CN109611546A - A kind of jerk management system and method for power transmission system of vehicle - Google Patents
A kind of jerk management system and method for power transmission system of vehicle Download PDFInfo
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- CN109611546A CN109611546A CN201910068531.7A CN201910068531A CN109611546A CN 109611546 A CN109611546 A CN 109611546A CN 201910068531 A CN201910068531 A CN 201910068531A CN 109611546 A CN109611546 A CN 109611546A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/50—Signals to an engine or motor
- F16H63/502—Signals to an engine or motor for smoothing gear shifts
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to a kind of jerk management methods of power transmission system of vehicle, the vehicle includes engine, fluid torque-converter and automatic transmission, the automatic transmission is connected with the engine by fluid torque-converter, the fluid torque-converter includes clutch, it the described method comprises the following steps: judging whether the vehicle is towing astern state, judge whether the clutch is in opening or sliding state of rubbing if the vehicle is towing astern state, if the clutch, which is in, opens or slides state of rubbing, then judge whether the gas pedal of the vehicle is in the state of stepping on, if the gas pedal of the vehicle is in and steps on state, then judge whether the difference between the automatic transmission input shaft rotating speed and the engine speed is greater than preset value, if the difference is greater than preset value, the torque for then starting the engine passes through control process.Implement jerk management method of the invention, not only meet dynamic response, but also reduce and pass through impact, improves vehicle driving.
Description
Technical field
The present invention relates to power transmission system of vehicle, in particular to the jerk management system of a kind of power transmission system of vehicle and side
Method.
Background technique
Clutch can be in opening or sliding state of rubbing in low-grade location for automatic transmission with fluid torque-converter.Vehicle is sliding
When row, due to vehicle towing astern power train, the decline of transmission input shaft revolving speed is slower；Engine enters idle speed control, idle with target
Speed is declined for control target, and engine speed is down to quickly below transmission input shaft.At this point, driver further accelerates, hair
When motivation revolving speed is higher than transmission input shaft revolving speed, vehicle becomes driving condition from towing astern state, due to driveline lash, elasticity
Deformation, hydrodynamic unit and suspension influence, and can cause the bounce of transmission input shaft revolving speed, vehicle is caused to impact.
To solve this impact, it is common practice to reduce engine torque climbing speed when accelerating, step on the throttle and step on
Plate begins to limitation torque climbing speed, but can sacrifice vehicle dynamic response.
Summary of the invention
In view of the above problems in the prior art, the purpose of the present invention is to provide a kind of impact tubes of power transmission system of vehicle
Reason method, this method solve vehicle shock problem when accelerating, drive to improve vehicle under the premise of not sacrificing dynamic response
Sailing property.
First aspect present invention provides a kind of jerk management system of power transmission system of vehicle, and the powertrain includes
Engine, fluid torque-converter and automatic transmission, the automatic transmission are connected with the engine by fluid torque-converter, institute
Stating fluid torque-converter includes clutch, and the jerk management system includes:
Towing astern condition judgment module: it for judging whether vehicle is towing astern state, is touched when the vehicle is towing astern state
Send out clutch state judgment module；
Clutch state judgment module: for judging whether the clutch is in opening or sliding state of rubbing, when it is described from
Clutch, which is in open or slide, triggers accelerator pedal position judgment module when rubbing state；
Accelerator pedal position judgment module: for judging whether the gas pedal of the vehicle is in the state of stepping on, work as institute
The gas pedal for stating vehicle is in triggering when stepping on state and passes through operating condition judgment module；
Pass through operating condition judgment module: for judging between the automatic transmission input shaft rotating speed and the engine speed
Difference whether be greater than preset value, when the difference be greater than preset value when triggering engine torque pass through control module；
Engine torque passes through control module: the torque for the engine passes through control.
Preferably, the engine torque control module includes:
Moment of torsion control submodule, the torque for controlling engine rapidly increase to operator demand's torque before passing through；
A moment of torsion control submodule is passed through, actively drop is turned round for controlling engine, and the engine speed passes through the change
Fast device input shaft rotating speed；
Rear moment of torsion control submodule is passed through, the torque for controlling engine restores to operator demand's torque.
