CN114165585A - Control method and system for failure of oil temperature sensor and storage medium - Google Patents
Control method and system for failure of oil temperature sensor and storage medium Download PDFInfo
- Publication number
- CN114165585A CN114165585A CN202111522599.1A CN202111522599A CN114165585A CN 114165585 A CN114165585 A CN 114165585A CN 202111522599 A CN202111522599 A CN 202111522599A CN 114165585 A CN114165585 A CN 114165585A
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- Prior art keywords
- oil temperature
- temperature sensor
- control
- failure
- clutch
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 239000002826 coolant Substances 0.000 claims abstract description 7
- 238000006467 substitution reaction Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Images
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
- 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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/68—Inputs being a function of gearing status
- F16H59/72—Inputs being a function of gearing status dependent on oil characteristics, e.g. temperature, viscosity
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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
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
- F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
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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
- F16H2061/1224—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
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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
- F16H2061/1232—Bringing the control into a predefined state, e.g. giving priority to particular actuators or gear ratios
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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
- F16H2061/1284—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 sensor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a control method and a control system for failure of an oil temperature sensor and a storage medium, and relates to the technical field of sensor failure control. The method comprises the following specific steps: judging whether the oil temperature sensor has a fault; if the fault occurs, calculating a transmission oil temperature substitute value as an oil temperature input of clutch control, wherein the transmission oil temperature substitute value is equal to the temperature and offset of engine coolant; and obtaining a clutch target pressure and a control solenoid valve current according to the oil temperature substitute value. The invention can obtain an approximate value close to the real oil temperature when the oil temperature sensor of the transmission breaks down, and can not cause larger deviation to the control of the current of the electromagnetic valve, thereby obtaining better clutch control pressure and solving the problem of the reduction of the comfort and the safety of a vehicle caused by the failure of the oil temperature sensor.
Description
Technical Field
The invention relates to the technical field of sensor failure control, in particular to a method and a system for controlling failure of an oil temperature sensor and a storage medium.
Background
In a vehicle provided with a Continuously Variable Transmission (CVT), the control current of a clutch electromagnetic valve is calculated by looking up a table according to the oil temperature in the clutch combination process, so that the aim that the clutch can be quickly combined and has no impact under different oil temperatures is fulfilled. However, when the oil temperature sensor fails, the read oil temperature value is greatly different from the real oil temperature, so that the control current of the clutch is inaccurate, the gear shifting and shaking phenomenon of the vehicle is easily caused, and the riding comfort and the experience of people in the vehicle are influenced.
When the oil temperature sensor fails, the conventional technology uses a fixed set value for an oil temperature substitute value, and the method has the defects that when the actual oil temperature is greatly deviated from the set value, the control of all electromagnetic valves generates large control deviation, and large gear shifting impact is caused to influence the comfort and safety of a vehicle, so that the technology which can still ensure the comfort and safety of the vehicle in the case of the failure of the oil temperature sensor of the transmission has strong research significance and application value.
Disclosure of Invention
In view of the above, the present invention provides a method, a system and a storage medium for controlling failure of an oil temperature sensor, which can still ensure the comfort and safety of vehicle driving under the condition that the oil temperature sensor of a transmission fails.
In order to achieve the purpose, the invention adopts the following technical scheme: on one hand, the method for controlling the failure of the oil temperature sensor comprises the following specific steps:
judging whether the oil temperature sensor has a fault;
if the fault occurs, calculating a transmission oil temperature substitute value as an oil temperature input of clutch control, wherein the transmission oil temperature substitute value is equal to the temperature and offset of engine coolant;
and obtaining a clutch target pressure and a control solenoid valve current according to the oil temperature substitute value.
By adopting the technical scheme, the method has the following beneficial technical effects: an approximate value close to the real oil temperature is obtained, and the control on the current of the electromagnetic valve cannot cause larger deviation, so that better clutch control pressure is obtained.
Optionally, the offset is calculated by: and taking the temperature of the engine coolant as input, and retrieving an offset calibration value at the corresponding temperature by adopting a linear difference algorithm so as to obtain the corresponding temperature offset.
Optionally, the target clutch pressure is controlled according to the current of the control solenoid valve, so as to complete the working process of the clutch.
