CN113847417B - Control method and device for pressure control electromagnetic valve of cleaning clutch - Google Patents
Control method and device for pressure control electromagnetic valve of cleaning clutch Download PDFInfo
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- CN113847417B CN113847417B CN202111200251.0A CN202111200251A CN113847417B CN 113847417 B CN113847417 B CN 113847417B CN 202111200251 A CN202111200251 A CN 202111200251A CN 113847417 B CN113847417 B CN 113847417B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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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
- F16H2061/0043—Cleaning of hydraulic parts, e.g. removal of an orifice clogging
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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
- F16H2061/1276—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 a friction device, e.g. clutches or brakes
- F16H2061/128—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 a friction device, e.g. clutches or brakes the main clutch
Abstract
The application discloses control method and device for cleaning clutch pressure control solenoid valve, and the control method comprises the following steps: judging whether the gearbox meets the cleaning condition of a first cleaning strategy or not under the condition that the pressure of the clutch is abnormal; if so, cleaning the clutch pressure control electromagnetic valve by adopting a first cleaning strategy: reducing the main oil pressure of a power source of a hydraulic system to a preset value; controlling the clutch pressure control solenoid valve to keep the expected pressure within a preset range within preset time, and rising or falling the expected pressure with a preset slope to realize the cleaning of the clutch pressure control solenoid valve; after the cleaning is finished, measuring the actual pressure of the clutch; and if the minimum value of the actual pressure is 0, finishing the cleaning and outputting the information that the whole vehicle is recovered to be normal. The clamping stagnation problem of more than 90% can be effectively solved to this application, prevents to lead to the engine to flame out because of the clamping stagnation, has greatly reduced whole car simultaneously and has got into limp or fault state because of the clamping stagnation, has improved the reliability and the security of whole car.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a control method and a control device for a pressure control electromagnetic valve of a cleaning clutch.
Background
A typical Dual Clutch Transmission (DCT) is composed of two clutches that are coaxially nested or arranged in parallel, two input shafts that are coaxially and arranged inside and outside, two output shafts that are arranged in parallel, a plurality of synchronizer devices, a plurality of shift forks, and 1 differential, which are arranged on the output shafts, and 1 Hydraulic module (HCU). The HCU is distributed with electromagnetic valves with different functions, when the gearbox works, the corresponding actuating mechanism is controlled in a hydraulic driving mode by controlling the electromagnetic valves, and the main actuating mechanism comprises a clutch and a synchronizer shifting fork.
The double clutches are used as core parts of the DCT, and mainly have the functions of transmitting engine torque to the gearbox and transmitting the engine torque to wheels through the gearbox, so that the vehicle is driven to run. In order to enable a vehicle to have good driving performance, the speed and the size of the Clutch combination all need to be accurately controlled, and a Clutch Pressure Control solenoid Valve (CPCV) is a component for directly controlling the Clutch, so that when the CPCV is jammed due to impurities (generally, aluminum chips, iron chips and the like generated in the operation process of a gearbox), the CPCV cannot be controlled according to the expectation of a Transmission Control Unit (TCU), so that the actual Pressure of the Clutch cannot be controlled, the combination speed and the size of the Clutch are abnormal, and the problem that the normal driving of the vehicle is influenced by flameout, power interruption and the like of the whole vehicle is caused in severe cases.
At present, in the normal working process of a gearbox, a CPCV cleaning function is added, and CPCV cleaning is carried out regularly, so that the jamming probability is reduced. However, the cleaning is performed periodically regardless of whether the CPCV is stuck or not, which leads to an increase in fuel consumption.
The Cut-Off Valve (COV) functions as a switch during clutch control. When the clutch is stuck, only the characteristic of the clutch pressure sensor is judged to be abnormal, the switching valve COV of the current clutch is closed, the pressure of the CPCV is reduced to 0, the gearbox enters limp control, the purpose of protecting the clutch is achieved, and therefore the whole vehicle loses part of driving functions. However, for the transmission without the COV, when the CPCV is stuck, the transmission firstly enters limp control, and the actual pressure of the clutch is always in an uncontrolled state, which may cause the loss of the whole driving function of the whole vehicle, and reduce the reliability and safety of the whole vehicle.
Disclosure of Invention
The application provides a control method and device for cleaning clutch pressure control solenoid valve, reduces power source main oil pressure of a hydraulic system under the condition of meeting the conditions, cleans the clutch pressure control solenoid valve on the basis, can effectively solve the problem of clamping stagnation of more than 90%, prevents an engine from stalling due to the clamping stagnation, greatly reduces the problem that the whole vehicle enters a limp or fault state due to the clamping stagnation, and improves the reliability and the safety of the whole vehicle.
The application provides a control method for cleaning a clutch pressure control solenoid valve, which comprises the following steps:
judging whether the gearbox meets the cleaning condition of a first cleaning strategy or not under the condition that the pressure of the clutch is abnormal;
if so, cleaning the clutch pressure control electromagnetic valve by adopting a first cleaning strategy:
reducing the main oil pressure of a power source of a hydraulic system to a preset value;
controlling the clutch pressure control solenoid valve to keep the expected pressure within a preset range within preset time, and rising or falling the expected pressure with a preset slope to realize the cleaning of the clutch pressure control solenoid valve;
after the cleaning is finished, measuring the actual pressure of the clutch;
and if the minimum value of the actual pressure is 0, finishing the cleaning and outputting the information that the whole vehicle is recovered to be normal.
Preferably, the cleaning conditions of the first cleaning strategy comprise:
the rotating speed of the working shaft of the gearbox is asynchronous with the rotating speed of the engine; and is
The shifting fork can not be taken off.
Preferably, the cleaning conditions of the first cleaning strategy include:
the rotating speed of the working shaft of the gearbox is asynchronous with the rotating speed of the engine; and is provided with
The actual pressure of the clutch is greater than a first threshold.
Preferably, if the minimum value of the actual pressure is not 0, judging whether the number of times of cleaning by using the first cleaning strategy exceeds a second threshold value;
and if not, adopting a first cleaning strategy to clean the clutch pressure control electromagnetic valve again.
Preferably, if the number of times of cleaning by the first cleaning strategy exceeds a second threshold value, information that the whole vehicle enters a fault state is output.
Preferably, if the gearbox does not meet the cleaning conditions of the first cleaning strategy, the clutch pressure control solenoid valve is cleaned by adopting a second cleaning strategy.
The application also provides a control device for cleaning the clutch pressure control electromagnetic valve, which comprises a judging module, a first cleaning module, a measuring module and an output module;
the judging module is used for judging whether the gearbox meets the cleaning condition of the first cleaning strategy or not under the condition that the pressure of the clutch is abnormal;
the first cleaning module is used for cleaning the clutch pressure control solenoid valve by adopting a first cleaning strategy:
reducing the main oil pressure of a power source of a hydraulic system to a preset value;
controlling the clutch pressure control solenoid valve to keep the expected pressure within a preset range within preset time, and increasing or decreasing the expected pressure with a preset slope to realize the cleaning of the clutch pressure control solenoid valve;
the measuring module is used for measuring the actual pressure of the clutch after the cleaning is finished;
the output module is used for outputting the information that the whole vehicle is recovered to be normal under the condition that the minimum value of the actual pressure is 0.
Preferably, the judging module is further configured to judge whether the number of times of cleaning using the first cleaning strategy exceeds the second threshold value in a case where the minimum value of the actual pressure is not 0.
Preferably, the output module is further used for outputting information that the whole vehicle enters a fault state when the number of times of cleaning by adopting the first cleaning strategy exceeds a second threshold value.
Preferably, the control device further comprises a second cleaning module for cleaning the clutch pressure control solenoid valve by adopting a second cleaning strategy if the gearbox does not meet the cleaning conditions of the first cleaning strategy.
Other features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a flow chart of a control method for a purge clutch pressure control solenoid provided herein;
fig. 2 is a block diagram of a control device of a purge clutch pressure control solenoid valve according to the present invention.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
For a gearbox without COV, the control method and the control device for cleaning the clutch pressure control electromagnetic valve are provided, the power source main oil pressure of a hydraulic system is reduced firstly under the condition that conditions are met, the clutch pressure control electromagnetic valve is cleaned on the basis, the problem of clamping stagnation of more than 90% can be effectively solved, engine flameout caused by clamping stagnation is prevented, the problem that a whole vehicle enters a limp or fault state due to clamping stagnation is greatly reduced, and the reliability and the safety of the whole vehicle are improved.
