CN108518475B - Electronic pump is used for the control method and system of temperature of transmission protection - Google Patents
Electronic pump is used for the control method and system of temperature of transmission protection Download PDFInfo
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- CN108518475B CN108518475B CN201810307537.0A CN201810307537A CN108518475B CN 108518475 B CN108518475 B CN 108518475B CN 201810307537 A CN201810307537 A CN 201810307537A CN 108518475 B CN108518475 B CN 108518475B
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The present invention discloses a kind of control method and system that electronic pump is protected for temperature of transmission; judgment step, temperature of transmission field detecting step, electronic pump high efficient district judgment step are calculated by clutch heating power; for the selection best opportunity after friction plate fever is dropped to rapidly friction plate temperature before friction plate work; strive before driver's move vehicle each time; all temperature of transmission is controlled to original state; to allow speed changer that can cope with repeated multiple times starting calmly, solve the problems, such as that the speed changer under urban congestion working condition is cooling.
Description
Technical field
The present invention relates to automatic transmission technical fields, are used for speed changer more particularly to electronic pump in a kind of multiple pump
The control method and system of temperature protection.
Background technique
In hydraulic-driven automatic transmission, the use of oil pump be it is essential, oil pump to hydraulic control unit provide company
Continue the flow under stable rated pressure, to meet hydraulic control demand.On the market, due to the requirement to speed changer economy
Increasingly harsh, multiple pump has become trend.In previous Single Mechanical pump hydraulic pressure scheme, due to mechanical pump revolving speed directly by
To the restriction of engine speed, when engine operation is when that can make mechanical revolution speed far more than speed changer greatest requirements flow, function
Rate, which will appear, significantly to be wasted.Therefore in more pump schemes, an electronic pump can be at least set to carry out non-polarized adjusting.
The cooling efficiency of speed changer is always the problem for perplexing industry, common processing mode be the request amount that will cool down just
Than the value of the heating power in clutch, the core views of this method are to fight heating power with cooling flow, and what is considered is
Heat is taken out of when clutch friction plate generates heat as quickly as possible, when heating power is greater than cooling power, from
Temperature rise inside clutch is rapid, if driver then brakes into low engine speed area, mechanical pump efficiency is with engine speed
Decline together, generation flow is low, can not promptly lower heat take out of, driver can not effectively cool down clutch start to walk next time before
Device.
Summary of the invention
The object of the present invention is to provide the control methods that electronic pump in a kind of multiple pump is used for temperature of transmission protection
And system.
To achieve the above object, the present invention provides following schemes:
A kind of electronic pump is used for the control method of temperature of transmission protection, comprising:
Step S1, signal acquisition and torque arithmetic step, gearbox controller obtain driver's input signal, engine ginseng
Examine speed changer own signal under signal, current state；The torque T that clutch under current state passed+be delivered to wheel is calculated, it should
Torque is for meeting tractive force needed for wheel；
Step S2, clutch heating power calculates judgment step, the torque T and current state obtained by the step S1
Clutch heating power P under current state is calculated in the rotational speed difference of lower clutch drive end and driven end, by the current shape
Clutch heating power P is needed compared with the limitation of forced feed lubrication heating power with the minimum of clutch friction plate under state；
Forced feed lubrication heating power is needed to limit if clutch heating power reaches the minimum of clutch friction plate under current state
When processed, step S4 is executed；If under current state clutch heating power be not up to it is minimum need forced feed lubrication heating power limit when,
Execute step S8；
Step S3, temperature of transmission field detecting step, gearbox controller obtain clutch and input oil temperature sensor temperature
Oil temperature tactility apparatus temperature is exported with clutch, temperature of transmission field under current state is calculated, by speed changer under current state
Cooling hydraulic oil target flow needed for temperature field is compared with the cooling hydraulic oil actual flow that mechanical pump can be generated；
If the cooling hydraulic oil actual flow that mechanical pump can be generated is less than what temperature of transmission place under current state needed
Cooling hydraulic oil target flow, executes step S4；If the cooling hydraulic oil actual flow that mechanical pump can be generated is greater than current shape
The cooling hydraulic oil target flow that temperature of transmission place needs under state executes step S8；
Step S4, electronic pump high efficient district judgment step, gearbox controller determine need according to the torque T that step S1 is obtained
The speed changer working connection pressure P to be maintainedLINE, so that the working connection pressure PLINEFor when clutch transmission torque
So that clutch system can at least stablize the target main oil pressure P needed for the speed changertargetOn, if target main oil pressure
PtargetLess than the maximum pressure of electronic pump high efficiency range, gearbox controller assert that the oil pressure of current variator working connection is in
The low-pressure high efficient district of electronic pump；
Step S5, whether electronic pump works judgment step, judges whether electronic pump works, if it is not, thening follow the steps S7, opening
Dynamic electronic pump cools down the speed changer；
Step S6, electronic pump counter counting step, counter continuously count the opening time of motor, when reaching
When specified duration, gearbox controller thens follow the steps S8, releases electronics pump work, to protect electronic pump.
