CN112283327A - Gearbox oil temperature control method, device and equipment and readable storage medium - Google Patents
Gearbox oil temperature control method, device and equipment and readable storage medium Download PDFInfo
- Publication number
- CN112283327A CN112283327A CN202010990051.9A CN202010990051A CN112283327A CN 112283327 A CN112283327 A CN 112283327A CN 202010990051 A CN202010990051 A CN 202010990051A CN 112283327 A CN112283327 A CN 112283327A
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- oil temperature
- temperature
- gearbox
- temperature interval
- interval
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
Abstract
The invention provides a method, a device and equipment for controlling the oil temperature of a gearbox and a readable storage medium. The method comprises the following steps: acquiring the oil temperature of a gearbox, and determining a temperature interval where the oil temperature of the gearbox is located; and executing a corresponding control strategy based on the temperature interval where the gearbox oil temperature is located so as to reduce the gearbox oil temperature. According to the invention, based on the temperature interval of the oil temperature of the gearbox, the corresponding control strategy is selected, and the selected control strategy is executed to reduce the oil temperature of the gearbox, so that the oil temperature of the gearbox is controlled in a reasonable range, and the condition that the clutch is damaged due to overhigh oil temperature of the gearbox is avoided.
Description
Technical Field
The invention relates to the technical field of automobile transmissions, in particular to a transmission oil temperature control method, device and equipment and a readable storage medium.
Background
The wet type double clutch automatic gearbox comprises two input shafts, wherein one input shaft controls odd-numbered gears, the other input shaft controls even-numbered gears, when in gear shifting, one clutch loses power of engaged gears, and the other clutch enables pre-engaged gears to obtain power. Continuous power transmission is realized through alternate work of the two clutches, and in the alternate process of the two clutches, impact can be reduced by controlling torque and friction transmitted by the two clutches, so that the gear shifting smoothness and comfort are improved. When the clutch has large transmission torque and is worn for a long time, the temperature of the clutch rises due to the generation of a large amount of heat, so that the clutch is ablated, the failure of a gearbox is caused, and great threat is brought to the safe running of an automobile.
In order to reduce the temperature of the clutch, in the prior art, the gearbox oil is sent to the clutch through a cooling oil pump, the gearbox oil is thrown to a gearbox shell through the stirring and splashing actions of a gear and a clutch driving disc, and the gearbox shell performs heat exchange with air to dissipate heat into the air. When the temperature of the transmission oil is higher than a certain value, the temperature of the clutch may exceed the maximum temperature which the clutch can bear, and the clutch may be damaged.
Disclosure of Invention
The invention mainly aims to provide a method, a device and equipment for controlling the oil temperature of a gearbox and a readable storage medium, and aims to solve the problem that a clutch is damaged when the temperature of the gearbox oil is greater than a certain value in the prior art.
In a first aspect, the present invention provides a transmission oil temperature control method, including:
acquiring the oil temperature of a gearbox, and determining a temperature interval where the oil temperature of the gearbox is located;
and executing a corresponding control strategy based on the temperature interval where the gearbox oil temperature is located so as to reduce the gearbox oil temperature.
In a second aspect, the present invention also provides a transmission oil temperature control device, including:
the determining module is used for acquiring the oil temperature of the gearbox and determining the temperature interval of the oil temperature of the gearbox;
and the execution module is used for executing a corresponding control strategy based on the temperature interval where the gearbox oil temperature is located so as to reduce the gearbox oil temperature.
In a third aspect, the present invention further provides a transmission oil temperature control apparatus, which includes a processor, a memory, and a transmission oil temperature control program stored on the memory and executable by the processor, wherein the transmission oil temperature control program, when executed by the processor, implements the steps of the transmission oil temperature control method as described above.
In a fourth aspect, the present invention further provides a readable storage medium, on which a transmission oil temperature control program is stored, wherein when the transmission oil temperature control program is executed by a processor, the steps of the transmission oil temperature control method as described above are implemented.