Further, it is described pass through before moment of torsion control submodule include gas circuit moment of torsion control unit, the gas circuit torque control
Unit processed rises to operator demand's torque by certain slope K after one value of engine torque step for controlling；
Passing through a moment of torsion control submodule includes fiery road moment of torsion control unit, and the fire road moment of torsion control unit is for controlling
Engine torque is quickly down to Y；
Passing through rear moment of torsion control submodule includes fiery road moment of torsion control unit, and the fire road moment of torsion control unit is for controlling
Engine torque is by the fast quick-recovery of first-order low-pass wave to operator demand's torque.
Further, the judgment mode of the towing astern condition judgment module are as follows: judge the engine whether in not fuel feeding
In the state of run, if the engine is run in the state of not fuel feeding, towing astern condition judgment module triggering it is described from
Clutch condition judgment module；
Optionally, the judgment mode of the towing astern condition judgment module are as follows: judge whether the revolving speed of the engine is less than
Automatic transmission input shaft rotating speed, if the revolving speed of the engine is less than automatic transmission input shaft rotating speed, the towing astern state
Judgment module triggers the clutch state judgment module.
Second aspect of the present invention provides a kind of jerk management method of power transmission system of vehicle, and the method includes following steps
It is rapid:
Judge whether the vehicle is towing astern state, if the vehicle is towing astern state, enters clutch state and judge
Step；
Judge whether the clutch is in opening or sliding state of rubbing, if the clutch, which is in, opens or slides state of rubbing,
Then enter accelerator pedal position judgment step；
Judge whether the gas pedal of the vehicle is in the state of stepping on, if the gas pedal of the vehicle, which is in, steps on shape
State then enters and passes through operating condition judgment step；
Judge whether the difference between the automatic transmission input shaft rotating speed and the engine speed is greater than preset value,
If the difference is greater than preset value, enters engine torque and pass through rate-determining steps；
The torque for starting the engine passes through control process.
Further, the torque of the engine passes through control process and includes:
Preceding moment of torsion control is passed through, the torque of the engine rapidly increases to operator demand's torque；
A moment of torsion control is passed through, the engine actively turn round by drop, and the engine speed passes through the transmission input shaft
Revolving speed；
Rear moment of torsion control is passed through, the torque of the engine restores to operator demand's torque.
Further, it realizes that the torque of the engine passes through preceding control process by control gas circuit demand torque, leads to
The fiery road demand torque of control is crossed to realize that the torque of the engine passes through a little and pass through rear control process.
Further, if the difference between the automatic transmission input shaft rotating speed and the engine speed is less than or equal to
Preset value, then the torque of the engine is controlled by operator demand.
Further, the revolving speed gradient calibration of gear and the engine of the preset value based on the automatic transmission
It obtains.
Further, judge the vehicle whether be towing astern state mode are as follows: judge whether the engine is not supplying
It is run in the state of oil, if the engine is run in the state of not fuel feeding, the vehicle is in towing astern state；Or judgement
Whether the revolving speed of the engine is less than automatic transmission input shaft rotating speed, if the revolving speed of the engine is less than automatic transmission
Input shaft rotating speed, then the vehicle is in towing astern state.
Due to above-mentioned technical proposal, the invention has the following beneficial effects:
Judge whether to enter according to engine speed and automatic transmission input shaft rotating speed difference and pass through operating conditions, enters
After passing through control, the process of will be travelling through is divided into pass through before, pass through point, pass through after three different phases, each stage is differently
Engine torque is controlled, dynamic response is not only met, but also reduce and pass through impact, improves vehicle driving.
Detailed description of the invention
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical solution of the present invention
The attached drawing used is briefly described.It should be evident that drawings in the following description are only some embodiments of the invention, it is right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is a kind of flow chart of the jerk management method for power transmission system of vehicle that the embodiment of the present invention one provides；
Fig. 2 is that a kind of operating condition of passing through of the jerk management method for power transmission system of vehicle that the embodiment of the present invention one provides is known
Not and engine torque passes through control figure.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that term " first ", " second " etc. in description and claims of this specification and attached drawing
It is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that the number used in this way
According to being interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein can be in addition to illustrating herein or describing
Those of other than sequence implement.In addition, term " includes " and " having " and their any deformation, it is intended that covering is not
Exclusive includes.
