CN108327701A - A kind of startup control method and system - Google Patents
A kind of startup control method and system Download PDFInfo
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- CN108327701A CN108327701A CN201810154459.5A CN201810154459A CN108327701A CN 108327701 A CN108327701 A CN 108327701A CN 201810154459 A CN201810154459 A CN 201810154459A CN 108327701 A CN108327701 A CN 108327701A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
Abstract
A kind of startup control method of offer of the embodiment of the present invention and system, are related to technical field of engine control, which includes：When current residual electricity is less than low battery threshold value, control starter motor dragging engine accelerates to the first rotating speed；When the current rotating speed of engine reaches the first rotating speed, engine ignition signal is sent to engine, so that engine enters the autonomous operation stage；It is expected that rotating speed control engine accelerates to the second rotating speed based on preset engine；When engine reaches the second rotating speed, controlled with the coupling for completing engine power and P2 motor powers in conjunction with separation clutch.When starting the engine being closed using scheme provided by the invention, engine is first accelerated to the first rotating speed by starter motor, then it is expected rotating speed approach from engine autonomous operation and to engine, so that even if when vehicle remaining capacity deficiency, remain able to provide torque jointly by engine and motor to meet the torque demand of vehicle acceleration.
Description
Technical field
The present invention relates to technical field of engine control, more particularly to a kind of startup control method and system.
Background technology
Currently, it is smaller to the change of conventional drivetrain based on the hybrid dynamic system of Technology of Hybrid Electric Vehicle, and there is fuel-economizing
Advantage with obvious effects is thus more popular.As shown in Figure 1, being introduced by taking the P2 hybrid dynamic systems in hybrid dynamic system as an example, P2
Module is the core technology of P2 hybrid dynamic systems, which includes motor and separation clutch.It is maximized for fuel-economizing ability
Consider, when vehicle speed is more than setting value, control engine enters closed state.Therefore, in actual vehicle driving process,
When engine is closed and driver needs to change driving intention (such as wishing that vehicle enters acceleration mode), usually need
After wanting motor drag engine to reach certain rotating speed, engine controller controls engine ignition, to by motor and engine
It is common that torque (i.e. coupling control) is provided, to meet the torque demand of vehicle acceleration.But for mixed electrical automobile, work as vehicle
Remaining capacity be not enough to support motor drag engine when, only lean on P2 modules in motor driving cannot be satisfied to vehicle accelerate
Torque demand.
Invention content
The embodiment of the present invention is designed to provide a kind of startup control method and system, is closed with starting
Even engine remains able to be provided jointly by engine and motor so that insufficient in vehicle remaining capacity
Torque is to meet the torque demand of vehicle acceleration.
In order to achieve the above objectives, the embodiment of the invention discloses a kind of startup control method, the startup control method packets
It includes：
When current residual electricity is less than low battery threshold value, controls the starter motor dragging engine and accelerate to first turn
Speed, wherein first rotating speed is the rotating speed that the engine enters utonomous working state；
When the current rotating speed of the engine reaches the first rotating speed, engine ignition signal is sent to the engine,
So that the engine enters the autonomous operation stage；
It is expected that rotating speed controls the engine and accelerates to the second rotating speed based on preset engine, wherein described second turn
Speed is that the engine approaches in the engine expectation Rotation Process, when reaching stable state based on speed closed loop control mode
Currently practical rotating speed；
When the engine reaches second rotating speed, in conjunction with separation clutch to complete engine power and P2 motors
The coupling of power controls.
Preferably, the preset engine it is expected that the acquisition methods of rotating speed include：
It is expected rotating speed according to the speed of target vehicle and gear speed ratio acquisition of information motor；
Motor expectation rotating speed is set as engine and it is expected rotating speed.
Preferably, it calculates the motor according to following formula and it is expected rotating speed ndes：
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesTo be currently located the speed ratio or downshift of gear
The speed ratio of gear where after processing.
