CN115234644A - Gear control method and device for automatic gearbox of vehicle - Google Patents
Gear control method and device for automatic gearbox of vehicle Download PDFInfo
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- CN115234644A CN115234644A CN202210935748.5A CN202210935748A CN115234644A CN 115234644 A CN115234644 A CN 115234644A CN 202210935748 A CN202210935748 A CN 202210935748A CN 115234644 A CN115234644 A CN 115234644A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000002826 coolant Substances 0.000 claims abstract description 132
- 230000005540 biological transmission Effects 0.000 claims abstract description 94
- 238000004590 computer program Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 abstract description 11
- 230000000630 rising effect Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
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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
- F16H59/74—Inputs being a function of engine parameters
- F16H59/78—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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/74—Inputs being a function of engine parameters
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Abstract
The invention provides a gear control method and a gear control device of an automatic gearbox of a vehicle, wherein in the gear control method of the automatic gearbox of the vehicle, an engine coolant temperature value of the vehicle and a first gear of the automatic gearbox are obtained; and if the engine coolant temperature value meets a first preset condition and the first gear of the automatic gearbox meets a downshift condition, controlling the automatic gearbox to downshift. According to the method and the device, the gears of the automatic transmission are controlled according to the temperature value of the engine coolant, and the automatic transmission is downshifted when the temperature of the engine coolant does not reach the limit temperature value, so that the cooling capacity of the whole vehicle is enhanced, the temperature of the engine coolant is reduced or the rising trend of the engine coolant is slowed down, the triggering frequency of the temperature value of the engine coolant of the vehicle reaching the torque limit temperature value is reduced, and the influence on the running of the vehicle is reduced.
Description
Technical Field
The invention belongs to the technical field of vehicle control, and particularly relates to a gear control method and device for an automatic gearbox of a vehicle.
Background
The engine may have too high a coolant temperature during the operation of the vehicle, and the engine is easily damaged due to the too high coolant temperature.
At present, when the temperature of the engine coolant reaches a limit value, the torque of the engine is limited, so that the work of the engine is reduced, the heat generated by the engine is reduced, and the engine is prevented from being damaged. However, limiting the torque of the engine reduces the vehicle operating power, which affects the operation of the vehicle.
Disclosure of Invention
In view of this, the present invention provides a method and a device for controlling an automatic transmission, which reduce the frequency of triggering when a temperature value of a coolant of a vehicle engine reaches a torque limit temperature value, and reduce the influence on the vehicle operation.
In order to achieve the above purpose, the embodiment of the invention discloses the following technical scheme:
a gear control method of an automatic transmission for a vehicle, comprising:
acquiring an engine coolant temperature value of a vehicle and a first gear of an automatic gearbox;
and if the temperature value of the engine coolant meets a first preset condition and the first gear of the automatic transmission meets a downshift condition, controlling the automatic transmission to downshift, wherein the first preset condition is that the temperature value of the engine coolant is greater than or equal to a first temperature value and smaller than a second temperature value, and the downshift condition is that the first gear of the automatic transmission is greater than or equal to 2 gears.
Optionally, the first preset condition further includes that a difference between the engine coolant temperature value and the second temperature value is greater than or equal to a threshold value, and the controlling the automatic transmission to downshift includes:
and controlling the automatic gearbox to descend to the 1 st gear.
Optionally, the first preset condition further includes that a difference between a coolant temperature value of the engine and the second temperature value is smaller than a threshold, and the controlling the automatic transmission to downshift includes:
determining a target descending gear position number according to the engine coolant temperature value and a preset corresponding relation between the engine coolant temperature value and the target descending gear position number;
and controlling the automatic gearbox to descend gears according to the target descending gear number.
Optionally, the controlling the automatic transmission to downshift includes:
determining a second gear according to the engine coolant temperature value and a preset corresponding relation between the engine coolant temperature value and the second gear;
and controlling the automatic gearbox to descend to the second gear, wherein the second gear is lower than the first gear.
