CN109572711B - Method for diagnosing pressure sensor of double-clutch automatic transmission - Google Patents
Method for diagnosing pressure sensor of double-clutch automatic transmission Download PDFInfo
- Publication number
- CN109572711B CN109572711B CN201811554807.4A CN201811554807A CN109572711B CN 109572711 B CN109572711 B CN 109572711B CN 201811554807 A CN201811554807 A CN 201811554807A CN 109572711 B CN109572711 B CN 109572711B
- Authority
- CN
- China
- Prior art keywords
- pressure
- working condition
- clutch
- intermittent
- pressure sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- 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
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/0205—Diagnosing or detecting failures; Failure detection models
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Human Computer Interaction (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a method for diagnosing a pressure sensor of a double-clutch automatic transmission, which comprises a clutch opening working condition diagnosis mode, a clutch pre-oil-filling working condition diagnosis mode and a clutch intermittent working condition diagnosis mode. According to the method for diagnosing the pressure sensor of the double-clutch automatic transmission, whether the clutch works normally or not is diagnosed under different working conditions of the clutch, whether the pressure sensor works normally or not can be effectively diagnosed, and maintenance guidance of the pressure sensor is provided.
Description
Technical Field
The invention relates to the field of transmissions, in particular to a method for diagnosing a pressure sensor of a double-clutch automatic transmission.
Background
A typical wet dual clutch automatic transmission consists of two clutches nested coaxially or arranged in parallel, two input shafts nested coaxially and inside and outside, two output shafts arranged in parallel, a plurality of synchronizer devices arranged on the output shafts, a plurality of shift forks and 1 differential. The odd and even gears of the transmission are respectively arranged on two input shafts, and through the switching of two clutches and the action of different synchronizers, the torque conversion and the output are realized through different output shafts, and the transmission power flow is as follows: engine output torque → dual clutch → transmission input shaft → transmission output shaft → wheels. The dual clutches are engaged or disengaged according to control commands throughout the transmission of the power flow.
During torque transfer control of the transmission, a pressure sensor obtains clutch oil pressure to achieve a desired clutch engagement pressure (also referred to as a desired pressure). The desired pressure and desired flow are converted to a desired solenoid control current, the dither amplitude and frequency of which are output to a TCU (automatic transmission control unit). Therefore, whether the pressure sensor operates normally has a large influence on the operation of the dual clutch automatic transmission.
Since there is a deviation in the signal of the pressure sensor without electrical failure, the deviation is affected by the pressure sensor itself and the temperature. The deviation of the pressure sensor causes the expected pressure to fluctuate or control inaccurately in the pressure control process, so that the pressure of the clutch is too high or too low, and the shaking of the gearbox is caused.
Therefore, how to effectively diagnose whether the pressure sensor of the dual-clutch automatic transmission is normal becomes a technical problem to be solved urgently in the field.
Disclosure of Invention
An object of the present invention is to provide a new technical solution for a pressure sensor diagnostic method of a dual clutch automatic transmission, which can effectively diagnose whether the pressure sensor is normal.
According to a first aspect of the present invention, a dual clutch automatic transmission pressure sensor diagnostic method is provided.
The method for diagnosing the pressure sensor of the double-clutch automatic transmission comprises a clutch opening working condition diagnosis mode, a clutch pre-oil-filling working condition diagnosis mode and a clutch intermittent working condition diagnosis mode; wherein the content of the first and second substances,
the clutch opening condition diagnosis mode comprises the following steps:
s11: acquiring actual opening working condition pressure and atmospheric pressure measured by a pressure sensor when the clutch is opened for a long time;
s12: judging whether the difference value between the actual opening working condition pressure and the atmospheric pressure is greater than the opening working condition upper limit value or not, if so, setting the standby opening working condition pressure as the atmospheric pressure, wherein the standby opening working condition pressure is the required pressure for combining the clutch;
s13: circularly executing the steps S11-S12, and if the number of times that the difference value between the actual opening condition pressure and the atmospheric pressure in an ignition signal is larger than or equal to the upper limit value of the opening condition is larger than or equal to N times, sending a signal that the clutch has an opening condition fault;
the clutch pre-filling oil working condition diagnosis mode comprises the following steps:
s21: the method comprises the steps that when the clutch is pre-filled with oil, actual pre-filling oil working condition pressure, atmospheric pressure and ideal pre-filling oil working condition pressure measured by a pressure sensor are obtained, wherein the ideal pre-filling oil working condition pressure is obtained based on oil temperature;