Preferably, the engine accelerates to after the second rotating speed, and the startup control method further includes：
Judge that the engine it is expected whether rotating speed is more than the threshold engine speed, if it is, into the first control
Flow processed, if it is not, then into the second control flow；Wherein,
First control flow is：
Engine current torque is calculated according to second rotating speed and the engine load；
Receive the expectation synchronous rotational speed and reach the time cycle needed for the expectation rotating speed that the entire car controller is sent；
The torque increase for promoting rotating speed is calculated according to the expectation synchronous rotational speed and the time cycle；
Speed control is carried out to the engine according to the current torque and the torque increase；
Second control flow is：
Speed control is carried out to the engine using the engine idling of the engine.
Preferably, the startup control method further includes：
Air inflow, the oil spout factor under different engine water temperatures are demarcated in advance, according to engine water temperature, air inlet
Amount, the oil spout factor control engine speed.
Preferably, the startup control method further includes：
The engine with it is described detach clutch combine after, based on the rotating speed between the engine and the motor
Difference carries out closed-loop control to the oil pressure of the separation clutch.
In order to achieve the above objectives, the embodiment of the invention discloses a kind of startup control system, the startup control system packets
It includes：Engine controller, entire car controller, starter motor, engine, motor and separation clutch；Wherein,
The entire car controller, the enabling signal sent for receiving the engine controller are receiving described open
The starter motor is controlled after dynamic signal, and the first rotating speed is accelerated to the engine；
The engine controller, for when current residual electricity is less than low battery threshold value, controlling the starter motor and dragging
Dynamic engine accelerates to the first rotating speed；When the current rotating speed of the engine reaches the first rotating speed, sent to the engine
Engine ignition signal, so that the engine enters the autonomous operation stage；It is expected that rotating speed controls institute based on preset engine
It states engine and accelerates to the second rotating speed；
When the engine reaches second rotating speed, in conjunction with separation clutch to complete engine power and P2 motors
The coupling of power controls, wherein first rotating speed is the rotating speed that the engine enters utonomous working state, described second turn
Speed is that the engine approaches in the engine expectation Rotation Process, when reaching stable state based on speed closed loop control mode
Currently practical rotating speed.
Preferably, the entire car controller, for institute to be calculated according to the speed and gear speed ratio information of target vehicle
It states motor and it is expected rotating speed, and the motor being calculated expectation rotating speed is sent to the engine controller；
The engine controller it is expected rotating speed for receiving the motor that the entire car controller is sent, and by institute
It states motor and it is expected that rotating speed is set as engine and it is expected rotating speed.
Preferably, the entire car controller calculates the motor expectation rotating speed n according to following formulades：
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesTo be currently located the speed ratio or downshift of gear
The speed ratio of gear where after processing.
Preferably, the engine controller is additionally operable to after the engine accelerates to the second rotating speed, described in judgement
Engine it is expected whether rotating speed is more than the threshold engine speed, if it is, into the first control flow, if it is not, then
Into the second control flow；Wherein,
First control flow is：
Engine current torque is calculated according to second rotating speed and the engine load；
Receive the expectation synchronous rotational speed and reach the time cycle needed for the expectation rotating speed that the entire car controller is sent；
The torque increase for promoting rotating speed is calculated according to the expectation synchronous rotational speed and the time cycle, according to described
Current torque and the torque increase carry out speed control to the engine；
Second control flow is：
Speed control is carried out to the engine using the engine idling of the engine.
