CN111828612B - High-power AT clutch oil charge control method based on ambient temperature - Google Patents
High-power AT clutch oil charge control method based on ambient temperature Download PDFInfo
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- CN111828612B CN111828612B CN202010504614.9A CN202010504614A CN111828612B CN 111828612 B CN111828612 B CN 111828612B CN 202010504614 A CN202010504614 A CN 202010504614A CN 111828612 B CN111828612 B CN 111828612B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000011217 control strategy Methods 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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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
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
- F16D48/066—Control of fluid pressure, e.g. using an accumulator
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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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/304—Signal inputs from the clutch
- F16D2500/30404—Clutch temperature
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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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/512—Relating to the driver
- F16D2500/5122—Improve passengers comfort
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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
- F16H2061/062—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means for controlling filling of clutches or brake servos, e.g. fill time, fill level or pressure during filling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses an oil charge control method of a high-power AT clutch based on ambient temperature, which comprises the following steps that firstly, an electronic control unit of an automatic transmission respectively collects the initial ambient temperature and the initial AT oil temperature of a vehicle; then, the electronic control unit respectively compares the environmental temperature and the AT oil temperature of the vehicle in the first step with preset low-temperature thresholds to judge: when AT least one of the ambient temperature and the AT oil temperature is higher than or equal to the low-temperature threshold value, the electronic control unit controls the clutch to enter a normal-temperature mode; when the ambient temperature and the AT oil temperature are both lower than a preset low-temperature threshold value, the electronic control unit controls the clutch to enter a low-temperature mode; the invention can improve the gear shifting comfort of the high-power AT vehicle in the extremely low temperature environment.
Description
Technical Field
The invention belongs to the technical field of oil charge control of clutches of automatic transmissions, and particularly relates to an oil charge control method of a high-power AT clutch based on ambient temperature.
Background
AT (hydraulic mechanical automatic transmission) has the advantages of smooth starting, buffer and vibration reduction, automatic adaptation to external load, improvement of vehicle dynamic property and the like, so that the AT is particularly suitable for heavy vehicles with loads, cross-country or special purposes, and therefore high-power AT comes up AT the end of the journey. Currently, an AT with a nominal input power of greater than 200kW is generally defined in the industry as a high-power AT.
The vehicle loaded with the high-power AT has complex running working conditions and wider environmental temperature adaptation range (-43-55 ℃), the characteristics of the clutch sealing material can generate nonlinear sudden change under an extremely low temperature environment, the mechanical characteristics of the clutch sealing material are gradually recovered along with the rise of the temperature AT oil temperature, and the oil charging time calibration of the traditional clutch based on the AT oil temperature can not meet the requirement of gear shifting comfort.
Disclosure of Invention
In view of the above, the invention provides an oil charge control method for a high-power AT clutch based on ambient temperature, which can improve the shift comfort of a high-power AT vehicle running in an extremely low temperature environment.
The invention is realized by the following technical scheme:
a high-power AT clutch oil charge control method based on ambient temperature specifically comprises the following steps:
firstly, respectively acquiring initial ambient temperature and AT oil temperature of a vehicle by an electronic control unit of an automatic transmission;
and secondly, the electronic control unit respectively compares the ambient temperature and the AT oil temperature of the vehicle in the first step with a preset low-temperature threshold value to judge:
when AT least one of the environment temperature and the AT oil temperature is higher than or equal to the low-temperature threshold value, the electronic control unit controls the clutch to enter a normal-temperature mode, namely, the clutch oil charging control adopts a normal-temperature control strategy;
when the ambient temperature and the AT oil temperature are both lower than the preset low-temperature threshold value, the electronic control unit controls the clutch to enter a low-temperature mode, namely the clutch oil filling control adopts a low-temperature control strategy, and the low-temperature control strategy is that the clutch oil filling time is shorter than the normal-temperature control strategy oil filling time by a set value;
step three, if the electronic control unit controls the clutch to enter the normal temperature mode in the step two, the normal temperature mode is kept unchanged;
if the electronic control unit controls the clutch to enter the low-temperature mode in the second step, the electronic control unit collects real-time AT oil temperature, and the AT oil temperature gradually rises along with the use of the AT; when the AT oil temperature is higher than or equal to a preset high-temperature threshold value, the electronic control unit starts timing, and when the timing time is smaller than or equal to a set time threshold value, the electronic control unit controls the clutch to keep a low-temperature mode; when the timing time is greater than a set time threshold value, the electronic control unit controls the clutch to exit the low-temperature mode, simultaneously enter the normal-temperature mode, and keep the normal-temperature mode unchanged; wherein the high temperature threshold is greater than the low temperature threshold.
Further, in the first step, the electronic control unit of the automatic transmission acquires the ambient temperature of the vehicle through the CAN communication bus, and acquires the AT oil temperature through the temperature sensor.
Furthermore, the low-temperature control strategy is that the set value of the clutch oil filling time which is less than the oil filling time of the normal-temperature control strategy is 10 ms.
