 _EThe ratio of the motor torque TE identical with the motor torque that is applied to differential part 11 with respect to amplitude.Can make thus and win electrical motor M1 miniaturization or increase the durability of the first electrical motor M1.Replacedly, the electric energy that this makes it possible to reduce to be delivered to from the first electrical motor M1 the second electrical motor M2 causes the durability of the second electrical motor M2 to increase.

Replacedly, whether switching control 50 can not wait to place the stepless control area of stepless change state or hot differential part 11 whether to remain on the constraint that grade control area is arranged of waiting to place non-stepless change state and not remained on by differential part 11 so that switch clutch C0 or switching drg B0 operate in half engagement state.

In addition, in above-mentioned illustrated embodiment, speed-changing mechanism 10,70 is constructed such that in power splitting mechanism 16 and switches under the situation of differential state or non-differential state, speed-changing mechanism can switch to the stepless change state to realize the function of electric steplessly variable transmission, perhaps switches under the non-stepless change state to realize the function of step change transmission.But, even speed-changing mechanism 10,70 comprises the speed-changing mechanism that can not be switched to the step change state, even just stepless change part 11 comprises differential part (the stepless change part) 11 that only has as electric steplessly variable transmission (automatically controlled differential gear) function, also can use the present invention.In this case, do not need to be provided with switching control 50 and speedup shelves decision maker 62.

In addition, only should be appreciated that and describe embodiments of the invention, and the present invention can and revise and implement with the various changes that it may occur to persons skilled in the art that for illustrational purpose.

Claims

1. control convenience that is used for vehicle driving apparatus,

Described vehicle driving apparatus has (i) driving engine; (ii) stepless change part, described stepless change partly comprises the box of tricks and second electrical motor and can be used as electric steplessly variable transmission work, described box of tricks is used for the output of described driving engine is dispensed to first electrical motor and transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (iii) variable part, described variable part form the part of described power transfer path and carry out speed change by coupling device being engaged or discharging,

Described control convenience comprises:

The differential state switching device, described differential state switching device is configured in the described box of tricks and can works so that described stepless change part is optionally switched to stepless change state and non-stepless change state, described stepless change state makes it possible to carry out electric controlling stepless variable speed work, and described non-stepless change state makes can not carry out described electric controlling stepless variable speed work; With

The activating pressure control setup, described activating pressure control setup is used to control the activating pressure of described coupling device, realizes given variation with the rotating speed that allows described transferring elements under the situation that partly is placed in described stepless change state at described stepless change during the speed change of described variable part.

2. control convenience that is used for vehicle driving apparatus,

Described control convenience comprises:

The activating pressure control setup, described activating pressure control setup is used to control the activating pressure of described coupling device, realizes given variation with the rotating speed that allows described transferring elements under the situation that partly is placed in described non-stepless change state at described stepless change during the speed change of described variable part or the rotating speed of described driving engine.

3. control convenience that is used for vehicle driving apparatus,

Described vehicle driving apparatus has (i) driving engine; (ii) differential part, described differential partly comprises the box of tricks and second electrical motor, described box of tricks is used for the output of described driving engine is dispensed to first electrical motor and transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (iii) variable part, described variable part form the part of described power transfer path and carry out speed change by coupling device being engaged or discharging,

Described control convenience comprises:

The differential state switching device, described differential state switching device is configured in the described box of tricks and can works so that described differential part is optionally switched to differential state and non-differential state, described differential state makes it possible to carry out differential action, and described non-differential state makes can not carry out described differential action; With

The activating pressure control setup, described activating pressure control setup is used to control the activating pressure of described coupling device, partly to be placed at described differential under the situation of described differential state, during the speed change of described variable part, allow the rotating speed of described transferring elements to realize given variation.

4. control convenience that is used for vehicle driving apparatus,

Described control convenience comprises:

The activating pressure control setup, described activating pressure control setup is used to control the activating pressure of described coupling device, realizes given variation with the rotating speed that allows described transferring elements under the situation that partly is placed in described non-differential state at described differential during the speed change of described variable part or the rotating speed of described driving engine.

