DE102007003726A1 - Internal-combustion engine's vehicle drive train operating method for use in e.g. car, involves adjusting negotiability of switching element to reference value for switching off engine, and adjusting speed of engine to speed of output side - Google Patents

Internal-combustion engine's vehicle drive train operating method for use in e.g. car, involves adjusting negotiability of switching element to reference value for switching off engine, and adjusting speed of engine to speed of output side

Info

Publication number
DE102007003726A1
DE102007003726A1 DE200710003726 DE102007003726A DE102007003726A1 DE 102007003726 A1 DE102007003726 A1 DE 102007003726A1 DE 200710003726 DE200710003726 DE 200710003726 DE 102007003726 A DE102007003726 A DE 102007003726A DE 102007003726 A1 DE102007003726 A1 DE 102007003726A1
Authority
DE
Germany
Prior art keywords
combustion engine
internal combustion
speed
switching element
mot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE200710003726
Other languages
German (de)
Inventor
Peter Schiele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Priority to DE200710003726 priority Critical patent/DE102007003726A1/en
Publication of DE102007003726A1 publication Critical patent/DE102007003726A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00External control of clutches
    • F16D48/06Control by electric or electronic means, e.g. of fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • B60W10/023Fluid clutches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B60W10/11Stepped gearings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
    • B60W30/18Propelling the vehicle
    • B60W30/192Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W2510/00Input parameters relating to a particular sub-units
    • B60W2510/06Combustion engines, Gas turbines
    • B60W2510/0638Engine speed
    • B60W2510/0647Coasting condition
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00External control of clutches by electric or electronic means
    • F16D2500/30Signal inputs
    • F16D2500/306Signal inputs from the engine
    • F16D2500/3067Speed of the engine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00External control of clutches by electric or electronic means
    • F16D2500/30Signal inputs
    • F16D2500/306Signal inputs from the engine
    • F16D2500/3069Engine ignition switch
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00External control of clutches by electric or electronic means
    • F16D2500/30Signal inputs
    • F16D2500/308Signal inputs from the transmission
    • F16D2500/3081Signal inputs from the transmission from the input shaft
    • F16D2500/30816Speed of the input shaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00External control of clutches by electric or electronic means
    • F16D2500/30Signal inputs
    • F16D2500/308Signal inputs from the transmission
    • F16D2500/3082Signal inputs from the transmission from the output shaft
    • F16D2500/30825Speed of the output shaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00External control of clutches by electric or electronic means
    • F16D2500/50Problem to be solved by the control system
    • F16D2500/504Relating the engine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00External control of clutches by electric or electronic means
    • F16D2500/50Problem to be solved by the control system
    • F16D2500/508Relating driving conditions
    • F16D2500/50883Stop-and-go, i.e. repeated stopping and starting, e.g. in traffic jams
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00External control of clutches by electric or electronic means
    • F16D2500/70Details about the implementation of the control system
    • F16D2500/704Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70422Clutch parameters
    • F16D2500/70438From the output shaft
    • F16D2500/7044Output shaft torque

Abstract

The invention relates to a method for operating a vehicle drive train (2) with an internal combustion engine (4) which can be actuated via an MSA system (3) for operating state-dependent activation and deactivation, and an output (5) which can be brought into operative connection with one another via a connection device (6) are described. The connecting device (6) has at least one switching element (10, 10A) designed with a state of operation that can be varied as a function of the operating state. The transmission capability of the switching element (10, 10A) is in overrun operation of the vehicle drive train (2) and in the presence of a request of the MSA system (3) for switching off the internal combustion engine (4) to a variable depending on an operating condition of the vehicle drive train (2) first setpoint set to which via the switching element (12) torque is feasible and to which a speed of the internal combustion engine (4) and a speed of the output (5) or to a speed of the output (5) equivalent speed is adjusted.

Description

  • The The invention relates to a method for operating a vehicle drive train according to the preamble of claim 1 closer defined type.
  • From the EP 1 070 870 B1 an apparatus for actuating a starting clutch, which is designed as a hydraulic clutch is provided. The starting clutch is arranged in a transmission of a vehicle. In addition, a function for interrupting engine idling control is provided so that under predetermined conditions when the vehicle is at a standstill, an engine of the vehicle is automatically shut down. A hydraulic oil pressure in the starting clutch is controlled by a linear solenoid valve arranged in a hydraulic circuit. The hydraulic circuit has a hydraulic oil pressure source, which is designed as a hydraulic oil pump. In addition, a first hydraulic oil pressure command means that sets, at the time of starting a vehicle with the engine off, the hydraulic oil pressure command value in the starting clutch controlled by the linear solenoid valve to a predetermined initial pressure until the hydraulic oil pressure in the hydraulic circuit increases.