Has the advantages that: according to the invention, a low-temperature control strategy is adopted in a low-temperature environment, the clutch enters a low-temperature mode, the oil filling time of the clutch is reduced, and the gear shifting comfort of the high-power AT vehicle in the running process in an extreme low-temperature environment can be improved; when the AT oil temperature rises, the clutch exits the low-temperature mode and returns to the normal-temperature mode; the invention is suitable for all vehicles with automatic transmissions and has important significance for improving the gear shifting comfort of the vehicles.
Drawings
Fig. 1 is a working principle diagram of the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides an oil charge control method for a high-power AT clutch based on ambient temperature, which comprises the following specific steps with reference to the attached drawing 1:
firstly, an electronic control unit (TCU) (namely an AT controller) of the automatic transmission acquires the ambient temperature of a vehicle through a CAN communication bus and acquires the temperature of the AT oil through a temperature sensor;
and secondly, the electronic control unit respectively compares the ambient temperature and the AT oil temperature of the vehicle with a preset low-temperature threshold value for judgment:
when AT least one of the environment temperature and the AT oil temperature is higher than or equal to the low-temperature threshold value, the electronic control unit controls the clutch to enter a normal-temperature mode, namely, a normal-temperature control strategy is adopted for clutch oil filling control, and the normal-temperature control strategy is that the clutch oil filling time is a set value;
when the ambient temperature and the AT oil temperature are both lower than the preset low-temperature threshold value, the electronic control unit controls the clutch to enter a low-temperature mode, namely the clutch oil filling control adopts a low-temperature control strategy, wherein the low-temperature control strategy is that the clutch oil filling time is 10ms shorter than the normal-temperature control strategy oil filling time;
step three, if the electronic control unit controls the clutch to enter the normal temperature mode in the step two, the normal temperature mode is kept unchanged;
if the electronic control unit controls the clutch to enter the low-temperature mode in the second step, the electronic control unit collects real-time AT oil temperature, and the AT oil temperature gradually rises along with the use of the AT; when the AT oil temperature is higher than or equal to a preset high-temperature threshold (the high-temperature threshold is larger than a low-temperature threshold), the electronic control unit starts timing, and when the timing time is smaller than or equal to the set time threshold, the electronic control unit controls the clutch to keep a low-temperature mode; when the timing time is greater than the set time threshold value, the electronic control unit controls the clutch to exit the low-temperature mode, simultaneously enter the normal-temperature mode, and keep the normal-temperature mode unchanged.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A high-power AT clutch oil charge control method based on ambient temperature is characterized by comprising the following specific steps:
firstly, respectively acquiring initial ambient temperature and AT oil temperature of a vehicle by an electronic control unit of an automatic transmission;
and secondly, the electronic control unit respectively compares the ambient temperature and the AT oil temperature of the vehicle in the first step with a preset low-temperature threshold value:
when AT least one of the environment temperature and the AT oil temperature is higher than or equal to the low-temperature threshold value, the electronic control unit controls the clutch to enter a normal-temperature mode, namely, the clutch oil charging control adopts a normal-temperature control strategy;
when the ambient temperature and the AT oil temperature are both lower than the preset low-temperature threshold value, the electronic control unit controls the clutch to enter a low-temperature mode, namely the clutch oil filling control adopts a low-temperature control strategy, and the low-temperature control strategy is that the clutch oil filling time is shorter than the normal-temperature control strategy oil filling time by a set value;
step three, if the electronic control unit controls the clutch to enter the normal temperature mode in the step two, the normal temperature mode is kept unchanged;
if the electronic control unit controls the clutch to enter the low-temperature mode in the second step, the electronic control unit collects real-time AT oil temperature, and the AT oil temperature gradually rises along with the use of the AT; when the AT oil temperature is higher than or equal to a preset high-temperature threshold value, the electronic control unit starts timing, and when the timing time is smaller than or equal to a set time threshold value, the electronic control unit controls the clutch to keep a low-temperature mode; when the timing time is greater than a set time threshold value, the electronic control unit controls the clutch to exit the low-temperature mode, simultaneously enter the normal-temperature mode, and keep the normal-temperature mode unchanged; wherein the high temperature threshold is greater than the low temperature threshold.
2. The ambient temperature-based high-power AT clutch oil charge control method according to claim 1, wherein in the first step, the electronic control unit of the automatic transmission collects the ambient temperature of the vehicle through a CAN communication bus and collects the AT oil temperature through a temperature sensor.
3. The ambient temperature-based oil charge control method for the high-power AT clutch, according to claim 1, wherein the low-temperature control strategy is that the set value for the clutch oil charge time less than the normal-temperature control strategy oil charge time is 10 ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010504614.9A CN111828612B (en) | 2020-06-05 | 2020-06-05 | High-power AT clutch oil charge control method based on ambient temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010504614.9A CN111828612B (en) | 2020-06-05 | 2020-06-05 | High-power AT clutch oil charge control method based on ambient temperature |
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| Publication Number | Publication Date |
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| CN111828612A CN111828612A (en) | 2020-10-27 |
| CN111828612B true CN111828612B (en) | 2021-05-28 |
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| CN202010504614.9A Active CN111828612B (en) | 2020-06-05 | 2020-06-05 | High-power AT clutch oil charge control method based on ambient temperature |
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| CN111828612A (en) | 2020-10-27 |
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