Embodiment one
A kind of jerk management method of power transmission system of vehicle is present embodiments provided, the vehicle includes engine, liquid
Power torque-converters and automatic transmission, the automatic transmission are connected with the engine by fluid torque-converter, and the fluid power becomes
Square device includes clutch, the jerk management method are as follows:
The vehicle according to engine operating state, A/T gear position, accelerator pedal position comprehensive descision is first
It is no to be in towing astern state, when the vehicle is in towing astern state, judge whether the clutch is in opening or sliding state of rubbing,
When the clutch be in open or it is sliding rub state when, the engine speed be down to automatic transmission input shaft rotating speed hereinafter,
When again speeding up, according to engine speed and automatic transmission input shaft rotating speed difference, judge using different moment of torsion control
Mode.Speed difference hour passes through impact less, and engine torque is risen by operator demand's torque；When speed difference is big, worn there are larger
It more impacts, operating point is passed through according to calibration, controlled before passing through, after passing through point, passing through using different engine torques,
Front engine torque is passed through by operator demand's torque rapid increase；Passing through an engine, actively drop is turned round, and engine speed is steady
Across automatic transmission input shaft rotating speed；It passes through rear engine torque to restore by filtering to operator demand's torque, completes to pass through
Impulsive control.
As shown in Fig. 1, specific step is as follows for the jerk management method:
S01: judging whether the vehicle is towing astern state, enters step S02 if the vehicle is towing astern state.
It should be noted that the towing astern state refers to: not stepping on the gas, engine is in operating status, at this point, engine
It is rotated under effect of inertia, does not generate oil consumption.
Judge the vehicle whether be towing astern state mode are as follows: normal vehicle operation, engine is in operating status, from
Dynamic speed changer is in non-neutral position state, and power train can transmit power, and jerk management system is according to engine operating state and automatically
Transmission gear state judges that transmission chain is in bonding state.When driver unclamps gas pedal, vehicle sliding, engine is in
Operating status, system judge that the vehicle is in towing astern state.
As an alternative embodiment, system is sentenced when engine speed is less than automatic transmission input shaft rotating speed
The vehicle that breaks is in towing astern state.
S02: judging whether the clutch is in opening or sliding state of rubbing, if the clutch, which is in, opens or slide the shape that rubs
State then enters step S03；
Jerk management system receives clutch state, when clutch be it is sliding rub or opening state, and meet S01 simultaneously, be
There may be pass through operating condition when system judgement further accelerates.
S03: judging whether the gas pedal of the vehicle is in the state of stepping on, and steps on if the gas pedal of the vehicle is in
Lower state, then enter step S04；
It steps on the throttle pedal, the judgement of jerk management system has positive acceleration demand.
S04: it is pre- to judge whether the difference between the automatic transmission input shaft rotating speed and the engine speed is greater than
If value enters step S05 if the difference is greater than preset value.
Jerk management system is according to engine speed, engine speed variable gradient, transmission input shaft revolving speed, automatic change
Fast device gear information, which judges whether there is, passes through operating point.If transmission input shaft speed-engine revolving speed > δ (can be according to certainly
Dynamic transmission gear, the calibration of engine speed gradient), control is passed through into S05 torque.A/T gear position is lower, starts
Machine revolving speed gradient is bigger, pass through impact it is more serious, need more early identify pass through operating condition, δ value calibration it is bigger.
If high tap position, which slides, steps on large throttle, automatic transmission power downshift can be triggered, the engine torque needs quick
Rise, system does not need identification and passes through operating point at this time.High tap position δ can be demarcated to maximum, impact function is passed through in shielding.δ value
Calibration can refer to table 1.