  • Of the Initial pressure is lower than the creeping pressure at which creep of the vehicle occurs. In addition, a second hydraulic oil pressure command means provided that during a predetermined period of time from a time when the hydraulic oil pressure in the Hydraulic circuit has risen to a point in time the hydraulic oil pressure reaches the creeping pressure, the hydraulic oil pressure command value changed to an ineffective lift elimination pressure, the higher than the creeping pressure. In addition, a third hydraulic oil pressure command means provided that the hydraulic oil pressure command value on the Creep pressure changes after the predetermined period of time has passed.
  • From the US 6,926,639 B2 A method for operating an internal combustion engine and an automatic transmission of a vehicle for reducing events affecting ride comfort during a shutdown operation of the internal combustion engine of the vehicle is described, wherein the method combines a start-stop operation of the internal combustion engine with an idling operation in the transmission. In this case, a drive pressure in the transmission is reduced during idling operation to interrupt torque transmission between the engine and the output when the vehicle is stationary to save fuel when the engine is switched on.
  • While The procedure monitors whether a request for Shutdown of the vehicle is present. The control pressure of a friction clutch is at an idle pressure, which is the power flow in the transmission is interrupted, set when a request to stop of the vehicle is determined. Subsequently, the control pressure is monitored and the internal combustion engine is switched off in the presence of the idling pressure. In contrast, when there is a request to start the vehicle and for starting the internal combustion engine, the control pressure of the frictional Clutch raised during the starting process of the internal combustion engine, wherein the increase of the driving pressure of the frictional Clutch functionally dependent on a position of the throttle the internal combustion engine after the start of the internal combustion engine is. Additionally, it is intended during the procedure that the control pressure during connection and disconnection the internal combustion engine maintained at the level of the idling pressure becomes.
  • at Another variant of the method is the internal combustion engine switched off with the clutch open and then monitored, Whether there is a request for starting the internal combustion engine. If there is a request to connect the internal combustion engine, this is started with the clutch open and the clutch during operation of the internal combustion engine in the open state held. In addition, when determining a vehicle standstill opened the clutch, the engine only then switched off when the clutch is open.
  • The Both methods described above are for reducing a Fuel consumption of a vehicle provided, in principle an internal combustion engine automatically shut off when the vehicle is stationary and, for example, in the presence of a driver-side approach request, is restarted. For this purpose are so-called engine start automatic systems (MSA systems) provided. In the with the above procedures powered vehicles with MSA systems becomes the internal combustion engine partially disabled during a coasting of the vehicle or only when reaching vehicle standstill out of service taken.
  • The disadvantage here is that too early shutdown of an internal combustion engine unnecessarily frequent starting operations of the internal combustion engine has the consequence, since different operating state curves do not allow a shutdown of the internal combustion engine. If the internal combustion engine is deactivated, for example, during a coasting process of a vehicle due to a traffic light switched to red, and the traffic light switches back to green when the vehicle is still rolling, the internal combustion engine is to be switched back on to a driver side Desire to continue to travel. However, such a driver's request is feasible only with a low spontaneity. Furthermore, the power flow for a shutdown of the internal combustion engine during the coasting of a vehicle by canceling a transmission capability of a transmission input clutch of a transmission device or by canceling the power flow in the transmission device by designing a gear ratio to cancel, but this leads to a loss of engine thrust torque and a change the noticeable for the driver vehicle change leads.
  • Becomes the internal combustion engine only when reaching the vehicle standstill switched off, the internal combustion engine is via a so-called Idle control during overrun of the powertrain of the vehicle or during the Ausrollvorgangs of the vehicle until the vehicle is at a standstill, however, which in turn consumes fuel.
  • Of the The present invention is therefore based on the object, a method for operating a vehicle powertrain to provide, by means of which a fuel consumption in comparison can be reduced to known vehicle systems and a thrust moment an internal combustion engine possible longest available stands.
  • According to the invention this task with a method according to the features of claim 1.
  • at the method of operation according to the invention a vehicle powertrain with one to the operating state-dependent Activation and deactivation via an MSA system Internal combustion engine and an output, which via a connecting device can be brought into operative connection with each other, wherein the connecting device at least one operating state-dependent variable transmissibility has trained switching element, the transmission capability of the switching element in the overrun mode of the drive train and in presence a request of the MSA system to shut down the internal combustion engine to one depending on an operating state of the drive train variable first setpoint to which about the Switching element torque is feasible and to which a speed the internal combustion engine to a speed of the output or to a adapted to the speed of the output equivalent speed becomes.
  • With the procedure according to the invention is compared to conventional vehicle systems an additional Fuel savings through extended use of fuel cut-off an internal combustion engine until near the vehicle standstill or the engine arrest achieved without the aforementioned disadvantages, wherein the internal combustion engine during a coasting of a vehicle and an intended automatic stop of the internal combustion engine with activated fuel cut, in the of the internal combustion engine no Fuel is consumed until near the vehicle is stationary To keep fuel cut-off mode throughout and throughout Operating state course of the startup a drag torque upright to keep.