Example one
As shown in fig. 1, the present application provides a control method of a clutch pressure control solenoid valve for washing, including the steps of:
s110: and judging whether the gearbox meets the cleaning condition of the first cleaning strategy or not under the condition that the pressure of the clutch is abnormal, wherein the step is used for judging whether the current vehicle state is necessary to execute the first cleaning strategy or not. If yes, go to S120; otherwise, S180 is performed.
Specifically, the cleaning conditions of the first cleaning strategy include the following two cases:
1. the first cleaning strategy needs to be implemented in case the following two conditions are met:
1) The rotational speed of the working shaft of the gearbox is not synchronized with the rotational speed of the engine.
Specifically, whether the rotating speed of the working shaft of the gearbox and the rotating speed of the engine are synchronous or not is judged through the vehicle speed and the current gear. If the clutch is synchronous, the driving of the whole vehicle cannot be influenced no matter how the actual pressure of the clutch changes, and the current gear can be kept running at the moment; if the engine speed and the working shaft speed are not synchronized, the stuck may cause the engine to stall, which is one of the conditions for executing the first wash strategy.
2) The shifting fork can not be taken off.
When the pressure abnormality of the clutch is detected, the clutch is firstly opened (the expected pressure of the clutch is reduced to 0), then the shifting fork is picked off, and if the shifting fork can be picked off, the engine does not have the risk of flameout. Since the engine is not loaded at this time, a conventional wash (i.e., second wash strategy) may be performed; if the shifting fork cannot be removed, the engine is directly flamed out due to conventional cleaning, and only the first cleaning strategy can be executed.
2. The first cleaning strategy needs to be implemented in case the following two conditions are met:
1) The rotational speed of the working shaft of the gearbox is not synchronous with the rotational speed of the engine. As above, it is not described herein in detail.
2) The actual pressure of the clutch is greater than a first threshold.
It is verified that when the actual clutch pressure is greater than the first threshold (for example, 350 kPa), even if the maximum shift parameter is used, the shift fork cannot be removed, so that the first cleaning strategy is immediately adopted for cleaning under the condition that the engine speed and the working shaft speed are not synchronous and the actual clutch pressure is greater than the first threshold.
S120: and cleaning the clutch pressure control electromagnetic valve by adopting a first cleaning strategy, wherein the first cleaning strategy is to clean on the basis of reducing the main oil pressure of a power source of the hydraulic system.
In a transmission without the COV, when the CPCV is stuck, even if the expected pressure of the clutch is reduced to 0, the actual pressure of the clutch is in an uncontrolled state due to the existence of the sticking, and at this time, the actual pressure of the clutch can be controlled only by adjusting the main oil pressure of the power source of the hydraulic system when the actual pressure of the clutch is reduced.
A Main Pressure Control solenoid (MPCV) is a solenoid Valve used to Control the Main oil Pressure of a power source of a hydraulic system, and because of its precision, cost, and other factors, the minimum Pressure of the MPCV can only reach a first threshold (e.g. 350 kPa). By verification, under the condition of ensuring that the engine does not extinguish the fire, the maximum load pressure which can be borne by the engine when the clutch is in the gear is 400kPa, so that the main oil pressure is reduced for cleaning in theory.
Specifically, the first cleaning strategy comprises the following steps:
s1201: the power source main oil pressure of the hydraulic system is reduced to a preset value (e.g., a minimum value or 0).
S1202: and controlling the expected pressure of the clutch pressure control solenoid valve CPCV to be kept in a preset range in preset time, and rising or falling the expected pressure at a preset slope to realize the cleaning of the clutch pressure control solenoid valve.
At the moment, the main oil pressure is a preset value, and the actual pressure of the clutch is the maximum preset value, so that no matter how large the CPCV expected pressure is, the engine can not be flamed out. Preferably, the desired pressure of the CPCV is increased as much as possible to improve the cleaning effect.
S130: after the purge is complete, the actual pressure of the clutch is measured.
S140: judging whether the minimum value of the actual pressure of the clutch is 0, namely judging whether the actual pressure of the clutch can be reduced to 0, if so, executing S150; otherwise, S160 is executed.
