CN110985654A - Electric pump load control method for automatic gearbox - Google Patents
Electric pump load control method for automatic gearbox Download PDFInfo
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- CN110985654A CN110985654A CN201911372774.6A CN201911372774A CN110985654A CN 110985654 A CN110985654 A CN 110985654A CN 201911372774 A CN201911372774 A CN 201911372774A CN 110985654 A CN110985654 A CN 110985654A
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- Prior art keywords
- electric pump
- load
- current
- judging whether
- stop function
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Classifications
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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
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0446—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control the supply forming part of the transmission control unit, e.g. for automatic transmissions
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
- F16D25/14—Fluid pressure control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1208—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures with diagnostic check cycles; Monitoring of failures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1256—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected
- F16H2061/1288—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected the failing part is an actuator
Abstract
The invention discloses an electric pump load control method for an automatic gearbox, which comprises the steps of obtaining a target current of an electric pump by utilizing the oil temperature of the gearbox and the rotating speed of the electric pump, and feeding back the load condition of the output end of the electric pump through the actual current of the electric pump; judging whether the load of the output end of the electric pump is in a reasonable range, if the load exceeds the current fluctuation threshold range of a target or exceeds the maximum current value allowed by the electric pump; the electric pump is controlled to stop running, the whole vehicle is prohibited to start and stop, the load of the output port of the electric pump is judged through reasonable diagnosis logic, the electric pump is turned off in advance when the load is abnormal, the start and stop function is forbidden, and the electric pump and the gearbox are protected.
Description
Technical Field
The invention belongs to the technical field of automatic gearbox control, and particularly relates to an electric pump load control method for an automatic gearbox.
Background
AT present, the monitoring and control of an electric pump load of an AT (automatic transmission) are basically in a blank state, more faults are directly reported according to the fact that a feedback current exceeds a maximum current value, the start-stop function is forbidden, the common diagnosis strategy control of the electric pump load of the AT is shown in figure 1, TCU control software sends a step target electric pump rotating speed value, the actual current of an electric pump is gradually increased, the actual rotating speed of the electric pump is close to the target rotating speed, the TCU monitors the actual current, and if the actual current exceeds the current upper limit, the TCU controls the electric pump to stop.
In the process of implementing the invention, the inventor finds that the prior art has at least the following defects: the method still remains in unilateral diagnosis of whether the current of the electric pump exceeds the maximum current value, the actual load condition of an output port of the electric pump cannot be accurately reflected, when the load of the electric pump is too high, the electric pump is easy to operate under the condition of continuous high current, the service life of the electric pump is shortened, and even the electric pump is directly burnt; if the load of the output end of the electric pump is too low, the electric pump controls the current to be low, so that the oil pressure required by the clutch compression and lubrication flow of the transmission cannot be established, the gear shifting impact in the starting and stopping process is caused, and the gearbox is damaged.
Disclosure of Invention
The invention aims to solve the technical problem of providing an electric pump load control method for an automatic gearbox, which overcomes the defects of the existing control method, and by adopting the control method, the purposes of judging the load of an output port of the electric pump through reasonable diagnosis logic, turning off the electric pump in advance when the load is abnormal, disabling the start-stop function and protecting the electric pump and the gearbox are realized.
In order to solve the technical problems, the technical scheme of the invention is as follows: the method for controlling the load of the electric pump for the automatic gearbox is characterized by comprising the following steps of:
obtaining a target current of the electric pump by utilizing the oil temperature of the gearbox and the rotating speed of the electric pump, and then feeding back the load condition of the output end of the electric pump through the actual current of the electric pump;
judging whether the load of the output end of the electric pump is in a reasonable range, if the load exceeds the current fluctuation threshold range of a target or exceeds the maximum current value allowed by the electric pump;
and controlling the electric pump to stop rotating, and forbidding the whole vehicle to start and stop.
An optimization scheme comprises the following steps;
starting at step 101, waiting for an instruction for starting a start-stop function;
103, under the condition that the engine is stopped, the TCU controller sends a required target rotating speed of the electric pump;
104, after the actual rotating speed of the electric pump is kept stable, judging whether the actual current of the electric pump is larger than the maximum current limit value of the electric pump and continuing to use
Time, if yes, go to step 106, otherwise go to step 105;
105, judging whether the actual current of the electric pump is larger than the target current upper limit threshold of the electric pump and smaller than the maximum current limit value of the electric pump continuously
Time, if yes, go to step 108, otherwise go to step 107;
step 112, operating an electric pump, stopping the engine, normally operating a start-stop function, and then entering step 113;
and step 113, judging whether the start-stop function is finished, if so, entering step 102, otherwise, entering step 112.