A kind of startup control method of offer of the embodiment of the present invention and system, when starting the engine being closed,
Engine is first accelerated to the first rotating speed by starter motor, then it is expected rotating speed approach from engine autonomous operation and to engine, from
Even and if when making vehicle remaining capacity deficiency, remain able to provide torque jointly by engine and motor to meet vehicle acceleration
Torque demand.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of hybrid dynamic system；
Fig. 2 is a kind of flow diagram starting control method provided in an embodiment of the present invention；
Fig. 3 is another flow diagram for starting control method provided in an embodiment of the present invention；
Fig. 4 (a) and (b) are respectively the hair under the startup control provided based on the first control flow and the second control flow
Motivation actual speed curve graph；
Fig. 5 is the ideal engine speed variation tendency of a kind of startup stage that the prior art provides；
Fig. 6 is the ideal air-fuel ratio variation tendency of a kind of startup stage that the prior art provides；
Fig. 7 is a kind of structural schematic diagram starting control system provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Lower simple introduction is carried out to hybrid dynamic system first.Currently, P2 hybrid dynamic systems are a kind of more popular hybrid dynamic systems,
It is smaller to the change of conventional drivetrain.From hybrid dynamic system as shown in Figure 1 as can be seen that only engine and speed changer it
Between a P2 module is added, the wherein P2 modules include that a motor and a separation clutch, engine and gearbox are not necessarily to
It carries out big change and mixed dynamic effect can be realized, be mainly used for plug-in mixed dynamic and strong mixed.It should also be noted that, " P " in P2
Position of the motor in hybrid dynamic system is represented, specifically, after " 2 " this position is engine, before speed changer.Correspondingly,
According to the difference of motor position, it can also include P0, P1, P3 and P4 hybrid dynamic system, no longer introduce one by one herein.It needs
Bright, in order to make it easy to understand, the present invention is only illustrated by taking P2 hybrid dynamic systems as an example, this should not constituted to skill of the present invention
The restriction of art scheme, that is to say, that P2 of the technical solution provided in an embodiment of the present invention not merely suitable for hybrid dynamic system
Hybrid dynamic system can be applicable to other hybrid dynamic systems.
Then lower introduction is carried out to the application scenarios of the embodiment of the present invention, for hybrid dynamic system, for fuel-economizing maximum
The design of change needs, and in the design phase of hybrid dynamic system, engine controller can be set when vehicle speed is more than setting value
Control engine enters closed state.In this way, in practical application, when engine is closed, if driver is by chance
Driving intention is changed, as determined in the case of accelerating to vehicle, is usually reached by P2 moulds motor drag engine in the block
Certain rotating speed (" the first rotating speed " that is referred in subsequent step), then again by engine controller controls engine oil spout point
Fire, engine enter the autonomous operation stage, and engine itself, which accelerates to and is stable at engine, it is expected rotating speed (i.e. follow-up step nearby
" the second rotating speed " referred in rapid), torque (i.e. coupling controls) is then provided jointly by motor and engine, however, working as vehicle
Remaining capacity deficiency when motor be not enough to dragging engine, and only lean on P2 modules in motor driving cannot be satisfied to vehicle
The torque demand accelerated.
Therefore, in order to insufficient in vehicle remaining capacity, the engine being closed can be started, and
Torque can be provided jointly by engine and motor to meet the torque demand of vehicle acceleration, an embodiment of the present invention provides one kind
Start control method and system, first describes in detail below to a kind of startup control method provided in an embodiment of the present invention.
As shown in Fig. 2, for a kind of flow diagram starting control method provided in an embodiment of the present invention, the startup control
Method processed includes：
S101：When current residual electricity is less than low battery threshold value, controls starter motor dragging engine and accelerate to the
One rotating speed.
Wherein, first rotating speed is the rotating speed that the engine enters utonomous working state.
Specifically, the embodiment of the present invention is dragged to the first rotating speed by means of starter motor, by engine, for 12V starter motors
For, engine can be generally dragged to hundreds of rpms.It should be noted that it is limited to the mechanical structure of starter motor,
When engine speed is more than 400 rpms or so, the gear of starter motor can be detached from the fluted disc of engine automatically, by starting
Machine autonomous operation.
It should be noted that for different engines, the numerical value of attainable first rotating speed can be different, this hair
Bright embodiment is without being defined the concrete numerical value of the first rotating speed.
It should also be noted that, " low battery threshold value " described herein can be the empirical value obtained according to experimental test,
Those skilled in the art need reasonably to be arranged according to the concrete condition in practical application.In addition, in practical application,
Current remaining capacity can be obtained in real time by the battery management system of vehicle, when entire car controller detects current residual electricity
When amount is less than low battery threshold value, control starter motor dragging engine rotation.
S102：When the current rotating speed of the engine reaches the first rotating speed, engine ignition is sent to the engine
Signal, so that the engine enters the autonomous operation stage.
Specifically, the speed probe for acquiring engine speed can be arranged in advance, and the engine that will be acquired
Rotating speed is reported to engine controller, in this way, when engine controller detects that the current rotating speed of engine reaches the first rotating speed
When, engine ignition signal is sent to engine, engine upon receipt of the signal light a fire by oil spout, and then transmitter enters certainly
The main operation phase, to continue to accelerate to engine.