After each cleaning, whether the clamping stagnation problem is solved or not needs to be judged through the actual pressure of the clutch.
S150: and (5) completing cleaning, recovering pressure, and outputting information that the whole vehicle is recovered to be normal.
If the actual pressure of the clutch can be reduced to 0, the clamping stagnation is judged to disappear, and at the moment, the cleaning of the first cleaning strategy is completed, so that the whole vehicle is restored to a normal control state.
S160: and judging whether the number of times of cleaning by adopting the first cleaning strategy exceeds a second threshold value. If yes, go to S170; otherwise, return to S120.
If the actual pressure of the clutch after cleaning still cannot be reduced to 0, determining that the clamping stagnation still exists, executing the first cleaning strategy again, and repeating the judgment.
S170: and outputting the information that the whole vehicle enters a fault state.
If the cleaning times exceed a second threshold value, judging that the current clamping stagnation problem cannot be solved through a first cleaning strategy, and outputting fault state information when the whole vehicle is in a fault state.
S180: and cleaning the clutch pressure control solenoid valve by adopting a second cleaning strategy. The second cleaning strategy is a cleaning mode in the prior art, namely the expected pressure of the clutch pressure control solenoid valve CPCV is directly controlled to be kept in a preset range within a preset time without reducing the main oil pressure of a power source of a hydraulic system, and the expected pressure is increased or decreased by a preset slope, so that the cleaning of the clutch pressure control solenoid valve is realized.
Example two
Based on the control method, the application also provides a control device for the pressure control electromagnetic valve of the cleaning clutch. As shown in fig. 2, the control device includes a determination module 210, a first cleaning module 220, a measurement module 230, and an output module 240.
The determining module 210 is configured to determine whether the transmission meets a cleaning condition of a first cleaning strategy when the pressure of the clutch is abnormal.
The first purge module 220 is configured to purge the clutch pressure control solenoid using a first purge strategy:
reducing the main oil pressure of a power source of a hydraulic system to a preset value;
and controlling the expected pressure of the clutch pressure control electromagnetic valve to be kept in a preset range in preset time, and rising or falling the expected pressure with a preset slope to realize the cleaning of the clutch pressure control electromagnetic valve.
The measurement module 230 is used to measure the actual pressure of the clutch after the purge is completed.
The output module 240 is configured to output information that the whole vehicle is recovered to be normal when the minimum value of the actual pressure is 0.
Preferably, the judging module 210 is further configured to judge whether the number of times of cleaning using the first cleaning strategy exceeds a second threshold value in the case that the minimum value of the actual pressure is not 0, so as to determine whether cleaning using the first cleaning strategy is possible again.
Preferably, the output module 240 is further configured to output information that the whole vehicle enters a fault state when the number of times of cleaning with the first cleaning strategy exceeds a second threshold.
Preferably, the control apparatus further comprises a second purge module 250, the second purge module 250 being configured to purge the clutch pressure control solenoid valve using a second purge strategy if the transmission does not satisfy the purge condition of the first purge strategy.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (7)
1. A control method of a purge clutch pressure control solenoid valve, comprising:
judging whether the gearbox meets the cleaning condition of a first cleaning strategy or not under the condition that the pressure of the clutch is abnormal;
if so, adopting the first cleaning strategy to clean the clutch pressure control electromagnetic valve:
reducing the main oil pressure of a power source of a hydraulic system to a preset value;
controlling the clutch pressure control electromagnetic valve to keep the expected pressure within a preset range within preset time, and increasing or decreasing the expected pressure with a preset slope to realize the cleaning of the clutch pressure control electromagnetic valve;
after the cleaning is finished, measuring the actual pressure of the clutch;
if the minimum value of the actual pressure is 0, finishing cleaning and outputting information of the whole vehicle for recovering to be normal;
if the gearbox does not meet the cleaning condition of the first cleaning strategy, cleaning the clutch pressure control electromagnetic valve by adopting a second cleaning strategy;
wherein the cleaning conditions of the first cleaning strategy comprise:
the rotating speed of the working shaft of the gearbox is asynchronous with the rotating speed of the engine; and is
The shifting fork can not be taken off.
2. The control method of a purge clutch pressure control solenoid valve of claim 1, wherein the purge conditions of the first purge strategy comprise:
the rotating speed of the working shaft of the gearbox is asynchronous with the rotating speed of the engine; and is provided with
The actual pressure of the clutch is greater than a first threshold.
3. The control method of a purge clutch pressure control solenoid valve according to claim 1, wherein if the minimum value of the actual pressure is not 0, it is determined whether the number of purges using the first purge strategy exceeds a second threshold value;
if not, adopting the first cleaning strategy to clean the clutch pressure control electromagnetic valve again.
4. The control method of the washing clutch pressure control solenoid valve according to claim 3, characterized in that if the number of times of washing with the first washing strategy exceeds the second threshold value, information that the entire vehicle enters a failure state is output.
5. A control device for cleaning a clutch pressure control electromagnetic valve is characterized by comprising a judgment module, a first cleaning module, a measurement module and an output module;
the judgment module is used for judging whether the gearbox meets the cleaning condition of a first cleaning strategy or not under the condition that the pressure of the clutch is abnormal;
the first cleaning module is used for cleaning the clutch pressure control solenoid valve by adopting the first cleaning strategy:
reducing the main oil pressure of a power source of a hydraulic system to a preset value;
controlling the clutch pressure control electromagnetic valve to keep the expected pressure within a preset range within preset time, and increasing or decreasing the expected pressure with a preset slope to realize the cleaning of the clutch pressure control electromagnetic valve;
the measuring module is used for measuring the actual pressure of the clutch after the cleaning is finished;
the output module is used for outputting information that the whole vehicle recovers to be normal under the condition that the minimum value of the actual pressure is 0;
wherein the cleaning conditions of the first cleaning strategy comprise:
the rotating speed of the working shaft of the gearbox is asynchronous with the rotating speed of the engine; and is provided with
The gear shifting fork cannot be removed;
the control device further comprises a second cleaning module, and the second cleaning module is used for cleaning the clutch pressure control electromagnetic valve by adopting a second cleaning strategy under the condition that the gearbox does not meet the cleaning condition of the first cleaning strategy.
6. The control device for washing a clutch pressure control solenoid according to claim 5, wherein the judging module is further configured to judge whether the number of washing with the first washing strategy exceeds a second threshold value in a case where the minimum value of the actual pressure is not 0.
7. The control device for the washing clutch pressure control solenoid valve according to claim 6, wherein the output module is further configured to output information that the whole vehicle enters a fault state when the number of times of washing with the first washing strategy exceeds the second threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200251.0A CN113847417B (en) | 2021-10-14 | 2021-10-14 | Control method and device for pressure control electromagnetic valve of cleaning clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200251.0A CN113847417B (en) | 2021-10-14 | 2021-10-14 | Control method and device for pressure control electromagnetic valve of cleaning clutch |
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| CN113847417A CN113847417A (en) | 2021-12-28 |
| CN113847417B true CN113847417B (en) | 2023-03-28 |
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| CN202111200251.0A Active CN113847417B (en) | 2021-10-14 | 2021-10-14 | Control method and device for pressure control electromagnetic valve of cleaning clutch |
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| CN115350986B (en) * | 2022-08-29 | 2023-12-15 | 广州汽车集团股份有限公司 | Method and device for flushing clutch electromagnetic valve, equipment and storage medium |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841550B (en) * | 2012-09-06 | 2014-06-04 | 安徽江淮汽车股份有限公司 | Washing control system for double-clutch automatic gearbox |
| CN109695640B (en) * | 2017-10-20 | 2021-01-22 | 上海汽车集团股份有限公司 | Clutch engagement control system and clutch engagement control method |
| CN109990016B (en) * | 2017-12-29 | 2021-01-05 | 长城汽车股份有限公司 | Wet type dual-clutch transmission flushing valve control method |
| CN110893861B (en) * | 2018-08-24 | 2021-06-04 | 广州汽车集团股份有限公司 | Method and system for judging jamming of electromagnetic valve of clutch of hybrid vehicle and automobile |
| KR20200080775A (en) * | 2018-12-27 | 2020-07-07 | 현대 파워텍 주식회사 | Apparatus for cleaning solenoid valve and method thereof |
| CN112283341B (en) * | 2020-12-23 | 2021-03-16 | 北京航空航天大学 | Method for preventing electromagnetic valve of clutch of transmission in fixed gear from being blocked |
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