CN112413108A - Gear shifting control method, device and system based on automatic gearbox and storage medium - Google Patents
Gear shifting control method, device and system based on automatic gearbox and storage medium Download PDFInfo
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- CN112413108A CN112413108A CN202011120809.XA CN202011120809A CN112413108A CN 112413108 A CN112413108 A CN 112413108A CN 202011120809 A CN202011120809 A CN 202011120809A CN 112413108 A CN112413108 A CN 112413108A
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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
- F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
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Abstract
The embodiment of the specification discloses a gear shifting control method, a gear shifting control device, a gear shifting control system and a storage medium based on an automatic gearbox, wherein the method comprises the following steps: acquiring vehicle parameter information, wherein the vehicle parameter information comprises accelerator opening information, vehicle speed information and engine rotating speed information; determining a target gear through a preset gear shifting map according to accelerator opening information and vehicle speed information in the vehicle parameter information; determining the operation intention of a driver according to the accelerator opening information and the engine speed information in the vehicle parameter information; and executing corresponding gear shifting control operation according to the driver operation intention and the target gear, wherein the gear shifting control operation comprises the inhibition of the gear shifting operation. In the scheme, in the process of carrying out accelerator release or brake operation for a short time when a driver is in an emergency or encounters an obstacle in the driving process of the vehicle, the intention of the driver not wanting to upshift can be identified to inhibit gear change, so that the problem of frequent gear change is solved, and the driving experience is improved.
Description
Technical Field
The embodiment of the specification relates to the technical field of automobiles, in particular to a gear shifting control method, a gear shifting control device, a gear shifting control system and a storage medium based on an automatic gearbox.
Background
With the development of vehicle technology, the automatic transmission becomes a standard configuration in a vehicle, and during the running process of the vehicle, the automatic transmission performs an upshift operation on a vehicle gear through a built-in transmission control component. In the normal driving process, the automatic transmission generally determines whether gear shifting is required by determining the accelerator opening and the vehicle speed.
In actual driving, when a vehicle encounters an emergency or an obstacle during normal acceleration, the driver will usually quickly release the accelerator or brake, and after the situation is eliminated, the driver will step on the accelerator pedal again to continue driving in the previous acceleration state. Generally, after the automatic transmission detects the driving operation of a driver, the automatic transmission executes an upshift operation based on the operation and then downshifts in a short time, so that the situation that the gear of the vehicle frequently changes in a short time is caused, the driving experience of a user is influenced, the rotation speed of the engine of the driver is reduced when the driver switches from acceleration to deceleration due to the fact that the transmission directly upshifts in the process, the high-rotation-speed brake of the engine cannot be fully utilized in the braking process, and the driving safety of the vehicle is reduced. Therefore, how to effectively control the gear shifting operation of the automatic transmission is a problem which needs to be solved urgently at present.
Disclosure of Invention
The embodiment of the specification provides a gear shifting control method, a gear shifting control device, a gear shifting control system and a storage medium based on an automatic gearbox.
In a first aspect, the present specification provides a method for controlling gear shifting based on an automatic transmission, the method comprising:
acquiring vehicle parameter information, wherein the vehicle parameter information comprises accelerator opening information, vehicle speed information and engine rotating speed information;
determining a target gear through a preset gear shifting map according to accelerator opening information and vehicle speed information in the vehicle parameter information, wherein the preset gear shifting map comprises a corresponding relation among the vehicle speed, the accelerator opening and the gear;
determining a driver operation intention according to accelerator opening information and engine speed information in the vehicle parameter information, wherein the driver operation intention is used for determining whether the upshifting operation of the automatic gearbox needs to be inhibited;
and executing corresponding gear shifting control operation according to the driver operation intention and the target gear, wherein the gear shifting control operation comprises the inhibition of the gear shifting operation.