In the invention, the oil temperature of the gearbox is obtained, and the temperature interval of the oil temperature of the gearbox is determined; and executing a corresponding control strategy based on the temperature interval where the gearbox oil temperature is located so as to reduce the gearbox oil temperature. According to the invention, based on the temperature interval of the oil temperature of the gearbox, the corresponding control strategy is selected, and the selected control strategy is executed to reduce the oil temperature of the gearbox, so that the oil temperature of the gearbox is controlled in a reasonable range, and the condition that the clutch is damaged due to overhigh oil temperature of the gearbox is avoided.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of a transmission oil temperature control device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a transmission oil temperature control method according to an embodiment of the present invention;
fig. 3 is a functional module schematic diagram of an embodiment of a transmission oil temperature control device according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a first aspect, an embodiment of the present invention provides a transmission oil temperature control apparatus.
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a transmission oil temperature control device according to an embodiment of the present invention. In an embodiment of the present invention, the transmission oil temperature control device may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WI-FI interface, WI-FI interface); the memory 1005 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
With continued reference to FIG. 1, the memory 1005 of FIG. 1, which is one type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a transmission oil temperature control program. The processor 1001 may call a transmission oil temperature control program stored in the memory 1005, and execute the transmission oil temperature control method provided by the embodiment of the present invention.
In a second aspect, an embodiment of the present invention provides a method for controlling oil temperature of a transmission.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a method for controlling an oil temperature of a transmission according to the present invention. As shown in fig. 2, the method for controlling the oil temperature of the transmission includes:
step S10, acquiring the oil temperature of the gearbox, and determining the temperature interval of the oil temperature of the gearbox;
in this embodiment, the temperature of the transmission oil is obtained by the temperature sensor, and then the temperature interval in which the transmission oil temperature is located is determined. A plurality of temperature intervals may be preset according to actual conditions, for example: the range of the first temperature interval is more than 90 ℃ and less than or equal to 110 ℃, the range of the second temperature interval is more than 110 ℃ and less than or equal to 120 ℃, the range of the third temperature interval is more than 120 ℃ and less than or equal to 130 ℃, the range of the fourth temperature interval is more than 130 ℃ and less than or equal to 140 ℃, and the range of the fifth temperature interval is more than 140 ℃. The boundary value of each temperature interval can be flexibly set according to the actual situation, and is not limited herein.
And step S20, executing a corresponding control strategy based on the temperature interval where the gearbox oil temperature is located, so as to reduce the gearbox oil temperature.
In this embodiment, if the acquired transmission oil temperature is in a first temperature interval, a first control strategy corresponding to the first temperature interval is executed to reduce the transmission oil temperature; if the acquired gearbox oil temperature is in a second temperature interval, executing a second control strategy corresponding to the second temperature interval so as to reduce the gearbox oil temperature; similarly, when the oil temperature of the gearbox is in other temperature intervals, executing control strategies corresponding to the other temperature intervals so as to reduce the oil temperature of the gearbox.
Further, in an embodiment, the step of executing the control strategy corresponding to the temperature interval includes:
and when the temperature interval of the oil temperature of the gearbox is a first temperature interval, starting a cooling fan to increase cold air entering the engine compartment.
In this embodiment, when the temperature range of the transmission oil temperature is the first temperature range, that is, the transmission oil temperature is greater than 90 ℃ and less than or equal to 110 ℃, the TCU (transmission controller) sends an instruction to an ECU (Electronic Control Unit, also called "traveling computer" or "vehicle-mounted computer"), the ECU is required to turn on the cooling fan, and adjust the rotation speed of the cooling fan to the highest gear, the rotation speed of the cooling fan is increased, and the cold air entering the engine compartment can be increased, so that the heat exchange speed of the transmission is increased, and the temperature of the transmission oil is reduced. The gear shifting performance of the gearbox cannot be reduced by the aid of the measures, driving experience of a driver cannot be influenced, and the gear shifting performance is easy to realize.
If the heat dissipation efficiency of the cooling fan cannot keep up with the heating speed of the clutch, the temperature of the transmission oil can be continuously increased, and when the temperature is increased to a certain value, the control strategy needs to be changed so as to improve the heat dissipation efficiency. Further, in an embodiment, the step of executing the control strategy corresponding to the temperature interval includes:
and when the temperature interval of the oil temperature of the gearbox is a second temperature interval, starting a negative accelerator gradient function to reduce the gear shifting frequency, wherein the lower limit value of the second temperature interval is greater than the upper limit value of the first temperature interval.
In this embodiment, when the oil temperature of the transmission is continuously increased until the oil temperature of the transmission is greater than 110 ℃ and less than or equal to 120 ℃, the negative accelerator gradient function is turned on to reduce the frequency of gear shifting, thereby reducing the oil temperature of the transmission.