  • at an advantageous variant of the invention Procedure becomes the first set point of the transmission capability of the switching element as a function of the speed of the internal combustion engine varies to from rotational irregularities of the internal combustion engine resulting vibrations, which are activated with fuel cut the internal combustion engine below a speed threshold of the speed of Internal combustion engine occur and affect driving comfort, to reduce in a simple way. For this is the transmission capability of the switching element at decreasing speed of the internal combustion engine reduces and slip set in the range of the switching element to the internal combustion engine over the slipping switching element increasingly from the drive train or decoupling from the output, where still a part of the thrust torque the internal combustion engine via the switching element on the output is applied.
  • The latter Procedure is optional, as rotational irregularities the internal combustion engine also assigned by one of the internal combustion engine Torsionsdämpfer are damped. Is the internal combustion engine associated with a torsion damper, the switching element is over the entire operating state course preferably slip-free and with low tax and regular expenses operable.
  • In a further advantageous variant of the method according to the invention, a shift request for engaging a transmission in a transmission device of the connection device is executed when the speed of the internal combustion engine at the time of the shift request is greater than a limit value. Thus, for example, during a coasting phase of a vehicle requested by a shift program control circuit by means of a certain gear for the engine shutdown is set to preferably to improve Abstellkomfort during Ausrolivorgangs at speeds of the internal combustion engine is greater than the limit of the speed of the internal combustion engine executed. However, the connection of the internal combustion engine to the output in overrun operation of the drive train remains via a corresponding control of the switching element and a concomitant adjustment of the transfer capability of the switching element obtained.
  • Becomes during a Ausrollvorgangs a vehicle preferably adaptable threshold value of the speed of the internal combustion engine, which is greater or less than a nominal idling speed of the internal combustion engine it can be below, it is at a further advantageous Variant of the inventive method provided that the transmission capability of the switching element an operating state dependent variable second Setpoint is set, which is preferably smaller than the first Setpoint is. This is the case with certain operating state curves a drive train required, a slip value of the switching element to increase from rotational irregularities of the Internal combustion engine to avoid resulting operating noise. Furthermore, a still completely closed switching element by adjusting the transmission capability of the Switching element to the operating state dependent variable second set point is converted into a so-called slip-controlled state, to ensure a high level of ride comfort. It is which is at the level of the second set point of the transmission capacity the switching element adjusting target slip speed of the switching element for the slip control of the switching element preferably of several operating parameters, such as the speed of the internal combustion engine, the temperature of the internal combustion engine, a temperature of a transmission device and the like, depending and dependent the operating parameters variable. This is a vehicle powertrain in a simple manner depending on an operating state course or in each case depending on the currently available Operating point operable.
  • Becomes with increasing duration of a Ausrollvorgangs a preferably adaptable second threshold of the speed of the internal combustion engine, the smaller be as the first threshold of the speed of the internal combustion engine can, falls below, the transmission capacity of the switching element in a further advantageous variant of The method according to the invention is dependent on an operating state changeable third setpoint, the smaller as the second setpoint of the transmission capability of the switching element is.
  • there is the switching element in a fully open State transferable, for example, if no sufficient pressure supply more through a transmission main oil pump is guaranteed. In extreme cases corresponds the second threshold of the engine speed zero 1 / min. This is for example by an electrically operated Additional oil supply feasible, with one of the one deficiency supply of the switching element by the transmission main oil pump at low speeds the internal combustion engine is at least partially compensated. With This approach is the simple way the possibility Leak internal combustion engine and down to zero 1 / min while the vehicle is still coasting. This is as soft as possible Ausrollvorgang the internal combustion engine without compression shaking and the highest possible Abstellkomfort achieved.
  • at a further advantageous variant of the invention Procedure is the transmission capability of the Switching element set to a fourth setpoint, the smaller as the first setpoint and to that during a go-around the internal combustion engine from the output via the switching element in the direction of the engine oscillations in the drive train less than in the presence of the switching element with a first Setpoint corresponding transmission capacity are when a driver-side accelerator operation in overrun of the vehicle drive train is detected.
  • Consequently exists in a simple way when recognizing a driver's request, as a gas during a coasting, the a starting of the internal combustion engine requires, independently from a threshold value of the rotational speed of the internal combustion engine, the transmission capability of the switching element to start the engine by an internal combustion engine associated with the starting system or by a reinstating combustion or injection of fuel by a lower gear take-up torque positive to influence or on the vibration behavior of the vehicle drive train to positively influence when starting the internal combustion engine.