S103：It is expected that rotating speed controls the engine and accelerates to the second rotating speed based on preset engine.
It is needing to illustrate but, " engine expectation rotating speed " here be it is preset, it is described in a kind of realization method
Preset engine it is expected that the acquisition methods of rotating speed include：According to the speed of target vehicle and gear speed ratio acquisition of information motor phase
Hope rotating speed；Motor expectation rotating speed is set as engine and it is expected rotating speed.It should also be noted that, described herein " second
Rotating speed " is that the engine approach engine it is expected to reach stable shape in Rotation Process, based on speed closed loop control mode
Currently practical rotating speed when state.
Specifically, calculating the motor according to following formula it is expected rotating speed ndes：
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesTo be currently located the speed ratio or downshift of gear
The speed ratio of gear where after processing.
It should be noted that being only a kind of specific implementation for calculating motor and it is expected rotating speed here, the present invention is implemented
Example does not need to it is expected that the concrete mode of rotating speed is defined to calculating motor, and those skilled in the art need according to reality
Concrete condition in is reasonably arranged.
S104：When the engine reaches second rotating speed, in conjunction with separation clutch with complete engine power with
The coupling of P2 motor powers controls.
Specifically, other than it can arrange the speed probe for acquiring engine speed in advance, it can also be in advance
Speed probe for acquiring motor speed is arranged, in this way, entire car controller can obtain working as engine and motor respectively
Preceding rotating speed, and then the current rotating speed that can calculate engine and motor is poor, and then judge current rotating speed difference whether in default
In numberical range, if within the scope of the default value, then trigger engine and engaged with the P2 moulds clutch in the block that detaches,
Coupling so as to complete engine power and P2 motor powers controls.
Further, the startup control method can also include：It is combined with the clutch that detaches in the engine
Afterwards, closed-loop control is carried out to the oil pressure of the separation clutch based on the speed discrepancy between the engine and the motor, with
Toilet is stated speed discrepancy and is in the preset range of speeds.It should be noted that speed discrepancy as feedback quantity and then is formed herein
Closed-loop control, according to loop control theory it is found that controlled volume can be stable in a certain range in the i.e. preset range of speeds,
Engine speed is accurately controlled so as to realize.
When starting the engine being closed using scheme provided by the invention, starter motor first accelerates to engine
Then first rotating speed it is expected rotating speed approach, so that even if vehicle remaining capacity from engine autonomous operation and to engine
When insufficient, remain able to provide torque jointly by engine and motor to meet the torque demand of vehicle acceleration.
Further, it is in the engine approach engine expectation Rotation Process due to " the second rotating speed ", is based on
Speed closed loop control mode reaches currently practical rotating speed when stable state.In practical application, engine controller controls are started
Machine is approached towards default engine speed, may not be with institute but reach the actual speed after stable state i.e. " the second rotating speed "
Preset " engine expectation rotating speed " numerical value is identical.
As shown in figure 3, after engine accelerates to the second rotating speed, the startup control method can also include following step
Suddenly：
S105：Judge that the engine it is expected whether rotating speed is more than the threshold engine speed, if it is, into the
One control flow S106, if it is not, then into the second control flow S107.
Wherein, the first control flow S106 is：
(i) engine current torque is calculated according to second rotating speed and the engine load.
(ii) the expectation synchronous rotational speed and reach the time needed for the expectation rotating speed that the entire car controller is sent are received
Period.
(iii) torque increase for promoting rotating speed is calculated according to the expectation synchronous rotational speed and the time cycle.
(iv) speed control is carried out to the engine according to the current torque and the torque increase.
The second control flow S107 is：Speed is carried out to the engine using the engine idling of the engine
Control.
Referring to Fig. 4 (a) and Fig. 4 (b), the startup control that is respectively provided based on the first control flow and the second control flow
Actual engine speed curve graph under system.As can be seen that the engine idling of engine it is expected that rotating speed is 100 turns small than engine
It is per minute.Certainly, the embodiment of the present invention is needed without being defined to the concrete numerical value of engine idling according to the hard of engine
Depending on part situation.