The cooling principle is as follows:
normally, the accelerator pedal is retracted to cause an upshift, which is determined by the automatic control map. If the vehicle then accelerates immediately (e.g., travels around an obstacle), the system will go back into the original gear. In order to avoid such "hunting shifts", or to exploit the braking effect of the engine when driving downhill, it is necessary to activate a time-limited upshift prevention when rapidly retracting the throttle or during braking. To achieve this function, the accelerator pedal gradient needs to be checked.
The gear shifting performance of the gearbox cannot be reduced by the aid of the measures, but the engine is easier to be in a low gear range due to the fact that gear shifting is delayed, the rotating speed of the engine is high, and the driving experience of a driver can be slightly influenced.
If the strategy of starting the negative accelerator gradient function still cannot reduce the oil temperature of the gearbox, and the temperature of the gearbox oil is continuously increased along with the continuous heat generation of the clutch, the control strategy needs to be continuously changed to reduce the oil temperature of the gearbox. Further, in an embodiment, the step of executing the control strategy corresponding to the temperature interval further includes:
and when the temperature interval of the oil temperature of the gearbox is a third temperature interval, reducing the maximum torque of the engine to reduce the load of the clutch, wherein the lower limit value of the third temperature interval is greater than the upper limit value of the second temperature interval.
In this embodiment, when the oil temperature of the transmission is continuously increased until the oil temperature of the transmission is greater than 120 ℃ and less than or equal to 130 ℃, the TCU sends a torque limiting request to the ECU to reduce the maximum torque of the engine, so as to reduce the load of the clutch, reduce the heat productivity of the clutch, and further reduce the oil temperature of the transmission. Wherein, the maximum torque of the engine can be adjusted to 50 percent to 70 percent of the original maximum torque. For example, the maximum torque of the engine is 200N · m, and the engine maximum torque after the engine is turned down is 120N · m. Limiting the maximum torque appropriately may meet the basic dynamic requirements of the vehicle, but may reduce the dynamic properties and may affect the driving experience of the driver.
Further, in an embodiment, when the temperature interval in which the oil temperature of the transmission is located is a third temperature interval, the step of reducing the maximum torque of the engine includes:
when the temperature interval of the oil temperature of the gearbox is a third temperature interval, acquiring a horizontal inclination angle of the vehicle; and when the horizontal inclination angle is smaller than a preset angle, reducing the maximum torque of the engine.
In this embodiment, when the temperature interval in which the oil temperature of the transmission is located is the third temperature interval, the adopted control strategy is to reduce the maximum torque of the engine, but the reduction of the maximum torque of the engine reduces the dynamic performance of the automobile, and when the automobile is located in an uphill road section and the slope of the road section is large, the dynamic performance of the automobile is reduced, which may seriously affect the experience of the driver on the shelf or even the driving safety. In order to ensure the driving safety, when the temperature interval of the oil temperature of the gearbox is a third temperature interval, firstly, the horizontal inclination angle of the vehicle is obtained. It is easy to understand that the larger the horizontal inclination angle of the vehicle, i.e. the included angle between the vehicle and the horizontal plane, the larger the slope of the road section where the vehicle is located, and the higher the requirement of the vehicle for power when climbing the slope. Therefore, the maximum torque of the engine can be adjusted down only when the gradient of the road section on which the vehicle is located is small. For example, it is found from practical experiments that when the road gradient is less than 20 °, the requirement for the power of the vehicle is not high, the preset angle may be set to 20 °, and the maximum torque of the engine is turned down only when the horizontal inclination angle of the vehicle is detected to be less than 20 °. Namely, on the premise of ensuring the driving safety, the oil temperature of the gearbox is reduced in a torque-limiting mode.
If the oil temperature of the gearbox still cannot be reduced in a torque limiting mode and the oil temperature of the gearbox is continuously increased, the control strategy is continuously changed to reduce the oil temperature of the gearbox. Further, in an embodiment, the step of executing the control strategy corresponding to the temperature interval further includes:
and when the temperature interval of the oil temperature of the gearbox is a fourth temperature interval, switching the gear shifting mode from unpowered interrupted gear shifting to power interrupted gear shifting, wherein the lower limit value of the fourth temperature interval is larger than the upper limit value of the third temperature interval.