Preferably, in the step S1, driver's input signal includes: gas pedal value, brake pedal value, shift
Handle position；The engine reference signal includes: engine torque, actual engine speed；The speed changer own signal
Including, input shaft rotating speed, output shaft revolving speed, oil temperature.
Preferably, the step S1 exists always under engine and transmission duty state.
Preferably, in the step S2, using formula: P=T* (n_engine-n_clutch), wherein P is clutch
Heating power, T are the torque that clutch works as front transfer, and (n_engine-n_clutch) is that the revolving speed of clutch drive end subtracts
The rotational speed difference of clutch driven end.
Preferably, the step S2 and step S3 be cosequence, can first can after.
Preferably, in the step S4, the low pressure zone, which refers to, slides in gear, will stop, waiting for parking, starting initial stage
Electronic pump pressure area.
Preferably, in the step S4, " gearbox controller is determined according to the torque T that step S1 is obtained to be needed to maintain
Speed changer working connection pressure PLINE" the step of include pass through formula PLINE=PCLUTCH+C,PCLUTCH=T*K is calculated and is obtained, wherein
K is torque gain coefficient, and C is constant, PCLUTCHFor clutch pressure.
Preferably, in the step S6, a minimum operating time is arranged in the electronic pump, avoids the short wink work of electronic pump
Make, if cooling target reaches and the electronics pump work must reach the minimum operating time, just allows to close.
Present invention further teaches the control systems that a kind of electronic pump is used for temperature of transmission protection, comprising:
Signal acquisition and torque arithmetic unit obtain driver's input signal, engine reference for gearbox controller
Speed changer own signal under signal, current state；The torque T that clutch under current state is transmitted to wheel is calculated, the torsion
Square is for meeting tractive force needed for wheel；
Clutch heating power calculates judging unit, the torque T for obtaining by signal acquisition and torque arithmetic unit
And clutch heating power P under current state is calculated in the rotational speed difference of clutch drive end and driven end under current state, it will
Under the current state clutch heating power P with clutch friction plate it is minimum need forced feed lubrication heating power limit compared with
Compared with；
Temperature of transmission field detecting unit, for gearbox controller obtain clutch input oil temperature sensor temperature with from
Clutch exports oil temperature tactility apparatus temperature, temperature of transmission field under current state is calculated, by temperature of transmission under current state
The cooling hydraulic oil target flow that place needs is compared with the cooling hydraulic oil actual flow that mechanical pump can be generated；
Electronic pump high efficient district judging unit determines the speed changer that needs maintain according to torque T for gearbox controller
Working connection pressure PLINE, so that the working connection pressure PLINEFor making clutch system when clutch transmission torque
The target main oil pressure P needed for the speed changer can at least be stablizedtargetOn, if target main oil pressure PtargetLess than electronic pump height
The maximum pressure in section is imitated, the low-pressure that the oil pressure of gearbox controller identification current variator working connection is in electronic pump is efficient
Area；
Whether electronic pump works judging unit, for judging whether electronic pump works, if it is not, then executing following steps: opening
Dynamic electronic pump cools down the speed changer；
Electronic pump counter counts counting unit continuously counts the opening time of motor for counter, when reaching volume
When periodically long, gearbox controller then releases electronics pump work, to protect electronic pump.