Further, the startup control method further includes：In advance under different engine water temperatures air inflow, oil spout because
Son is demarcated, and engine speed is controlled according to engine water temperature, air inflow, the oil spout factor, to be guaranteed at different engines
The engine of water temperature can go up punching to the threshold engine speed when accelerating.
Referring to Fig. 5, Fig. 6, wherein figure 5 show startup stage ideal engine speed variation tendencies, and Fig. 6, which is shown, to be opened
Ideal air-fuel ratio variation tendency of dynamic stage.Specifically, according to the air fuel ratio signal that linear oxygen sensors measurement obtains, generally
, chemically correct fuel 14.7 shows that the proportioning of air at this time and gasoline is optimal, can realize completely burned, in addition the air-fuel
Signal is collected by air-fuel ratio measuring instrument and is fed back in engine controller.
It can be seen that relationship between the two from Fig. 5 and Fig. 6：Engine speed is phenomenon, and default air inflow and oil spout
The complex optimum of modifying factor is then the security mechanism of key, it should be noted that although ignition advance angle is also an influence
Factor, but often according to engine water temperature, this key influence factor carries out opened loop control in practical application, therefore ignore herein a little
The influence of fiery advance angle.For engine speed, those skilled in the art wish to have when starting rational upper punching with
Ensure to start safety, in order to realize this target, in the preset air amount and Fig. 6 when needing to starting the engine design phase
The oil spout modifying factor in stage 1 optimize；The lower overshoot that cannot have rotating speed when being fallen after rise from the peak of upper punching, i.e., cannot be low
It is expected that rotating speed needs the oil spout to the stage in Fig. 62 and 3 to repair to realize this target in engine shown in dotted lines in Figure 5
Positive divisor optimizes, to ensure that air-fuel ratio should not be partially dilute and rotating speed is caused to be shaken.
Specifically, table 1 to table 4 gives the practical mark between default air inflow, oil spout modifying factor and engine water temperature
The example of fixed number evidence is as follows：
Table 1 presets air inflow and the nominal data of engine water temperature
| Water temperature (DEG C) | -30 | -20 | -10 | 0 | 10 | 25 | 40 | 60 | 100 |
| Default air inflow (kg/h) | 30 | 27 | 22 | 18 | 17 | 12 | 10 | 10 | 8 |
The nominal data of table 2 the first stage oil spout factor and engine water temperature shown in fig. 6
| Water temperature (DEG C) | -30 | -20 | -10 | 0 | 10 | 25 | 40 | 60 | 100 |
| Oil spout modifying factor | 3.5 | 3.0 | 2.7 | 2.1 | 1.7 | 1.4 | 1.0 | 0.9 | 0.8 |
The nominal data of table 3 the first stage oil spout factor and engine water temperature shown in fig. 6
| Water temperature (DEG C) | -30 | -20 | -10 | 0 | 10 | 25 | 40 | 60 | 100 |
| Oil spout modifying factor | 3.5 | 3.0 | 2.7 | 2.1 | 1.7 | 1.4 | 1.0 | 0.9 | 0.8 |
The nominal data of table 4 the first stage oil spout factor and engine water temperature shown in fig. 6
| Water temperature (DEG C) | -30 | -20 | -10 | 0 | 10 | 25 | 40 | 60 | 100 |
| Oil spout modifying factor | 1.2 | 0.9 | 0.85 | 0.8 | 0.8 | 0.6 | 0.6 | 0.45 | 0.4 |
When starting the engine being closed with scheme provided by the invention, in addition to having the implementation of method shown in Fig. 1
Except whole advantageous effects of example, it can also it is expected according to engine big between rotating speed and set threshold engine speed
Small relationship designs different engine accelerated process i.e. the first control flow and the second control flow, can be directed to engine
Specific operating mode carries out targetedly starting control, in addition, due to having carried out the air inflow under different engine water temperatures, spray in advance
The oily factor is demarcated, and thereby may be ensured that can go up punching when the engine of different engine water temperatures accelerates starts to described
Machine rotary speed threshold value provides guarantee for engine start.