Optionally, the method further includes:
and if the temperature value of the engine coolant meets a second preset condition, controlling the automatic gearbox to ascend, wherein the second preset condition comprises that the temperature value of the engine coolant is less than or equal to a third temperature value, and the third temperature value is less than the first temperature value.
Optionally, the controlling the automatic transmission to ascend the gear includes:
and controlling the automatic gearbox to ascend to the first gear.
Optionally, the method further includes: acquiring the running speed of the vehicle;
the controlling of the automatic transmission to ascend gears comprises the following steps:
determining a third gear according to the vehicle running speed and a preset corresponding relation between the vehicle running speed and the third gear;
and controlling the automatic gearbox to ascend to the third gear.
A gear control device of a vehicular automatic transmission, comprising:
the automatic transmission comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is specifically used for acquiring an engine coolant temperature value of a vehicle and a first gear of the automatic transmission;
the first control unit is specifically used for controlling the automatic transmission to downshift if the engine coolant temperature value meets a first preset condition and a first gear of the automatic transmission meets a downshift condition, the first preset condition is that the engine coolant temperature value is greater than or equal to a first temperature value and is smaller than a second temperature value, and the downshift condition is that the first gear of the automatic transmission is greater than or equal to 2 gears.
A computer-readable storage medium, having stored thereon a computer program for executing by a processor the steps of any of the above-described gear control methods for an automatic transmission of a vehicle.
A terminal comprises a memory and a processor, wherein a computer program is stored in the memory, and the processor realizes the steps of any one of the gear control methods for the automatic gearbox of the vehicle when calling the computer program in the memory.
Therefore, in the gear control method for the automatic transmission of the vehicle disclosed by the embodiment of the invention, when the engine coolant temperature value is judged to meet the first preset condition and the first gear of the automatic transmission meets the downshift condition, the automatic transmission is controlled to downshift. The gear of the automatic transmission is controlled according to the temperature value of the engine coolant, when the temperature value of the engine coolant does not reach the torque limit temperature value, the automatic transmission is downshifted, the rotating speed of the engine can be increased after downshifting, the rotating speeds of the fan and the water pump are increased, the cooling capacity of the whole vehicle is enhanced, the temperature of the engine coolant is reduced or the rising trend is slowed down, the triggering frequency of the temperature value of the engine coolant of the vehicle reaching the torque limit temperature value is reduced, and the influence on the running of the vehicle is reduced.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for controlling a gear of an automatic transmission for a vehicle according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for controlling the gears of an automatic transmission for a vehicle according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a gear control device of an automatic transmission of a vehicle according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In order to facilitate understanding of the technical solutions provided by the present invention, the following description will be made of the background art related to the present invention.
The inventor finds that the damage of the engine caused by the overhigh temperature of the cooling liquid of the engine is prevented in the process of running the vehicle. When the temperature of the engine coolant reaches a limit value, torque limitation is performed on the engine to reduce work of the engine and reduce heat generated by the engine, so that the engine is protected. However, torque limiting of the vehicle engine can affect vehicle operation. For example, during uphill, if the engine is torque limited, the output power of the engine of the vehicle is reduced, thereby affecting the climbing capability of the vehicle and the normal operation of the vehicle.
Based on this, according to the gear control method and the gear control device for the automatic transmission of the vehicle provided by the embodiment of the invention, by acquiring the engine coolant temperature value of the vehicle and the first gear of the automatic transmission, if the engine coolant temperature value meets a first preset condition and the first gear of the automatic transmission meets a downshift condition, the automatic transmission is controlled to downshift, wherein the first preset condition is that the engine coolant temperature value is greater than or equal to a first temperature value and less than a second temperature value, and the downshift condition is that the first gear of the automatic transmission is greater than or equal to 2 gears. Therefore, the automatic transmission control method can control the gears of the automatic transmission according to the temperature value of the engine coolant, downshift is carried out on the automatic transmission when the temperature of the engine coolant does not reach the torque limit temperature value, the engine speed is increased after downshift, the cooling capacity of the whole vehicle is enhanced, the temperature of the engine coolant is reduced or the rising trend of the engine coolant is slowed, the triggering frequency of the temperature value of the engine coolant of the vehicle reaching the torque limit temperature value is reduced, and the influence on the running of the vehicle is reduced.
In order to facilitate understanding of the technical solutions provided by the present invention, a method for controlling gears of an automatic transmission for a vehicle according to the present invention will be described with reference to the accompanying drawings.
Referring to fig. 1, a method for controlling a gear position of an automatic transmission for a vehicle according to an embodiment of the present invention is shown in fig. 1 and includes steps S101-S102.
S101: an engine coolant temperature value of the vehicle and a first gear of the automatic transmission are obtained.
The engine coolant is an indispensable part of the vehicle engine, circulates in an engine cooling system, and can take away surplus heat generated during the operation of the engine so as to reduce the operating temperature of the engine. The temperature value of the engine coolant is required to be within a normal temperature range so as to ensure the normal operation of the engine.
The embodiment of the invention does not limit the way of acquiring the temperature value of the cooling liquid of the vehicle engine. As an example, an engine coolant temperature value from an Electronic Control Unit (ECU) of a vehicle is obtained through a Controller Area Network (CAN) bus.
As one example, obtaining the engine coolant temperature value may be performed in real time to ensure that the engine coolant temperature value is accurately and timely obtained.
As an example, the process of obtaining the engine coolant temperature value may be performed after the vehicle is started to ensure that the entire driving process of the vehicle can be effectively monitored.
The first gear of the automatic transmission refers to a gear of the vehicle in the current driving state. It can be understood that the automatic gearbox can automatically adjust gears according to the current driving state of the vehicle, and automatic gear shifting is realized. The running state of the vehicle may include a running speed of the vehicle. Of course, the invention is not limited thereto, and in other embodiments, the driving state of the vehicle may have other options.
The embodiment of the invention does not limit the acquisition mode for acquiring the first gear of the automatic gearbox. As an example, the first gear of the automatic transmission from the ECU is obtained through the CAN bus.
The embodiment of the application does not limit the specific implementation manner for triggering and acquiring the first gear of the automatic gearbox. In one possible implementation, the first gear of the automatic transmission may be obtained in real time. In another possible implementation manner, the gear shifting frequency of the automatic transmission is low, and the first gear of the automatic transmission may be periodically acquired, that is, the gear of the automatic transmission is read once every preset time interval, so as to reduce the data amount of the acquired first gear of the automatic transmission, thereby improving the data processing efficiency.
In another possible implementation manner, when the engine coolant temperature value of the vehicle is obtained, it is determined that the engine coolant temperature value meets a first preset condition, at this time, the first gear of the automatic transmission needs to be determined, and then the first gear of the automatic transmission is obtained. At this time, the first gear of the automatic transmission is acquired, so that the acquired data volume of the first gear of the automatic transmission can be more effectively reduced, and the data processing efficiency is more effectively improved.
S102: and if the engine coolant temperature value meets a first preset condition and the first gear of the automatic gearbox meets a downshift condition, controlling the automatic gearbox to downshift.
In the embodiment of the application, the first preset condition is that the temperature value of the engine coolant is greater than or equal to a first temperature value and less than a second temperature value. It will be appreciated that the first temperature value may be a minimum temperature that lowers the temperature of the engine coolant, and the second temperature value may be an engine torque limit temperature value, i.e., a temperature value at which torque limiting of the engine is achieved. The first temperature value and the second temperature value may be preset according to actual needs, and in one possible implementation manner, the first temperature value may be 110 ℃ and the second temperature value may be 115 ℃. Of course, the invention is not limited thereto, and in other embodiments, the first temperature value and the second temperature value may have other choices.
The downshift condition may be that the gear position of the automatic transmission is greater than or equal to 2, and it is understood that the downshift of the automatic transmission is performed only if the gear position of the automatic transmission is greater than or equal to 2, and the downshift cannot be continued when the automatic transmission is in the lowest gear position, i.e., 1 st gear.
In one possible implementation manner, the embodiment of the invention further provides three specific implementation manners for controlling the downshift of the automatic transmission of the vehicle, which are described in detail below.
And when judging whether the engine coolant temperature value meets a first preset condition and the first gear of the automatic gearbox meets a downshift condition, controlling the automatic gearbox to downshift. Therefore, the embodiment of the invention can control the gear of the automatic transmission according to the temperature value of the engine coolant, downshifts the automatic transmission when the temperature value of the engine coolant does not reach the limit temperature value, the rotating speed of the engine is increased after downshifting, the rotating speed of a fan and a water pump is increased, the cooling capacity of the whole vehicle is enhanced, the temperature of the engine coolant is reduced or the rising trend is slowed, the triggering frequency of the temperature value of the engine coolant of the vehicle reaching the torque limit temperature value is reduced, and the influence on the running of the vehicle is reduced.
In the running process of the vehicle, the influence of the temperature of the engine coolant on the vehicle under different temperature conditions is different. Different downshifting control can be carried out according to different temperature conditions.
The embodiment of the invention also provides three downshifting modes, which are as follows:
the first method comprises the following steps: and controlling the automatic gearbox to descend to the 1 st gear.
In the first downshift mode, the first preset condition further includes that the difference value between the engine coolant temperature value and the second temperature value is larger than or equal to a threshold value, and the automatic transmission is controlled to descend to the 1 st gear if the condition is met. It can be understood that, in the embodiment of the present invention, it is further determined whether a difference between the engine coolant temperature value and the second temperature value is greater than a threshold, and when the difference between the engine coolant temperature value and the second temperature value is greater than the threshold, it can be considered that a large difference still exists between the engine coolant temperature value and the second temperature value, which indicates that the engine coolant temperature value is not high and is in a particularly dangerous interval. At the moment, the requirement of reducing the temperature value of the engine coolant or enabling the temperature rising trend of the engine coolant to be gentle can be met by controlling the automatic gearbox to descend by 1 gear.
And the second method comprises the following steps: and controlling the automatic gearbox to descend gears according to the target descending gear number.
In a second downshift mode, the first preset condition further includes that the difference value between the coolant temperature value of the engine and the second temperature value is smaller than the threshold value, a target downshift gear number corresponding to the coolant of the engine is determined according to the preset corresponding relation between the coolant temperature value of the engine and the target downshift gear number, and the automatic transmission is controlled to downshift according to the target downshift gear number.
It can be understood that, the embodiment of the present invention further determines whether a difference between the engine coolant temperature value and the second temperature value is smaller than a threshold, and when the difference between the engine coolant temperature value and the second temperature value is greater than the threshold, it indicates that the engine coolant temperature value is very close to the engine torque limit temperature, and at this time, if the engine coolant temperature value is very high, a stronger cooling capability is required to meet a requirement of reducing the engine coolant temperature value or making an upward trend of the engine coolant temperature slow.
And according to the preset corresponding relation between the engine coolant temperature value and the target reduction gear number, the target reduction gear number corresponding to the engine coolant is determined, the automatic gearbox is controlled to reduce gears according to the target reduction gear number, multiple gears can be reduced at one time, the rotating speed of the engine is increased more, the rotating speed of the fan and the water pump is increased more, and the cooling capacity of the whole vehicle is improved better. It can be understood that the embodiment can be used for better cooling when the temperature value of the engine coolant is higher.
The preset corresponding relation between the engine coolant temperature value and the target gear reduction bit number needs to be determined according to various conditions such as specific conditions, experience and test data of specific vehicles and engines.
And the third is that: and controlling the gear of the automatic gearbox to descend to a second gear.
In a third downshift mode, determining a second gear corresponding to the engine coolant temperature value according to a preset corresponding relation between the engine coolant temperature value and the second gear; and controlling the automatic gearbox to descend to a second gear, wherein the second gear is lower than the first gear.
It can be understood that, this application can also preset the corresponding relation of engine coolant temperature value and second gear, when engine coolant temperature value reached a certain specific temperature promptly, can direct control automatic transmission drop to the second gear, and the second gear is less than first gear. In an alternative, the second gear may be gear 1, i.e. when the engine coolant temperature reaches a dangerous temperature, the automatic gearbox is directly stepped down to gear 1. Of course, the second gear may also be selected from a plurality of gears, and it is only necessary that the second gear is lower than the first gear. For example, the second gear may also have gear 1, gear 2, and gear 3, each gear corresponds to different engine coolant temperatures, and when the engine coolant temperature value reaches a dangerous temperature, the gear of the automatic transmission is directly lowered to gear 1, or directly lowered to gear 2, or directly lowered to gear 3 according to the engine coolant temperature value and the corresponding relationship between the engine coolant temperature value and the second gear.
The preset corresponding relation between the engine coolant temperature value and the second gear needs to be determined according to various conditions such as specific conditions, experience and test data of specific vehicles and engines.
In the running process of the vehicle, when the temperature value of the engine coolant with overhigh temperature is recovered to a normal temperature value, the automatic gearbox needs to be shifted up to ensure the subsequent normal running of the vehicle.
Referring to fig. 2, another method for controlling the gear of an automatic transmission for a vehicle according to an embodiment of the present invention is shown in fig. 2, and includes steps S101-S103.
S101-S102 are as described above and are not described in detail herein. On the basis of S101-S102, the embodiment of the invention is additionally provided with S103: if the temperature value of the engine coolant meets a second preset condition, controlling the automatic gearbox to ascend; the second preset condition includes that the engine coolant temperature value is less than or equal to a third temperature value, and the third temperature value is less than the first temperature value.
After the engine downshifts, the embodiment of the invention also judges whether the engine coolant temperature value meets a second preset condition, wherein the second preset condition comprises that the engine coolant temperature value is less than or equal to a third temperature value, and the third temperature value is less than the first temperature value. And if so, controlling the automatic gearbox to ascend. The third temperature value can be understood as the highest engine coolant temperature required for recovering the normal operation of the vehicle, and likewise, the specific value of the third temperature value can be set according to the actual requirement.
It can be understood that after the automatic gearbox is downshifted, the rotating speed of the engine is increased, so that the rotating speeds of the fan and the water pump are increased, the cooling capacity of the whole vehicle is enhanced, and the temperature value of the engine coolant is reduced or the rising trend is slowed down. That is, the present embodiment is such that when the engine coolant temperature value falls sufficiently low, the automatic transmission is upshifted so that the vehicle resumes normal gear operation.
The embodiment of the invention also provides two upshifting modes, which are as follows:
in one upshift mode, the automatic transmission may be controlled to upshift to a first gear of the automatic transmission, which is a gear of the vehicle when entering the gear control method. It can be understood that after the automatic gearbox downshifts, the temperature value of the engine coolant obviously decreases, and the temperature of the gear needing to be increased can be quickly reached.
In another gear-up mode, the running speed of the vehicle can be acquired, and a third gear corresponding to the running speed is determined according to the preset corresponding relation between the running speed of the vehicle and the third gear; and controlling the automatic gearbox to ascend to a third gear. It can be understood that, in the downshift control process, the temperature value of the engine coolant slowly decreases, and the temperature value for increasing the upshift of the automatic transmission can be reached after a period of time, under the condition, the running states of the vehicle, such as the running speed, can be greatly changed, at the moment, the third gear needs to be determined according to the running speed of the vehicle, and the vehicle is controlled to ascend to the third gear, so that the vehicle can be ensured to continue to run normally.
The preset corresponding relationship between the vehicle running speed and the third gear needs to be determined according to various conditions such as specific conditions, experience, test data and the like of specific vehicles and engines.
The gear control method for the automatic transmission of the vehicle provided by the embodiment of the application is introduced above, and the gear control method for the automatic transmission of the vehicle is exemplarily described below by combining specific application scenarios.
After the vehicle is started, the engine coolant temperature and the automatic gearbox gear of the vehicle can be obtained in real time, and the first temperature, the second temperature and the third temperature of the vehicle can be preset to be 110 ℃, 115 ℃ and 100 ℃ according to specific conditions.