s22: judging whether the difference value between the actual pre-filling oil working condition pressure and the sum of the atmospheric pressure and the ideal pre-filling oil working condition pressure is greater than the upper limit value of the pre-filling oil working condition, if so, setting the standby pre-filling oil working condition pressure as the ideal pre-filling oil working condition pressure, wherein the standby pre-filling oil working condition pressure is the required pressure of the clutch pre-filling oil;
s23: circularly executing the steps S21-S22, and if the number of times that the difference value between the actual pre-filling working condition pressure and the sum of the atmospheric pressure and the ideal pre-filling working condition pressure in one ignition signal is greater than or equal to M times that the upper limit value of the pre-filling working condition is greater than or equal to M times, sending a signal that the pre-filling working condition fault exists in the clutch;
the clutch intermittent operating condition diagnosis mode comprises the following steps:
s31: acquiring actual intermittent working condition pressure, atmospheric pressure and ideal intermittent working condition pressure measured by a pressure sensor when a clutch is intermittent;
s32: judging whether the difference value between the actual intermittent working condition pressure and the sum of the atmospheric pressure and the ideal intermittent working condition pressure is greater than the intermittent working condition upper limit value or not, and if so, setting the standby intermittent working condition pressure as the ideal intermittent working condition pressure;
s33: and circularly executing steps S31-S32, and if the number of times that the difference value between the actual intermittent working condition pressure and the sum of the atmospheric pressure and the ideal intermittent working condition pressure in one ignition signal is larger than or equal to the intermittent working condition upper limit value is larger than or equal to P times, signaling that the clutch has intermittent working condition faults.
Optionally, the upper limit of the opening condition in step S12 is less than or equal to a first threshold, where the first threshold is 10% -30% of the atmospheric pressure.
Optionally, the first threshold is 20% of atmospheric pressure.
Optionally, N in step S13 is 3.
Optionally, the upper limit value of the pre-filling condition in step S22 is less than or equal to a second threshold, where the second threshold is 20% -40% of the atmospheric pressure.
Optionally, the second threshold is 30% of atmospheric pressure.
Optionally, M in step S23 is 4.
Optionally, the intermittent operating condition upper limit value in step S32 is less than or equal to a third threshold, where the third threshold is 20% -40% of the atmospheric pressure.
Optionally, the third threshold is 30% of atmospheric pressure.
Optionally, P in step S33 is 4.
According to the method for diagnosing the pressure sensor of the double-clutch automatic transmission, whether the clutch works normally or not is diagnosed under different working conditions of the clutch, whether the pressure sensor works normally or not can be effectively diagnosed, and maintenance guidance of the pressure sensor is provided.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail. 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 invention 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 invention, its application, or uses.
Techniques, methods, and apparatus known to those 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.
The present disclosure provides a dual clutch automatic transmission pressure sensor diagnostic method.
The method for diagnosing the pressure sensor of the double-clutch automatic transmission comprises a clutch opening working condition diagnosis mode, a clutch pre-oil-filling working condition diagnosis mode and a clutch intermittent working condition diagnosis mode.
The clutch-open condition diagnostic mode includes the steps of:
step S11: and acquiring the actual opening condition pressure and the atmospheric pressure measured by the pressure sensor when the clutch is opened for a long time. The atmospheric pressure is typically measured by an atmospheric pressure sensor disposed within the engine.
Step S12: and judging whether the difference value between the actual opening condition pressure and the atmospheric pressure is greater than the opening condition upper limit value or not. If yes, setting the standby opening working condition pressure as the atmospheric pressure. The stand-by opening condition pressure in this disclosure refers to the value used by the TCU in calculating the clutch apply pressure. If not, the pressure of the standby opening working condition is the actual opening working condition pressure measured by the pressure sensor.
In specific implementation, the upper limit value of the opening condition in step S12 is less than or equal to a first threshold, and the first threshold is 10% -30% of the atmospheric pressure. Further, the first threshold is 20% of atmospheric pressure.
Step S13: steps S11-S12 are executed in a loop. And if the number of times that the difference value between the actual opening condition pressure and the atmospheric pressure in one ignition signal is greater than or equal to N times that the opening condition upper limit value is greater than or equal to N times, sending a signal that the clutch has an opening condition fault. The signal indicating that the clutch has the open condition fault may be, for example, a warning sound or a warning light.
In a specific implementation, N in step S13 may be 3.
The clutch opening condition diagnosis mode can also acquire a zero drift value of the sensor.