5. according to claim 1 or the 3 described control conveniences that are used for vehicle driving apparatus, also comprise control device of electric motor, described control device of electric motor is used to make the rotation speed change of described first electrical motor, changes continuously before and after the speed change of described variable part with the rotating speed that allows described driving engine.

6. according to each described control convenience that is used for vehicle driving apparatus in the claim 1 to 5, wherein, described activating pressure control setup is learnt the activating pressure of described coupling device, realizes described given variation with the rotating speed that allows described transferring elements or the rotating speed of described driving engine.

7. the control convenience that is used for vehicle driving apparatus according to claim 6, also comprise rotating control assembly, described rotating control assembly is used to use described first electrical motor and/or described second electrical motor to make the rotation speed change of described transferring elements, realize given variation with the rotating speed that during the speed change of described variable part, allows described transferring elements, and

Be operated at described rotating control assembly under the situation of rotation speed change of described transferring elements, described activating pressure control setup is forbidden the activating pressure of described coupling device is learnt.

8. the control convenience that is used for vehicle driving apparatus according to claim 6, also comprise rotating control assembly, described rotating control assembly is used to use described first electrical motor and/or described second electrical motor to make the rotation speed change of described transferring elements, realize given variation with the rotating speed that during the speed change of described variable part, allows described transferring elements, and

Be operated at described rotating control assembly under the situation of rotation speed change of described transferring elements, described activating pressure control setup considers that the change in rotational speed of described transferring elements learns the activating pressure of described coupling device.

9. control convenience that is used for vehicle driving apparatus,

Described vehicle driving apparatus has (i) stepless change part, described stepless change partly comprises the box of tricks and second electrical motor and can be used as electric steplessly variable transmission work, described box of tricks is used for the output of driving engine is dispensed to first electrical motor and transferring elements, in the power transfer path of described second motor configurations between transferring elements and drive wheel; (ii) variable part, described variable part forms the part of described power transfer path,

Described control convenience comprises:

Control device of electric motor, during the speed change of described variable part, described control device of electric motor uses described first electrical motor and/or described second electrical motor to make the rotation speed change of described transferring elements.

10. the control convenience that is used for vehicle driving apparatus according to claim 9, wherein, speed change is carried out by making to discharge the release of side engagement device or the engage side coupling device is engaged in described variable part, and

Described control convenience also comprises the activating pressure control setup, during the speed change of described variable part, combine with the change in rotational speed of the described transferring elements that causes by described control device of electric motor, described activating pressure control setup is controlled the activating pressure of described release side engagement device and/or the activating pressure of described engage side coupling device, makes the rotation speed change of described transferring elements thus.

11. according to claim 9 or the 10 described control conveniences that are used for vehicle driving apparatus, wherein, described control device of electric motor allows the rotation speed change of described transferring elements to realize given rate of change.

12. according to each described control convenience that is used for vehicle driving apparatus in the claim 9 to 11, wherein, the described control device of electric motor rotating speed that is used to use described first electrical motor to prevent described transferring elements changes before and after the speed change of described variable part.

13. a control convenience that is used for vehicle driving apparatus,

Described vehicle driving apparatus has (i) stepless change part, described stepless change partly comprises the box of tricks and second electrical motor and can be used as electric steplessly variable transmission work, described box of tricks is used for the output of driving engine is dispensed to first electrical motor and transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (ii) variable part, described variable part forms the part of described power transfer path,

Described control convenience comprises:

Differential action restraint device, described differential action restraint device are configured in the described box of tricks and can work to limit the differential action of described box of tricks, limit the work of described stepless change part as electric steplessly variable transmission thus; With