Optionally, before determining the driver's operation intention according to the accelerator opening degree information and the engine speed information in the vehicle parameter information, the method further includes:
setting engine rotating speed limit values corresponding to different gears to obtain a gear rotating speed relation;
the determining of the operation intention of the driver according to the accelerator opening information and the engine speed information in the vehicle parameter information comprises the following steps:
determining whether the gear-up restraining condition is met or not according to the gear speed relation and the engine speed;
if yes, determining a driver operation intention according to the accelerator opening information and a target accelerator opening change rate threshold value, wherein both the accelerator opening and the target accelerator opening change rate threshold value in the accelerator opening information are negative numbers, and the driver operation intention comprises gear-up inhibition and gear-up allowance;
optionally, the determining whether the upshift inhibiting condition is met according to the gear speed relationship and the engine speed includes:
determining a corresponding engine speed limit value from the gear speed relation according to the target gear information;
determining whether the current engine speed does not exceed the engine speed limit value according to the engine speed information;
if the condition of restraining the upshifting is determined to be met according to the gear speed relation and the engine speed, determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold value, wherein the method comprises the following steps:
and if the current engine rotating speed is determined not to exceed the engine rotating speed limit value according to the engine rotating speed information, determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold value.
Optionally, before determining the driver's operation intention according to the accelerator opening information and the target accelerator opening change rate threshold, the method further includes:
setting throttle opening change rate thresholds corresponding to different gears to obtain a throttle opening change rate table;
determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold, wherein the method comprises the following steps:
determining a corresponding throttle opening change rate from the throttle opening change rate table according to the target gear, and using the corresponding throttle opening change rate as the target throttle opening change rate threshold;
calculating the accelerator opening change rate according to the accelerator opening difference value determined in the accelerator opening information and an accelerator change time period, wherein the accelerator change time period is a time period when the accelerator pedal changes in external pressure to cause the pedal opening to change;
when the throttle opening change rate is smaller than or equal to the target throttle opening change rate threshold, determining that the driver operation intention is to inhibit an upshift operation;
when the throttle opening change rate is greater than the target throttle opening change rate threshold, determining that the driver operation intention is to allow an upshift operation.
Optionally, before the corresponding shift control operation is performed according to the driver's operation intention and the target gear, the method further includes:
detecting whether a braking operation is received;
when the braking operation is detected, it is determined that the driver's operation intention is to suppress an upshift operation.
Optionally, the executing, according to the driver operation intention and the target gear, a corresponding shift control operation includes:
when it is determined that the driver's operation intention is to suppress an upshift, suppressing an upshift operation of the transmission;
when it is determined that the driver's operation intention is to allow an upshift, an upshift operation of the transmission is allowed.
Optionally, before inhibiting the upshift operation of the transmission when it is determined that the driver's operation intention is to inhibit the upshift, the method further comprises:
setting the inhibition upshift duration corresponding to different gears to obtain an inhibition duration relation table;
determining corresponding inhibition upshift duration from the inhibition duration relation table according to the target gear;
and when it is determined that the driver's operation intention is to suppress an upshift, then suppressing an upshift operation of the transmission, includes:
and when it is determined that the driver's operation intention is to suppress the upshift, suppressing the upshift operation of the transmission for a period corresponding to the upshift suppressing period.
Optionally, after suppressing the upshift operation of the transmission for a period corresponding to the upshift suppressing period when it is determined that the driver's operation intention is to suppress the upshift, the method further includes:
when a gear-up instruction is detected, ignoring the gear-up instruction in a time period corresponding to the gear-up inhibiting duration, wherein the gear-up instruction is an operation instruction for gear-up issued by a user;
and when a brake braking instruction is detected, continuously executing the gear-up restraining operation after the gear-up restraining duration is exceeded.
In a second aspect, the present specification provides a shift control device based on an automatic transmission, including:
the system comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring vehicle parameter information, and the vehicle parameter information comprises accelerator opening information, vehicle speed information and engine rotating speed information;
the first determining unit is used for determining a target gear through a preset gear shifting map according to accelerator opening information and vehicle speed information in the vehicle parameter information, wherein the preset gear shifting map comprises the corresponding relation among the vehicle speed, the accelerator opening and the gear;
a second determination unit, configured to determine a driver operation intention according to accelerator opening information and engine speed information in the vehicle parameter information, where the driver operation intention is used to determine whether an upshift operation of the automatic transmission needs to be suppressed;
and the execution unit is used for executing corresponding gear shifting control operation according to the driver operation intention and the target gear, and the gear shifting control operation comprises the inhibition of the gear-shifting operation.