The beneficial effects are mainly reflected as follows:
1, dynamic control compared with prior art, the present invention are chosen the right moment and will rub after clutch friction plate fever
Piece temperature drops to rapidly before friction plate work, strives before driver's move vehicle each time, all by temperature of transmission control
Original state is made, to allow speed changer that can cope with repeated multiple times starting calmly, solves the change under urban congestion working condition
The cooling problem of fast device；
2, it is electronic pump high efficient district that cooling opportunity is chosen during realization of the invention, and electronics pump load at this time is small, easily
In realize rotating speed of target, electronic pump consume electric current it is small, the hydraulic structure that can be applicable in is relatively more, it can be useful in electronic pump with
Mechanical pump is total to the hydraulic system of pressure, and can be adapted for the system that electronic pump or cooling circuit are separately separated pipeline, for
Any system is without changing control method and structure.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is flow diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Present invention discloses a kind of control methods that temperature of transmission protection is carried out using electronic pump.It is well known that double
In pumping system, the control of electronic pump is often based upon the flow or operating condition of current system estimation, electron pump one target of setting
Revolving speed.Electronic pump is maintained or is fought due to being needed certain electric current in the case where reaching rotating speed of target by motor driven
Load torque.When hydraulic system is when electronic pump oil duct application pressure is higher, electronic pump will receive following influence:
1, the torque that electronic pump needs can be bigger；
2, the electric current of electronic pump consumption can be bigger；
3, it is easier so that rotating speed of target is not achieved in electronic pump and can be only sustained at slow-speed of revolution area, the pump efficiency in slow-speed of revolution area
Rate is worse, therefore electronic pump may work under the more severe operating condition of efficiency.
These weak tendencies of electronic pump are directly to drive because the motor of electronic pump is often limited power compared to engine
Dynamic mechanical pump, electronic pump need to consider that the power capability of motor, the present invention are directed to the weak tendency of electronic pump when control
It optimizes, the mode that system controls is decomposed into two parts, feature are as follows:
1, electronic pump is carried out in high pressure section and avoids control, in the case where the electronics efficiency of pump is severe, selectively closed
Close electronic pump；
2, excessive control is carried out to electronic pump in low pressure section, compensates the closing operating condition in high pressure section.
It is specific as shown in Figure 1,
A kind of electronic pump is used for the control method of temperature of transmission protection, comprising:
Step S1, signal acquisition and torque arithmetic step, gearbox controller obtain driver's input signal, engine ginseng
Examine speed changer own signal under signal, current state；The torque that clutch is currently transmitted to wheel is calculated, which is used for
Meet tractive force needed for wheel.The step S1 exists always under engine and transmission duty state.
Driver's input signal includes: gas pedal value, brake pedal value, shift handle position.The engine
Reference signal includes: engine torque, actual engine speed.The speed changer own signal includes input shaft rotating speed, output
Axis revolving speed, oil temperature.
Step S2, clutch heating power calculates judgment step, the torque T and current state obtained by the step S1
Clutch heating power P under current state is calculated in the rotational speed difference of lower clutch drive end and driven end, generates heat in general
Power and torque and rotational speed difference are all directly proportional.
Clutch heating power under the current state and the minimum of clutch friction plate are needed into forced feed lubrication heating power
Limitation compares.The condition is for judging whether system needs to start big flow forced feed lubrication, because hydraulic system is necessary at this time
Abundant cooling flow is provided.
Forced feed lubrication heating power is needed to limit if clutch heating power reaches the minimum of clutch friction plate under current state
When processed, step S4 is executed；If under current state clutch heating power be not up to it is minimum need forced feed lubrication heating power limit when,
Execute step S8.
In the step S2, it is calculated by using the following formula clutch heating power under current state: P=T* (n_
Engine-n_clutch), wherein P is clutch heating power, and T is the torque that clutch works as front transfer, (n_engine-n_
Clutch the rotational speed difference of clutch driven end) is subtracted for the revolving speed of clutch drive end.
Step S3, temperature of transmission field detecting step, gearbox controller obtain clutch and input oil temperature sensor temperature
Oil temperature sensor temperature is exported with clutch, temperature of transmission field under current state is calculated, by speed changer under current state
Cooling hydraulic oil target flow needed for temperature field is compared with the cooling hydraulic oil actual flow that mechanical pump can be generated.The temperature
Degree field indicates that the oil stream of certain mass crosses the degree being heated when the clutch of fever, embodies the violent of clutch inner heat
Degree.
If temperature of transmission field is severe under current state, i.e., the cooling hydraulic oil actual flow that mechanical pump can be generated is less than
The cooling hydraulic oil target flow that temperature of transmission place needs under current state, thens follow the steps S4；If speed change under current state
Device temperature field is not severe, i.e., the cooling hydraulic oil actual flow that mechanical pump can be generated is greater than temperature of transmission field under current state
Required cooling hydraulic oil target flow, thens follow the steps S8.
