CN113513583B - Control method and device for delaying gear-up after vehicle fuel door is released and automatic transmission - Google Patents
Control method and device for delaying gear-up after vehicle fuel door is released and automatic transmission Download PDFInfo
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- CN113513583B CN113513583B CN202110591653.1A CN202110591653A CN113513583B CN 113513583 B CN113513583 B CN 113513583B CN 202110591653 A CN202110591653 A CN 202110591653A CN 113513583 B CN113513583 B CN 113513583B
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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
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
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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
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
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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
- F16H61/02—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 characterised by the signals used
- F16H61/0202—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 characterised by the signals used the signals being electric
- F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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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
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
- F16H2061/161—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed by checking feasibility of shifts, i.e. determine if requested shift can be successfully completed and post shift values are in an acceptable range
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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Abstract
The invention discloses a control method and a device for delaying gear-up after an accelerator of a vehicle is released, and an automatic transmission, wherein the method comprises the following steps: after the FastOff function of the vehicle is activated, determining the delay time for executing the upshift after the FastOff function is activated according to the target gear and the target gear synchronous rotating speed; in the process of decreasing the delay time, if the opening degree of an accelerator pedal is detected to be larger than zero and the gradient of the accelerator pedal is detected to be smaller than a first set limit value, determining reset time according to the rotating speed of the engine and the opening degree of the accelerator pedal; the remaining time and the reset time of the delay time are reduced to obtain the gear-up restraining time; when the suppression upshift time is decreased to zero, the upshift action is executed. The control method can more flexibly control the function of inhibiting the upshifting after the throttle is released, is convenient to control the working rotating speed range of the engine with the function of inhibiting the upshifting, avoids the problem of unacceptable engine noise and can also effectively avoid frequent gear shifting of the vehicle.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method for delaying gear-up after an accelerator of a vehicle is released, a computer readable storage medium, an automatic transmission and a control device for delaying gear-up after the accelerator of the vehicle is released.
Background
For an automatic transmission, when an accelerator is stepped again to execute power downshift in the process of sliding and upshifting after the accelerator is released, rushing and noise are easily generated, and the working condition is only adjusted through an executing mechanism, so that only part of problems can be weakened, and the practical problems cannot be solved, therefore, an upper-layer driving control strategy is required to perform optimization, namely a FastOff function.
At present, in some automatic transmission control strategies, a FastOff function is controlled based on signals limited by a forced upshift rotating speed, upshift times and an accelerator gradient, however, in the control mode, linear adjustment cannot be performed based on a target gear and a target gear synchronous rotating speed, frequent gear shifting and no gear shifting can occur, the flexibility is too low, the practicability is poor, and the driving experience of a user is influenced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide a method for controlling a delayed upshift after a vehicle is released from an accelerator, which can more flexibly control an upshift inhibiting function after the vehicle is released from the accelerator, and at the same time, is convenient to control an engine operating speed range in which the upshift inhibiting function is inhibited, thereby avoiding the problem of unacceptable engine noise, and also effectively avoiding frequent vehicle gear shifting.
A second object of the invention is to propose a computer-readable storage medium.
A third object of the present invention is to propose an automatic transmission.
A fourth object of the present invention is to provide a control device for delaying an upshift after a vehicle release door.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for controlling a delayed upshift after a vehicle releases a throttle, including: after the FastOff function of the vehicle is activated, determining the delay time for executing the upshift after the FastOff function is activated according to the target gear and the target gear synchronous rotating speed; in the process of descending the delay time, if the opening degree of an accelerator pedal is detected to be larger than zero and the gradient of the accelerator pedal is detected to be smaller than a first set limit value, determining reset time according to the rotating speed of the engine and the opening degree of the accelerator pedal; taking down the residual time and the reset time of the delay time to obtain the upshift inhibiting time; when the suppression upshift time is decreased to zero, the upshift action is executed.