On the other hand, the control system for the failure of the oil temperature sensor comprises an oil temperature fault judgment module, an oil temperature substitution module and a data acquisition module which are sequentially connected; wherein,
the oil temperature fault judging module is used for judging whether the oil temperature sensor has a fault or not;
the oil temperature substitution module is used for calculating a transmission oil temperature substitution value as oil temperature input for clutch control;
and the data acquisition module is used for acquiring the clutch target pressure and the control solenoid valve current according to the oil temperature substitute value.
Finally, a computer storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for controlling a failure of an oil temperature sensor.
Compared with the prior art, the technical scheme shows that the invention provides the control method, the system and the storage medium for the failure of the oil temperature sensor, and can obtain the approximate value close to the real oil temperature when the oil temperature sensor of the transmission fails, and the control of the current of the electromagnetic valve cannot cause larger deviation, so that better clutch control pressure is obtained, and the problems of vehicle comfort and safety reduction caused by the failure of the oil temperature sensor are solved. The invention improves the stability and the gear shifting quality of the vehicle system and effectively ensures the comfort and the safety of the vehicle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a block diagram of the system of the present invention;
FIG. 3 is a fault data graph prior to implementation of the present invention;
FIG. 4 is a graph of fault data after implementation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment 1 of the invention discloses a control method for failure of an oil temperature sensor, which comprises the following specific steps as shown in figure 1:
s1, judging whether the oil temperature sensor has a fault;
s2, if a fault occurs, calculating a transmission oil temperature substitute value as oil temperature input of clutch control, wherein the transmission oil temperature substitute value is equal to the engine coolant temperature plus the offset;
and S3, obtaining the clutch target pressure and the control solenoid valve current according to the oil temperature substitute value.
Further, when the TCM (automatic transmission control module) detects the following oil temperature signal, it is considered that a fault occurs: firstly, the oil temperature signal voltage is too high/too low; ② the oil temperature signal has sudden change.
Further, the offset is calculated as follows: and taking the temperature of the engine coolant as input, and retrieving an offset calibration value at the corresponding temperature by adopting a linear difference algorithm so as to obtain the corresponding temperature offset.
And further, controlling the target pressure of the clutch according to the current of the control electromagnetic valve so as to finish the working process of the clutch. Clutch target pressure is equal to clutch target oil filling time and opening of the electromagnetic valve; wherein, the target oil filling time also needs to use the oil temperature linear difference algorithm table look-up to obtain the corresponding calibration quantity. Therefore, accurate control current of the clutch electromagnetic valve is obtained, besides reducing gear shifting impact of the clutch, accurate control can be realized on the control of other electromagnetic valves, the control deviation of the system is reduced, and the stability of the CVT control system is guaranteed.
FIG. 3 is a fault data diagram prior to the implementation of the present invention; before implementation, when the signal of the oil temperature sensor changes suddenly and the signal does not take replacement measures, serious impact can be generated during gear shifting (the impact is judged according to the rotating speed amplitude of the driving wheel); as shown in fig. 4, a fault data diagram after the implementation of the present invention is shown, after the implementation: when the signal of the oil temperature sensor changes suddenly, the temperature of the cooling liquid is used for controlling the oil temperature, the jumping amplitude of the driving wheel is obviously reduced during gear shifting, and the gear shifting impact feeling is optimized. Obviously, the failure control of the oil temperature sensor by adopting the method can still ensure the comfort and safety of vehicle running under the condition that the oil temperature sensor of the transmission fails.
The embodiment 2 of the invention discloses a control system for failure of an oil temperature sensor, which comprises an oil temperature fault judgment module, an oil temperature substitution module and a data acquisition module which are sequentially connected, as shown in fig. 2; wherein,
the oil temperature fault judging module is used for judging whether the oil temperature sensor has a fault or not;
the oil temperature substitution module is used for calculating a transmission oil temperature substitution value as oil temperature input of clutch control;
and the data acquisition module is used for acquiring the target clutch pressure and the current of the control solenoid valve according to the oil temperature substitute value.
Finally, a computer storage medium is provided, on which a computer program is stored, which, when being executed by a processor, implements the steps of a method for controlling a failure of an oil temperature sensor.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A control method for failure of an oil temperature sensor is characterized by comprising the following specific steps:
judging whether the oil temperature sensor has a fault;
if the fault occurs, calculating a transmission oil temperature substitute value as an oil temperature input of clutch control, wherein the transmission oil temperature substitute value is equal to the temperature and offset of engine coolant;
and obtaining a clutch target pressure and a control solenoid valve current according to the transmission oil temperature substitute value.
2. The method for controlling the failure of the oil temperature sensor according to claim 1, wherein the offset is calculated by: and taking the temperature of the engine coolant as input, and retrieving an offset calibration value at the corresponding temperature by adopting a linear difference algorithm so as to obtain the corresponding temperature offset.
3. The method for controlling the failure of the oil temperature sensor according to claim 1, wherein the clutch target pressure is controlled according to the control solenoid current to complete the working process of the clutch.
4. A control system for failure of an oil temperature sensor is characterized by comprising an oil temperature fault judgment module, an oil temperature substitution module and a data acquisition module which are sequentially connected; wherein,
the oil temperature fault judging module is used for judging whether the oil temperature sensor has a fault or not;
the oil temperature substitution module is used for calculating a transmission oil temperature substitution value as oil temperature input for clutch control;
and the data acquisition module is used for acquiring the target pressure of the clutch and the current of the control solenoid valve according to the oil temperature substitute value of the transmission.
5. A computer storage medium, characterized in that the computer storage medium has stored thereon a computer program which, when being executed by a processor, implements the steps of a method of controlling a failure of an oil temperature sensor according to any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111522599.1A CN114165585A (en) | 2021-12-13 | 2021-12-13 | Control method and system for failure of oil temperature sensor and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111522599.1A CN114165585A (en) | 2021-12-13 | 2021-12-13 | Control method and system for failure of oil temperature sensor and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114165585A true CN114165585A (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111522599.1A Pending CN114165585A (en) | 2021-12-13 | 2021-12-13 | Control method and system for failure of oil temperature sensor and storage medium |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05209681A (en) * | 1992-01-31 | 1993-08-20 | Mazda Motor Corp | Oil pressure control device for automatic transmission |
| CN1135602A (en) * | 1995-02-13 | 1996-11-13 | 奔驰公司 | Device for testing temp. of gear-shifting box |
| CN1926361A (en) * | 2004-01-07 | 2007-03-07 | 克菲科公司 | Method for detecting fault of oil temperature sensor for automatic transmission |
| JP2012052633A (en) * | 2010-09-03 | 2012-03-15 | Suzuki Motor Corp | Failure determining device of oil temperature sensor |
| CN103277428A (en) * | 2013-05-31 | 2013-09-04 | 安徽江淮汽车股份有限公司 | Wet dual-clutch automatic transmission and precharging pressure control method thereof |
| CN103982644A (en) * | 2014-06-03 | 2014-08-13 | 盛瑞传动股份有限公司 | Method and system for measuring oil temperature of automatic gearbox |
| CN105179678A (en) * | 2015-08-20 | 2015-12-23 | 安徽江淮汽车股份有限公司 | Failure handling method and system for sensor of automatic double-clutch gearbox |
| CN107782466A (en) * | 2016-08-31 | 2018-03-09 | 联合汽车电子有限公司 | The reasonability fault diagnosis and processing system and method for oil temperature sensor |
-
2021
- 2021-12-13 CN CN202111522599.1A patent/CN114165585A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05209681A (en) * | 1992-01-31 | 1993-08-20 | Mazda Motor Corp | Oil pressure control device for automatic transmission |
| CN1135602A (en) * | 1995-02-13 | 1996-11-13 | 奔驰公司 | Device for testing temp. of gear-shifting box |
| CN1926361A (en) * | 2004-01-07 | 2007-03-07 | 克菲科公司 | Method for detecting fault of oil temperature sensor for automatic transmission |
| JP2012052633A (en) * | 2010-09-03 | 2012-03-15 | Suzuki Motor Corp | Failure determining device of oil temperature sensor |
| CN103277428A (en) * | 2013-05-31 | 2013-09-04 | 安徽江淮汽车股份有限公司 | Wet dual-clutch automatic transmission and precharging pressure control method thereof |
| CN103982644A (en) * | 2014-06-03 | 2014-08-13 | 盛瑞传动股份有限公司 | Method and system for measuring oil temperature of automatic gearbox |
| CN105179678A (en) * | 2015-08-20 | 2015-12-23 | 安徽江淮汽车股份有限公司 | Failure handling method and system for sensor of automatic double-clutch gearbox |
| CN107782466A (en) * | 2016-08-31 | 2018-03-09 | 联合汽车电子有限公司 | The reasonability fault diagnosis and processing system and method for oil temperature sensor |
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Application publication date: 20220311 |