The clutch pre-filling oil working condition diagnosis mode comprises the following steps:
step S21: and when the clutch is pre-filled with oil, acquiring the actual pre-filling oil working condition pressure, the atmospheric pressure and the ideal pre-filling oil working condition pressure measured by the pressure sensor. The atmospheric pressure is typically measured by an atmospheric pressure sensor disposed within the engine. The ideal pre-charge oil condition pressure may be calculated by the TCU based on the oil temperature.
Step S22: and judging whether the difference value between the actual pre-filling oil working condition pressure and the sum of the atmospheric pressure and the ideal pre-filling oil working condition pressure is greater than the upper limit value of the pre-filling oil working condition. If so, setting the pressure of the standby pre-filling oil working condition as the pressure of the ideal pre-filling oil working condition. The inactive pre-fill condition pressure in this disclosure refers to the value used by the TCU in calculating the clutch apply pressure. If not, the pressure of the standby pre-filling oil working condition is the actual pressure of the pre-filling oil working condition measured by the pressure sensor.
In specific implementation, the upper limit value of the pre-filling oil condition in the step S22 is less than or equal to a second threshold value, and the second threshold value is 20% -40% of the atmospheric pressure. Further, the second threshold is 30% of atmospheric pressure.
Step S23: steps S21-S22 are executed in a loop. And if the number of times that the difference value between the actual pre-filling working condition pressure and the sum of the atmospheric pressure and the ideal pre-filling working condition pressure in one ignition signal is greater than or equal to M times is greater than the upper limit value of the pre-filling working condition, sending a signal that the pre-filling working condition fault exists in the clutch. The signal indicating that the clutch has the pre-charging oil working condition fault can be, for example, a warning sound or a warning light.
In a specific implementation, M in step S23 may be 4.
The clutch intermittent operation condition diagnosis mode comprises the following steps:
step S31: and acquiring actual intermittent working condition pressure, atmospheric pressure and ideal intermittent working condition pressure measured by a pressure sensor when the clutch is intermittent. The atmospheric pressure is typically measured by an atmospheric pressure sensor disposed within the engine. The ideal intermittent operating condition pressure may be calculated by the TCU based on the oil temperature. The clutch in the above-described "clutch pause time" refers to a dead clutch of the two clutches of the dual clutch automatic transmission.
Step S32: and judging whether the difference value of the actual intermittent working condition pressure and the sum of the atmospheric pressure and the ideal intermittent working condition pressure is greater than the intermittent working condition upper limit value or not. If so, setting the standby intermittent working condition pressure as the ideal intermittent working condition pressure. The inactive intermittent condition pressure in this disclosure refers to the value used by the TCU in calculating the clutch apply pressure. If not, the standby intermittent working condition pressure is the actual pre-filling working condition pressure measured by the pressure sensor.
In specific implementation, the upper limit value of the intermittent operating condition in the step S32 is less than or equal to a third threshold value, and the third threshold value is 20% -40% of the atmospheric pressure. Further, the third threshold is 30% of atmospheric pressure.
Step S33: steps S31-S32 are executed in a loop. And if the number of times that the difference value between the actual intermittent working condition pressure and the sum of the atmospheric pressure and the ideal intermittent working condition pressure in one ignition signal is greater than or equal to P times is greater than the intermittent working condition upper limit value, sending a signal that the clutch has intermittent working condition faults. The signal of the clutch having the intermittent working condition fault can be, for example, giving out warning sound or warning light.
In specific implementation, P in step S33 may be 4.
