CN108146422A - Control method, device and the automobile of clutch - Google Patents
Control method, device and the automobile of clutch Download PDFInfo
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- CN108146422A CN108146422A CN201611109436.XA CN201611109436A CN108146422A CN 108146422 A CN108146422 A CN 108146422A CN 201611109436 A CN201611109436 A CN 201611109436A CN 108146422 A CN108146422 A CN 108146422A
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- Prior art keywords
- clutch
- upper limit
- output torque
- value
- limit value
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0043—Signal treatments, identification of variables or parameters, parameter estimation or state estimation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/02—Clutches
- B60W2510/0291—Clutch temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
Abstract
A kind of control method of clutch, device and automobile, the method includes：When the clutch is closed, accumulation calculating is carried out to the calorie value that the clutch generates；If the calorie value that accumulation calculating obtains is more than or equal to design heat amount threshold value, the output torque upper limit value of the power source is controlled to reduce on the basis of current output torque upper limit value.The present invention program can be when because of overheat of skidding not serious failure occurs for clutch, and realization continues as vehicle energy supply, and can reduce the probability that clutch is seriously worn, and carrying out safety operation for user provides buffer time.
Description
Technical field
The present invention relates to the transmission system control field of automobile, especially a kind of control method of clutch, device and vapour
Vehicle.
Background technology
With the development of automobile industry, the power performance of automobile increasingly improves, to the output torque and torque of power source
Response speed proposes higher requirement.
Important component of the clutch as the transmission system of automobile, it is defeated to speed changer for transmitting or cutting off power source
The torque gone out.Specifically, the power source can include engine or motor, when power source contacts combination with clutch
When, by the cunning effect of rubbing between the active part and secondary part of clutch, the torque that clutch is spread out of can be made gradually to connect
The output torque of power source is bordering on, the input shaft rotating speed of clutch also correspondingly moves closer to the output rotating speed in power source,
So that automobile balance ground acceleration and deceleration.
Further, when the difference in torque and larger speed discrepancy between the power source of automobile and clutch, clutch meeting
Slipping phenomenon occurs.Specifically, shift hunting is for example combined when clutch large torque drives or occurred suddenly in automobile
When or in automobile emergency brake, wheel drastically reduction of speed suddenly, and the transmission system being connected with power source is rotated due to existing
Inertia still keeps original rotating speed, the inertia torque much larger than power source torque is often generated in transmission system, in such cases
It is easy to cause the part of transmission system to be damaged.Turn since clutch is transmitted by the frictional force of contact surface between master and slave turntable
Square when transmission system internal load is more than the torque that clutch disc frictional force can be transmitted, causes between power source and clutch
Difference in torque and speed discrepancy generate, the master and slave part of clutch will generate heat because skidding, and reduce the torsion pass of clutch
Ability also results in clutch disc and wear out failure occurs.
In existing automatic gear-box, such as automatic mechanical transmission (Auto-matic Transmission,
AMT) or double-clutch automatic gearbox (Dual Clutch Transmission, DCT), mostly using position sensor or pressure
Sensor ensures the torque transmission capacity of clutch, and the heat to be accumulated during slipping of clutch overheat formulates heat threshold, so as to
The slippage problems of clutch provide foundation in order to control, and heat threshold is formulated by simulation for example, by using ripe thermal model.Wherein,
Torque transmission capacity is used to show the maximum input torque that clutch can be transmitted normally.
In electrically driven speed change case, due to increasing powershift between power source, there are the interventions of motor, and torque responsive is more
Soon, and than general orthodox car torque bigger, higher is required to the torque transmission capacity of clutch.Therefore electrically driven speed change case
The diagnosis of slipping of clutch is particularly significant, and clutch whether failure effect vehicle function realize and power output.
In the prior art, when the heat accumulated on the clutch exceeds heat threshold, the technical solution of use is usual
For direct cut-off clutch, so as to cut off the torque that power source is exported to speed changer.But such scheme will cause vehicle to be dashed forward
Right unpowered output if in non-security section, easily causes dangerous.
Invention content
The technical problem to be solved by the present invention is to provide a kind of control method of clutch, device and automobiles, can be in clutch
When device is because of skidding overheat generation not serious failure, realization continues as vehicle energy supply, and it is serious to reduce clutch generation
The probability of abrasion carries out safety operation for user and provides buffer time.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of control method of clutch, the clutch with
Power source couples, and the described method comprises the following steps：When the clutch is closed, to the clutch generate calorie value into
Row accumulation calculating；If the calorie value that accumulation calculating obtains is more than or equal to design heat amount threshold value, the power source is controlled
Output torque upper limit value reduce on the basis of current output torque upper limit value.