Control device of electric motor, when described differential action restraint device limit described stepless change part as the work of electric steplessly variable transmission when described stepless change partly being placed the non-stepless change state that interrupts electric controlling stepless variable speed work, described control device of electric motor uses described first electrical motor and/or described second electrical motor to make the rotation speed change of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

14. the control convenience that is used for vehicle driving apparatus according to claim 13, wherein, speed change is carried out by making to discharge the release of side engagement device or the engage side coupling device is engaged in described variable part, and

Described control convenience also comprises the activating pressure control setup, during the speed change of described variable part, combine with the rotating speed of the described transferring elements that causes by described control device of electric motor or the change in rotational speed of described driving engine, described activating pressure control setup is controlled the activating pressure of described release side engagement device and/or the activating pressure of described engage side coupling device, makes the rotation speed change of the rotating speed or the described driving engine of described transferring elements thus.

15. according to claim 13 or the 14 described control conveniences that are used for vehicle driving apparatus, wherein, described control device of electric motor allows the rotation speed change of the rotating speed of described transferring elements or described driving engine to realize given rate of change.

16. a control convenience that is used for vehicle driving apparatus,

Described vehicle driving apparatus has (i) stepless change part, described stepless change partly comprises the box of tricks and second electrical motor and can work to be used as electric steplessly variable transmission, described box of tricks can be dispensed to the output of driving engine first electrical motor and the transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (ii) variable part, described variable part forms the part of described power transfer path,

Described control convenience comprises:

Differential action restraint device, described differential action restraint device are configured in the described box of tricks and can work to limit the differential action of described box of tricks, limit the work of described stepless change part as described electric steplessly variable transmission thus; With

Control device of electric motor, according to described differential action restraint device whether limit described stepless change part as the work of described electric steplessly variable transmission described stepless change is partly placed the non-stepless change state that can not carry out electric controlling stepless variable speed work that makes, described control device of electric motor uses described first electrical motor and/or described second electrical motor to change the change in rotational speed method of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

17. a control convenience that is used for vehicle driving apparatus,

Described control convenience comprises:

Control device of electric motor, according to being to carry out to make the overall ratio continually varying speed change that is realized by the described variable part of described stepless change partial sum or carry out the speed change that makes the discontinuous variation of described overall ratio, described control device of electric motor uses described first electrical motor and/or described second electrical motor to change the change in rotational speed method of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

18. a control convenience that is used for vehicle driving apparatus,

Described vehicle driving apparatus has (i) differential part, described differential partly comprises the box of tricks and second electrical motor, described box of tricks can be dispensed to the output of driving engine first electrical motor and the transferring elements, in the power transfer path of described second motor configurations between described transferring elements and drive wheel; (ii) variable part, described variable part forms the part of described power transfer path,

Described control convenience comprises:

19. a control convenience that is used for vehicle driving apparatus,

Described control convenience comprises:

The differential action restraint device, described differential action restraint device is configured in the described box of tricks, is used for limiting by the differential action that limits described box of tricks the differential action of described differential part; With

Control device of electric motor, the differential action that limits described differential part when described differential action restraint device is so that described differential when partly placing the non-differential state of not carrying out differential action, and described control device of electric motor uses described first electrical motor and/or described second electrical motor to make the rotation speed change of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

20. a control convenience that is used for vehicle driving apparatus,

Described control convenience comprises:

Control device of electric motor, whether limit described differential differential action partly so that described differential partly places the non-differential state of not carrying out differential action based on described differential action restraint device, described control device of electric motor uses described first electrical motor and/or described second electrical motor to change the change in rotational speed method of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.

21. a control convenience that is used for vehicle driving apparatus,

Described control convenience comprises:

Control device of electric motor, speed change based on described variable part makes the continuous variation of the overall ratio of being realized by the described variable part of described stepless change partial sum or makes the discontinuous variation of described overall ratio, and described control device of electric motor uses described first electrical motor and/or described second electrical motor to change the change in rotational speed method of the rotating speed or the described driving engine of described transferring elements during the speed change of described variable part.