According to the control method for delaying the upshift after the throttle release of the vehicle, after a FastOff function of the vehicle is activated, the delay time for executing the upshift after the FastOff function is activated is determined according to the target gear and the target gear synchronous rotating speed; in the process of decreasing the delay time, if the opening degree of an accelerator pedal is detected to be larger than zero and the gradient of the accelerator pedal is detected to be smaller than a first set limit value, determining reset time according to the rotating speed of the engine and the opening degree of the accelerator pedal; the remaining time and the reset time of the delay time are reduced to obtain the gear-up restraining time; when the suppression upshift time is decreased to zero, an upshift action is executed. Therefore, the method can more flexibly control the function of inhibiting the upshifting after the throttle is released, is convenient for controlling the range of the working rotating speed of the engine with the function of inhibiting the upshifting, avoids the problem of unacceptable engine noise and can also effectively avoid frequent gear shifting of the vehicle.
In addition, the control method for delaying the gear-up after the vehicle releases the accelerator according to the above embodiment of the invention may further have the following additional technical features:
according to one embodiment of the invention, activating a FastOff function of a vehicle includes: and when the target gear is smaller than the highest gear of the gearbox, the gradient of the accelerator pedal is smaller than a second set limit value, the opening of the accelerator pedal is smaller than a preset opening, and the synchronous rotating speed of the target gear is larger than the rotating speed of the current sliding upshift point, determining to activate the FastOff function of the vehicle.
According to one embodiment of the invention, determining the delay time for performing an upshift after the FastOff function is activated based on a target gear and a target gear synchronous speed comprises: and inquiring a configurable three-dimensional graph according to the target gear and the target gear synchronous rotating speed to obtain the delay time, wherein the three-dimensional graph is a target gear synchronous rotating speed-target gear-delay time table.
According to one embodiment of the invention, in the process of decreasing the delay time, if it is detected that the brake pressure is greater than a preset pressure limit value or the lateral acceleration of the whole vehicle is greater than an acceleration threshold value, the delay time is frozen to keep the function of inhibiting the upshift.
According to one embodiment of the invention, after the upshift is performed, if the target gear synchronous rotational speed after the upshift is still greater than the current coasting upshift point rotational speed, a new delay time is determined continuously according to the target gear and the target gear synchronous rotational speed after the upshift.
According to an embodiment of the invention, the vehicle is controlled to exit the FastOff function if the target gear is detected as the highest gear of the gearbox before an upshift action is performed.
According to one embodiment of the invention, before executing an upshift action, the vehicle is controlled to exit the FastOff function if it is detected that the target gear synchronous speed is less than or equal to a current coast upshift point speed.
In order to achieve the above object, a second aspect of the present invention provides a computer-readable storage medium, on which a control program for a delayed after-release upshift of a vehicle is stored, and the control program is executed by a processor to implement the control method for a delayed after-release upshift of a vehicle.
The computer readable storage medium of the embodiment of the invention can realize the control method for delaying the upshift after the accelerator is released by the vehicle when executing the control method, can more flexibly control the function of inhibiting the upshift after the accelerator is released, is convenient to control the working rotating speed range of the engine with the function of inhibiting the upshift at the same time, avoids the problem of unacceptable engine noise, and can also effectively avoid frequent vehicle gear shifting.
In order to achieve the above object, an automatic transmission according to a third aspect of the present invention includes a memory, a processor, and a control program stored in the memory and operable on the processor for delaying an upshift after a vehicle releases the accelerator, wherein the processor implements the control method for delaying an upshift after a vehicle releases the accelerator when executing the control program for delaying an upshift after a vehicle releases the accelerator.
According to the automatic transmission provided by the embodiment of the invention, by executing the control method for delaying the upshift after the throttle is released, the function of inhibiting the upshift after the throttle is released can be more flexibly controlled, meanwhile, the working rotating speed range of the engine with the function of inhibiting the upshift is convenient to control, the problem of unacceptable engine noise is avoided, and frequent vehicle gear shifting can be effectively avoided.
In order to achieve the above object, a fourth aspect of the present invention provides a control device for delaying an upshift after a vehicle release valve, comprising: the first determining module is used for determining the delay time of executing the upshift after the FastOff function of the vehicle is activated according to the target gear and the target gear synchronous rotating speed; the second determining module is used for determining reset time according to the engine speed and the accelerator pedal opening degree if the accelerator pedal opening degree is detected to be larger than zero and the accelerator pedal gradient is detected to be smaller than a first set limit value in the delay time decreasing process; and the control module is used for reducing the residual time of the delay time and the reset time to obtain the inhibition upshift time, and executing an upshift action when the inhibition upshift time is decreased to zero.
According to the control device for delaying the upshift after the throttle of the vehicle is released, after the FastOff function of the vehicle is activated, the first determining module determines the delay time for executing the upshift after the FastOff function is activated according to the target gear and the synchronous rotating speed of the target gear; in the process of decreasing the delay time, if the opening degree of the accelerator pedal is detected to be larger than zero and the gradient of the accelerator pedal is detected to be smaller than a first set limit value, a second determining module determines reset time according to the rotating speed of the engine and the opening degree of the accelerator pedal; and the control module is used for reducing the residual time and the reset time of the delay time to obtain the restrained upshift time, and executing the upshift action when the restrained upshift time is decreased to zero. Therefore, the device can control the function of inhibiting the upshifting after the throttle is loosened more flexibly, is convenient to control the range of the working rotating speed of the engine with the function of inhibiting the upshifting, avoids the problem of unacceptable engine noise, and can also effectively avoid frequent gear shifting of the vehicle.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flow chart of a control method for delaying an upshift after a vehicle tip-out in accordance with an embodiment of the present invention;
FIG. 2 is a logic diagram of a control method for delaying an upshift after a vehicle tip-out in accordance with an embodiment of the present invention;
FIG. 3 is a flow chart of a method of controlling a delayed upshift after a vehicle tip-out according to a specific example of the present invention;
FIG. 4 is a block schematic diagram of an automatic transmission according to an embodiment of the present invention;
fig. 5 is a block diagram schematically illustrating a control apparatus for a delayed upshift after a release of a throttle of a vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
A control method and apparatus for a delayed upshift after a release of an accelerator of a vehicle, an automatic transmission, and a computer-readable storage medium according to embodiments of the present invention will be described below with reference to the accompanying drawings.
The present application was made by the inventors based on the following studies:
in the control strategy of the automatic gearbox in the prior art, whether the FastOff function is activated or not is controlled in a fixed rotating speed interval, and after the FastOff function is activated, the delay upshift time is fixed based on the number of upshifts, so that linear adjustment cannot be performed based on a target gear and the synchronous rotating speed of the target gear. In addition, after the FastOff function is activated, when the throttle gradient limit does not satisfy the condition, the FastOff function keeps decrementing with the delay of the upshift time, without the freeze function and the reset function, which may cause some shift frequency or no upshift problems. For example, after the FastOff function is activated, in the process of keeping the delay upshift time decreasing, the driver continuously lightly depresses the brake to decelerate the vehicle, if the delay upshift time decreases to 0 at this time and the upshift condition is met at this time, the upshift is executed, but the driver decelerates the vehicle while keeping depressing the brake, so the downshift is quickly carried out, and the problem of frequent gear shifting is caused. For another example, after the FastOff function is activated, in the process of keeping the delay upshift time decreasing, the driver lightly steps on the accelerator to keep accelerating, and since the delay upshift time is not decreased to 0 and the engine speed does not reach the set forced upshift speed, the upshift delay function is kept at this time, so that the rotation speed cannot be increased when the accelerator is stepped on slightly, and further complaints are caused to the user.
In order to solve the above problems, the present invention provides a control method for delaying an upshift after a vehicle releases a throttle, which can acquire a delay time for performing the upshift based on a target gear and a target gear synchronous speed, and can determine whether to activate a freezing function according to a brake pressure and a lateral acceleration during a delay time decrement process, and when it is determined to activate the freezing function, implement a delay time reset function according to an engine speed and an accelerator pedal opening. Therefore, the function of restraining the upshifting after the throttle is released can be controlled more flexibly, the range of the working rotating speed of the engine with the function of restraining the upshifting is convenient to control, the problem of unacceptable engine noise is avoided, and frequent gear shifting of the vehicle can be effectively avoided.
Fig. 1 is a flowchart of a control method for delaying an upshift after a vehicle releases a throttle according to an embodiment of the present invention.
As shown in fig. 1, a control method for delaying an upshift after a vehicle releases an accelerator according to an embodiment of the present invention may include the steps of:
and S1, after the FastOff function of the vehicle is activated, determining the delay time for executing the upshift after the FastOff function is activated according to the target gear and the target gear synchronous rotating speed.
According to one embodiment of the invention, activating a FastOff function of a vehicle includes: and when the target gear is smaller than the highest gear of the gearbox, the gradient of the accelerator pedal is smaller than a second set limit value, the opening degree of the accelerator pedal is smaller than a preset opening degree, and the synchronous rotating speed of the target gear is larger than the rotating speed of the current sliding upshift point, determining to activate the FastOff function of the vehicle. And the second set limit value and the preset opening degree can be calibrated according to the actual condition.
Specifically, during the coasting upshift process after the vehicle is released from the accelerator, whether the condition for activating the FastOff function of the vehicle is met is determined by detecting the target gear, the gradient of the accelerator pedal, the opening degree of the accelerator pedal and the synchronous rotating speed of the target gear. When the following conditions are simultaneously satisfied: and the target gear is smaller than the highest gear of the gearbox, the gradient of the accelerator pedal is smaller than a second set limit value, the opening degree of the accelerator pedal is smaller than a preset opening degree, the synchronous rotating speed of the target gear is larger than the rotating speed of the current sliding upshift point, and the FastOff function of the vehicle is activated. The target gear refers to a gear for judging the start or the end of a gear shifting working condition, the gradient of an accelerator pedal refers to a slope value when the accelerator pedal is stepped loose, the opening degree of the accelerator pedal refers to the depth of the accelerator pedal stepped by a driver, the synchronous rotating speed of the target gear refers to the rotating speed corresponding to the target gear, and the one-to-one corresponding relation between the synchronous rotating speed of the target gear and the rotating speed of a sliding upshift point is prestored.
After the FastOff function of the vehicle is activated, obtaining a delay time for executing the upshift according to the target gear and the target gear synchronous rotating speed, for example, in one embodiment of the invention, determining the delay time for executing the upshift after the FastOff function is activated according to the target gear and the target gear synchronous rotating speed comprises: and inquiring a configurable three-dimensional graph according to the target gear and the target gear synchronous rotating speed to obtain delay time, wherein the three-dimensional graph is a target gear synchronous rotating speed-target gear-delay time table.
In other words, the delay upshift time after the FastOff function is activated is an adjustable three-dimensional graph, and the target gear synchronous rotating speed, the target gear and the delay time are in one-to-one correspondence, so that when the target gear synchronous rotating speed and the target gear are determined, the corresponding three-dimensional graph is called, and the corresponding delay time can be obtained.
S2, in the process of the delay time decreasing, if the detected accelerator pedal opening is larger than zero and the accelerator pedal gradient is smaller than a first set limit value, the reset time is determined according to the engine speed and the accelerator pedal opening. The first set limit value can be calibrated according to actual conditions.
Specifically, if the driver depresses the accelerator to maintain acceleration during the delay time decrementing process, the delay upshift time is not decremented to 0, and the engine speed does not reach the set forced upshift speed, and the upshift delay function is continuously maintained at this time, so that the upshift cannot be performed at a high speed when the accelerator is depressed too small, in which case the delay time needs to be reset, for example, the reset time can be determined according to the accelerator pedal opening and the accelerator pedal gradient. Specifically, when the delay time for executing the upshift is greater than 0, i.e., the delay time is decremented but not decremented to 0, and when it is detected that the accelerator pedal opening is greater than 0 and the accelerator pedal gradient is less than the first set limit value, it indicates that the driver slightly steps on the accelerator to keep accelerating, and at this time, it is required to activate the delay time reset function. And acquiring reset time according to the engine speed and the accelerator pedal opening, and acquiring corresponding reset time by calling a prestored engine speed-accelerator pedal opening-reset time table.
S3, the remaining time of the delay time and the reset time are reduced to obtain the upshift-suppressed time. At S4, when the suppression upshift time is decreased to zero, the upshift operation is executed.
Specifically, in order to further ensure that the inhibition upshift time can be decreased within the shortest time, the minimum value is adopted, that is, the remaining time of the delay time and the reset time are reduced, and the smaller value of the remaining time and the reset time is used as the inhibition upshift time in the subsequent control strategy. And when the inhibition upshift time is decreased to 0, executing an upshift action, ensuring that the noise level of the engine is within an acceptable range, and meeting the intention that a driver changes the driving intention to step on a small accelerator to execute the upshift in time under a FastOff strategy.
When the FastOff function is executed, if the driver has the intention of braking and reducing the speed, the gear shifting is frequent and the performance of the vehicle is affected if some measures are not taken. According to one embodiment of the invention, in the process of decreasing the delay time, if the detected brake pressure is greater than the preset pressure limit value or the lateral acceleration of the whole vehicle is greater than the acceleration threshold value, the delay time is frozen so as to keep the function of restraining the upshift. The preset pressure limit value and the acceleration threshold value can be calibrated according to actual conditions. The brake pressure refers to the depth of the brake pedal stepped by the driver, and the overall lateral acceleration refers to the lateral acceleration acquired by the acceleration sensor in the dynamic running process of the vehicle.
Specifically, in the process of decreasing the delay time, if the driver has the intention of braking and decelerating, whether the current delay time is frozen is determined according to the braking pressure and the lateral acceleration of the whole vehicle, for example, when the braking pressure is greater than a preset pressure limit value or the lateral acceleration of the whole vehicle is greater than an acceleration threshold value, the current delay time is frozen, namely the delay time is not decreased any more, the upshift inhibiting function is kept, and the intention of braking and decelerating of the driver is executed.
According to one embodiment of the invention, after the upshift is performed, if the target gear synchronous rotational speed after the upshift is still greater than the current coast upshift point rotational speed, the new delay time continues to be determined according to the target gear and the target gear synchronous rotational speed after the upshift.
In other words, when the upshift inhibiting time is decreased to zero, an upshift action is executed, if the target gear synchronous rotating speed after the upshift is still higher than the rotating speed at the current coasting upshift point, a table lookup is continued based on the target gear and the target gear synchronous rotating speed to obtain a new delay time, and then the control is performed according to the control logic, which is not described again here.
In the above embodiment, when the inhibit upshift time is decremented to zero, the FastOff function of the vehicle is exited and a normal upshift strategy is executed. In special cases, the FastOff function of the vehicle can also be exited in advance.
According to one embodiment of the invention, the vehicle is controlled to exit the FastOff function if the target gear is detected as the highest gear of the gearbox before the upshift action is performed.
According to another embodiment of the invention, the vehicle is controlled to exit the FastOff function if the target gear synchronous speed is detected to be equal to or less than the current coast upshift point speed before performing the upshift action.
In other words, when it is detected that the delay time is decreased to 0, or the reset time is decreased to 0, or the target gear is the highest gear of the transmission, or the target gear synchronous speed is lower than the current coast upshift point speed, the FastOff function is exited, and the normal upshift strategy is executed.
In conclusion, the control method for delaying the upshift after the accelerator is released for the vehicle can more flexibly and skillfully control the function of inhibiting the upshift after the accelerator is released, effectively avoid frequent gear shifting, reduce the probability of changing the problem of noise rush of driving intention, flexibly control the working rotating speed interval of the engine with the function of inhibiting the upshift and avoid the problem of unacceptable engine noise.
The control method of the present invention is described below with reference to fig. 2 and 3.
As a specific example, the control method of the vehicle delayed upshift after the release of the accelerator may include the steps of:
s101, judging whether the target gear is smaller than the highest gear of the gearbox, the accelerator gradient is smaller than a set limit value, the accelerator pedal is smaller than the set limit value, and the target gear synchronous rotating speed is larger than the corresponding sliding upshift point speed. If yes, executing step S102; if not, the process continues to step S101.
S102, the FastOff function of the vehicle is activated.
And S103, obtaining a delay time T1 based on the target gear and the target gear synchronous rotating speed table look-up.
And S104, in the process of decreasing the delay time T1, judging whether the brake pressure is greater than a set limit value or whether the transverse acceleration of the whole vehicle is greater than the set limit value. If yes, go to step S105; if not, step S106 is performed.
S105, delay time T1 freezes, and the upshift inhibiting function is maintained.
S106, keeping the delay time T1 to be decreased, judging whether the opening of the accelerator pedal is larger than 0 and the gradient of the accelerator pedal is smaller than a set limit value, if so, executing a step S107; if not, step S110 is executed.
S107, the reset function is activated.
S108, the reset time T2 is obtained based on the engine speed and the accelerator pedal opening degree lookup table.
In S109, min (T1, T2) is set as the upshift inhibiting time.
And S110, judging whether the T1 is decreased to 0, or the T2 is decreased to 0, or the target gear is the highest gear of the transmission, or the target gear synchronous rotating speed is lower than the rotating speed at the current sliding upshift point. If yes, executing step S111; otherwise, the procedure returns to step S110.
S111, quitting the FastOff function.
In summary, according to the control method for delaying the upshift after the throttle release of the vehicle according to the embodiment of the present invention, after the FastOff function of the vehicle is activated, the delay time for executing the upshift after the FastOff function is activated is determined according to the target gear and the target gear synchronous rotation speed; in the process of descending the delay time, if the opening degree of an accelerator pedal is detected to be larger than zero and the gradient of the accelerator pedal is detected to be smaller than a first set limit value, determining reset time according to the rotating speed of the engine and the opening degree of the accelerator pedal; the remaining time and the reset time of the delay time are reduced to obtain the gear-up restraining time; when the suppression upshift time is decreased to zero, the upshift action is executed. Therefore, the method can more flexibly control the function of inhibiting the upshifting after the throttle is released, is convenient for controlling the range of the working rotating speed of the engine with the function of inhibiting the upshifting, avoids the problem of unacceptable engine noise and can also effectively avoid frequent gear shifting of the vehicle.
The invention further provides a computer readable storage medium corresponding to the above embodiment.
The computer-readable storage medium of the present invention has stored thereon a control program for a delayed after-release upshift of a vehicle, which when executed by a processor, implements the control method for a delayed after-release upshift of a vehicle described above.
According to the computer-readable storage medium provided by the embodiment of the invention, by executing the control method for delaying the upshift after the throttle of the vehicle is released, the function of inhibiting the upshift after the throttle is released can be more flexibly controlled, meanwhile, the working rotating speed range of the engine with the function of inhibiting the upshift is conveniently controlled, the problem of unacceptable engine noise is avoided, and the frequent gear shifting of the vehicle can be effectively avoided.
The invention also provides an automatic transmission corresponding to the embodiment.
As shown in fig. 4, the automatic transmission 100 of the present invention may include: the memory 110, the processor 120 and the control program for delaying the upshift after the vehicle releases the accelerator are stored in the memory 110 and can run on the processor 120, and when the processor 120 executes the control program for delaying the upshift after the vehicle releases the accelerator, the control method for delaying the upshift after the vehicle releases the accelerator is realized.
According to the automatic transmission, by executing the control method for delaying the upshift after the throttle of the vehicle is released, the function of inhibiting the upshift after the throttle is released can be more flexibly controlled, meanwhile, the working rotating speed range of the engine with the function of inhibiting the upshift is convenient to control, the problem of unacceptable engine noise is avoided, and the frequent gear shifting of the vehicle can be effectively avoided.
The invention also provides a control device for delaying the gear-up after the accelerator of the vehicle is released corresponding to the embodiment.
As shown in fig. 5, the control device for delaying an upshift after a release of an accelerator of a vehicle according to an embodiment of the present invention may include: a first determination module 10, a second determination module 20, and a control module 30.
The first determining module 10 is configured to determine a delay time for executing an upshift after a FastOff function of the vehicle is activated according to a target gear and a target gear synchronous rotation speed after the FastOff function of the vehicle is activated. The second determination module 20 is configured to determine a reset time according to the engine speed and the accelerator pedal opening if it is detected that the accelerator pedal opening is greater than zero and the accelerator pedal gradient is less than a first set limit value during the delay time decrementing process. The control module 30 is configured to reduce the remaining time of the delay time and the reset time to obtain a suppressed upshift time, and execute an upshift action when the suppressed upshift time is decreased to zero.
According to an embodiment of the present invention, the first determining module 10 is specifically configured to: and when the target gear is smaller than the highest gear of the gearbox, the gradient of the accelerator pedal is smaller than a second set limit value, the opening of the accelerator pedal is smaller than a preset opening, and the synchronous rotating speed of the target gear is larger than the rotating speed of the current sliding upshift point, determining to activate the FastOff function of the vehicle.
According to an embodiment of the present invention, the first determining module 10 determines the delay time for executing the upshift after the FastOff function is activated according to the target gear and the target gear synchronous speed, and is specifically configured to: and inquiring a configurable three-dimensional graph according to the target gear and the target gear synchronous rotating speed to obtain delay time, wherein the three-dimensional graph is a target gear synchronous rotating speed-target gear-delay time table.
According to an embodiment of the present invention, the control module 30 is further configured to freeze the delay time to maintain the upshift inhibiting function if the detected braking pressure is greater than the preset pressure limit or the lateral acceleration of the entire vehicle is greater than the acceleration threshold during the delay time decrement process.
According to an embodiment of the invention, the control module 30 is further configured to, after performing the upshift, continue to determine a new delay time based on the target gear and the target gear synchronous speed after the upshift if the target gear synchronous speed after the upshift is still greater than the current coast upshift point speed.
According to one embodiment of the invention the control module 30 is further arranged to control the vehicle to exit the FastOff function if the target gear is detected as the highest gear of the gearbox before performing the upshift action.
According to an embodiment of the invention, the control module 30 is further adapted to, before performing the upshift action, control the vehicle to exit the FastOff function if the target gear synchronous speed is detected to be equal to or less than the current coast upshift point speed.
It should be noted that details that are not disclosed in the control device for delayed upshift after a vehicle release door according to the embodiment of the present invention are referred to details that are disclosed in the control method for delayed upshift after a vehicle release door according to the embodiment of the present invention, and are not described herein again.
According to the control device for delaying the upshift after the throttle of the vehicle is released, after a FastOff function of the vehicle is activated, a first determining module determines the delay time for executing the upshift after the FastOff function is activated according to a target gear and a target gear synchronous rotating speed; in the process of decreasing the delay time, if the opening degree of the accelerator pedal is detected to be larger than zero and the gradient of the accelerator pedal is detected to be smaller than a first set limit value, a second determining module determines reset time according to the rotating speed of the engine and the opening degree of the accelerator pedal; and the control module is used for reducing the residual time and the reset time of the delay time to obtain the restraint upshift time, and executing the upshift action when the restraint upshift time is decreased to zero. Therefore, the device can control the function of inhibiting the upshifting after the throttle is released more flexibly, is convenient for control the range of the working rotating speed of the engine with the function of inhibiting the upshifting, avoids the problem of unacceptable engine noise and can also effectively avoid frequent gear shifting of the vehicle.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A method of controlling a delayed upshift after a vehicle fuel door is released, comprising:
after a FastOff function of a vehicle is activated, determining delay time for executing an upshift after the FastOff function is activated according to a target gear and a target gear synchronous rotating speed;
in the process of decreasing the delay time, if the opening degree of an accelerator pedal is detected to be larger than zero and the gradient of the accelerator pedal is detected to be smaller than a first set limit value, determining reset time according to the rotation speed of the engine and the opening degree of the accelerator pedal;
reducing the residual time of the delay time and the reset time to obtain the gear-up restraining time;
executing an upshift action when the inhibition upshift time is decremented to zero;
activating the FastOff function of a vehicle, comprising:
when the target gear is smaller than the highest gear of a gearbox, the gradient of an accelerator pedal is smaller than a second set limit value, the opening of the accelerator pedal is smaller than a preset opening, and the synchronous rotating speed of the target gear is larger than the rotating speed of a current sliding upshift point, determining to activate the FastOff function of the vehicle;
and in the process of descending the delay time, if the fact that the brake pressure is greater than a preset pressure limit value or the transverse acceleration of the whole vehicle is greater than an acceleration threshold value is detected, freezing the delay time to keep the function of restraining the upshift.
2. The method for controlling a delayed upshift after a vehicle release valve according to claim 1, wherein determining a delay time for performing an upshift after the FastOff function is activated based on a target gear and a target gear synchronous rotation speed comprises:
and inquiring a configurable three-dimensional graph according to the target gear and the target gear synchronous rotating speed to obtain the delay time, wherein the three-dimensional graph is a target gear synchronous rotating speed-target gear-delay time table.
3. The method of claim 1, wherein after the upshift is performed, if the target gear synchronous rotational speed after the upshift is still greater than the current coast upshift point rotational speed, continuing to determine a new delay time based on the target gear and the target gear synchronous rotational speed after the upshift.
4. A control method for delayed upshifts after releasing the throttle of a vehicle according to claim 1, characterised in that before an upshift action is performed, the vehicle is controlled to exit the FastOff function if it is detected that the target gear is the highest gear of the gearbox.
5. The method of claim 1, wherein the vehicle is controlled to exit the FastOff function if the target range synchronization speed is detected to be less than or equal to a current coast upshift point speed before an upshift action is performed.
6. A computer-readable storage medium, characterized in that a control program of a vehicle late post-accelerator upshift is stored thereon, which when executed by a processor, implements the control method of a vehicle late post-accelerator upshift as recited in any one of claims 1-5.
7. An automatic transmission characterized by comprising a memory, a processor and a control program for delayed after-release upshift of a vehicle stored on the memory and executable on the processor, wherein the processor implements the control method for delayed after-release upshift of a vehicle according to any one of claims 1-5 when executing the control program for delayed after-release upshift of a vehicle.
8. A control device for delaying an upshift after a vehicle releases a throttle, comprising:
the first determining module is used for determining the delay time for executing the upshifting after the FastOff function of the vehicle is activated according to the target gear and the target gear synchronous rotating speed; activating the FastOff function of a vehicle, comprising: when the target gear is smaller than the highest gear of the gearbox, the gradient of an accelerator pedal is smaller than a second set limit value, the opening of the accelerator pedal is smaller than a preset opening, and the synchronous rotating speed of the target gear is larger than the rotating speed of the current sliding upshift point, determining to activate the FastOff function of the vehicle;
the second determination module is used for determining reset time according to the engine speed and the accelerator pedal opening degree if the accelerator pedal opening degree is detected to be larger than zero and the accelerator pedal gradient is detected to be smaller than a first set limit value in the process of decreasing the delay time;
and the control module is used for shortening the residual time of the delay time and the reset time to obtain the inhibition upshift time, executing an upshift action when the inhibition upshift time is decreased to zero, and freezing the delay time to keep the inhibition upshift function if the brake pressure is detected to be greater than a preset pressure limit value or the transverse acceleration of the whole vehicle is detected to be greater than an acceleration threshold value in the delay time decreasing process.
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| CN202110591653.1A CN113513583B (en) | 2021-05-28 | 2021-05-28 | Control method and device for delaying gear-up after vehicle fuel door is released and automatic transmission |
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| JP2009047216A (en) * | 2007-08-17 | 2009-03-05 | Isuzu Motors Ltd | Speed change controller of vehicular transmission |
| CN103998830B (en) * | 2011-11-18 | 2016-01-27 | 加特可株式会社 | The control gear of automatic transmission |
| US8972132B2 (en) * | 2013-05-24 | 2015-03-03 | GM Global Technology Operations LLC | Method of controlling a transmission of a vehicle |
| CN111692330A (en) * | 2020-05-27 | 2020-09-22 | 中国北方车辆研究所 | Driving intention-based automatic transmission gear shifting rule correction method |
| CN112413108A (en) * | 2020-10-19 | 2021-02-26 | 东风汽车集团有限公司 | Gear shifting control method, device and system based on automatic gearbox and storage medium |
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