Optionally, the calorie value progress accumulation calculating generated to the clutch includes：Calculate the clutch
The rotating speed difference of driving disc spacing pressing and driven disc；Calculate the driving disc spacing pressing of the clutch and the torque difference of the driven disc；When
The rotating speed difference be more than or equal to preset rotation speed difference threshold value, and the torque difference be more than or equal to predetermined torque difference threshold value when,
Accumulation calculating is carried out to the calorie value that the clutch generates.
Optionally, the control method of the clutch further includes：The output torque upper limit value of power source described in per secondary control
When reducing on the basis of current output torque upper limit value, the counting of accumulation calculating number increases once.
Optionally, the control method of the clutch further includes：The output torque upper limit value of power source described in per secondary control
After reducing on the basis of current output torque upper limit value, the calorie value that the accumulation calculating obtains is reset.
Optionally, the control method of the clutch further includes：When the counting of the accumulation calculating number reaches present count
During value, disconnect the clutch or open limping pattern.
Optionally, the control method of the clutch further includes：Reduce the output torque upper limit value of the power source every time
Afterwards, if the output torque of the power source drops below or equal to the output torque upper limit value, and the accumulation calculating
The obtained calorie value is less than the duration of the design heat amount threshold value when reaching preset duration, then the accumulation calculating
The counting of number is reduced once, until reducing to zero.
In order to solve the above technical problems, the embodiment of the present invention also provides a kind of control device of clutch, the clutch
It is coupled with power source, described device includes：Heat accumulation calculating module, suitable for when the clutch is closed, to the clutch
The calorie value that device generates carries out accumulation calculating；Torque management module is more than etc. suitable for working as the calorie value that accumulation calculating obtains
When design heat amount threshold value, then the output torque upper limit value of the power source is controlled on the basis of current output torque upper limit value
Reduce.
Optionally, the accumulation calculating module includes：First computational submodule, suitable for calculating the driving disc spacing pressing of the clutch
With the rotating speed difference of driven disc；Second computational submodule, suitable for calculating the driving disc spacing pressing of the clutch and the driven disc
Torque difference；First heat accumulation calculating submodule, suitable for working as the rotating speed difference more than or equal to preset rotation speed difference threshold value, and
And the torque difference be more than or equal to predetermined torque difference threshold value when, to the clutch generate calorie value carry out accumulation calculating.
Optionally, the control device of the clutch further includes：First counting module, suitable for power source described in every secondary control
Output torque upper limit value when reducing on the basis of current output torque upper limit value, the counting of accumulation calculating number increases by one
It is secondary.
Optionally, the control device of the clutch further includes：Dump block, suitable for the defeated of power source described in every secondary control
Go out upper torque limit value after reduction on the basis of current output torque upper limit value, reset the heat that the accumulation calculating obtains
Value.
Optionally, the control device of the clutch further includes：Clutch control module, suitable for working as the accumulation calculating time
When several countings reaches default value, disconnect the clutch or open limping pattern.
Optionally, the control device of the clutch further includes：Second counting module, suitable for reducing the power source every time
Output torque upper limit value after, if the output torque of the power source drops below or equal to the output torque upper limit value,
And when the duration that the calorie value that the accumulation calculating obtains is less than the design heat amount threshold value reaches preset duration,
Then the counting of the number of the accumulation calculating is reduced primary, until reducing to zero.
In order to solve the above technical problems, the embodiment of the present invention also provides a kind of automobile, the automobile includes above-mentioned clutch
The control device of device.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that：
The embodiment of the present invention carries out accumulation calculating when the clutch is closed, to the calorie value that the clutch generates；
If the calorie value that accumulation calculating obtains is more than or equal to design heat amount threshold value, in the output torque for controlling the power source
Limit value reduces on the basis of current output torque upper limit value.Using the embodiment of the present invention, can be overheated in clutch because skidding
Not serious failure occurs constantly, realization continues as vehicle energy supply, and can reduce the probability that clutch is seriously worn,
Safety operation is carried out for user, and buffer time is provided.
Further, using the embodiment of the present invention, the number that thermal accumlation can occur with clutch transfinite increases, from
The torque transmission capacity of clutch declines, when the maximum input torque that can normally transmit declines, by periodically reducing power source
Output torque upper limit value, with avoid to a greater degree occur slipping of clutch problem, reduce the abrasion frequency to clutch, into
And effectively clutch is protected.
Further, it after repeatedly reducing power source output torque, when the heat that accumulation calculating obtains still transfinites, adopts
With the embodiment of the present invention, with cut-off clutch or limping pattern can be opened to avoid clutch generation over-heating erosion, so as to protect
Other systems of clutch, other components of transmission system and vehicle.
Further, when using smaller power source output torque, when heat no longer transfinites within a certain period of time, i.e. clutch
Heat condition improved, using the embodiment of the present invention, the counting that can pass through the number for reducing accumulation calculating extends energy supply
Time provides more buffer time so as to carry out safety operation for user.
Description of the drawings
Fig. 1 is a kind of flow chart of the control method of clutch in the embodiment of the present invention；
Fig. 2 is the flow chart of the control method of another clutch in the embodiment of the present invention；
Fig. 3 is the flow chart of the control method of another clutch in the embodiment of the present invention；
Fig. 4 is a kind of structure diagram of the control device of clutch in the embodiment of the present invention；
Fig. 5 is the structural representation of the accumulation calculating module in a kind of control device of clutch in the embodiment of the present invention
Figure.
Specific embodiment
As previously mentioned, when the difference in torque and larger speed discrepancy between the power source and clutch of automobile, clutch meeting
Occur slipping phenomenon, once clutch disc occur slippage problems, easily generated in clutch and accumulate heat, so cause from
Clutch is worn.Since in automatic clutch, faster, this problem is more prominent for torque responsive.
But in the prior art, when the heat accumulated on the clutch exceeds heat threshold, the technical solution of use
Usually direct cut-off clutch so as to cut off the torque that power source is exported to speed changer, will cause vehicle unpowered defeated suddenly
Go out, if in non-security section, easily cause dangerous.
The present inventor pass through the study found that the above problem it is crucial that when the heat accumulated on clutch exceeds
Heat threshold, when slippage problems occur, the torque transmission capacity of clutch will reduce, once it is not intended that torque transmission capacity drops
Low, clutch fails immediately.
The embodiment of the present invention carries out accumulation calculating when the clutch is closed, to the calorie value that the clutch generates；
If the calorie value that accumulation calculating obtains is more than or equal to design heat amount threshold value, in the output torque for controlling the power source
Limit value reduces on the basis of current output torque upper limit value.Using the embodiment of the present invention, can be overheated in clutch because skidding
Not serious failure occurs constantly, realization continues as vehicle energy supply, and the upper limit value of the output torque by reducing power source,
To reduce the probability that clutch is seriously worn, carry out safety operation for user and buffer time is provided.
It is understandable for above-mentioned purpose, feature and advantageous effect of the invention is enable to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of invention is described in detail.
With reference to Fig. 1, Fig. 1 is a kind of flow chart of the control method of clutch in the embodiment of the present invention.The clutch
Control method can include step S101 to step S102.
Step S101：When the clutch is closed, accumulation calculating is carried out to the calorie value that the clutch generates.
Step S102：If the calorie value that accumulation calculating obtains be more than or equal to design heat amount threshold value, control described in
The output torque upper limit value of power source reduces on the basis of current output torque upper limit value.
In the specific implementation of step S101, after clutch closure, power source is energized via clutch to vehicle.Its
In, the clutch can be used in automatic gear-box, such as in automatic mechanical transmission or double-clutch automatic gearbox.
The power source can include engine and motor namely orthodox car and implementation of the present invention may be used in new-energy automobile
Example.
It is possible to further be sent out by the electronic control unit of automobile (Electronic Control Unit, ECU)
Disconnect or be closed clutch instruction, and by Vehicle Controller local area network (Controller Area Network,
CAN clutch disconnection or closure signal) are got in the form of vehicle body CAN signal.
In specific implementation, accumulation calculating is carried out to the calorie value that the clutch generates may comprise steps of：Meter
Calculate the driving disc spacing pressing of the clutch and the rotating speed difference of driven disc；Calculate the driving disc spacing pressing of the clutch and the driven disc
Torque difference；When the rotating speed difference is more than or equal to preset rotation speed difference threshold value, and the torque difference is more than or equal to default
During torque difference, accumulation calculating is carried out to the calorie value that the clutch generates.
In the calorie value that accumulation calculating clutch generates, the thermal accumlation that clutch in normal range (NR) should not be sent out
Inside.Specifically, the rotating speed difference usually between the driving disc spacing pressing and driven disc of clutch is smaller, and transmitted on clutch
Torque and the torque difference of power source request are also smaller, and heat and heat rate of rise that clutch is sent out can born
In normal range (NR).Therefore in embodiments of the present invention, the rotating speed difference and difference in torque of driving disc spacing pressing and driven disc to clutch
Value is detected, and detects that rotating speed difference is more than or equal to preset rotation speed difference threshold value, and torque difference is more than or equal to default
During difference in torque threshold value, accumulation calculating just is carried out to the calorie value that the clutch generates, and in other cases not to heat
Value carries out accumulation calculating.
Further, the rotating speed of the driving disc spacing pressing of clutch and driven disc can be according to the rotating speed of power source and turning for gearbox
Speed obtains, and the driving disc spacing pressing of clutch and the torque of driven disc can be obtained according to the torque of power source and the torque of gearbox.
Wherein, the rotating speed of power source and torque can in real time be measured by corresponding to the controller of the power source.Specifically
For, for orthodox car, the controller of the power source can include engine controller；For hybrid vehicle, institute
Engine controller and motor controller can be included by stating the controller of power source；For pure electric automobile, the power source
Controller can include motor controller.
The rotating speed and torque of gearbox can by gear box control unit (Transmission Control Unit,
TCU it) measures in real time.
Wherein, the preset rotation speed difference threshold value and predetermined torque difference threshold value can be according to practical vehicles and gearbox
Model carries out the torque transmission capacity experiment of slipping of clutch fever, and is demarcated.Further, the slipping of clutch generates heat
Existing conventional experiment setting may be used in torque transmission capacity experiment, and the present invention does not limit this.It is possible to further using normal
The heat Calculation formula of rule carries out accumulation calculating to the calorie value that the clutch generates, such as by applying on the clutch
Torque and the speed difference at clutch both ends calculate the calorie value for obtaining and generating on the clutch.
In the specific implementation of step S102, if the calorie value that accumulation calculating obtains is more than or equal to design heat amount threshold
Value, then control the output torque upper limit value of the power source to reduce on the basis of current output torque upper limit value.
Wherein, the yield limit of material of the limits value of design heat amount threshold value and clutch itself is related, need to be tied according to experiment
Fruit determines.Specifically, it can be tried by the rack for the metapyretic clutch torque transmission capacity that skids under clutch different rotating speeds
It tests and clutch material property, after rationally demarcating clutch calorific value allowed band and the heat rate of rise that can be born, according to
The method that calibration software is demarcated by real vehicle and the bench test is tested obtains the limits value of design heat amount threshold value.Further
Ground, the design heat amount threshold value should be less than the limits value of the design heat amount threshold value.
It should be pointed out that the design heat amount threshold value is higher, it is meant that after clutch adds up higher heat, just meeting
Reduce the output torque upper limit value of power source.If the setting of design heat amount threshold value is excessively high, it is possible to clutch occur and have occurred and that
The problem of skidding and wear, but not yet starting to control the output torque upper limit value of power source, causes the embodiment of the present invention that can not play
Prevention clutch thermal adds up excessive effect.If the setting of design heat amount threshold value is too low, it is possible to normally be accumulated in clutch
The output torque upper limit value of i.e. control power source reduces in the state of heat, and output is caused to be short of power, and influences to drive manipulation
Experience.
Further, when the calorie value is more than or equal to design heat amount threshold value, in the output torque that controls the power source
Limit value reduces on the basis of current output torque upper limit value, to reduce the output torque of vehicle, is produced on clutch so as to slow down
Raw accumulation of heat.Wherein, during current output torque upper limit value refers to that calorie value is accumulated to design heat amount threshold value, power
The output torque upper limit value that source uses.
Wherein, the limits value of upper torque limit value need to be determined according to result of the test.It specifically, can be by clutch not
With the bench test of metapyretic clutch torque transmission capacity and the clutch material property of skidding under rotating speed, clutch hair is rationally demarcated
After heat allowed band and the heat rate of rise that can be born, demarcated according to calibration software by real vehicle and the bench test is surveyed
The method of examination obtains the limits value of upper torque limit value after different skidding numbers namely increases with the counting of accumulation calculating number and subtract
It is small.Further, the setting value of the upper torque limit value should be less than the limits value of the upper torque limit value.
Using the embodiment of the present invention, the closure of clutch when the calorie value of clutch accumulation calculating transfinites, can be kept
State continues as vehicle energy supply to realize, and the upper limit value of the output torque by reducing power source, to reduce clutch hair
The probability of raw abrasion carries out safety operation for user and provides buffer time.
With reference to figure 2, Fig. 2 is the flow chart of the control method of another clutch in the embodiment of the present invention.It is described another
The control method of kind clutch can include step S201 to step S210.
Step S201：Clutch is closed.
Step S202：Calculate speed discrepancy and difference in torque.
Step S203：Judge whether that speed discrepancy is more than or equal to threshold value and difference in torque is more than or equal to threshold value, when judging result is
When being, step S204 can be performed；Conversely, it can then be continued to execute with return to step S202.
Step S204：Accumulation calculating calorie value.
In relation to step S201 to the execution of step S204, the description for referring to the step S101 to S102 in Fig. 1 is held
Row, details are not described herein again.
Step S205：Judge whether that the calorie value of accumulation calculating is more than or equal to design heat amount threshold value, when judging result is yes
When, step S206 can be performed；Conversely, it can then be continued to execute with return to step S204.
Step S206：Counting increases once.
In specific implementation, the output torque upper limit value of power source described in every secondary control is in current output torque upper limit value
On the basis of when reducing, the counting of accumulation calculating number increases primary.
Preferably, the counting of corresponding different accumulation calculating number, can set different output torque upper limit values therewith
Corresponding, the counting of accumulation calculating number is higher, and output torque upper limit value is set lower.When counting increase, control described dynamic
The output torque upper limit value in power source is changed into the corresponding output torque upper limit value of counting after increasing.Conversely, when counting reduction,
The output torque upper limit value of the power source is controlled to be changed into the corresponding output torque upper limit value of counting after reducing.It is appreciated that
, it is with the variation of output torque upper limit value, the output torque for accordingly adjusting the power source is defeated after transformation to be less than
Go out upper torque limit value.Using the embodiment of the present invention, the number that thermal accumlation can occur with clutch transfinites increases, in clutch
The torque transmission capacity of device declines, when the maximum input torque that can normally transmit declines, by periodically reducing power source
Output torque upper limit value to avoid that slipping of clutch problem occurs to a greater degree, reduces the abrasion frequency to clutch, and then
Effectively clutch is protected.
Step S207：Judge whether to count and reach default value, when judging result is when being, can perform step S208；
Conversely, it can then perform step S209.
Step S208：Cut-off clutch opens limping pattern.
In specific implementation, when the counting of accumulation calculating number is more, when having reached default value, it can determine whether clutch
Failure, and confirm and slipping of clutch failure has occurred.In order to protect other components of clutch and transmission system against damages,
Control clutch is disconnected or opened limping pattern (Limp Home Mode, LHM).
Specifically, it can be obtained by torque transmission capacity experiment after bench test, clutch material property and slipping of clutch
Effective use scope of clutch is obtained, helps to judge the failure conditions of clutch.Such as utilize engine bench test, foundation
The clutch used torque transmission capacity of itself, torque transmission capacity continues to decline after skidding repeatedly, and judgement is reduced to how many when torque transmission capacity
After can be considered clutch fail.And then the starting of the torque that can determine that clutch failure and output torque upper limit value can be utilized
The difference of output torque upper limit value before and after value and transformation determines the number for allowing to skid.
It is understood that the default value that can be set can be positive integer.
Further, the default value that can be set can be with changing the difference of front and rear output torque upper limit value with corresponding
Relationship.Specifically, when other conditions determine, when corresponding to counting plus one, the output torque upper limit value after transformation with it is current
Output torque upper limit value difference gets over hour, and the as torque transmission capacity of clutch more meticulously divide, can have been set at this time
Higher default value.When corresponding to count plus one, output torque upper limit value and current output torque upper limit value phase after transformation
When difference is bigger, the output torque that all will reduce power source to a greater degree is as adjusted every time, lower present count can be set
Value.
Further, if default value is excessively high, it is meant that the number for reducing the output torque upper limit value is more, unfavorable
It is protected in other components of clutch, transmission system and other systems of vehicle., whereas if default value mistake
It is low, cause the embodiment of the present invention can not play for user carry out that safety operation provides buffer time should be effective.As one
Non-limitative example, default value can be selected from 2 times to 4 times.
Limping pattern is opened, relative to cut-off clutch, the time of power output can be extended, the peace that enhancing user drives
Quan Xing.The limping pattern is when vehicle breaks down, and automatic gear-box inner components may be caused to damage or go out
During the relevant security risk of existing automatic transmission, pass through automatic gear-box control unit (Transmission Control
Unit, TCU) speed changer is controlled to enter guard mode.
Using the embodiment of the present invention, when using smaller power source output torque upper limit value, through one or many cumulative meters
When obtained heat still transfinites, can over-heating erosion be occurred to avoid it with cut-off clutch or unlatching limping pattern,
So as to protect clutch.
Step S209：The output torque upper limit value of the power source is controlled to subtract on the basis of current output torque upper limit value
It is small.
Execution in relation to step S209, the description for referring to the step S102 in Fig. 1 are performed, and details are not described herein again.
Step S210：Calorie value is reset.
In specific implementation, the output torque upper limit value of power source described in every secondary control is in current output torque upper limit value
On the basis of reduce after, reset the calorie value that the accumulation calculating obtains.To ensure what is accumulated on clutch is recalculated
It is more accurate during heat.
In relation to Fig. 2 shows more detailed contents of control method of another clutch please refer to and show previously for Fig. 1
The associated description of the control method of a kind of clutch gone out, details are not described herein again.
Using the embodiment of the present invention, the failure conditions of reaction clutch that can be multi-level, and pass through to reduce by different level and move
Power source output torque upper limit value to reduce output torque, so as to preferably protect clutch, transmission system other components and
Other systems of vehicle.
Fig. 3 is the flow chart of the control method of another clutch in the embodiment of the present invention.As shown in figure 3, another
The control method of clutch can include step S301 to step S317.
Step S301：Clutch is closed.
Step S302：Calculate speed discrepancy and difference in torque.
In relation to step S301 to the execution of step S302, the description for referring to the step S201 to S202 in Fig. 2 is held
Row, details are not described herein again.
Step S303：Start timing.
Step S304：Judge whether that speed discrepancy is more than or equal to threshold value, and difference in torque is more than or equal to threshold value, when judging result is
When being, step S306 can be performed；Conversely, it can then perform step S305.
Step S305：Heat accumulative is reset.
In specific implementation, after starting timing, only when the rotating speed difference between the driving disc spacing pressing of clutch and driven disc is big
In equal to the poor threshold value of preset rotation speed, and to be more than or equal to predetermined torque poor for the torque difference of clutch driving plate and the driven disc
During threshold value, the calorie value that accumulation calculating obtains is just effective.Conversely, it then needs to reset the heat that accumulation calculating obtains on the clutch
Magnitude.To ensure only to be more than or equal to preset rotation speed difference threshold value in rotating speed difference, and torque difference is poor more than or equal to predetermined torque
Start timing during threshold value.
Step S306：Accumulation calculating calorie value.
Step S307：Judge whether that the calorie value of accumulation calculating is more than or equal to design heat amount threshold value, when judging result is yes
When, step S308 can be performed；Conversely, it can then perform step S314.
Step S308：Counting increases once.
Step S309：Judge whether that the counting of accumulation calculating number reaches default value, it, can be with when judging result is when being
Perform step S310；Conversely, it can then perform step S311.
Step S310：Cut-off clutch opens limping pattern.
Step S311：The output torque upper limit value of the power source is controlled to subtract on the basis of current output torque upper limit value
It is small.
Step S312：Heat accumulative is reset.
In relation to step S306 to the execution of step S312, the description for referring to the step S204 to S210 in Fig. 2 is held
Row, details are not described herein again.
Step S313：Timing is reset.
In specific implementation, the output torque upper limit value of power source described in every secondary control is in current output torque upper limit value
On the basis of reduce after, reset time of timing, and return to step S301 is continued to execute, in the case of being closed in clutch, weight
It is new to calculate rotating speed difference and torque difference.
Step S314：Judge whether that the duration of timing reaches preset duration, when judging result is when being, can perform step
S315；Conversely, it can then be continued to execute with return to step S307.
Step S315：It counts and reduces once, until reducing to zero.
It in specific implementation, can when the calorie value of accumulation calculating is less than design heat amount threshold value, and the duration is longer
To judge that the heat generated on clutch passes through loss, it is difficult to slipping of clutch be caused even to fail, can be reduced by counting
Primary mode extends the usage time of clutch, and longer buffer time is provided so as to carry out safety operation for user.
It is understood that preset duration cannot set too short, too short, easily the heat that generates on the clutch is not yet
The counting that loss just reduces accumulation calculating number is completed, reducing the embodiment of the present invention reduces the probability that clutch is worn
Effect.Conversely, preset duration cannot set it is long, it is long, the counting of accumulation calculating number is easily made only to add and is not subtracted, Jin Er
Judge that clutch fails rapidly after reaching default value, reduce the embodiment of the present invention and provide buffering for user's progress safety operation
The effect of time.
It is possible to further be tested by torque transmission capacity after bench test, clutch material property and slipping of clutch,
Measure reduce the accumulative heat that how long the clutch last time can be skidded after a torque be dissipated to do not influence to transmit it is new
Torque limit, so as to set rational preset duration.
In another specific embodiment, the step of starting to start timing using different time points.Increase specifically, counting
Output torque upper limit value, the output torque after output torque of power source drops below or equal to the reduction will be reduced after adding
After upper limit value, timing is just carried out, and the calorie value that the accumulation calculating obtains is reached less than the duration of design heat amount threshold value
During to preset duration, then the counting of the number of the accumulation calculating is reduced primary, until reducing to zero.
Specifically, after each skidding metering, the output torque of power source starts to count after dropping to new output torque upper limit value
When, if threshold value is not achieved in heat accumulative always in preset duration, it may determine that the heat generated on clutch passes through loss, no
Slipping of clutch can be caused even to fail, primary mode can be reduced by counting, extend the usage time of clutch, so as to
Safety operation is carried out for user, and longer buffer time is provided.
Step S316：The output torque upper limit value of control power source increases on the basis of current output torque upper limit value.
In specific implementation, after the counting of accumulation calculating number reduces, can power be controlled according to the counting after reduction
The output torque upper limit value in source increases on the basis of current output torque upper limit value, to provide the output torque of bigger, enhancing
The driving experience of user.
Preferably, the counting of corresponding different accumulation calculating number, can set different output torque upper limit values therewith
Corresponding, the counting of accumulation calculating number is lower, and output torque upper limit value is set higher.When counting reduction, control described dynamic
The output torque upper limit value in power source is changed into the corresponding output torque upper limit value of counting after reducing.Conversely, when counting increase,
The output torque upper limit value of the power source is controlled to be changed into the corresponding output torque upper limit value of counting after increasing.It is appreciated that
, it is with the variation of output torque upper limit value, the output torque for accordingly adjusting the power source is defeated after transformation to be less than
Go out upper torque limit value.
Using the embodiment of the present invention, when using smaller power source output torque, the heat that accumulation calculating obtains again exists
When no longer transfiniting in certain time, i.e. the heat condition of clutch is improved, and can extend energy supply time, so as to for user into
Row safety operation provides more buffer time.
Step S317：Timing is reset.
In specific implementation, the output torque upper limit value of power source described in every secondary control is in current output torque upper limit value
On the basis of increase after, reset time of timing, and return to step S301 is continued to execute, in the case of being closed in clutch, weight
It is new to calculate rotating speed difference and torque difference.
More detailed contents of the control method of another clutch shown in related Fig. 3 are please referred to be shown previously for Fig. 1
A kind of control method of the clutch gone out with Fig. 2 shows another clutch control method associated description, herein no longer
It repeats.
Using the embodiment of the present invention, the situation of torque, Jin Er can not be transmitted to avoid the accidental skidding of clutch
Judge that clutch before failure, can really be driven vehicle by the torque transmission capacity of clutch reality.The embodiment of the present invention was both
Can be to avoid when clutch can transmit low torque, by cut-off clutch or opening limping pattern causes it that can not work,
Again can be to avoid when clutch can not transmit high torque when slippage problems occur, exporting high torque by power source makes clutch
Device persistently occurs slippage problems and can not drive vehicle.
With reference to Fig. 4, Fig. 4 is a kind of structure diagram of the control device of clutch in the embodiment of the present invention.It is described from
The control device of clutch can include heat accumulation calculating module 41, torque management module 42, the first counting module 43, reset mould
Block 44,45 and second counting module 46 of clutch control module.
Wherein, the heat accumulation calculating module 41 is suitable for when the clutch is closed, and the clutch is generated
Calorie value carries out accumulation calculating.The torque management module 42 is suitable for being more than or equal in advance when the calorie value that accumulation calculating obtains
If during heat threshold, then the output torque upper limit value of the power source is controlled to subtract on the basis of current output torque upper limit value
It is small.First counting module 43 is suitable for the output torque upper limit value of power source described in per secondary control in the current output torque upper limit
When reducing on the basis of value, the counting of accumulation calculating number increases once.The dump block 44 is suitable for moving described in per secondary control
After the output torque upper limit value in power source reduces on the basis of current output torque upper limit value, reset what the accumulation calculating obtained
The calorie value.The clutch control module 45 is suitable for when the counting of the accumulation calculating number reaches default value, breaks
Open the clutch.After second counting module 46 is suitable for the output torque upper limit value for reducing the power source every time, if
The output torque of the power source drops below or equal to the output torque upper limit value, and the institute that the accumulation calculating obtains
When stating calorie value and reaching preset duration less than duration of the design heat amount threshold value, then the meter of the number of the accumulation calculating
Number is reduced once, until reducing to zero.
Fig. 5 is the structural representation of the accumulation calculating module 41 in a kind of control device of clutch in the embodiment of the present invention
Figure.The accumulation calculating module 41 can tire out including the first computational submodule 411, the second computational submodule 412 and the first heat
Add computational submodule 413.Wherein, first computational submodule 411 is suitable for calculating the driving disc spacing pressing and driven disc of the clutch
Rotating speed difference.Second computational submodule 412 is suitable for calculating the driving disc spacing pressing of the clutch and the driven disc
Torque difference.The first heat accumulation calculating submodule 413 is suitable for being more than or equal to preset rotation speed difference threshold when the rotating speed difference
Value, and the torque difference be more than or equal to predetermined torque difference threshold value when, to the clutch generate calorie value add up
It calculates.
More detailed contents of control device about the clutch please refer to the control method previously for clutch
Associated description, details are not described herein again.
The embodiment of the present invention additionally provides a kind of automobile, and the automobile includes the control device of above-mentioned clutch, the vapour
Vehicle can perform the control method of above-mentioned clutch.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in computer readable storage medium, to store
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (13)
1. a kind of control method of clutch, which is characterized in that the clutch is coupled with power source, and the method includes following
Step：
When the clutch is closed, accumulation calculating is carried out to the calorie value that the clutch generates；
If the calorie value that accumulation calculating obtains is more than or equal to design heat amount threshold value, the output of the power source is controlled to turn round
Square upper limit value reduces on the basis of current output torque upper limit value.
2. the control method of clutch according to claim 1, which is characterized in that the heat generated to the clutch
Magnitude carries out accumulation calculating and includes：
Calculate the driving disc spacing pressing of the clutch and the rotating speed difference of driven disc；
Calculate the driving disc spacing pressing of the clutch and the torque difference of the driven disc；
When the rotating speed difference is more than or equal to preset rotation speed difference threshold value, and the torque difference is more than or equal to predetermined torque difference threshold
During value, accumulation calculating is carried out to the calorie value that the clutch generates.
3. the control method of clutch according to claim 1, which is characterized in that further include：Power described in per secondary control
When the output torque upper limit value in source reduces on the basis of current output torque upper limit value, the counting of accumulation calculating number increases by one
It is secondary.
4. the control method of clutch according to claim 3, which is characterized in that further include：Power described in per secondary control
After the output torque upper limit value in source reduces on the basis of current output torque upper limit value, the institute that the accumulation calculating obtains is reset
State calorie value.
5. the control method of clutch according to claim 3, which is characterized in that further include：
When the counting of the accumulation calculating number reaches default value, disconnect the clutch or open limping pattern.
6. the control method of clutch according to claim 3, which is characterized in that further include：
After the output torque upper limit value for reducing the power source every time, if the output torque of the power source deteriorates to less than
In the output torque upper limit value, and the calorie value that the accumulation calculating obtains is less than holding for the design heat amount threshold value
When the continuous time reaches preset duration, then the counting of the number of the accumulation calculating is reduced primary, until reducing to zero.
7. a kind of control device of clutch, which is characterized in that the clutch is coupled with power source, and described device includes：
Heat accumulation calculating module, suitable for when the clutch is closed, the calorie value generated to the clutch adds up
It calculates；
Torque management module when the calorie value suitable for being obtained when accumulation calculating is more than or equal to design heat amount threshold value, then controls
The output torque upper limit value of the power source reduces on the basis of current output torque upper limit value.
8. the control device of clutch according to claim 7, which is characterized in that the accumulation calculating module includes：
First computational submodule, suitable for calculating the rotating speed difference of the driving disc spacing pressing of the clutch and driven disc；
Second computational submodule, suitable for calculating the driving disc spacing pressing of the clutch and the torque difference of the driven disc；
First heat accumulation calculating submodule is more than or equal to preset rotation speed difference threshold value, and described suitable for working as the rotating speed difference
When torque difference is more than or equal to predetermined torque difference threshold value, accumulation calculating is carried out to the calorie value that the clutch generates.
9. the control device of clutch according to claim 7, which is characterized in that further include：
First counting module, suitable for power source described in every secondary control output torque upper limit value in current output torque upper limit value
On the basis of when reducing, the counting of accumulation calculating number increases primary.
10. the control device of clutch according to claim 9, which is characterized in that further include：
Dump block, suitable for power source described in every secondary control output torque upper limit value on the basis of current output torque upper limit value
After upper reduction, the calorie value that the accumulation calculating obtains is reset.
11. the control device of clutch according to claim 9, which is characterized in that further include：
Clutch control module, suitable for when the counting of the accumulation calculating number reaches default value, disconnecting the clutch
Or open limping pattern.
12. the control device of clutch according to claim 9, which is characterized in that further include：
Second counting module, after reducing the output torque upper limit value of the power source every time, if the power source is defeated
Go out torque and drop below or equal to the output torque upper limit value, and the calorie value that the accumulation calculating obtains is less than institute
When stating duration of design heat amount threshold value and reaching preset duration, then the counting of the number of the accumulation calculating is reduced primary, directly
To reducing to zero.
13. a kind of automobile, which is characterized in that include the control device of such as claim 7 to 12 any one of them clutch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611109436.XA CN108146422B (en) | 2016-12-02 | 2016-12-02 | Clutch control method and device and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611109436.XA CN108146422B (en) | 2016-12-02 | 2016-12-02 | Clutch control method and device and automobile |
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| CN108146422A true CN108146422A (en) | 2018-06-12 |
| CN108146422B CN108146422B (en) | 2020-04-28 |
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| CN111791869A (en) * | 2019-10-31 | 2020-10-20 | 长城汽车股份有限公司 | Intelligent four-wheel-drive control method and system and vehicle |
| CN112432787A (en) * | 2019-08-26 | 2021-03-02 | 上海汽车集团股份有限公司 | One-way clutch effectiveness determining method and device |
| CN112672909A (en) * | 2018-09-13 | 2021-04-16 | 沃尔沃卡车集团 | Operating a vehicle including a vehicle deceleration subsystem |
| CN114857261A (en) * | 2022-05-23 | 2022-08-05 | 东风汽车集团股份有限公司 | Automatic transmission gear shifting motor overcurrent protection method based on maximum heat |
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| CN111791869A (en) * | 2019-10-31 | 2020-10-20 | 长城汽车股份有限公司 | Intelligent four-wheel-drive control method and system and vehicle |
| CN111791869B (en) * | 2019-10-31 | 2021-10-08 | 长城汽车股份有限公司 | Intelligent four-wheel-drive control method and system and vehicle |
| CN114857261A (en) * | 2022-05-23 | 2022-08-05 | 东风汽车集团股份有限公司 | Automatic transmission gear shifting motor overcurrent protection method based on maximum heat |
| CN114857261B (en) * | 2022-05-23 | 2024-01-12 | 东风汽车集团股份有限公司 | Automatic transmission gear shifting motor overcurrent protection method based on maximum heat |
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