  • In a further advantageous variant of the method according to the invention is in a driver-side accelerator pedal operation in overrun of the vehicle drive train and at a speed of the internal combustion engine smaller than a threshold to which a start-up of the internal combustion engine by reintroduced combustion in the internal combustion engine from the overrun operation of the internal combustion engine is still feasible, the transmission capability of the switching element is set to a value at which the speed of the internal combustion engine is independent of the speed of the output to zero feasible. Thus, the knowledge is taken into account that there is a so-called limiting speed of the internal combustion engine depending on the particular starting system for the internal combustion engine up to which a start-up of the internal combustion engine alone by a reintroduced combustion from the coasting phase of the internal combustion engine is possible and below wel cher the internal combustion engine can only be restarted via an activated and the internal combustion engine associated start system. Below this limit speed or the third threshold value of the speed of the internal combustion engine, the internal combustion engine, for example, by fully opening the switching element as fast as possible allows to assume zero speed and provide a so-called falling through the speed of the engine to restart the engine via the associated start system within to enable short periods of time.
  • at further advantageous variants of the invention Procedure, it is provided that an activated idling control the internal combustion engine is deactivated or an activation of the idle control the internal combustion engine is omitted to the highest possible To save fuel. It is the willingness for the above-described procedure of the invention for example, from a transmission control unit to an engine control unit in the form of a control signal over conventional Connections, such as a CAN bus, communicable to allow the internal combustion engine be converted into a corresponding operating mode is and, for example, the idle control of the internal combustion engine is not activated when a set idling speed is reached, but the fuel cut-off, if necessary, to stop the Internal combustion engine remains activated.
  • in principle is the method according to the invention in vehicle drive trains applicable, which with hydrodynamic fasteners, such as hydraulic couplings or hydrodynamic torque converters, which a lock-up clutch or a converter lock-up clutch is assigned, applicable. Furthermore, the invention is Method also suitable for vehicle drive trains, which are each executed with a frictional start-up clutch are an internal combustion engine with the output of a vehicle bring into operative connection. Additionally or alternatively there is also the possibility of vehicle drive trains to operate with the method according to the invention, at what startup in a conventional manner by means of clutches or as a switching brakes of a transmission device executed starting elements, via which an operative connection between the internal combustion engine and an output of a vehicle is made.
  • Further Advantages and advantageous developments of the invention result from the claims and the reference to the drawing principle described embodiment. It shows:
  • 1 a simplistic representation of a vehicle and
  • 2 different courses of operating parameters of the vehicle drive train of the vehicle according to 1 over time during a coasting operation of the vehicle, which divide during the operation of the vehicle drive train according to the invention.
  • In 1 is a highly schematic representation of a vehicle 1 shown with a vehicle drivetrain 2 is trained. The vehicle powertrain 2 In the present case, this includes an operating state-dependent connection and disconnection via an engine start-automatic system 3 (MSA system) operable internal combustion engine 4 and a downforce 5 that have a connection device 6 can be brought into operative connection with each other.
  • The connection device 6 has a transmission device 7 with a plurality of hydraulically actuated switching elements, by a hydraulic system, not shown, of the transmission device 7 that a transmission main pump 8th includes, that of the internal combustion engine 4 is driven by a gear shaft, be acted upon with hydraulic fluid. The hydraulic fluid is supplied by the transmission main pump 8th from a transmission oil sump 9 aspirated and conveyed in hydraulic lines of the hydraulic system. A system pressure and the driving pressures for the switching elements are set operating state-dependent via an electric transmission control unit and electrically or electro-hydraulically actuated actuators.
  • The transmission device 7 is presently designed as an automatic transmission and can in further embodiments of the vehicle 1 or the vehicle drive train 2 also be designed as an automated manual transmission or the like.
  • In addition, the connection device 6 with at least one switching element that is designed to vary in operating state with variable transmission capacity 10 respectively 10A executed, by means of which the operative connection between the internal combustion engine 4 and the downforce 5 in the manner described during a coasting of a vehicle or in overrun operation of the vehicle drive train 2 is adjustable. Here is the switching element 10 in this case, a hydrodynamic torque converter 11 with associated torque converter lockup clutch 12 while the switching element 10A in this case, a clutch of the transmission device 7 which is to represent a translation stage in the transmission device 7 is provided, wherein the operative connection between the internal combustion engine 4 and the downforce 5 with the switching element open 10A is interrupted. In addition, the operative connection between the internal combustion engine 4 and the downforce 5 when the converter lockup clutch is fully open 12 as well as at speeds of the internal combustion engine 4 near an engine idle speed 4 very low, so the internal combustion engine 4 at the latter speeds of the internal combustion engine 4 with the converter lock-up clutch open 12 also essentially from the downforce 5 is decoupled.
  • The method according to the invention will be described below with reference to the illustration according to FIG 2 due to an inventive operation of the converter lockup clutch 12 described in more detail, wherein the procedure according to the invention by an equivalent to the nachbeschriebenen operation of the lockup clutch operation of the switching element 10A to the same extent is feasible.
  • 2 shows several courses of various operating parameters of the vehicle drive train 2 over time t during a coasting phase of the vehicle 1 regardless of whether a service brake of the vehicle 1 operated by the driver or not.
  • If the framework conditions for switching off the internal combustion engine, for example, by an announcement to stop the internal combustion engine by the presence of a transmission and / or an engine temperature in valid area or by fulfilling others Start criteria, are met and a corresponding driver request, such as a non-actuated accelerator pedal or the like, is the inventive Procedure started.
  • At a time T0 is the vehicle drive train 2 in overrun, in that of the unbefeuert internal combustion engine 4 depending on a transmission capability of the lockup clutch 12 standing thrust torque at the output 5 is applied. The switching element is 10A completely closed. This results in a 2 illustrated course of the vehicle speed v_fzg, which is steadily reduced to zero with increasing time t. A turbine rotational speed n_t is greater than the rotational speed n_mot at time T0 as a result of the overrun operation and likewise decreases continuously, the difference between the turbine rotational speed n_t and the rotational speed n_mot of the internal combustion engine 4 one in the region of the lockup clutch 12 set slip value corresponds.
  • At a time T1 is issued by the MSA system 3 a request for switching off the internal combustion engine 4 , wherein the speed n_mot of the internal combustion engine 4 at time T1 is greater than a fourth threshold n_mot_schwell4. An idling control of the internal combustion engine 4 which only when falling below the fourth threshold value n_mot_schwell4 the speed of the internal combustion engine 4 is activated is not activated. Passes the request for switching off the internal combustion engine 4 at speeds of the internal combustion engine 4 less than the fourth threshold n_mot_schwell4 the speed of the internal combustion engine 4 , is the previously activated idle control of the internal combustion engine 4 disabled. At the same time, the transmission capability of the lockup clutch becomes 12 at time T1 to a function of an operating condition of the vehicle drive train 2 variable setpoint, to which via the lockup clutch 12 Torque is feasible and to which the speed n_mot of the internal combustion engine 4 to a speed of the output 5 or at one to the speed of the output 5 equivalent speed is adjusted.
  • In this case, one preferably during the Ausrollvorgangs of the vehicle 1 opened torque converter lockup clutch 12 transferred to the regulated operation or the converter lockup clutch 12 closed to an operative connection between the output 5 and the internal combustion engine in the overrun fuel cutoff 4 manufacture. The first setpoint of the transmission capability of the torque converter lockup clutch 12 is present in dependence of the speed n_mot of the internal combustion engine 4 changed, so that with decreasing speed n_mot of the internal combustion engine 4 the slip in the area of the lockup clutch 12 increases.
  • At a time T2, the transmission control unit issues a target gear specification for the engine stop and a shift request. Since the speed n_mot of the internal combustion engine 4 At time T2 is greater than a limit n_mot_grenz, the shift request to insert the requested gear ratio of the transmission device 7 the connection device 6 executed. This causes the turbine speed n_t to increase to a speed corresponding to the synchronous speed of the target gear, wherein the slip in the area of the torque converter lockup clutch 12 increases and the speed n_mot of the internal combustion engine 4 during the circuit experiences essentially no change.
  • The switching process is substantially completed at a time T3 and the turbine speed n_t decreases after the time T3 together with the speed n_mot of the internal combustion engine 4 continue down. At the time T4, the speed n_mot of the internal combustion engine is below 4 a first threshold n_mot_schwell1 and the Übertra capability of the lockup clutch 12 is set to an operating state dependent variable second setpoint, which is less than the first setpoint, whereby the slip value of the lockup clutch 12 is further increased.
  • This turns into rotational nonuniformity of the internal combustion engine 4 resulting vibrations in the vehicle drive train 2 reduces noise and driving comfort affecting noise in a simple manner avoided or reduced to a ride comfort not impairing level. In this case, for example, before the time T4 is still closed lockup clutch 12 at the time T4 in a slip-controlled state or the desired slip of the already slipping operated converter lockup clutch 12 can be increased. The Solischlupfdrehzahlvorgabe for the slip control of the lockup clutch 12 is present of various operating parameters of the vehicle drive train 2 , such as the speed n_mot of the internal combustion engine 4 , the temperature of the internal combustion engine 4 , the temperature of the transmission device 7 and preferably dependent on further parameters.
  • With increasing time t, the speed n_mot of the internal combustion engine is undershot 4 at a time T5 a second threshold n_mot swells and the transmission capability of the lockup clutch 12 is set to an operating state dependent variable third setpoint that is less than the second setpoint. In the present case, the second nominal value of the transmission capability of the lockup clutch is 12 greater than zero, as by an unspecified electrically operated auxiliary pump sufficient pressure supply to the converter lockup clutch 12 is guaranteed. In gear devices which are designed without additional pump, the lockup clutch is due to the insufficient pressure supply by the transmission main pump falls below the second threshold n_mot_schwell2 the speed of the internal combustion engine in an open state, whereby the operative connection between the engine and the output of a vehicle is interrupted.