As shown in fig. 7, for a kind of structural schematic diagram starting control system provided in an embodiment of the present invention, the startup control
System processed includes：Engine controller 210, entire car controller 220, starter motor 230, engine 240, motor 250 and detach from
Clutch 260.
Wherein, the entire car controller 220, the enabling signal for receiving the transmission of the engine controller 210, is connecing
It receives and controls the starter motor 230 after the enabling signal the first rotating speed is accelerated to the engine 240.
The engine controller 210, for when current residual electricity is less than low battery threshold value, controlling the starter motor
230 dragging engines 240 accelerate to the first rotating speed；When the current rotating speed of the engine 240 reaches the first rotating speed, to described
Engine 240 sends engine ignition signal, so that the engine 240 enters the autonomous operation stage；Based on preset hair
Motivation it is expected that rotating speed controls the engine 240 and accelerates to the second rotating speed.
When the engine 240 reaches second rotating speed, in conjunction with separation clutch to complete engine power and P2
The coupling of motor power controls, wherein first rotating speed is the rotating speed that the engine 240 enters utonomous working state, institute
It states the second rotating speed and is approached for the engine 240 and reached in the engine expectation Rotation Process, based on speed closed loop control mode
Currently practical rotating speed when to stable state.
It should be noted that the dotted line frame in Fig. 7 indicates P2 modules.
Specifically, the entire car controller 220, for being calculated according to the speed and gear speed ratio information of target vehicle
The motor it is expected rotating speed, and the motor being calculated expectation rotating speed is sent to the engine controller 210；It is described
Engine controller 210, the motor for receiving the transmission of the entire car controller 220 it is expected rotating speed, and by the motor
It is expected that rotating speed, which is set as engine, it is expected rotating speed.
Specifically, the entire car controller 220 calculates the motor according to following formula it is expected rotating speed ndes：
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesTo be currently located the speed ratio or downshift of gear
The speed ratio of gear where after processing.
Further, the engine controller 210 is additionally operable to after the engine 240 accelerates to the second rotating speed,
Judging that the engine it is expected whether rotating speed is more than the threshold engine speed, fruit is, then into the first control flow, if
It is no, then enter the second control flow.
Wherein, first control flow is：
Engine current torque is calculated according to second rotating speed and the engine load；
It receives the expectation synchronous rotational speed of the transmission of the entire car controller 220 and reaches week time needed for the expectation rotating speed
Phase；
The torque increase for promoting rotating speed is calculated according to the expectation synchronous rotational speed and the time cycle, according to described
Current torque and the torque increase carry out speed control to the engine 240；
Second control flow is：
Speed control is carried out to the engine 240 using the engine idling of the engine 240.
When starting the engine being closed using scheme provided by the invention, starter motor first accelerates to engine
Then first rotating speed it is expected rotating speed approach, so that even if vehicle remaining capacity from engine autonomous operation and to engine
When insufficient, remain able to provide torque jointly by engine and motor to meet the torque demand of vehicle acceleration.
For system embodiments, since it is substantially similar to the method embodiment, related so describing fairly simple
Place illustrates referring to the part of embodiment of the method.Each embodiment should not be interpreted as limitation of the invention.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
One of ordinary skill in the art will appreciate that all or part of step in realization above method embodiment is can
It is completed with instructing relevant hardware by program, the program can be stored in computer read/write memory medium,
Storage medium designated herein, such as：ROM/RAM, magnetic disc, CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of startup control method, which is characterized in that the startup control method includes：
When current residual electricity is less than low battery threshold value, controls the starter motor dragging engine and accelerates to the first rotating speed,
In, first rotating speed is the rotating speed that the engine enters utonomous working state；
When the current rotating speed of the engine reaches the first rotating speed, engine ignition signal is sent to the engine, so that
The engine enters the autonomous operation stage；
It is expected that rotating speed controls the engine and accelerates to the second rotating speed based on preset engine, wherein second rotating speed is
The engine approaches the engine and it is expected working as in Rotation Process, when reaching stable state based on speed closed loop control mode
Preceding actual speed；
When the engine reaches second rotating speed, in conjunction with separation clutch to complete engine power and P2 motor powers
Coupling control.
2. startup control method according to claim 1, which is characterized in that the preset engine it is expected obtaining for rotating speed
The method is taken to include：
It is expected rotating speed according to the speed of target vehicle and gear speed ratio acquisition of information motor；
Motor expectation rotating speed is set as engine and it is expected rotating speed.
3. startup control method according to claim 2, which is characterized in that calculate the motor phase according to following formula
Hope rotating speed ndes：
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesTo be currently located speed ratio or the downshift processing of gear
The speed ratio of gear where afterwards.
4. startup control method according to claim 1, which is characterized in that the engine accelerate to the second rotating speed it
Afterwards, the startup control method further includes：
Judge that the engine it is expected whether rotating speed is more than the threshold engine speed, if it is, into the first control stream
Journey, if it is not, then into the second control flow；Wherein,
First control flow is：
Engine current torque is calculated according to second rotating speed and the engine load；
Receive the expectation synchronous rotational speed and reach the time cycle needed for the expectation rotating speed that the entire car controller is sent；
The torque increase for promoting rotating speed is calculated according to the expectation synchronous rotational speed and the time cycle；
Speed control is carried out to the engine according to the current torque and the torque increase；
Second control flow is：
Speed control is carried out to the engine using the engine idling of the engine.
5. startup control method according to claim 4, which is characterized in that the startup control method further includes：
Air inflow, the oil spout factor under different engine water temperatures are demarcated in advance；
Engine speed is controlled according to engine water temperature, air inflow, the oil spout factor.
6. startup according to claim 1 control, which is characterized in that the startup control method further includes：
The engine with it is described detach clutch combine after, based on the speed discrepancy pair between the engine and the motor
The oil pressure of the separation clutch carries out closed-loop control.
7. a kind of startup control system, which is characterized in that the startup control system includes：Engine controller, full-vehicle control
Device, starter motor, engine, motor and separation clutch；Wherein,
The entire car controller, the enabling signal sent for receiving the engine controller are receiving the startup letter
The starter motor is controlled after number, and the first rotating speed is accelerated to the engine；
The engine controller, for when current residual electricity is less than low battery threshold value, controlling the starter motor dragging hair
Motivation accelerates to the first rotating speed；When the current rotating speed of the engine reaches the first rotating speed, start to the engine
Machine ignition signal, so that the engine enters the autonomous operation stage；It is expected that rotating speed controls the hair based on preset engine
Motivation accelerates to the second rotating speed；
When the engine reaches second rotating speed, in conjunction with separation clutch to complete engine power and P2 motor powers
Coupling control, wherein first rotating speed is that the engine enters the rotating speed of utonomous working state, and second rotating speed is
The engine approaches the engine and it is expected working as in Rotation Process, when reaching stable state based on speed closed loop control mode
Preceding actual speed.
8. startup control system according to claim 7, which is characterized in that
The entire car controller it is expected to turn for the motor to be calculated according to the speed and gear speed ratio information of target vehicle
Speed, and the motor being calculated expectation rotating speed is sent to the engine controller；
The engine controller it is expected rotating speed for receiving the motor that the entire car controller is sent, and by the electricity
Machine it is expected that rotating speed is set as engine and it is expected rotating speed.
9. startup control system according to claim 8, which is characterized in that
The entire car controller calculates the motor according to following formula and it is expected rotating speed ndes：
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesTo be currently located speed ratio or the downshift processing of gear
The speed ratio of gear where afterwards.
10. startup control system according to claim 7, which is characterized in that
The engine controller is additionally operable to after the engine accelerates to the second rotating speed, judges that the engine it is expected
Whether rotating speed is more than the threshold engine speed, if it is, into the first control flow, if it is not, then into the second control
Flow processed；Wherein,
First control flow is：
Engine current torque is calculated according to second rotating speed and the engine load；
Receive the expectation synchronous rotational speed and reach the time cycle needed for the expectation rotating speed that the entire car controller is sent；
The torque increase for promoting rotating speed is calculated according to the expectation synchronous rotational speed and the time cycle, according to described current
Torque and the torque increase carry out speed control to the engine；
Second control flow is：
Speed control is carried out to the engine using the engine idling of the engine.
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