Optionally, the apparatus further comprises:
the setting unit is used for setting engine rotating speed limit values corresponding to different gears to obtain a gear rotating speed relation;
the second determination unit includes:
the first determining module is used for determining whether a gear upshift inhibiting condition is met or not according to the gear rotating speed relation and the engine rotating speed;
and the second determining module is used for determining a driver operation intention according to the accelerator opening information and a target accelerator opening change rate threshold value if the condition of inhibiting the upshift is determined to be met according to the gear speed relation and the engine speed, wherein the accelerator opening in the accelerator opening information and the target accelerator opening change rate threshold value are negative numbers, and the driver operation intention comprises the inhibition upshift and the allowable upshift.
Optionally, the first determining module includes:
the first determining submodule is used for determining a corresponding engine speed limit value from the gear speed relation according to the target gear information;
the second determining submodule is used for determining whether the current engine speed does not exceed the engine speed limit value according to the engine speed information;
the second determining module is specifically configured to determine the driver's operation intention according to the accelerator opening information and a target accelerator opening change rate threshold if it is determined that the current engine speed does not exceed the engine speed limit according to the engine speed information.
Optionally, the second determining unit further includes:
the setting module is used for setting throttle opening change rate thresholds corresponding to different gears to obtain a throttle opening change rate table;
the second determining module includes:
the first determining submodule determines a corresponding throttle opening change rate from the throttle opening change rate table according to the target gear, and the corresponding throttle opening change rate is used as a target throttle opening change rate threshold value;
the calculation submodule is used for calculating the accelerator opening change rate according to the accelerator opening difference value determined in the accelerator opening information and the accelerator change time period, wherein the accelerator change time period is the time period of the pedal opening change caused by the change of the external pressure of an accelerator pedal;
a second determination submodule for determining that the driver operation intention is to suppress an upshift operation when the accelerator opening change rate is less than or equal to the target accelerator opening change rate threshold value;
a third determination submodule for determining that the driver operation intention is to allow an upshift operation when the accelerator opening change rate is greater than the target accelerator opening change rate threshold.
Optionally, the apparatus further comprises:
the detection unit is used for detecting whether a brake operation is received;
a third determination unit configured to determine that the driver's operation intention is to suppress an upshift operation when the brake operation is detected.
Optionally, the execution unit includes:
a first execution module for inhibiting an upshift operation of the transmission when it is determined that the driver's operation intention is to inhibit the upshift;
and the second execution module is used for allowing the gear-shifting operation of the gearbox when the driver operation intention is determined to be the gear-shifting allowance.
Optionally, the execution unit further includes:
the setting module is used for setting the inhibition upshift duration corresponding to different gears to obtain an inhibition duration relation table;
the determining module is used for determining the corresponding inhibition upshift duration from the inhibition duration relation table according to the target gear;
the first executing module is specifically configured to, when it is determined that the driver's operation intention is to suppress an upshift, suppress an upshift operation of the transmission for a period corresponding to the upshift suppressing period.
Optionally, the execution unit further includes:
the third execution module is used for ignoring the gear-up instruction in a time period corresponding to the gear-up inhibiting duration when the gear-up instruction is detected, wherein the gear-up instruction is an operation instruction for gear-up issued by a user;
and the fourth execution module is used for continuously executing the gear-up inhibiting operation after the gear-up inhibiting duration is exceeded when a brake braking instruction is detected.
In a third aspect, embodiments of the present disclosure provide an automatic transmission-based shift control system, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor performs the steps of any of the methods described above.
In a fourth aspect, the present specification provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of any of the above methods.
The embodiment of the specification has the following beneficial effects:
in the embodiment of the present specification, the above method, apparatus, system and storage medium for shift control based on an automatic transmission are capable of determining a target gear by a preset shift map according to accelerator opening information and vehicle speed information in the vehicle parameter information after obtaining the vehicle parameter information, determining a driver operation intention according to the accelerator opening information and engine speed information in the vehicle parameter information, and finally executing a corresponding shift control operation according to the driver operation intention and the target gear, wherein the shift control operation includes an original upshift inhibiting operation, so that it is possible to ensure that an upshift operation of the automatic transmission is inhibited when the upshift operation is not required, thereby avoiding frequent upshifting and downshifting processes of the automatic transmission in a short time in the prior art, and reducing unnecessary upshift operations, therefore, when a driver releases the accelerator or brakes for a short time due to an emergency or an obstacle in the driving process of the vehicle, the intention of the driver not wanting to upshift can be recognized, the problem of frequent gear change is solved, the driving experience is improved, and frequent gear shifting is not needed any more in a short time, so that the driver can fully utilize the high-rotating-speed braking of the engine when switching from acceleration to deceleration, the safety of the vehicle in the driving process can be ensured, and the effective control on the gear shifting operation process of the automatic gearbox is realized.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flowchart of a shift control method for an automatic transmission according to a first aspect of an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of an automatic transmission-based shift control device provided in a second aspect of an embodiment of the present disclosure;
fig. 3 is a schematic diagram of another automatic transmission-based shift control device provided in a second aspect of the embodiment of the present disclosure.