If the temperature value of the engine coolant obtained in real time reaches 110 ℃, and the gear of the automatic transmission is 3, the temperature value of the engine coolant is in a state needing cooling, and the automatic transmission meets the downshift condition, and at the moment, the automatic transmission can be controlled.
And a certain difference exists between the temperature value of the engine coolant and the second temperature value at the moment, which shows that the temperature value of the engine coolant is not high and is in a particularly dangerous interval, and the automatic gearbox is controlled to descend by 1 gear at the moment.
After the automatic gearbox descends by 1 gear, the rotating speed of the engine can be increased, the rotating speeds of the fan and the water pump are increased, the cooling capacity of the whole vehicle is enhanced, and the temperature of the engine coolant is reduced or the rising trend of the engine coolant is slowed down. In the process, the vehicle can also obtain the temperature value of the engine coolant in real time, if the temperature of the engine coolant is reduced to 100 ℃ through downshift control, the temperature of the engine coolant is indicated to be recovered to the normal water temperature, and the automatic gearbox is controlled to shift up at the moment, so that the vehicle keeps running normally.
The following describes a gear control device for an automatic transmission of a vehicle according to an embodiment of the present application, and the following devices and the above-described gear control method for an automatic transmission of a vehicle may be referred to in correspondence.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a shift control device for an automatic transmission of a vehicle according to an embodiment of the present application, where the device may include:
the first obtaining unit 301 is specifically configured to obtain an engine coolant temperature value of the vehicle and a first gear of the automatic transmission.
The first control unit 302 is specifically configured to control the automatic transmission to downshift if the engine coolant temperature value meets a first preset condition and a first gear of the automatic transmission meets a downshift condition, where the first preset condition is that the engine coolant temperature value is greater than or equal to a first temperature value and is less than a second temperature value, and the downshift condition is that the first gear of the automatic transmission is greater than or equal to 2 gears.
In a possible implementation manner, the first control unit further includes:
and the first control subunit is used for controlling the automatic gearbox to descend to the 1 st gear when the first preset condition further comprises that the difference value between the engine coolant temperature value and the second temperature value is greater than or equal to a threshold value.
In one possible implementation manner, the first control unit further includes:
the first determining subunit is specifically configured to determine the target downshift gear number according to the engine coolant temperature value and a preset corresponding relationship between the engine coolant temperature value and the target downshift gear number when the first preset condition further includes that a difference between the engine coolant temperature value and the second temperature value is smaller than a threshold value.
And the second control subunit is specifically used for controlling the automatic gearbox to lower gears according to the target gear lowering position number.
In one possible implementation manner, the first control unit further includes:
the second determining subunit is specifically configured to determine the second gear according to the engine coolant temperature value and a preset corresponding relationship between the engine coolant temperature value and the second gear;
and the third control subunit is specifically configured to control the automatic transmission to fall to the second gear, which is lower than the first gear.
In one possible implementation, the apparatus further includes:
and the second control unit is specifically used for controlling the automatic transmission to ascend if the temperature value of the engine coolant meets a second preset condition, wherein the second preset condition comprises that the temperature value of the engine coolant is less than or equal to a third temperature value, and the third temperature value is less than the first temperature value.
In one possible implementation manner, the second control unit further includes:
and the fourth control subunit is specifically used for controlling the automatic gearbox to ascend to the first gear.
In one possible implementation, the apparatus further includes: the second acquisition unit is specifically used for acquiring the running speed of the vehicle;
the second control unit further includes:
the third determining subunit is specifically configured to determine a third gear according to the vehicle running speed and a preset corresponding relationship between the vehicle running speed and the third gear;
and the fifth control subunit is specifically used for controlling the automatic gearbox to ascend to the third gear.
The present invention also provides a computer readable storage medium having stored thereon a computer program which, when executed, performs the steps provided by the above-described embodiments. The storage medium may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
It should be noted that the computer-readable storage medium provided in the embodiment of the present invention has the technical effects of any one of the above embodiments, and details of the embodiment of the present invention are not repeated herein.