In one of the optimization schemes, the method comprises the following steps of,
the time is generally set to be 1s-2s according to the matching requirements of different vehicle types.
In one of the optimization schemes, the method comprises the following steps of,
the time is generally set to be 2.5s-4s according to the matching requirements of different vehicle types.
In one of the optimization schemes, the method comprises the following steps of,
the time is generally set to be 2.5s-4s according to the matching requirements of different vehicle types.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages: the target current range of the electric pump is obtained by utilizing the oil temperature of the gearbox and the rotating speed of the electric pump, the load condition of the output end of the electric pump is fed back through the actual current of the electric pump, whether the load of the output end of the electric pump is in a reasonable range is judged, if the load exceeds the target current fluctuation threshold range or exceeds the maximum current value allowed by the electric pump, the electric pump is controlled to stop rotating, and the whole vehicle is prohibited to start and stop. The load of the output port of the electric pump is judged through reasonable diagnosis logic, the electric pump is closed in advance when the load is abnormal, the start-stop function is forbidden, and the electric pump and the gearbox are protected.
Drawings
FIG. 1 is a timing diagram of the present pump load diagnostic logic;
FIG. 2 is a timing diagram of diagnostic logic for an embodiment of the present invention in which the electrical pump load is too low;
FIG. 3 is a timing diagram of the diagnostic logic for an electric pump overload condition in an embodiment of the present invention;
FIG. 4 is a timing diagram of the electrical pump load diagnostic logic in an embodiment of the present invention;
fig. 5 is a flow chart of an electric pump load control method in an embodiment of the present invention.
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present invention, the embodiments of the present invention will be described with reference to the accompanying drawings, and it will be understood by those skilled in the art that the following should not be construed as limiting the scope of the present invention.
In the embodiment, as shown in fig. 2, 3, 4, and 5, an electric pump load control method for an automatic transmission obtains a target current range of an electric pump by using a transmission oil temperature and an electric pump rotation speed, and further feeds back a condition of an electric pump output end load through an actual electric pump current, determines whether the electric pump output end load is in a reasonable range, controls the electric pump to stop running if the target current fluctuation threshold range is exceeded or the maximum allowable electric pump current value is exceeded, and prohibits a start-stop function of a whole vehicle, specifically, includes the following steps;
starting at step 101, waiting for an instruction for starting a start-stop function;
103, under the condition that the engine is stopped, the TCU controller sends a required target rotating speed of the electric pump;
104, after the actual rotating speed of the electric pump is kept stable, judging whether the actual current of the electric pump is larger than the maximum current limit value of the electric pump and continuing to use
Time, if yes, go to step 106, otherwise go to step 105;
105, judging whether the actual current of the electric pump is larger than the target current upper limit threshold of the electric pump and smaller than the maximum current limit value of the electric pump continuously
Time, if yes, enterStep 108, otherwise, entering step 107;
step 112, operating an electric pump, stopping the engine, normally operating a start-stop function, and then entering step 113;
and step 113, judging whether the start-stop function is finished, if so, entering step 102, otherwise, entering step 112.
Target rotation speed: measuring empirical values according to the control oil pressure and the lubricating flow of the gearbox;
target current: the empirical values are measured under different oil temperature and electric pump rotating speed experimental conditions;
target current upper limit threshold: maximum current value allowed by normal operation of the electric pump;
target current lower limit threshold: the minimum current value allowed by the normal operation of the electric pump;
maximum current limit of electric pump: maximum current value allowed by the electric pump.
The vehicle TCU needs to first set the above parameters.
The foregoing is illustrative of the best mode of the invention and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.
Claims (5)
1. The method for controlling the load of the electric pump for the automatic gearbox is characterized by comprising the following steps of:
obtaining a target current of the electric pump by utilizing the oil temperature of the gearbox and the rotating speed of the electric pump, and then feeding back the load condition of the output end of the electric pump through the actual current of the electric pump;
judging whether the load of the output end of the electric pump is in a reasonable range, if the load exceeds the current fluctuation threshold range of a target or exceeds the maximum current value allowed by the electric pump;
and controlling the electric pump to stop rotating, and forbidding the whole vehicle to start and stop.
2. The electric pump load control method for an automatic transmission according to claim 1, characterized by comprising the steps of;
starting at step 101, waiting for an instruction for starting a start-stop function;
step 102, judging whether the start-stop function is started, if so, entering step 103, otherwise, entering step 101 to continue waiting;
103, under the condition that the engine is stopped, the TCU controller sends a required target rotating speed of the electric pump;
104, after the actual rotating speed of the electric pump is kept stable, judging whether the actual current of the electric pump is larger than the maximum current limit value of the electric pump and continuing to use
Time, if yes, go to step 106, otherwise go to step 105;
step 106, judging that the electric pump has an over-high current fault, and then entering step 110;
105, judging whether the actual current of the electric pump is larger than the target current upper limit threshold of the electric pump and smaller than the maximum current limit value of the electric pump continuously
Time, if yes, go to step 108, otherwise go to step 107;
step 108, judging that the load of the electric pump is overhigh, and then entering step 110;
step 107, judging whether the actual current of the electric pump is smaller than the target current lower limit threshold value of the electric pump and continuing
Time, if yes, go to step 109, otherwise go to step 112;
step 109, judging that the electric pump load is too low, and then entering step 110;
step 110, stopping the electric pump, sending the fault information of the electric pump to an engine controller by a TCU (thyristor controlled unit) to restart the engine, forbidding a start-stop function of the whole vehicle, displaying 'start-stop function off' on an instrument panel to remind a driver, and entering step 111;
step 111, ending;
step 112, operating an electric pump, stopping the engine, normally operating a start-stop function, and then entering step 113;
and step 113, judging whether the start-stop function is finished, if so, entering step 102, otherwise, entering step 112.
3. The electric pump load control method for an automatic transmission according to claim 1,
the time is generally set to be 1s-2s according to the matching requirements of different vehicle types.
4. The electric pump load control method for an automatic transmission according to claim 1,
the time is generally set to be 2.5s-4s according to the matching requirements of different vehicle types.
5. The electric pump load control method for an automatic transmission according to claim 1,
the time is generally set to be 2.5s-4s according to the matching requirements of different vehicle types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911372774.6A CN110985654B (en) | 2019-12-27 | 2019-12-27 | Electric pump load control method for automatic gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911372774.6A CN110985654B (en) | 2019-12-27 | 2019-12-27 | Electric pump load control method for automatic gearbox |
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| Publication Number | Publication Date |
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| CN110985654A true CN110985654A (en) | 2020-04-10 |
| CN110985654B CN110985654B (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911372774.6A Active CN110985654B (en) | 2019-12-27 | 2019-12-27 | Electric pump load control method for automatic gearbox |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59185196A (en) * | 1983-04-04 | 1984-10-20 | Matsushita Electric Ind Co Ltd | Driving device of compressor |
| CN101454514A (en) * | 2006-06-01 | 2009-06-10 | 株式会社竹内制作所 | Work vehicle |
| CN104836205A (en) * | 2015-05-29 | 2015-08-12 | 许继集团有限公司 | Motor overload protection method and motor control system using method |
| CN106200428A (en) * | 2016-07-06 | 2016-12-07 | 中国第汽车股份有限公司 | Auxiliary oil pump motor speed self-adaptation control method |
| CN108216461A (en) * | 2017-12-22 | 2018-06-29 | 深圳天轮科技有限公司 | Balancing bicycle motor method of controlling security and device |
| CN108223401A (en) * | 2017-12-30 | 2018-06-29 | 盛瑞传动股份有限公司 | Electric pump load too high method for diagnosing faults and device |
| CN108223344A (en) * | 2017-12-30 | 2018-06-29 | 盛瑞传动股份有限公司 | Electric pump control method and system |
| CN108303584A (en) * | 2018-02-01 | 2018-07-20 | 广东万家乐燃气具有限公司 | Detection method and water dispenser |
-
2019
- 2019-12-27 CN CN201911372774.6A patent/CN110985654B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59185196A (en) * | 1983-04-04 | 1984-10-20 | Matsushita Electric Ind Co Ltd | Driving device of compressor |
| CN101454514A (en) * | 2006-06-01 | 2009-06-10 | 株式会社竹内制作所 | Work vehicle |
| CN104836205A (en) * | 2015-05-29 | 2015-08-12 | 许继集团有限公司 | Motor overload protection method and motor control system using method |
| CN106200428A (en) * | 2016-07-06 | 2016-12-07 | 中国第汽车股份有限公司 | Auxiliary oil pump motor speed self-adaptation control method |
| CN108216461A (en) * | 2017-12-22 | 2018-06-29 | 深圳天轮科技有限公司 | Balancing bicycle motor method of controlling security and device |
| CN108223401A (en) * | 2017-12-30 | 2018-06-29 | 盛瑞传动股份有限公司 | Electric pump load too high method for diagnosing faults and device |
| CN108223344A (en) * | 2017-12-30 | 2018-06-29 | 盛瑞传动股份有限公司 | Electric pump control method and system |
| CN108303584A (en) * | 2018-02-01 | 2018-07-20 | 广东万家乐燃气具有限公司 | Detection method and water dispenser |
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| CN110985654B (en) | 2021-07-30 |
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