Detailed Description
In order to better understand the technical solutions, the technical solutions of the embodiments of the present specification are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations of the technical solutions of the present specification, and the technical features of the embodiments and embodiments of the present specification may be combined with each other without conflict.
As shown in fig. 1, a flowchart of a method for controlling a gear shift based on an automatic transmission according to an embodiment of the present disclosure is provided, and the method includes the following steps:
101. and acquiring vehicle parameter information.
The vehicle parameter information comprises accelerator opening information, vehicle speed information and engine rotating speed information.
102. And determining a target gear through a preset gear shifting map according to the accelerator opening information and the vehicle speed information in the vehicle parameter information.
The preset gear shifting map comprises the corresponding relation among the vehicle speed, the accelerator opening and the gears.
103. And determining the operation intention of the driver according to the accelerator opening information and the engine speed information in the vehicle parameter information.
Wherein the driver operation intention is used to determine whether an upshift operation of the automatic transmission needs to be suppressed.
104. And executing corresponding gear shifting control operation according to the driver operation intention and the target gear.
Wherein the shift control operation includes inhibiting an upshift operation.
In the embodiment of the present specification, the preset shift map is a three-dimensional map based on the relationship among the vehicle speed, the accelerator opening and the gear position, so that after the accelerator opening and the vehicle speed are obtained in step 101, the corresponding gear position, i.e. the target gear position, can be actually determined, and at the same time, the operation intention that the driver wants to execute, i.e. the driver operation intention, can be determined according to the accelerator opening information and the engine speed, wherein the driver operation intention can be understood as whether the user wants to inhibit the upshift operation, because there is a behavior of reducing the accelerator or the brake for a short time due to a sudden situation or an obstacle in the actual driving process, the driver does not actually shift gears, but needs to adjust the vehicle speed for a short time and then eliminate the sudden situation or the obstacle and then continuously maintain the previous acceleration state, and at this time, the upshift operation of the transmission in this situation needs to be inhibited, therefore, in this specification, it is necessary to determine the actual intention of the driver, i.e., the driver's operation intention, based on the method described in step 103, so as to perform the subsequent shift control operation.
In this embodiment, since it is necessary to determine whether the current engine speed condition meets the condition that the upshift needs to be suppressed by the rotation speed of the target gear in the process of determining the driver's operation intention, before determining the driver's operation intention according to the accelerator opening degree information and the engine speed information in the vehicle parameter information, the method may further include: and setting engine rotating speed limit values corresponding to different gears to obtain a gear rotating speed relation.
In this way, the process of determining the operation intention of the driver according to the accelerator opening degree information and the engine speed information in the vehicle parameter information may specifically include:
determining whether the gear-up restraining condition is met or not according to the gear speed relation and the engine speed;
and if so, determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold value. The accelerator opening and the target accelerator opening change rate threshold in the accelerator opening information are negative numbers, and the driver operation intention comprises the inhibition of the upshift and the permission of the upshift.
Further, the determining whether the upshift inhibiting condition is met according to the gear speed relationship and the engine speed may specifically be performed by:
firstly, determining a corresponding engine speed limit value from the gear speed relation according to the target gear information; then, it is determined whether the current engine speed does not exceed the engine speed limit based on the engine speed information.
For example, taking a 6-speed transmission as an example, the engine speed limits for different gears are as follows:
| gear position | 1 | 2 | 3 | 4 | 5 | 6 |
| nlimit | 2000 | 2500 | 3000 | 3200 | 3500 | 3500 |
The engine speed limit value at each gear set in different gears is nlimit (unit is rpm).
For example, when the target gear is determined to be 3, the engine speed is 2900rpm, and when the accelerator is quickly released or the brake is stepped on in 3, the current engine speed can be determined to meet the condition of inhibiting the upshift because the engine speed does not exceed the engine speed limit value (2900<3000, unit rpm) in the gear.