The application further provides a terminal, which may include a memory and a processor, where the memory stores a computer program, and the processor may implement the steps provided by the foregoing embodiments when calling the computer program in the memory. Of course, the terminal may also include various network interfaces, power supplies, and the like.
It should be noted that, the terminal provided in the embodiment of the present invention has the technical effects as any one of the above embodiments, and details of the embodiment of the present invention are not described herein.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. A gear control method of an automatic transmission for a vehicle, characterized by comprising:
acquiring an engine coolant temperature value of a vehicle and a first gear of an automatic gearbox;
and if the temperature value of the engine coolant meets a first preset condition and the first gear of the automatic transmission meets a downshift condition, controlling the automatic transmission to downshift, wherein the first preset condition is that the temperature value of the engine coolant is greater than or equal to a first temperature value and smaller than a second temperature value, and the downshift condition is that the first gear of the automatic transmission is greater than or equal to 2 gears.
2. The method of claim 1, wherein the first preset condition further comprises a difference between the engine coolant temperature value and the second temperature value being greater than or equal to a threshold value, and wherein said controlling the automatic transmission downshift comprises:
and controlling the automatic gearbox to descend to the 1 st gear.
3. The method of claim 1, wherein the first preset condition further comprises a difference between a coolant temperature value of the engine and the second temperature value being less than a threshold value, and wherein controlling the automatic transmission downshift comprises:
determining a target descending gear position number according to the engine coolant temperature value and a preset corresponding relation between the engine coolant temperature value and the target descending gear position number;
and controlling the automatic gearbox to descend gears according to the target descending gear number.
4. The method of claim 1, wherein said controlling said automatic transmission downshift comprises:
determining a second gear according to the engine coolant temperature value and a preset corresponding relation between the engine coolant temperature value and the second gear;
and controlling the automatic gearbox to descend to the second gear, wherein the second gear is lower than the first gear.
5. The method according to any one of claims 1-4, further comprising:
and if the temperature value of the engine coolant meets a second preset condition, controlling the automatic gearbox to ascend, wherein the second preset condition comprises that the temperature value of the engine coolant is less than or equal to a third temperature value, and the third temperature value is less than the first temperature value.
6. The method of claim 5, wherein the controlling the automatic transmission to upshift comprises:
and controlling the automatic gearbox to ascend to the first gear.
7. The method of claim 5, further comprising: acquiring the running speed of the vehicle;
the controlling the automatic transmission to ascend gears comprises the following steps:
determining a third gear according to the vehicle running speed and a preset corresponding relation between the vehicle running speed and the third gear;
and controlling the automatic gearbox to ascend to the third gear.
8. A shift position control device of an automatic transmission for a vehicle, characterized by comprising:
the automatic transmission control device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is specifically used for acquiring an engine coolant temperature value of a vehicle and a first gear of the automatic transmission;
the first control unit is specifically used for controlling the automatic transmission to downshift if the engine coolant temperature value meets a first preset condition and a first gear of the automatic transmission meets a downshift condition, the first preset condition is that the engine coolant temperature value is greater than or equal to a first temperature value and is smaller than a second temperature value, and the downshift condition is that the first gear of the automatic transmission is greater than or equal to 2 gears.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
10. A terminal, characterized in that it comprises a memory in which a computer program is stored and a processor which, when it is called up in said memory, implements the steps of the method according to any one of claims 1 to 7.
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| CN202210935748.5A CN115234644B (en) | 2022-08-04 | 2022-08-04 | Gear control method and device for automatic gearbox of vehicle |
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| CN202210935748.5A CN115234644B (en) | 2022-08-04 | 2022-08-04 | Gear control method and device for automatic gearbox of vehicle |
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Cited By (1)
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| CN115949738A (en) * | 2023-03-10 | 2023-04-11 | 潍柴动力股份有限公司 | AMT gear shifting control method and system and vehicle |
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| CN115234644B (en) | 2024-08-16 |
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