According to the method for diagnosing the pressure sensor of the double-clutch automatic transmission, whether the clutch works normally or not is diagnosed under different working conditions of the clutch, whether the pressure sensor works normally or not can be effectively diagnosed, and maintenance guidance of the pressure sensor is provided.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. 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 invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A pressure sensor diagnosis method for a double-clutch automatic transmission is characterized by comprising a clutch opening working condition diagnosis mode, a clutch pre-oil-charging working condition diagnosis mode and a clutch intermittent working condition diagnosis mode; wherein the content of the first and second substances,
the clutch opening condition diagnosis mode comprises the following steps:
s11: acquiring actual opening working condition pressure and atmospheric pressure measured by a pressure sensor when the clutch is opened for a long time;
s12: judging whether the difference value between the actual opening working condition pressure and the atmospheric pressure is greater than the opening working condition upper limit value or not, if so, setting the standby opening working condition pressure as the atmospheric pressure, wherein the standby opening working condition pressure is the required pressure for combining the clutch;
s13: circularly executing the steps S11-S12, and if the number of times that the difference value between the actual opening condition pressure and the atmospheric pressure in an ignition signal is larger than or equal to the upper limit value of the opening condition is larger than or equal to N times, sending a signal that the clutch has an opening condition fault;
the clutch pre-filling oil working condition diagnosis mode comprises the following steps:
s21: the method comprises the steps that when the clutch is pre-filled with oil, actual pre-filling oil working condition pressure, atmospheric pressure and ideal pre-filling oil working condition pressure measured by a pressure sensor are obtained, wherein the ideal pre-filling oil working condition pressure is obtained based on oil temperature;
s22: judging whether the difference value between the actual pre-filling oil working condition pressure and the sum of the atmospheric pressure and the ideal pre-filling oil working condition pressure is greater than the upper limit value of the pre-filling oil working condition, if so, setting the standby pre-filling oil working condition pressure as the ideal pre-filling oil working condition pressure, wherein the standby pre-filling oil working condition pressure is the required pressure of the clutch pre-filling oil;
s23: circularly executing the steps S21-S22, and if the number of times that the difference value between the actual pre-filling working condition pressure and the sum of the atmospheric pressure and the ideal pre-filling working condition pressure in one ignition signal is greater than or equal to M times that the upper limit value of the pre-filling working condition is greater than or equal to M times, sending a signal that the pre-filling working condition fault exists in the clutch;
the clutch intermittent operating condition diagnosis mode comprises the following steps:
s31: acquiring actual intermittent working condition pressure, atmospheric pressure and ideal intermittent working condition pressure measured by a pressure sensor when a clutch is intermittent;
s32: judging whether the difference value between the actual intermittent working condition pressure and the sum of the atmospheric pressure and the ideal intermittent working condition pressure is greater than the intermittent working condition upper limit value or not, and if so, setting the standby intermittent working condition pressure as the ideal intermittent working condition pressure;
s33: and circularly executing steps S31-S32, and if the number of times that the difference value between the actual intermittent working condition pressure and the sum of the atmospheric pressure and the ideal intermittent working condition pressure in one ignition signal is larger than or equal to the intermittent working condition upper limit value is larger than or equal to P times, signaling that the clutch has intermittent working condition faults.
2. The dual clutch automatic transmission pressure sensor diagnostic method as claimed in claim 1, wherein the opening condition upper limit value in the step S12 is less than or equal to a first threshold value, and the first threshold value is 10% -30% of atmospheric pressure.
3. The dual clutch automatic transmission pressure sensor diagnostic method as set forth in claim 2 wherein said first threshold is 20% of atmospheric pressure.
4. The dual clutch automatic transmission pressure sensor diagnostic method as claimed in claim 2, characterized in that N in the step S13 is 3.
5. The dual clutch automatic transmission pressure sensor diagnostic method as claimed in claim 1, wherein the pre-fill condition upper limit value in step S22 is less than or equal to a second threshold value, the second threshold value being 20% -40% of atmospheric pressure.
6. The dual clutch automatic transmission pressure sensor diagnostic method as set forth in claim 5 wherein said second threshold is 30% of atmospheric pressure.
7. The dual clutch automatic transmission pressure sensor diagnostic method as claimed in claim 5, wherein M in the step S23 is 4.
8. The dual clutch automatic transmission pressure sensor diagnostic method as claimed in claim 1, wherein the intermittent operation upper limit value in the step S32 is less than or equal to a third threshold value, and the third threshold value is 20% -40% of atmospheric pressure.
9. The dual clutch automatic transmission pressure sensor diagnostic method as set forth in claim 8, wherein the third threshold is 30% of atmospheric pressure.