In this embodiment, when the oil temperature of the transmission is continuously increased until the oil temperature of the transmission is greater than 130 ℃ and less than or equal to 140 ℃, the shift mode is changed, and the power-off shift mode is switched from the power-off shift mode to the power-off shift mode. Under the power interruption gear shifting mode, the clutch is only in an opening state and a connection state, and the clutch has no sliding wear, so that the heating of the clutch is reduced, and the oil temperature of the gearbox is reduced. However, this method causes shift shock and reduces driving comfort.
If the oil temperature of the gearbox still cannot be reduced through the strategy of switching the gear shifting mode, and the oil temperature of the gearbox is continuously increased, the control strategy is continuously changed to reduce the oil temperature of the gearbox. Further, in an embodiment, the step of executing the control strategy corresponding to the temperature interval further includes:
and when the temperature interval of the oil temperature of the gearbox is a fifth temperature interval, controlling the clutch to be fully opened, wherein the lower limit value of the fifth temperature interval is greater than the upper limit value of the fourth temperature interval.
In the embodiment, when the oil temperature of the gearbox is more than 140 ℃, the clutch is controlled to be completely opened so as to be protected. At this time, the clutch cannot work, so that no power is transmitted, but the clutch does not generate heat any more, so that the oil temperature of the gearbox is reduced.
In the embodiment, the oil temperature of the gearbox is obtained, and the temperature interval of the oil temperature of the gearbox is determined; and executing a corresponding control strategy based on the temperature interval where the gearbox oil temperature is located so as to reduce the gearbox oil temperature. According to the control method and the control device, the corresponding control strategy is selected based on the temperature interval where the gearbox oil temperature is located, the selected control strategy is executed, the gearbox oil temperature is reduced, the gearbox oil temperature is controlled in a reasonable range, and the condition that the clutch is damaged due to the fact that the gearbox oil temperature is too high is avoided.
In a third aspect, an embodiment of the present invention further provides a transmission oil temperature control device.
Referring to fig. 3, fig. 3 is a functional module schematic diagram of an embodiment of a transmission oil temperature control device of the present invention. As shown in fig. 3, in an embodiment, the transmission oil temperature control device includes:
the determining module 10 is configured to obtain a transmission oil temperature and determine a temperature interval in which the transmission oil temperature is located;
and the execution module 20 is configured to execute a corresponding control strategy based on a temperature interval where the transmission oil temperature is located, so as to reduce the transmission oil temperature.
Further, in an embodiment, the execution module 20 is configured to:
and when the temperature interval of the oil temperature of the gearbox is a first temperature interval, starting a cooling fan to increase cold air entering the engine compartment.
Further, in an embodiment, the execution module 20 is configured to:
and when the temperature interval of the oil temperature of the gearbox is a second temperature interval, starting a negative accelerator gradient function to reduce the gear shifting frequency, wherein the lower limit value of the second temperature interval is greater than the upper limit value of the first temperature interval.
Further, in an embodiment, the execution module 20 is configured to:
and when the temperature interval of the oil temperature of the gearbox is a third temperature interval, reducing the maximum torque of the engine to reduce the load of the clutch, wherein the lower limit value of the third temperature interval is greater than the upper limit value of the second temperature interval.
Further, in an embodiment, the execution module 20 is configured to:
when the temperature interval of the oil temperature of the gearbox is a third temperature interval, acquiring a horizontal inclination angle of the vehicle;
and when the horizontal inclination angle is smaller than a preset angle, reducing the maximum torque of the engine.
Further, in an embodiment, the execution module 20 is configured to:
and when the temperature interval of the oil temperature of the gearbox is a fourth temperature interval, switching the gear shifting mode from unpowered interrupted gear shifting to power interrupted gear shifting, wherein the lower limit value of the fourth temperature interval is larger than the upper limit value of the third temperature interval.
Further, in an embodiment, the execution module 20 is configured to:
and when the temperature interval of the oil temperature of the gearbox is a fifth temperature interval, controlling the clutch to be fully opened, wherein the lower limit value of the fifth temperature interval is greater than the upper limit value of the fourth temperature interval.
The function implementation of each module in the transmission oil temperature control device corresponds to each step in the embodiment of the transmission oil temperature control method, and the function and implementation process are not described in detail herein.