1 automatic transmission input shaft rotating speed of table and engine speed speed difference δ
If the difference between the automatic transmission input shaft rotating speed and the engine speed is less than or equal to preset value,
There is no operating point is passed through, the torque of the engine is controlled by operator demand.
S05: the torque for starting the engine passes through control process.
As shown in Fig. 2, the torque of the engine passes through control process and includes before passing through, crossing point, passes through three afterwards
Stage.The moment of torsion control of engine three phases passes through the gas circuit demand torque of engine respectively and fiery road demand torque is individually controlled
System.Wherein, gas circuit demand torque is base torque, is realized by control air throttle and booster；Fiery road demand torque is realized fast
Speed response is realized by the control angle of ignition.
Preceding moment of torsion control is passed through, the torque of engine presses operator demand's rapid increase.
As shown in the T1-T2 moment in attached drawing 2, engine speed < transmission input shaft revolving speed-δ at this time, engine air passage
Demand torque step one value (engine torque loss) afterwards (can be according to gas pedal, A/T gear position by certain slope K
Calibration) operator demand's torque is risen to, calibration value can refer to table 2.
Fiery road demand torque, which does not filter, rises to operator demand's torque, and the angle of ignition uses basic ignition angle.Engine turns
Fast rapid increase is close at speed difference δ.
2 gas circuit torque rate of rise K (Nm/s) of table
A moment of torsion control is passed through, the engine actively turn round by drop, and the engine speed passes through the transmission input shaft
Revolving speed.
As shown in the T2 moment in attached drawing 2, engine speed=transmission input shaft revolving speed-δ at this time, the moment engine air
Road demand torque maintains operator demand's torque, and fiery road demand torque is made to start by operator demand's torque by pushing away the angle of ignition
Machine torque is quickly down to Y (can demarcate according to A/T gear position, operator demand's torque).Y value is limited by minimum ignition angle,
It cannot be too small.It can also be by demarcating maximum, shielding drop is turned round.Calibration value can refer to table 3.
Table 3 passes through an engine torque Y
Rear moment of torsion control is passed through, the torque of the engine restores to operator demand's torque.
As shown in the T2-T3 moment in attached drawing 2, engine speed > speed changer revolving speed-δ, engine air passage demand are turned round at this time
Square maintains operator demand's torque, and fiery road demand torque is using Y as starting point, and by controlling the angle of ignition, engine torque is pressed one
Rank low-pass filtering is restored to operator demand's torque, and filtering time t can be demarcated according to gear, operator demand's torque, and value is got over
Greatly, torque rises slower, otherwise faster, and calibration value can refer to table 4.
4 torque of table restores filtering time t
S06: torque passes through control and completes, and the torque of the engine is controlled by operator demand.
As shown in the T3-T4 moment in attached drawing 2, engine air passage demand torque and fiery road demand torque press operator demand
Moment of torsion control.
A kind of jerk management method of the power transmission system of vehicle of the present embodiment, first according to engine operating state, from
Whether vehicle described in dynamic transmission gear, accelerator pedal position comprehensive descision is in towing astern state, if being in towing astern state, sentences
Whether the clutch that breaks is in opening or sliding state of rubbing judges whether if the clutch, which is in, opens or slide state of rubbing
Pedal of stepping on the throttle is sentenced if the gas pedal is stepped on according to engine speed and automatic transmission input shaft rotating speed difference
Disconnected whether activate passes through control.Into after passing through control, the process of will be travelling through is divided into pass through before, pass through point, pass through after three differences
Stage, each stage differently control engine torque, not only meet dynamic response, but also reduce and pass through impact, improve
Vehicle driving.
Embodiment two
Second embodiment of the present invention provides a kind of jerk management system of powertrain, the jerk management system includes:
Towing astern condition judgment module: it for judging whether vehicle is towing astern state, is touched when the vehicle is towing astern state
Send out clutch state judgment module.The judgment mode of the towing astern condition judgment module are as follows: judge the engine whether in oil
Door pedal is run in the state of lifting, if the engine is run in the state that gas pedal is lifted, the towing astern state is sentenced
Disconnected module triggers the clutch state judgment module.Optionally, the judgment mode of the towing astern condition judgment module are as follows: judgement
Whether the revolving speed of the engine is less than automatic transmission input shaft rotating speed, if the revolving speed of the engine is less than automatic transmission
Input shaft rotating speed, the towing astern condition judgment module trigger the clutch state judgment module.
Clutch state judgment module: for judging whether the clutch is in opening or sliding state of rubbing, when it is described from
Clutch, which is in open or slide, triggers accelerator pedal position judgment module when rubbing state；
Accelerator pedal position judgment module: for judging whether the gas pedal of the vehicle is in the state of stepping on, work as institute
The gas pedal for stating vehicle is in triggering when stepping on state and passes through operating condition judgment module；
Pass through operating condition judgment module: for judging between the automatic transmission input shaft rotating speed and the engine speed
Difference whether be greater than preset value, when the difference be greater than preset value when triggering engine torque pass through control module；When described
When difference between automatic transmission input shaft rotating speed and the engine speed is less than or equal to preset value, the torsion of the engine
Square is controlled by operator demand.
Engine torque passes through control module: the torque for the engine passes through control.The engine torque control
Molding block includes: to pass through preceding moment of torsion control submodule, and the torque for controlling engine rapidly increases to operator demand's torque；
A moment of torsion control submodule is passed through, actively drop is turned round for controlling engine, and the engine speed passes through the speed changer input
Axis revolving speed；Rear moment of torsion control submodule is passed through, the torque for controlling engine restores to operator demand's torque.Preferably,
It is described pass through before moment of torsion control submodule include gas circuit moment of torsion control unit, the gas circuit moment of torsion control unit starts for controlling
Operator demand's torque is risen to by certain slope K after one value of machine torque step；Passing through a moment of torsion control submodule includes fire
Road moment of torsion control unit, the fire road moment of torsion control unit are quickly down to Y for controlling engine torque；Pass through rear moment of torsion control
Submodule includes fiery road moment of torsion control unit, and the fire road moment of torsion control unit is for controlling engine torque by first-order low-pass
The fast quick-recovery of wave is to operator demand's torque.
The jerk management system of the present embodiment, can execute method described in embodiment one, realization principle and embodiment
One is similar, and details are not described herein again.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of jerk management system of power transmission system of vehicle, the powertrain include engine, fluid torque-converter and
Automatic transmission, the automatic transmission are connected with the engine by fluid torque-converter, the fluid torque-converter include from
Clutch, which is characterized in that the jerk management system includes:
Towing astern condition judgment module: it for judging whether the vehicle is towing astern state, is touched when the vehicle is towing astern state
Send out clutch state judgment module；
Clutch state judgment module: for judging whether the clutch is in opening or sliding state of rubbing, when the clutch
Accelerator pedal position judgment module is triggered in opening or when sliding and rubbing state；
Accelerator pedal position judgment module: for judging whether the gas pedal of the vehicle is in the state of stepping on, when the vehicle
Gas pedal be in triggering when stepping on state and pass through operating condition judgment module；
Pass through operating condition judgment module: for judging the difference between the automatic transmission input shaft rotating speed and the engine speed
Whether value is greater than preset value, and when the difference is greater than preset value, triggering engine torque passes through control module；
Engine torque passes through control module: the torque for the engine passes through control.
2. a kind of jerk management system according to claim 1, which is characterized in that the engine torque passes through control mould
Block includes:
Moment of torsion control submodule, the torque for controlling engine rapidly increase to operator demand's torque before passing through；
A moment of torsion control submodule is passed through, actively drop is turned round for controlling engine, and the engine speed passes through the speed changer
Input shaft rotating speed；
Rear moment of torsion control submodule is passed through, the torque for controlling engine restores to operator demand's torque.
3. a kind of jerk management system according to claim 2, which is characterized in that
It is described pass through before moment of torsion control submodule include gas circuit moment of torsion control unit, the gas circuit moment of torsion control unit is for controlling
Operator demand's torque is risen to by certain slope K after one value of engine torque step；
Passing through a moment of torsion control submodule includes fiery road moment of torsion control unit, and the fire road moment of torsion control unit starts for controlling
Machine torque is quickly down to Y；
Passing through rear moment of torsion control submodule includes fiery road moment of torsion control unit, and the fire road moment of torsion control unit starts for controlling
Machine torque is by the fast quick-recovery of first-order low-pass wave to operator demand's torque.
4. a kind of jerk management system according to claim 1, which is characterized in that the towing astern condition judgment module is sentenced
Disconnected mode are as follows: judge whether the engine runs in the state of not fuel feeding, if the engine is in the state of not fuel feeding
Operation, the towing astern condition judgment module trigger the clutch state judgment module；Or judge that the revolving speed of the engine is
It is no be less than automatic transmission input shaft rotating speed, if the revolving speed of the engine be less than automatic transmission input shaft rotating speed, it is described fall
Condition judgment module is dragged to trigger the clutch state judgment module.
5. a kind of jerk management method of power transmission system of vehicle, which is characterized in that the described method comprises the following steps:
Judge whether the vehicle is towing astern state, if the vehicle is towing astern state, enters clutch state judgment step；
Judge whether the clutch is in opening or sliding state of rubbing, if the clutch, which is in, opens or slides state of rubbing, into
Enter accelerator pedal position judgment step；
Judge whether the gas pedal of the vehicle is in the state of stepping on, if the gas pedal of the vehicle, which is in, steps on state,
Then enter and passes through operating condition judgment step；
Judge whether the difference between the automatic transmission input shaft rotating speed and the engine speed is greater than preset value, if institute
Difference is stated greater than preset value, then enters engine torque and passes through rate-determining steps；
The torque for starting the engine passes through control process.
6. a kind of jerk management method of power transmission system of vehicle according to claim 5, which is characterized in that described to start
The torque of machine passes through control process
Preceding moment of torsion control is passed through, the torque of engine rapidly increases to operator demand's torque；
A moment of torsion control is passed through, the engine actively turn round by drop, and the engine speed passes through the transmission input shaft revolving speed；
Rear moment of torsion control is passed through, the torque of the engine restores to operator demand's torque.
7. a kind of jerk management method of power transmission system of vehicle according to claim 6, which is characterized in that pass through control
Gas circuit demand torque realizes that the torque of the engine passes through preceding control process, by controlling fiery road demand torque to realize
The torque for stating engine passes through a little and passes through rear control process.
8. a kind of jerk management method of power transmission system of vehicle according to claim 5, which is characterized in that if it is described from
Difference between dynamic transmission input shaft revolving speed and the engine speed is less than or equal to preset value, then the torque of the engine
It is controlled by operator demand.
9. a kind of jerk management method of power transmission system of vehicle according to claim 5 or 8, which is characterized in that described
The revolving speed gradient of gear and the engine of the preset value based on the automatic transmission, which is demarcated, to be obtained.
10. a kind of jerk management method of power transmission system of vehicle according to claim 5, which is characterized in that judge institute
State vehicle whether be towing astern state mode are as follows: judge whether the engine runs in the state of not fuel feeding, if the hair
Motivation is run in the state of not fuel feeding, then the vehicle is in towing astern state；Or judge whether the revolving speed of the engine is small
In automatic transmission input shaft rotating speed, if the revolving speed of the engine is less than automatic transmission input shaft rotating speed, the vehicle
In towing astern state.
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| CN201910068531.7A CN109611546B (en) | 2019-01-24 | 2019-01-24 | Impact management system and method for vehicle power transmission system |
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| CN201910068531.7A CN109611546B (en) | 2019-01-24 | 2019-01-24 | Impact management system and method for vehicle power transmission system |
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| CN113978442A (en) * | 2021-10-30 | 2022-01-28 | 蜂巢传动科技河北有限公司 | Vehicle control method, unit, vehicle control system and vehicle |
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| CN113464642A (en) * | 2021-06-30 | 2021-10-01 | 中国第一汽车股份有限公司 | Method, device, terminal and storage medium for improving vehicle acceleration smoothness |
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