It should be noted that, in practical applications, in order to avoid the problem of excessive rotation speed and loud noise caused by the suppression of the upshift, when the engine rotation speed is higher than the set engine rotation speed limit value, it means that the suppression of the upshift is not needed, and similarly, as shown in the above table by way of example, when the current target gear is 3 gears and the engine rotation speed is 3200rpm, and when the 3 gears rapidly release the accelerator or step on the brake, because the engine rotation speed exceeds the engine rotation speed limit value at the gear, it means that the vehicle does not need to suppress the upshift in practice, and therefore, the subsequent determination step of suppressing the upshift is not needed.
In this way, if it is determined that the upshift inhibiting condition is met according to the gear speed relationship and the engine speed, the driver's operation intention is determined according to the accelerator opening information and the target accelerator opening change rate threshold, which may be specifically: and if the current engine rotating speed is determined not to exceed the engine rotating speed limit value according to the engine rotating speed information, determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold value.
Further, before determining the driver's operation intention according to the accelerator opening information and the target accelerator opening change rate threshold, the method may further include:
and setting throttle opening change rate thresholds corresponding to different gears to obtain a throttle opening change rate table. The accelerator opening degree change rate table comprises different accelerator opening degree change rates corresponding to different gears. By setting the throttle opening degree change rate threshold values of different gears, the user operation intention corresponding to the change of the accelerator pedal can be defined in a numerical form.
Determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold, wherein the method comprises the following steps:
firstly, according to the target gear, determining a corresponding throttle opening change rate from the throttle opening change rate table as the target throttle opening change rate threshold.
And then, calculating the accelerator opening change rate according to the accelerator opening difference value determined in the accelerator opening information and an accelerator change time period, wherein the accelerator change time period is a time period of pedal opening change caused by the change of the external pressure of an accelerator pedal.
Finally, comparing the opening degree change rate with the opening degree change rate threshold corresponding to the target gear according to the opening degree change rate, wherein the following two conditions exist based on the comparison result: wherein when the throttle opening change rate is less than or equal to the target throttle opening change rate threshold, then determining that the driver operation intention is to inhibit an upshift operation; when the throttle opening change rate is greater than the target throttle opening change rate threshold, determining that the driver operation intention is to allow an upshift operation.
In the above step, a specific process of calculating the accelerator opening change rate according to the accelerator opening information may be: assuming that the sampling period of the accelerator opening signal can be set to 10ms, the throttle opening change rate can be calculated according to the following formula in the calculation process:
wherein A is the throttle opening change rate, MeasurenFor the nth sampling value of the throttle opening, Measuren-kIs the sampling value of the throttle opening degree n-k times, tnThe time of the nth sampling of the throttle opening, tn-kThe unit of the throttle opening change rate is%/10 ms, namely the throttle opening change percentage in 10ms time.
In addition, when the above steps compare the throttle opening change rate with the opening change rate threshold corresponding to the target gear and determine the corresponding driver operation intention based on the comparison result, the process may be as follows:
the throttle opening change rate threshold R (in%/10 ms) for each gear is set as follows:
| gear position | 1 | 2 | 3 | 4 | 5 | 6 |
| R | -400 | -300 | -230 | -200 | -180 | -160 |
When the throttle opening change rate is smaller than the set throttle opening change rate, it can be actually understood that the driver performs a quick throttle release operation, for example, when the target gear is 3 gears, when the driver releases the throttle quickly, if the calculated throttle opening change rate is-280%/10 ms and is smaller than the set threshold value of 3 gears throttle opening change rate (-230%/10 ms), the condition of the upshift inhibiting strategy is satisfied, so that the driver can be identified to encounter obstacles, curves, other dangerous situations, and the like, and the intention of urgent deceleration is needed, thereby determining that the driver intends to inhibit the upshift operation.
Further, in the embodiments described herein, when it is determined that the driver's operation intention is to suppress the upshift operation or to permit the upshift operation, it may be characterized by setting the target flag. For example, when the target flag is active, the driver's operation intention is represented as suppressing the upshift operation, whereas when the target flag is inactive, the driver's operation intention is represented as allowing the upshift operation. Of course, in practical applications, the specific manner of characterizing the operation intention of the driver includes, but is not limited to, the above manner, and the specific manner may be selected according to actual needs.