In the present invention, the step S2 and step S3 are cosequence, can first can after.
Step S4, electronic pump high efficient district judgment step, gearbox controller determine need according to the torque T that step S1 is obtained
The speed changer working connection pressure P to be maintainedLINE, so that the working connection pressure PLINEFor when clutch transmission torque
So that clutch system can at least stablize the target main oil pressure P needed for the speed changertargetOn." the transmission control
Device determines the speed changer working connection pressure P that needs maintain according to the torque T that step S1 is obtainedLINE" the step of include pass through public affairs
Formula PLINE=PCLUTCH+C,PCLUTCH=T*K is calculated and is obtained, and wherein K is torque gain coefficient, and C is constant, PCLUTCHFor clutch oil
Pressure.
If target main oil pressure PtargetLess than the maximum pressure of electronic pump high efficiency range, gearbox controller assert current become
The oil pressure of fast device working connection is in the low-pressure high efficient district of electronic pump.The low-pressure high efficient district refer to slide in gear, will stop,
The pressure area of parking waiting, the electronic pump at starting initial stage.
The strategy of current exploitation software is as follows:, can be electronics under the motor input rated power working condition of electronic pump
The maximum pressure that can be born simultaneously when revolution speed is promoted to revolving speed V.On this maximum pressure, motor is obtaining specified function
Revolving speed V can not be promoted in the case where rate.In general, oil pressure is higher, and the torque of electronics pump motor carrying is bigger, consumes electric current
Also more, need power also bigger.Motor, which is usually limited by nominal torque, can not unconditionally increase output power.Therefore main
After oil pressure rises, the maximum speed that motor can reach under its rated power can also decline.And the volumetric efficiency characteristic pumped is total
It is higher that be in middle high revolving speed be, excessively poor in pump low rotation speed area internal volume efficiency.That is can go out if main oil pressure is too high
A kind of existing situation, motor can only obtain very slow revolving speed, and very slow revolving speed can only export very micro flow.This when
Electronic pump enters a kind of state for wasting electricity and not exporting, it is therefore desirable to avoid.
Step S5, whether electronic pump works judgment step, judges whether electronic pump works, if it is not, thening follow the steps S7, opening
Dynamic electronic pump cools down the speed changer.
In the present invention, step S2, S3 judges whether to need electronic pump, and step S4 judges whether that electronic pump can be operated, step
Rapid S5 judges whether electronic pump leaves unused.If step S3, S4, S5 are set up, the method for the present invention can activate electronic pump immediately.Such as
Fruit is only that step S3, S4 is set up, and the invalid expression electronic pump of step S5 is working, and is because of the preceding work once requested
Make not complete also, this when, method of the invention may require that electronic pump works on down.
Step S6, electronic pump counter counting step, counter continuously count the opening time of motor, when reaching
When specified duration, gearbox controller thens follow the steps S8, releases electronics pump work, to protect electronic pump.The step
In S6, the electronic pump also sets up a minimum operating time, avoids the short wink work of electronic pump, if cooling target is reached and described
Electronics pump work must reach the minimum operating time, just allow to close.
Present invention further teaches the control systems that a kind of electronic pump is used for temperature of transmission protection, comprising:
Signal acquisition and torque arithmetic unit obtain driver's input signal, engine reference for gearbox controller
Speed changer own signal under signal, current state；The torque T that clutch under current state is transmitted to wheel is calculated, the torsion
Square is for meeting tractive force needed for wheel；
Clutch heating power calculates judging unit, the torque T for obtaining by signal acquisition and torque arithmetic unit
And clutch heating power P under current state is calculated in the rotational speed difference of clutch drive end and driven end under current state, it will
Under the current state clutch heating power P with clutch friction plate it is minimum need forced feed lubrication heating power limit compared with
Compared with；
Temperature of transmission field detecting unit, for gearbox controller obtain clutch input oil temperature sensor temperature with from
Clutch exports oil temperature tactility apparatus temperature, temperature of transmission field under current state is calculated, by temperature of transmission under current state
The cooling hydraulic oil target flow that place needs is compared with the cooling hydraulic oil actual flow that mechanical pump can be generated；
Electronic pump high efficient district judging unit determines the speed changer that needs maintain according to torque T for gearbox controller
Working connection pressure PLINE, so that the working connection pressure PLINEFor making clutch system when clutch transmission torque
The target main oil pressure P needed for the speed changer can at least be stablizedtargetOn, if target main oil pressure PtargetLess than electronic pump height
The maximum pressure in section is imitated, the low-pressure that the oil pressure of gearbox controller identification current variator working connection is in electronic pump is efficient
Area；
Whether electronic pump works judging unit, for judging whether electronic pump works, if it is not, then executing following steps: opening
Dynamic electronic pump cools down the speed changer；
Electronic pump counter counts counting unit continuously counts the opening time of motor for counter, when reaching volume
When periodically long, gearbox controller then releases electronics pump work, to protect electronic pump.