10. The dual clutch automatic transmission pressure sensor diagnostic method as claimed in claim 8, wherein P in the step S33 is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554807.4A CN109572711B (en) | 2018-12-19 | 2018-12-19 | Method for diagnosing pressure sensor of double-clutch automatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554807.4A CN109572711B (en) | 2018-12-19 | 2018-12-19 | Method for diagnosing pressure sensor of double-clutch automatic transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109572711A CN109572711A (en) | 2019-04-05 |
| CN109572711B true CN109572711B (en) | 2020-09-01 |
Family
ID=65930018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811554807.4A Active CN109572711B (en) | 2018-12-19 | 2018-12-19 | Method for diagnosing pressure sensor of double-clutch automatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109572711B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014101B (en) * | 2020-08-19 | 2022-03-18 | 中国第一汽车股份有限公司 | Processing method, device, equipment and storage medium |
| CN112065983B (en) * | 2020-08-20 | 2021-05-28 | 安徽江淮汽车集团股份有限公司 | Method, device and equipment for detecting abnormal fault of clutch pressure and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791949A (en) * | 2010-03-16 | 2010-08-04 | 重庆长安汽车股份有限公司 | System and method for detecting clutch position of hybrid power vehicle |
| CN103196670A (en) * | 2013-03-25 | 2013-07-10 | 南京梅山冶金发展有限公司 | Judging method for speed changing box clutch faults |
| CN104458119A (en) * | 2013-09-12 | 2015-03-25 | 上海汽车集团股份有限公司 | Hydraulic gearbox hydraulic sensor fault diagnosis device and method thereof |
| JP2016047663A (en) * | 2014-08-27 | 2016-04-07 | ボッシュ株式会社 | Clutch control method and automatic clutch control device |
| CN106671983A (en) * | 2015-11-05 | 2017-05-17 | 现代自动车株式会社 | Diagnostic method for determining clutch failure of dct |
| CN108374889A (en) * | 2018-02-26 | 2018-08-07 | 安徽江淮汽车集团股份有限公司 | Double clutch fault detect and processing method and transmission system |
-
2018
- 2018-12-19 CN CN201811554807.4A patent/CN109572711B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791949A (en) * | 2010-03-16 | 2010-08-04 | 重庆长安汽车股份有限公司 | System and method for detecting clutch position of hybrid power vehicle |
| CN103196670A (en) * | 2013-03-25 | 2013-07-10 | 南京梅山冶金发展有限公司 | Judging method for speed changing box clutch faults |
| CN104458119A (en) * | 2013-09-12 | 2015-03-25 | 上海汽车集团股份有限公司 | Hydraulic gearbox hydraulic sensor fault diagnosis device and method thereof |
| JP2016047663A (en) * | 2014-08-27 | 2016-04-07 | ボッシュ株式会社 | Clutch control method and automatic clutch control device |
| CN106671983A (en) * | 2015-11-05 | 2017-05-17 | 现代自动车株式会社 | Diagnostic method for determining clutch failure of dct |
| CN108374889A (en) * | 2018-02-26 | 2018-08-07 | 安徽江淮汽车集团股份有限公司 | Double clutch fault detect and processing method and transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109572711A (en) | 2019-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9222531B2 (en) | Vehicle transmission with tie-up monitoring logic | |
| CN109572711B (en) | Method for diagnosing pressure sensor of double-clutch automatic transmission | |
| US8682545B2 (en) | Damping oscillations during a gear ratio change of a dual clutch powershift transmission | |
| US9625032B2 (en) | Method for executing a gearshift in an automatic transmission | |
| CN103982650B (en) | The Half engagement point decision method of hydraulic automatic speed variator clutch and system | |
| KR101628533B1 (en) | Method for diagnosing failure in dual clutch transmission | |
| CN106644461B (en) | One kind being used for wet-type dual-clutch gearbox pressure fault diagnostic method | |
| US8460155B2 (en) | Control apparatus for twin-clutch automatic transmission | |
| US9611934B2 (en) | Shift control apparatus for automatic transmission | |
| CN109099154B (en) | Gear control method and device of double-clutch transmission | |
| CN105240515A (en) | Rotating speed synchronization control method of wet double-clutch transmission | |
| US20090118088A1 (en) | Surrogate Engine Speed Signal for Controlling a Dual Clutch Powershift Transmission | |
| CN101280844A (en) | Variable discharge solenoid valve recovery system | |
| CN109595336B (en) | Torque pressure adjusting method for clutch of wet-type double-clutch automatic transmission | |
| CN107782466B (en) | System and method for diagnosing and processing rationality fault of oil temperature sensor | |
| CN104343959A (en) | Hydraulic control device for dual-clutch automatic transmission | |
| CN110701213B (en) | Clutch fault diagnosis method and device, electronic equipment and storage medium | |
| JP5144019B2 (en) | Twin clutch type automatic transmission and control method thereof | |
| US9845841B2 (en) | Procedure for operating a transmission device | |
| US9500262B2 (en) | Procedure for operating a transmission device | |
| US9810317B2 (en) | Method for controlling driving of vehicle | |
| RU2623056C2 (en) | Device and method for evaluating input torque of dual clutch transmission | |
| CN106224535B (en) | The control method of wet-type dual-clutch gearbox | |
| JP2013053732A (en) | Automatic transmission | |
| CN110566663B (en) | Method for detecting signal clamping stagnation fault of shifting fork position sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 No. 669 Shixin Road, Taohua Industrial Park, Hefei City, Anhui Province Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |