DE102008052435A1 - Drive train operating method for vehicle, involves coupling drive engine with transmission by clutch, and controlling and/or regulating drive engine after complete decoupling of drive engine from transmission - Google Patents

Abstract

The method involves coupling a drive engine (2) with a transmission by a clutch that is operatable with foot pressure. The drive engine is controlled and/or regulated by a control unit (2.1) after complete decoupling of drive engine from the transmission such that delivered torque (Mmot) of the drive engine is changed. A reference value (Mmotsoll) for the delivered torque is determined based on arising load change impacts and/or oscillations of a drive train after complete decoupling of drive engine from the transmission. An independent claim is also included for a device for operating a drive strand of a vehicle, comprising a control unit.

Description

The The invention relates to a method for operating a drive train a vehicle according to the preamble of the claim 1. The invention further relates to an apparatus for operation a drive train of a vehicle according to the The preamble of claim 16.

From the DE 101 05 322 C1 a method for operating a drive train of a motor vehicle is known in which a prime mover can be coupled by means of a foot power operated clutch with a transmission and the drive of the prime mover by means of a control device, wherein at least one target value for the output torque or at least one representing this size Size generated and output to the prime mover. Furthermore, the state of the clutch is monitored and when opening the clutch, an intervention in the setpoint specification for the prime mover. In this engagement, the setpoint for the output torque of the prime mover or for at least the size representing a variable for a first period of time to a first, deviating from a default value is set. In this case, the default value is specified by a driver by means of a power actuator. Subsequently, the setpoint is set to a, from the first setpoint and the default of the driver independent, second setpoint.

Of the Invention is based on the object, a relation to the Prior art improved method and one opposite The prior art improved apparatus for operating a Specify drive train of a vehicle, on the basis of which in particular Driving comfort can be further increased.

Regarding of the method according to the invention by the features specified in claim 1 and in terms of the device by the features specified in claim 16 solved.

advantageous Embodiments of the invention are the subject of the claims.

at the inventive method for operating a Drive train of a vehicle is at least one prime mover by means of a coupling, in particular one with foot force operable clutch, coupled to a transmission, wherein a Control of the drive machine by means of a control unit. According to the invention, after a complete Decoupling of the prime mover from the transmission, the prime mover controlled and / or regulated such that a delivered torque the drive machine is changed. This results in Advantageously, that in the decoupling of the prime mover load cycles and / or vibrations occurring from the transmission the driveline avoided or at least reduced, resulting in an increase in ride comfort and a reduction the wear of the drive train leads.

The Propulsion engine can be considered an internal combustion engine, an electric motor or as a combination of combustion and electric motor, so be designed as a so-called hybrid drive.

The Clutch can also be called a so-called automated clutch be executed, which can be actuated by an actuator is. The operation can, for example, hydraulically, pneumatically or electro-mechanically.

According to different Further developments of the method according to the invention After complete decoupling, a setpoint for the output torque of the prime mover or for at least a further representative of this size Size fixed, so that the torque the drive machine is easily controlled or regulated. As for the quantity representing torque are preferably an angular position and / or a frequency of a Oscillation of the drive machine.

alternative becomes the target value for the output torque of the prime mover or for at least one of these size representing size in dependence the size of occurring load change beats and / or vibrations of the drive train determined, resulting in a very effective reduction of load changes and / or vibrations leads.

there is used to determine the complete decoupling of the prime mover from the transmission a state of the clutch to a full opening this preferably monitored by the control unit, which is coupled in particular with a switch, by means of which the full opening of the clutch is detected. This arrangement is particularly easy to implement, reliable and robust against external influences.

to Detection of load changes and / or vibrations a motor roll torque representing this is preferred determined the drive machine and the setpoint for the output torque of the prime mover or for at least the one representing this size Size depending on the motor roll torque the drive machine determined.

According to one preferred embodiment of the invention, the target value for the output torque of the prime mover or for at least one representing this size Size from an uninfluenced sum torque the engine filtered, the filtering preferably by means of a low-pass filter and / or a band-stop filter. The uninfluenced total torque is based on the torque and the motor roll torque of the prime mover. such Filter units are characterized by high robustness and effectiveness out. Especially the band stop filter has an additional high dynamics, allowing changes in the torque output can be detected quickly and thus a quick response to these changes is possible.

alternative or additionally, the motor roll torque by means of a arranged on the drive machine and / or on the bearing elements sensor determined. This sensor is in particular a Position sensor, an acceleration sensor, a Wegstreckensensor and / or a force sensor which can be easily implemented in a vehicle are.

In a particularly advantageous embodiment of the invention is the Motor roll torque based on a signal from an active engine mount Storage of the prime mover determined in the vehicle, the damping of the active engine mount, depending on Motor roll torque is set and thus to a further reduction the load changes and / or vibrations leads.

Of the Setpoint for the output torque of the prime mover or at least the one representing this size Size becomes the control unit of the prime mover supplied, wherein by means of the control unit based on the desired value the output torque of the prime mover is adjusted. To increase the torque of the prime mover is the desired value preferably designed such that a so-called "gas shock" triggered becomes.

According to one Further development of the invention is the setting of the delivered Torque of the prime mover synchronized with the motor roll torque, what a particularly effective damping of load changes and / or vibrations.

through the adjustment of the output torque of the prime mover a reaction torque of the engine is generated, which in advantageously turn the load changes beats and / or vibrations of the drive train opposite supporting moment generated.

there depends on a size of the supporting moment directly of a magnitude of the reaction torque of the prime mover from and based on the size of the setpoint is the Torque of the engine controlled and / or regulated.

A particularly advantageous development of the invention Method, an accessory of the drive machine is controlled and / or regulated that reduces the torque of the prime mover or is increased. The accessory can, for example, as an air conditioning compressor or an electric machine running be. The electric machine can, for example, as a generator or can be operated as an electric motor and so can the output torque also increase the prime mover. The electric machine For example, it can be run as a so-called starter generator be. An adjustment of the torque by means of an accessory Above all, it has the advantage of being very fast and flexible is executable. It can also be a quick reduction the torque of the prime mover are generated.

at the device according to the invention for operation a drive train of a vehicle is at least prime mover by means of a coupling, in particular one with foot force operable clutch, coupled to a transmission, wherein the control of the prime mover by means of a control unit he follows. According to the invention by means of the control unit a complete decoupling of the engine from Gear detectable, with means for control and / or regulation the prime mover are provided, based on which at full Decoupling a delivered torque of the drive machine changeable is.

embodiments The invention will be described in more detail below with reference to drawings explained.

there demonstrate:

1 2 schematically shows a detail of a drive train of a vehicle according to the prior art,

2 schematically an uninfluenced motor roll torque of the prime mover and a rolling moment of the drive train,

3 schematically an affected motor roll torque of the prime mover and a rolling moment of the drive train.

4 schematically a control loop to Re Torque of a drive machine,

5 schematically a control path for controlling a torque of a drive machine,

6 schematically a frequency response for vibration damping when using a low-pass filter, and

7 schematically shows a schematic frequency response for vibration damping when using a band-stop filter.

each other corresponding parts are in all figures with the same reference numerals Mistake.

In 1 is a section of a drive train 1 of a vehicle according to the prior art shown, which consists of a built-in longitudinal direction of the drive motor 2 , in particular an internal combustion engine, a transmission 3 , In particular a manual transmission, and a power transmission coupled thereto 4 , in particular a propeller shaft, is formed.

Between the prime mover 2 and the transmission 3 is a foot-operated clutch 5 arranged, by means of which the drive machine 2 with the gearbox 3 is positively connected and, in particular for the insertion of different gears, ie gear ratios, is separated from the transmission, so that a power flow is interrupted.

In such drive trains 1 occur when the clutch is actuated 5 , in particular when disengaging under load, so-called load changes and / or vibrations, which by a sudden degradation of a in 3 described in more detail torque M _{Mot of} the prime mover 2 is caused. From this reduction of the torque M _Mot results in a motor _roll torque M _MotRoll , which counteracts a drive torque M _Antr . Even when engaging can load changes and / or vibrations arise.

As a housing of the prime mover 2 and a housing of the transmission 3 connected to each other, the load changes and / or vibrations transmitted to the entire drive train 1 ,

This motor _{roll torque} M _MotRoll and a _roll moment M _{AntrRoll of} the drive train 1 are in the 2 as a function of time t shown in more detail.

To counteract this motor _{roll torque} M _MotRoll , it is inventively provided that after a complete decoupling of the drive _machine 2 from the transmission 3 the prime mover 2 is controlled and / or regulated so that an output from this torque M _{Mot is} increased or decreased.

By means of this increase or decrease of the torque M _Mot become a reaction torque of the prime _mover 2 and consequently generates a support torque which counteracts or dampens the motor _{roll torque} M _MotRoll and thus the load change impacts and / or vibrations.

To detect the complete decoupling of the prime mover 2 from the transmission 3 the prime mover 2 Preferably, a non-illustrated switch is provided which a complete opening of the clutch 5 detected. This state of the coupling is in turn by means of a in 4 shown control unit 2.1 the prime mover 2 supervised.

The change of the torque M _Mot is alternatively also in a design of the transmission 3 applicable as an automatic transmission, since in such transmissions when changing the speed levels also load changes and / or vibrations may occur.

Such an affected motor _{roll torque} M _MotRoll is in 3 shown in more detail. In this case, a desired value M _MotSoll for the torque M _{Mot of} the drive _machine to be output can be _{predetermined,} for example, on the basis of a characteristic or is determined as a function of the magnitude of the occurring load change impacts and / or vibrations.

Alternatively or additionally be desired values ω _MotSoll, φ _MotSoll for the torque to be delivered M _Mot representing sizes such as a roll rate ω _Mot or an angular position φ _Mot of the drive machine 2 , fixed or determined as a function of the occurring load change beats and / or vibrations.

A size of the supporting torque depends in particular directly on a size of the reaction torque of the drive machine 2 from, so that on the basis of the size of the setpoint M _MotSoll , ω _MotSoll or φ _MotSoll the torque M _{Mot of} the _{prime mover} to be delivered 2 will be changed.

In 4 schematically is a control loop R for controlling the drive machine 2 illustrated, wherein for controlling the torque to be delivered M _{Mot of} the prime mover 2 the control loop R is supplied as a reference variable of the setpoint M _{MotSoll of} the torque M _Mot to be delivered.

A regulator 6 , which is designed for example as a P controller, is applied to the setpoint M _{MotSoll of} the torque to be delivered M _Mot and performs the value of the torque to be delivered M _Mot the _{prime mover} 2 or the control unit 2.1 to, by means of which a control of the prime mover 2 he follows.

As a disturbance variable in the illustrated embodiment, the motor _{roll torque} M _{MotRoll is} provided, which is the unwanted change in the controlled variable, ie the torque M _{Mot of} the drive unit 2 , represents.

The motor _{roll torque} M _MotRoll is thereby by means of a on the _{prime mover} 2 and / or a bearing element of this arranged sensor 7 determined. The sensor 7 is preferably an acceleration sensor, a travel distance sensor and / or a force sensor.

Alternatively or additionally, the motor _{roll torque} M _{MotRoll can} also be _detected by means of a so-called active or adjustable motor _bearing whose damping is adjustable and is preferably set as a function of the detected motor _{roll torque} M _MotRoll .

Due to the feedback of the controlled variable, ie the torque M _{Mot of} the drive unit 2 , By means of the illustrated control circuit R, an effective avoidance or reduction of the load changes and / or vibrations can be achieved.

To a damping control or a position control of the prime mover 2 be performed, as an alternative to the direct control of the torque M _{Mot of} the drive unit 2 the controlled variables shown in parentheses, ie the rolling speed ω _Mot or the angular position φ _Mot , the prime mover 2 regulated, since these are the motor _{roll torque} M _MotRoll , ie the load changes beats and / or vibrations represent. In this case, the _reference values ω _MotSoll , φ _{MotSoll of} the rolling speed ω _Mot or the angular position φ _{Mot are} provided as command values.

In a non-illustrated embodiment of the invention will be an alternative or in addition to the prime mover 2 one or more auxiliary units regulated and / or activated and deactivated such that the torque M _{Mot of} the prime mover 2 is reduced or increased. The ancillary units may be, for example, an air conditioning compressor of a vehicle air conditioning system, a generator and / or an electric motor, by their activation and / or deactivation of a change in the torque M _{Mot of} the prime mover 2 is achievable.

5 schematically shows a control distance S for controlling the torque M _{Mot of} the drive machine 2 which is a control element 8th includes. The control element 8th can according to a further embodiment of the invention not shown in the control unit 2.1 the prime mover 2 be integrated. The control member 8th In addition to the command variable, ie, the setpoint M _MotSoll the torque M _Mot , the setpoint ω _MotSoll the roll speed ω _Mot or the setpoint φ _MotSoll the angular position φ _Mot , a signal 0 is supplied, which is the fully open state of the clutch 5 is reproduced and preferably generated by the switch for monitoring the coupling state.

The prime mover 2 or its control unit 2.1 this is the torque M _Mot to be delivered, in turn, the motor _{roll torque} M _MotRoll acts as a disturbance.

According to a further development of the invention, not shown, the setting of the torque M _Mot to be _{output is} synchronized with the motor _roll torque M _MotRoll . In this case, especially at a zero crossing of the motor _roll torque M _MotRoll the torque M _{Mot of} the _{prime mover} 2 so controlled, in particular by means of a "gas shock" increases that this counteracts the motor _{roll torque} M _MotRoll or generated this counteracting support torque. To detect the zero crossing of the motor _{roll torque} M _MotRoll additional means, such as an acceleration, distance and / or force sensor, required.

Alternatively, it is also possible to set the torque M _Mot to be output, which is not synchronized with the motor _roll torque M _MotRoll . In this case, the torque M _{Mot is} preferably at a certain time after the complete opening of the clutch 5 ie after complete disconnection of the drive train 1 , changed, in particular by a "gas shock" increases, which in turn counteracts the motor _{roll torque} M _MotRoll . This "unsynchronized" setting has the advantage that no additional sensors are required to detect the motor _{roll torque} M _MotRoll .

The control of the torque M _{Mot of} the prime mover 2 By means of the illustrated control path S, in particular, has the advantages that no additional sensor technology required, which of the drive machine 2 Torque M detected _Mot and thus leads to a low implementation and / or development effort.

To generate the setpoint M _MotSoll for the torque to be output M _{Mot of} the _{prime mover} 2 or for at least one of these setpoint M _MotSoll representing setpoint ω _MotSoll or φ _MotSoll a filter unit 8.1 provided, which in particular in the control member 8th is integrated. The filter unit 8.1 is for example a low-pass filter or a band-stop filter.

In 6 a frequency response F1 of the oscillatory system and a frequency response F2 of the low-pass filter are shown. Due to the low-pass filtering of the setpoint M _MotSoll , the load _fluctuations and / or oscillations, as can be seen on the frequency response F3 of the damped system, can be reduced. In this case, an uninfluenced total torque, which is composed of the torque M _Mot and the motor _roll torque M _MotRoll , through the low-pass filter and its damping effect by means of the supply of the setpoint M _MotSoll to the _{prime mover} 2 attenuated.

A further improvement is a use of a band-stop filter whose frequency response F4 in 7 is shown. By a band-stop _{filtering of} the setpoint M _MotSoll , which is located in a resonance range of the oscillatory system, load changes and / or vibrations can be reduced. This reduction is achieved by supplying the desired value M _MotSoll , which is in the resonance range of the motor _{roll torque} M _MotRoll or the load changes beats and / or vibrations. This can be seen in the differences between the frequency response F1 of the oscillatory system and the frequency response F3 of the damped system. The resonance range is in particular a critical frequency range, which is around the natural frequency of the drive train 1 , for example, about 7 Hertz, is. that the load changes and / or vibrations in the torque M _{Mot are} compensated.

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

• - DE 10105322 C1 [0002]

Claims (23)

Method for operating a drive train ( 1 ) of a vehicle, in which at least one prime mover ( 2 ) by means of a coupling ( 5 ), in particular a foot-operated clutch ( 5 ), with a transmission ( 3 ) is coupled and a control of the prime mover ( 2 ) by means of a control unit ( 2.1 ), characterized in that after a complete decoupling of the drive machine ( 2 ) from the gearbox ( 3 ) the prime mover ( 2 ) is controlled and / or regulated such that a delivered torque (M _Mot ) of the drive machine ( 2 ) will be changed. A method according to claim 1, characterized in that after complete decoupling a setpoint (M _MotSoll ) for the output torque (M _Mot ) of the _{prime mover} ( 2 ) or for at least one size representing size fixed or depending on the size of occurring load changes beats and / or vibrations of the drive train ( 1 ) is determined. Method according to Claim 2, characterized in that the desired value (M _MotSoll ) for the output torque (M _Mot ) of the drive _machine ( 2 ) or for at least one size representing this variable as a function of a motor _{roll torque} (M _MotRoll ) of the _{prime mover} ( 2 ) is determined. Method according to Claim 3, characterized in that the desired value (M _MotSoll ) for the output torque (M _Mot ) of the drive _machine ( 2 ) or for at least one size representing this variable from an uninfluenced total torque of the prime mover ( 2 ) is filtered. A method according to claim 3 or 4, characterized in that the motor _{roll torque} (M _MotRoll ) by means of a on the _{prime mover} ( 2 ) and / or arranged on the bearing elements sensor ( 7 ) is determined. Method according to one of claims 3 to 5, characterized in that the motor _{roll torque} (M _MotRoll ) based on a signal of an active engine mount for _supporting the engine ( 2 ) is determined in the vehicle. A method according to claim 6, characterized in that the damping of the active engine mount in dependence on the motor _{roll torque} (M _MotRoll ) is set. Method according to one of claims 2 to 7, characterized in that the desired value (M _MotSoll ) for the output torque (M _Mot ) of the _{prime mover} ( 2 ) or at least the size of the control unit representing this size ( 2.1 ) of the prime mover ( 2 ), wherein by means of the control unit ( 2.1 ) based on the desired value (M _MotSoll ) the output torque (M _Mot ) of the _{prime mover} ( 2 ) is set. A method according to claim 8, characterized in that the adjustment of the output torque (M _Mot ) of the prime mover ( 2 ) is synchronized with the motor _{roll torque} (M _MotRoll ). Method according to one of claims 1 to 19, characterized in that by means of the adjustment of the output torque (M _Mot ) of the drive machine ( 2 ) a reaction torque of the prime mover ( 2 ) is produced. A method according to claim 10, characterized in that by means of the reaction torque of the drive machine ( 2 ) the load cycles and / or oscillations of the drive train ( 1 ) opposite supporting moment is generated. A method according to claim 11, characterized in that a magnitude of the support torque directly from a magnitude of the reaction torque of the prime mover ( 2 ) and based on the size of the setpoint (M _MotSoll ) the torque (M _Mot ) of the _{prime mover} ( 2 ) is controlled and / or regulated. Method according to one of claims 1 to 12, characterized in that an auxiliary unit of the drive machine ( 2 ) is controlled and / or regulated such that the torque (M _Mot ) of the drive machine ( 2 ) is reduced or increased. Method according to one of claims 1 to 13, characterized in that for determining the complete decoupling of the drive machine ( 2 ) from the gearbox ( 3 ) a state of the coupling ( 5 ) to fully open this by means of the control unit ( 2.1 ) is monitored. A method according to claim 14, characterized in that the complete opening of the coupling ( 5 ) is detected by means of a switch. Device for operating a drive train ( 1 ) of a vehicle, in which at least one prime mover ( 2 ) by means of a coupling ( 5 ), in particular a foot-operated clutch ( 5 ), with a transmission ( 3 ) is coupled and the control of the prime mover ( 2 ) by means of a control unit ( 2.1 ), characterized in that by means of the control unit ( 2.1 ) a complete decoupling of the prime mover ( 2 ) from the gearbox ( 3 ) is detectable, wherein means for controlling and / or regulating the drive machine ( 2 ) intended are, on the basis of which, with complete decoupling a delivered torque (M _Mot ) of the prime mover ( 2 ) is changeable. Apparatus according to claim 16, characterized in that at least one filter unit ( 8.1 ), in particular a low-pass filter and / or a band-stop filter, is provided, on the basis of which a desired value (M _MotSoll ) for the output torque (M _Mot ) of the drive _machine ( 2 ) or for at least one quantity representing this variable from an uninfluenced total torque of the prime mover ( 2 ) is filterable. Apparatus according to claim 16 or 17, characterized in that means are provided, on the basis of which load changes beats and / or vibrations of the drive train ( 2 ) are detectable. Device according to claim 18, characterized in that the means comprise a sensor ( 7 ) and / or comprise an adjustable engine mount, by means of which a motor _{roll torque} (M _MotRoll ) representing the load changes and / or vibrations can be determined. Device according to claim 19, characterized in that the sensor ( 7 ) is a position sensor, an acceleration sensor, a Wegstreckensensor and / or a force sensor. Device according to one of claims 16 to 20, characterized in that one or more auxiliary units in such a way with the drive machine ( 2 ) are coupled such that the torque (M _Mot ) of the prime mover ( 2 ) is adjustable by means of a control and / or regulation of the ancillaries. Apparatus according to claim 21, characterized that the ancillaries at least one generator, an air conditioning compressor and / or an electric motor. Device according to one of claims 16 to 22, characterized in that a with the control unit ( 2.1 ) connected switch for detecting a complete opening of the coupling ( 5 ) is provided, based on the complete opening of the coupling ( 5 ) the complete decoupling of the prime mover ( 2 ) from the gearbox ( 3 ) can be determined.