Core of the invention thought is during clutch fever and after fever, rapidly to slide its temperature drop
Before rubbing.The work requirements of electronic pump may be very short wink.When the duration that cooling requirement generation to cooling requirement meets may
It is very short.Electronic pump seizes system idle time and carries out excessive cooling.Driver before needing clutch slipping each time, from
Clutch temperature is returned to the level of first time, fundamentally solves repeated multiple times a large amount of use clutch bring heating loss's wind
Danger.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (9)
1. the control method that a kind of electronic pump is used for temperature of transmission protection characterized by comprising
Step S1, signal acquisition and torque arithmetic step, gearbox controller obtain driver's input signal, engine with reference to letter
Number, speed changer own signal under current state；The torque T that clutch under current state is transmitted to wheel is calculated, the torque
For meeting tractive force needed for wheel；
Step S2, clutch heating power calculates judgment step, under the torque T and current state that are obtained by the step S1 from
Clutch heating power P under current state is calculated in the rotational speed difference of clutch drive end and driven end, will be under the current state
Clutch heating power P is needed compared with the limitation of forced feed lubrication heating power with the minimum of clutch friction plate；
If under current state clutch heating power reach clutch friction plate it is minimum need forced feed lubrication heating power limit when,
Execute step S4；If under current state clutch heating power be not up to it is minimum need forced feed lubrication heating power limit when, execute
Step S8；
Step S3, temperature of transmission field detecting step, gearbox controller obtain clutch input oil temperature sensor temperature with from
Clutch exports oil temperature tactility apparatus temperature, temperature of transmission field under current state is calculated, by temperature of transmission under current state
The cooling hydraulic oil target flow that place needs is compared with the cooling hydraulic oil actual flow that mechanical pump can be generated；
If the cooling hydraulic oil actual flow that mechanical pump can be generated is less than the cooling that temperature of transmission place needs under current state
Hydraulic oil target flow executes step S4；If the cooling hydraulic oil actual flow that mechanical pump can be generated is greater than under current state
The cooling hydraulic oil target flow that temperature of transmission place needs executes step S8；
Step S4, electronic pump high efficient district judgment step, gearbox controller is determined according to the torque T that step S1 is obtained to be needed to tie up
The speed changer working connection pressure P heldLINE, so that the working connection pressure PLINEFor making when clutch transmission torque
Clutch system can at least stablize the target main oil pressure P needed for the speed changertargetOn, if target main oil pressure PtargetIt is small
In the maximum pressure of electronic pump high efficiency range, gearbox controller assert that the oil pressure of current variator working connection is in electronic pump
Low-pressure high efficient district；
Step S5, whether electronic pump works judgment step, judges whether electronic pump works, if it is not, thening follow the steps S7, starting electricity
Son pump cools down the speed changer；
Step S6, electronic pump counter counting step, counter continuously counts the opening time of motor, specified when reaching
When duration, gearbox controller thens follow the steps S8, releases electronics pump work, to protect electronic pump.
2. control method according to claim 1, which is characterized in that in the step S1, driver's input signal
It include: gas pedal value, brake pedal value, shift handle position；The engine reference signal includes: engine torque, hair
Motivation actual speed；The speed changer own signal includes input shaft rotating speed, output shaft revolving speed, oil temperature.
3. control method according to claim 1, which is characterized in that the step S1 is in engine and transmission duty shape
Exist always under state.
4. control method according to claim 1, which is characterized in that in the step S2, using formula: P=T* (n_
Engine-n_clutch), wherein P is clutch heating power, and T is the torque that clutch works as front transfer, (n_engine-n_
Clutch the rotational speed difference of clutch driven end) is subtracted for the revolving speed of clutch drive end.