In a fourth aspect, the embodiment of the present invention further provides a readable storage medium.
The readable storage medium of the invention stores a transmission oil temperature control program, wherein the transmission oil temperature control program realizes the steps of the transmission oil temperature control method when being executed by a processor.
The method for implementing the transmission oil temperature control program when executed can refer to each embodiment of the transmission oil temperature control method of the present invention, and details are not repeated herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing a terminal device to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A transmission oil temperature control method is characterized by comprising the following steps:
acquiring the oil temperature of a gearbox, and determining a temperature interval where the oil temperature of the gearbox is located;
and executing a corresponding control strategy based on the temperature interval where the gearbox oil temperature is located so as to reduce the gearbox oil temperature.
2. The transmission oil temperature control method according to claim 1, wherein the step of executing the control strategy corresponding to the temperature interval comprises:
and when the temperature interval of the oil temperature of the gearbox is a first temperature interval, starting a cooling fan to increase cold air entering the engine compartment.
3. The transmission oil temperature control method according to claim 2, wherein the step of executing the control strategy corresponding to the temperature interval further comprises:
and when the temperature interval of the oil temperature of the gearbox is a second temperature interval, starting a negative accelerator gradient function to reduce the gear shifting frequency, wherein the lower limit value of the second temperature interval is greater than the upper limit value of the first temperature interval.
4. The transmission oil temperature control method according to claim 3, wherein the step of executing the control strategy corresponding to the temperature interval further comprises:
and when the temperature interval of the oil temperature of the gearbox is a third temperature interval, reducing the maximum torque of the engine to reduce the load of the clutch, wherein the lower limit value of the third temperature interval is greater than the upper limit value of the second temperature interval.
5. The transmission oil temperature control method according to claim 4, wherein the step of reducing the maximum torque of the engine when the temperature interval in which the transmission oil temperature is located is a third temperature interval comprises:
when the temperature interval of the oil temperature of the gearbox is a third temperature interval, acquiring a horizontal inclination angle of the vehicle;
and when the horizontal inclination angle is smaller than a preset angle, reducing the maximum torque of the engine.
6. The transmission oil temperature control method according to claim 4, wherein the step of executing the control strategy corresponding to the temperature interval further comprises:
and when the temperature interval of the oil temperature of the gearbox is a fourth temperature interval, switching the gear shifting mode from unpowered interrupted gear shifting to power interrupted gear shifting, wherein the lower limit value of the fourth temperature interval is larger than the upper limit value of the third temperature interval.
7. The transmission oil temperature control method according to claim 6, wherein the step of executing the control strategy corresponding to the temperature interval further comprises:
and when the temperature interval of the oil temperature of the gearbox is a fifth temperature interval, controlling the clutch to be fully opened, wherein the lower limit value of the fifth temperature interval is greater than the upper limit value of the fourth temperature interval.
8. A transmission oil temperature control device, characterized by comprising:
the determining module is used for acquiring the oil temperature of the gearbox and determining the temperature interval of the oil temperature of the gearbox;
and the execution module is used for executing a corresponding control strategy based on the temperature interval where the gearbox oil temperature is located so as to reduce the gearbox oil temperature.
9. A transmission oil temperature control apparatus comprising a processor, a memory, and a transmission oil temperature control program stored on the memory and executable by the processor, wherein the transmission oil temperature control program when executed by the processor implements the steps of the transmission oil temperature control method according to any one of claims 1 to 7.
10. A readable storage medium having a transmission oil temperature control program stored thereon, wherein the transmission oil temperature control program, when executed by a processor, implements the steps of the transmission oil temperature control method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010990051.9A CN112283327A (en) | 2020-09-18 | 2020-09-18 | Gearbox oil temperature control method, device and equipment and readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010990051.9A CN112283327A (en) | 2020-09-18 | 2020-09-18 | Gearbox oil temperature control method, device and equipment and readable storage medium |
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| CN112283327A true CN112283327A (en) | 2021-01-29 |
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| CN202010990051.9A Pending CN112283327A (en) | 2020-09-18 | 2020-09-18 | Gearbox oil temperature control method, device and equipment and readable storage medium |
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| CN113586624A (en) * | 2021-07-30 | 2021-11-02 | 东风商用车有限公司 | AMT clutch energy protection method, device, equipment and storage medium |
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