  • In the embodiment of the vehicle drive train shown in the drawing 2 can the internal combustion engine 4 run out and take the speed zero while the vehicle 1 rolls up, thus a soft rolling process can be displayed.
  • At a time T6, the rotational speed reaches n_mot of the internal combustion engine 4 a third threshold n_mot_schwell3, above a start-up of the internal combustion engine 4 purely by a reintroduced combustion from the coasting phase of the internal combustion engine 4 out is possible and below which the internal combustion engine 4 but only certain about an becoming active and the internal combustion engine 4 assigned start system can be restarted.
  • In this case, the speed curve of the speed n_mot of the internal combustion engine 4 when starting the engine 4 from the time T6 represented by the dashed line. If a driver-side accelerator pedal actuation is detected above the third threshold value n_mot_schwell3, the transmission capability of the torque converter lockup clutch becomes 12 set to a fourth setpoint, which is smaller than the first setpoint and to the during start-up of the internal combustion engine 4 at this a the start-up operation not impairing torque is applied. In addition, there are vibrations in the vehicle drive train 2 in the presence of the Wanderüberbrückungskupplung 12 with a transmission capacity corresponding to the fourth setpoint value less than if the converter lockup clutch had a transmission capability corresponding to the first setpoint value.
  • Thus, during a driver-side accelerator pedal operation, the startup of the internal combustion engine 4 necessary, the slip state of the lockup clutch 12 regardless of a motor speed threshold, for example, by increasing the target slip specification, changed or the lockup clutch 12 fully open to positively affect the start of the engine by the starting system or by a reintroduced combustion or injection by a lower transmission absorption torque and a vibration behavior of the vehicle drive train 2 during a start-up of the internal combustion engine 4 positively impacted.
  • At a time T7, the engine speed n_mot is zero, while both the turbine speed n_t and the vehicle speed v_fzg and thus the output speed of the output 5 are greater than zero. The turbine speed n_t and the vehicle speed v_fzg are equal to zero at the time T8, which follows the time T7, equal to the time when the vehicle is simultaneously switched off the internal combustion engine 4 at standstill.
  • With the method according to the invention as described above, a thrust moment during a coasting phase of a vehicle is as long as possible, ie, until it is close to the vehicle standstill, is constantly adjustable or the change of the thrust mode ments for a driver by the activation of a switching element as possible not noticeably displayed. A high level of ride comfort is achieved since the operating state or the operating behavior of a vehicle with a noticeable thrust torque at the output to the vehicle deceleration is maintained for a driver without a corresponding desired driver input.
  • Of Further is the method of the invention in a simple way, an additional fuel economy by an extended use of the fuel cut of an internal combustion engine until near a vehicle standstill or a motor standstill reached. In this case, the method according to the invention comprises an operation of a switching element of a vehicle drive train during an operation of an internal combustion engine through an MSA system to get a differential speed between the revs allow the internal combustion engine and a transmission output speed and the vehicle driveline operating condition dependent and to decouple as needed in the area of the switching element.
  • in principle enables the method according to the invention an internal combustion engine during a coasting process a vehicle and an intended automatic stop the Internal combustion engine to operate proactively and majority in the overrun fuel cut-off, while that of the internal combustion engine no fuel is consumed, keeping it close to the Vehicle standstill to maintain a thrust moment. Furthermore is about the internal combustion engine in an operating condition, in which the vehicle is not yet completely unrolled, in a driver side Accelerator pedal operation, what a so-called stop-and-go traffic situation typical, high spontaneity guaranteed become. This is due to a fast start of the internal combustion engine, as long as he has not fallen below a defined engine speed threshold has, realizable. The engine speed threshold is, for example of the internal combustion engine associated start system. So is a comfortable meshing in of a conventional pinion starter only at a speed of the internal combustion engine equal to zero feasible.
  • 1
    vehicle
    2
    Vehicle powertrain
    3
    MSA system
    4
    Internal combustion engine
    5
    output
    6
    connecting device
    7
    transmission device
    8th
    Main transmission pump
    9
    Transmission oil sump
    10 10A
    switching element
    11
    torque converter
    12
    Converter lockup clutch
    n_mot
    Engine speed
    n_mot_grenz
    Limit speed the internal combustion engine
    n_mot_schwell1
    threshold the speed of the internal combustion engine
    n_mot_schwell2
    threshold the speed of the internal combustion engine
    n_mot_schwell3
    threshold the speed of the internal combustion engine
    n_mot_schwell4
    threshold the speed of the internal combustion engine
    n_mot_LL
    Idle speed the internal combustion engine
    n_t
    Turbine speed
    t
    Time
    T0 to T8
    discreet time
    v_fzg
    vehicle speed
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
  • Cited patent literature
    • - EP 1070870 B1 [0002]
    • - US 6926639 B2 [0004]

Claims (12)

  1. Method for operating a vehicle drive train ( 2 ) one with an operating state-dependent connection and disconnection via an MSA system ( 3 ) operable internal combustion engine ( 4 ) and an output ( 5 ) connected via a connection device ( 6 ) can be brought into operative connection with each other, wherein the connecting device ( 6 ) at least one operating element with a variable transmission capacity designed switching element ( 10 . 10A ), characterized in that the transmission capability of the switching element ( 10 . 10A ) in overrun mode of the vehicle drive train ( 2 ) and if there is a requirement of the MSA system ( 3 ) for switching off the internal combustion engine ( 4 ) to a function of an operating state of the vehicle drive train ( 2 ) variable first setpoint, to which via the switching element ( 10 . 10A ) Torque is feasible and to which a speed (n_mot) of the internal combustion engine ( 4 ) is adapted to a speed of the output or to an equivalent speed to the speed of the output.
  2. Method according to Claim 1, characterized in that the first nominal value of the transmission capability of the switching element ( 10 . 10A ) as a function of the rotational speed (n_mot) of the internal combustion engine ( 4 ) is varied.
  3. A method according to claim 1 or 2, characterized in that a shift request for engaging a transmission in a transmission device ( 7 ) of the connection device ( 6 ) is executed when the engine speed (n_mot) is greater than a threshold (n_mot_grenz).
  4. Method according to one of claims 1 to 3, characterized in that the transfer capability of the switching element ( 10 . 10A ) is set to a operating state-dependent variable second setpoint, when the speed (n_mot) of the internal combustion engine ( 4 ) distinguishes a preferably adaptable first threshold value (n_mot_schwell1).
  5. Method according to one of claims 1 to 4, characterized in that the transfer capability of the switching element ( 10 . 10A ) is set to a operating state-dependent variable third setpoint, when the speed (n_mot) of the internal combustion engine ( 4 ) distinguishes a preferably adaptable second threshold value (n_mot_schwell2).
  6. Method according to one of claims 1 to 5, characterized in that in a driver-side accelerator pedal operation in overrun operation of the vehicle drive train ( 2 ) the transmission capability of the switching element ( 10 . 10A ) is set to a fourth setpoint, which is smaller than the first setpoint value and to which during start-up of the internal combustion engine ( 4 ) is applied to this one the start-up process less impairing torque and to the vibrations in the vehicle drive train ( 2 ) are lower than in the presence of the switching element ( 10 . 10A ) having a transmission capacity corresponding to the first set value.
  7. A method according to claim 1 to 6, characterized in that in a driver-side accelerator pedal operation in overrun operation of the vehicle drive train ( 2 ) and at a speed of the internal combustion engine ( 4 ) smaller than a third threshold (n_mot_schwell3), to which a start-up of the internal combustion engine ( 4 ) by reinstating combustion in the internal combustion engine from the overrun operation of the internal combustion engine ( 4 ) is still feasible, the transfer capability of the switching element ( 10 . 10A ) is set to a value at which the speed (n_mot) of the internal combustion engine ( 4 ) is independent of the speed of the output to zero feasible.
  8. Method according to one of claims 1 to 7, characterized in that the switching element ( 10 ) a hydrodynamic connecting element ( 11 ) associated lock-up clutch ( 12 ) having.
  9. Method according to one of claims 1 to 7, characterized in that the switching element is a starting clutch of the drive train is.
  10. Method according to one of claims 3 to 8, characterized in that the switching element ( 10A ) a clutch or shift brake of the transmission device ( 7 ).
  11. Method according to one of claims 1 to 10, d characterized in that an idle control of the internal combustion engine ( 4 ) is deactivated when a request for switching off the internal combustion engine ( 4 ) is present.
  12. Method according to one of claims 1 to 11, characterized in that an activation of the idle control of the internal combustion engine ( 4 ) is omitted when a request for switching off the internal combustion engine ( 4 ) before falling below a fourth threshold value (n_mot_schwell4) of the internal combustion engine ( 4 ) is present.
DE200710003726 2007-01-25 2007-01-25 Internal-combustion engine's vehicle drive train operating method for use in e.g. car, involves adjusting negotiability of switching element to reference value for switching off engine, and adjusting speed of engine to speed of output side Withdrawn DE102007003726A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200710003726 DE102007003726A1 (en) 2007-01-25 2007-01-25 Internal-combustion engine's vehicle drive train operating method for use in e.g. car, involves adjusting negotiability of switching element to reference value for switching off engine, and adjusting speed of engine to speed of output side

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710003726 DE102007003726A1 (en) 2007-01-25 2007-01-25 Internal-combustion engine's vehicle drive train operating method for use in e.g. car, involves adjusting negotiability of switching element to reference value for switching off engine, and adjusting speed of engine to speed of output side

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182250A2 (en) * 2008-10-31 2010-05-05 Zf Friedrichshafen Ag Power train
DE102009001292A1 (en) * 2009-03-03 2010-09-09 Zf Friedrichshafen Ag Method for operating drive strand of motor vehicle, involves comparing transducer creep torque with regulator creep torque, and influencing torque transmitted from hydrodynamic starting element based on comparison result
DE102010036855A1 (en) 2010-08-05 2012-02-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for controlling an internal combustion engine
DE102013205385B3 (en) * 2013-03-27 2014-04-30 Zf Friedrichshafen Ag Method for defined braking of rotating components in automatic transmission of motor vehicle during shut-off of engine, involves reporting engine shutdown over electrical system of transmission
DE102015220935A1 (en) * 2015-10-27 2017-04-27 Bayerische Motoren Werke Aktiengesellschaft Method and gear shift control device for shift point control in automatic transmissions
DE102017203348A1 (en) 2017-03-01 2018-09-06 Zf Friedrichshafen Ag Method and control device for operating a motor vehicle
DE102017215805A1 (en) 2017-09-07 2019-03-07 Zf Friedrichshafen Ag A method for defined braking of rotating parts in an automatic transmission of a motor vehicle comprising an electrically driven auxiliary oil pump when stopping the engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10246421A1 (en) * 2002-03-16 2003-09-25 Bosch Gmbh Robert Process for controlling a combustion engine and drive arrangement, reduces fuel input to engine when possible under the drive conditions
EP1357315A2 (en) * 2002-04-25 2003-10-29 JATCO Ltd Lockup control system of automatic transmission
EP1070870B1 (en) 1999-07-21 2003-11-26 Honda Giken Kogyo Kabushiki Kaisha Apparatus for controlling starting clutch in vehicle having function of stopping engine idling
US6926639B2 (en) 2003-07-02 2005-08-09 Visteon Global Technologies, Inc. Vehicle control method
DE102004030198A1 (en) * 2004-06-22 2006-02-02 Adam Opel Ag Motor vehicle control method, by interrupting fuel supply if rotation speed is greater than minimum speed and reducing gear stage if speed falls below threshold when in coasting mode
DE102004039714A1 (en) * 2004-08-17 2006-03-02 Daimlerchrysler Ag Automatic start-stop system for a vehicle motor, to reduce fuel consumption through idling when at traffic lights and the like, switches the automatic clutch with a slippage on restarting to prevent jerks

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1070870B1 (en) 1999-07-21 2003-11-26 Honda Giken Kogyo Kabushiki Kaisha Apparatus for controlling starting clutch in vehicle having function of stopping engine idling
DE10246421A1 (en) * 2002-03-16 2003-09-25 Bosch Gmbh Robert Process for controlling a combustion engine and drive arrangement, reduces fuel input to engine when possible under the drive conditions
EP1357315A2 (en) * 2002-04-25 2003-10-29 JATCO Ltd Lockup control system of automatic transmission
US6926639B2 (en) 2003-07-02 2005-08-09 Visteon Global Technologies, Inc. Vehicle control method
DE102004030198A1 (en) * 2004-06-22 2006-02-02 Adam Opel Ag Motor vehicle control method, by interrupting fuel supply if rotation speed is greater than minimum speed and reducing gear stage if speed falls below threshold when in coasting mode
DE102004039714A1 (en) * 2004-08-17 2006-03-02 Daimlerchrysler Ag Automatic start-stop system for a vehicle motor, to reduce fuel consumption through idling when at traffic lights and the like, switches the automatic clutch with a slippage on restarting to prevent jerks

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182250A2 (en) * 2008-10-31 2010-05-05 Zf Friedrichshafen Ag Power train
EP2182250A3 (en) * 2008-10-31 2014-09-10 ZF Friedrichshafen AG Power train
DE102009001292A1 (en) * 2009-03-03 2010-09-09 Zf Friedrichshafen Ag Method for operating drive strand of motor vehicle, involves comparing transducer creep torque with regulator creep torque, and influencing torque transmitted from hydrodynamic starting element based on comparison result
DE102010036855A1 (en) 2010-08-05 2012-02-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for controlling an internal combustion engine
DE102013205385B3 (en) * 2013-03-27 2014-04-30 Zf Friedrichshafen Ag Method for defined braking of rotating components in automatic transmission of motor vehicle during shut-off of engine, involves reporting engine shutdown over electrical system of transmission
DE102015220935A1 (en) * 2015-10-27 2017-04-27 Bayerische Motoren Werke Aktiengesellschaft Method and gear shift control device for shift point control in automatic transmissions
DE102017203348A1 (en) 2017-03-01 2018-09-06 Zf Friedrichshafen Ag Method and control device for operating a motor vehicle
DE102017215805A1 (en) 2017-09-07 2019-03-07 Zf Friedrichshafen Ag A method for defined braking of rotating parts in an automatic transmission of a motor vehicle comprising an electrically driven auxiliary oil pump when stopping the engine

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