5. control method according to claim 1, which is characterized in that the step S2 and step S3 is cosequence, can
First can after.
6. control method according to claim 1, which is characterized in that in the step S4, the low pressure zone, which refers to, to be kept off
It slides, will stop, wait for parking, the pressure area of the electronic pump at initial stage of starting to walk.
7. control method according to claim 1, which is characterized in that in the step S4, " gearbox controller is according to step
The torque T that rapid S1 is obtained determines speed changer working connection pressure P that needs maintainLINE" the step of include pass through formula PLINE=
PCLUTCH+C,PCLUTCH=T*K is calculated and is obtained, and wherein K is torque gain coefficient, and C is constant, PCLUTCHFor clutch pressure.
8. control method according to claim 1, which is characterized in that in the step S6, the electronic pump is arranged one
Minimum operating time avoids the work of electronic pump short wink, if cooling target reach and the electronics pump work must reach it is described most
Small operating time just allows to close.
9. the control system that a kind of electronic pump is used for temperature of transmission protection characterized by comprising
Signal acquisition and torque arithmetic unit, for gearbox controller obtain driver's input signal, engine reference signal,
Speed changer own signal under current state；The torque T that clutch under current state is transmitted to wheel is calculated, which is used for
Meet tractive force needed for wheel；
Clutch heating power calculates judging unit, the torque T for obtaining by the signal acquisition and torque arithmetic unit
And clutch heating power P under current state is calculated in the rotational speed difference of clutch drive end and driven end under current state, it will
Under the current state clutch heating power P with clutch friction plate it is minimum need forced feed lubrication heating power limit compared with
Compared with；
Temperature of transmission field detecting unit obtains clutch input oil temperature sensor temperature and clutch for gearbox controller
Oil temperature tactility apparatus temperature is exported, temperature of transmission field under current state is calculated, by temperature of transmission place under current state
The cooling hydraulic oil target flow needed is compared with the cooling hydraulic oil actual flow that mechanical pump can be generated；
Electronic pump high efficient district judging unit determines the main oil of speed changer that needs maintain according to torque T for gearbox controller
Road pressure PLINE, so that the working connection pressure PLINEFor making clutch system at least when clutch transmission torque
The target main oil pressure P needed for the speed changer can be stablizedtargetOn, if target main oil pressure PtargetLess than electronic pump high efficient district
Between maximum pressure, gearbox controller assert that the oil pressure of current variator working connection is in the low-pressure high efficient district of electronic pump；
Whether electronic pump works judging unit, for judging whether electronic pump works, if it is not, then executing following steps: starting electricity
Son pump cools down the speed changer；
Electronic pump counter counts counting unit continuously counts the opening time of motor for counter, when reaching specified
When long, gearbox controller then releases electronics pump work, to protect electronic pump.
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| CN201810307537.0A CN108518475B (en) | 2018-04-08 | 2018-04-08 | Electronic pump is used for the control method and system of temperature of transmission protection |
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| CN201810307537.0A CN108518475B (en) | 2018-04-08 | 2018-04-08 | Electronic pump is used for the control method and system of temperature of transmission protection |
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| CN110206828B (en) * | 2019-05-23 | 2021-01-15 | 中国第一汽车股份有限公司 | Hybrid power car clutch flow coordination control method and system |
| CN110705138B (en) * | 2019-08-23 | 2022-06-28 | 中国第一汽车股份有限公司 | Speed changer thermal model modeling method |
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| JPH094431A (en) * | 1995-06-21 | 1997-01-07 | Honda Motor Co Ltd | Lubricating oil heating device for electric vehicle |
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| US8216112B2 (en) * | 2009-08-13 | 2012-07-10 | Ford Global Technologies, Llc | Methods and systems for assisted direct start control |
| JP2011174579A (en) * | 2010-02-25 | 2011-09-08 | Jatco Ltd | Oil-temperature correction device for automatic transmission |
| CN104315125B (en) * | 2014-08-29 | 2017-02-08 | 长城汽车股份有限公司 | Oil temperature control method and system for speed changer |
| CN205639582U (en) * | 2016-04-29 | 2016-10-12 | 重庆长安汽车股份有限公司 | Double -clutch gearbox's oil feeding system |
| CN206608537U (en) * | 2017-03-07 | 2017-11-03 | 浙江众孚动力研发有限公司 | Double pump system for double clutch gearboxes |
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