In addition, in practical applications, there may be a case where a driver performs a braking operation on the vehicle, and therefore before the corresponding shift control operation is performed according to the driver's operation intention and the target gear, the method further includes:
detecting whether a braking operation is received;
when the braking operation is detected, it is determined that the driver's operation intention is to suppress an upshift operation.
The driver operation intention is directly determined to be the inhibition of the upshifting operation through the braking operation, so that the situation that the unnecessary upshifting influences the driving safety when the driver brakes in an emergency is avoided.
Further, the executing the corresponding gear-shifting control operation according to the driver operation intention and the target gear comprises:
when it is determined that the driver's operation intention is to suppress an upshift, suppressing an upshift operation of the transmission;
when it is determined that the driver's operation intention is to allow an upshift, an upshift operation of the transmission is allowed.
Further, before inhibiting an upshift operation of the transmission when it is determined that the driver's operation intention is to inhibit an upshift, the method further comprises:
setting the inhibition upshift duration corresponding to different gears to obtain an inhibition duration relation table;
determining corresponding inhibition upshift duration from the inhibition duration relation table according to the target gear;
after the upshift inhibiting period is determined, a subsequent upshift inhibiting operation may be performed based on the upshift inhibiting period, that is, when it is determined that the driver operation intention is to inhibit an upshift, the upshift operation of the transmission is inhibited, specifically: and when it is determined that the driver's operation intention is to suppress the upshift, suppressing the upshift operation of the transmission for a period corresponding to the upshift suppressing period.
Based on the method described in the above steps, the process performed by the method can be performed as follows:
when the target flag is changed from inactive to active or a braking operation is detected, it may be determined that the driver's operation intention is to suppress the upshift operation, and in addition, different suppression upshift times T (in units of 10ms) are set according to different gear positions, as follows:
| gear position | 1 | 2 | 3 | 4 | 5 | 6 |
| T | 150 | 200 | 300 | 400 | 450 | 500 |
And determining that the inhibition upshift duration is 4000ms, namely 4 seconds when the target gear is 4 gears, and inhibiting the transmission upshift operation within 4 seconds when the inhibition upshift operation is executed.
Further, other operating actions of the driver, such as braking or stepping on the accelerator, may also be present during the suppression of the upshift during driving. At this time, after suppressing the upshift operation of the transmission for a period corresponding to the upshift suppressing period when it is determined that the driver's operation intention is to suppress the upshift, the method further includes:
when a gear-up instruction is detected, ignoring the gear-up instruction in a time period corresponding to the gear-up inhibiting duration, wherein the gear-up instruction is an operation instruction for gear-up issued by a user;
and when a brake braking instruction is detected, continuously executing the gear-up restraining operation after the gear-up restraining duration is exceeded.
For example, when the inhibit upshift time >0, this process may be understood as a buffer period of upshift delay during which the inhibit upshift time is decremented once per program cycle (10ms cycles); when the inhibition upshift time is equal to 0, the driver is indicated as a normal deceleration process, the upshift delay is finished, and the inhibition upshift flag is set to be invalid. And when the current gear is 4 gears and the accelerator is loosened, calculating an upshift request according to a gear shifting map, and setting the delay upshift time to be 4s when the suppression upshift flag bit is effective or the brake is effective. If the driver has an acceleration intention (acceleration operation) within the 4s, the current gear can be kept based on the upshift inhibiting operation, gear shifting is not executed, multiple gear shifting within a short time is avoided, and the subsequent acceleration intention of the driver can be responded quickly; if the driver does not have the intention of acceleration within 4s and does not step on the brake, the normal deceleration process can be judged, after 4s, the gear-up flag bit is inhibited from being invalid, and the automatic gearbox can perform gear-up according to the normal control logic; if the driver does not have the intention of acceleration within 4s and presses the brake, the delay time is always 4s, and the target flag for suppressing the upshift is always in an effective state.
To sum up, the embodiments of the present disclosure provide a shift control method based on an automatic transmission, which is capable of determining a target gear according to accelerator opening information and vehicle speed information in the vehicle parameter information after obtaining vehicle parameter information, determining a driver operation intention according to the accelerator opening information and engine speed information in the vehicle parameter information, and finally executing a corresponding shift control operation according to the driver operation intention and the target gear The method can identify the intention of a driver not wanting to upshift, thereby solving the problem of frequent gear change, improving the driving experience, and can ensure the safety of the vehicle in the driving process by fully utilizing the high-rotating-speed braking of the engine when the driver switches from acceleration to deceleration because the driver does not need to frequently shift gears in short time, thereby realizing the effective control of the gear shifting operation process of the automatic gearbox.
In a second aspect, based on the same inventive concept, the present specification provides a shift control device based on an automatic transmission, which implements the method according to the first aspect, and specifically, with reference to fig. 2, the device includes:
the acquiring unit 21 may be configured to acquire vehicle parameter information, where the vehicle parameter information includes accelerator opening information, vehicle speed information, and engine speed information;
the first determining unit 22 may be configured to determine a target gear by using a preset gear shift map according to accelerator opening information and vehicle speed information in the vehicle parameter information acquired by the acquiring unit 21, where the preset gear shift map includes a corresponding relationship among a vehicle speed, an accelerator opening, and a gear;
a second determination unit 23, which may be configured to determine a driver's operation intention according to the accelerator opening degree information and the engine speed information in the vehicle parameter information, wherein the driver's operation intention is used for determining whether the upshift operation of the automatic transmission needs to be inhibited;
the execution unit 24 may be configured to execute a corresponding shift control operation, including suppressing an upshift operation, according to the driver's operation intention determined by the second determination unit 23 and the target gear determined by the first determination unit 22.
Optionally, as shown in fig. 3, the apparatus further includes:
a setting unit 25, which may be configured to set engine speed limit values corresponding to different gears, resulting in a gear speed relationship, such that the second determining unit 23 determines the driver's operation intention based on the gear speed relationship;
the second determination unit 23 includes:
a first determination module 231, which may be configured to determine whether an upshift inhibiting condition is met according to the gear speed relationship and an engine speed;
the second determining module 232 may be configured to determine, if the first determining module 231 determines that the upshift inhibiting condition is met according to the gear rotation speed relationship and the engine rotation speed, a driver operation intention according to the accelerator opening information and a target accelerator opening change rate threshold, where the accelerator opening in the accelerator opening information and the target accelerator opening change rate threshold are both negative numbers, and the driver operation intention includes an upshift inhibiting condition and an upshift permitting condition.
Optionally, as shown in fig. 3, the first determining module 231 includes:
a first determining submodule 2311, configured to determine a corresponding engine speed limit value from the gear speed relationship according to the target gear information;
a second determination submodule 2312 operable to determine from said engine speed information whether a current engine speed does not exceed said engine speed limit determined by said first determination submodule 2311;
the second determining module 232 may be specifically configured to determine the driver operation intention according to the accelerator opening information and a target accelerator opening change rate threshold if it is determined that the current engine speed does not exceed the engine speed limit according to the engine speed information.
Optionally, as shown in fig. 3, the second determining unit 23 further includes:
the setting module 233 may be configured to set accelerator opening change rate thresholds corresponding to different gears to obtain an accelerator opening change rate table;
the second determining module 232 includes:
a first determining sub-module 2321, configured to determine, according to the target gear, a corresponding throttle opening change rate from the throttle opening change rate table as the target throttle opening change rate threshold;
the calculating submodule 2322 may be configured to calculate a throttle opening change rate according to the throttle opening difference determined in the throttle opening information and a throttle change time period, where the throttle change time period is a time period when the pedal opening changes due to a change of an accelerator pedal in an external pressure;
a second determination submodule 2323, configured to determine that the driver operation intention is to inhibit an upshift operation when the accelerator opening change rate obtained by the calculation submodule 2322 is less than or equal to the target accelerator opening change rate threshold determined by the first determination submodule 2321;
a third determination submodule 2324 may be configured to determine that the driver operation intention is to allow an upshift operation when the throttle opening change rate obtained by the calculation submodule 2322 is greater than the target throttle opening change rate threshold determined by the first determination submodule 2321.
Optionally, as shown in fig. 3, the apparatus further includes:
a detection unit 26, which can be used for detecting whether a braking operation is received;
a third determination unit 27, which may be configured to determine that the driver's operation intention is to suppress an upshift operation when the detection unit 26 detects the brake operation.
Optionally, as shown in fig. 3, the execution unit 24 includes:
a first executing module 241, configured to inhibit an upshift operation of the gearbox when it is determined that the driver's operation intention is to inhibit an upshift;
the second execution module 242 may be configured to allow an upshift of the gearbox when it is determined that the driver operation intention is to allow an upshift.
Optionally, as shown in fig. 3, the execution unit 24 further includes:
the setting module 243 may be configured to set the upshift inhibiting durations corresponding to different gears, so as to obtain an inhibiting duration relation table;
a determining module 244, configured to determine a corresponding upshift inhibiting time duration from the relationship table of the inhibition time durations obtained by the setting module 243 according to the target gear;
the first performing module 241 may be specifically configured to suppress the upshift operation of the transmission for a period corresponding to the upshift suppressing period determined by the determining module 244 when it is determined that the driver's operation intention is to suppress the upshift.
Optionally, as shown in fig. 3, the execution unit 24 further includes:
the third executing module 245, configured to ignore the upshift instruction in a time period corresponding to the upshift inhibiting duration when the upshift instruction is detected, where the upshift instruction is an operation instruction issued by a user for upshifting;
the fourth execution module 246 may be configured to continue executing the inhibit upshift operation beyond the inhibit upshift duration when the brake braking command is detected.
In a third aspect, based on the same inventive concept as the automatic transmission-based gear shift control method in the foregoing embodiments, the present specification further provides an automatic transmission-based gear shift control system, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the foregoing automatic transmission-based gear shift control methods when executing the program.
In a fourth aspect, based on the inventive concept of the automatic transmission-based shift control method as in the previous embodiments, the present specification further provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of any one of the above-described automatic transmission-based shift control methods.
The description has been presented with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the description. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present specification have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all changes and modifications that fall within the scope of the specification.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present specification without departing from the spirit and scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, the specification is intended to include such modifications and variations.
Claims (10)
1. A gear shift control method based on an automatic gearbox is characterized by comprising the following steps:
acquiring vehicle parameter information, wherein the vehicle parameter information comprises accelerator opening information, vehicle speed information and engine rotating speed information;
determining a target gear through a preset gear shifting map according to accelerator opening information and vehicle speed information in the vehicle parameter information, wherein the preset gear shifting map comprises a corresponding relation among the vehicle speed, the accelerator opening and the gear;
determining a driver operation intention according to accelerator opening information and engine speed information in the vehicle parameter information, wherein the driver operation intention is used for determining whether the upshifting operation of the automatic gearbox needs to be inhibited;
and executing corresponding gear shifting control operation according to the driver operation intention and the target gear, wherein the gear shifting control operation comprises the inhibition of the gear shifting operation.
2. The method of claim 1, wherein prior to said determining a driver operating intent from accelerator opening information and engine speed information in said vehicle parameter information, the method further comprises:
setting engine rotating speed limit values corresponding to different gears to obtain a gear rotating speed relation;
the determining of the operation intention of the driver according to the accelerator opening information and the engine speed information in the vehicle parameter information comprises the following steps:
determining whether the gear-up restraining condition is met or not according to the gear speed relation and the engine speed;
and if so, determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold value, wherein the accelerator opening and the target accelerator opening change rate threshold value in the accelerator opening information are negative numbers, and the operation intention of the driver comprises the steps of inhibiting the gear-up and allowing the gear-up.
3. The method of claim 2, wherein said determining whether a inhibit upshift condition is met based on said gear speed relationship and an engine speed comprises:
determining a corresponding engine speed limit value from the gear speed relation according to the target gear information;
determining whether the current engine speed does not exceed the engine speed limit value according to the engine speed information;
if the condition of restraining the upshifting is determined to be met according to the gear speed relation and the engine speed, determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold value, wherein the method comprises the following steps:
and if the current engine rotating speed is determined not to exceed the engine rotating speed limit value according to the engine rotating speed information, determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold value.
4. The method of claim 3, wherein prior to said determining a driver intent to operate based on said throttle opening information and a target throttle opening change rate threshold, said method further comprises:
setting throttle opening change rate thresholds corresponding to different gears to obtain a throttle opening change rate table;
determining the operation intention of the driver according to the accelerator opening information and the target accelerator opening change rate threshold, wherein the method comprises the following steps:
determining a corresponding throttle opening change rate from the throttle opening change rate table according to the target gear, and using the corresponding throttle opening change rate as the target throttle opening change rate threshold;
calculating the accelerator opening change rate according to the accelerator opening difference value determined in the accelerator opening information and an accelerator change time period, wherein the accelerator change time period is a time period when the accelerator pedal changes in external pressure to cause the pedal opening to change;
when the throttle opening change rate is smaller than or equal to the target throttle opening change rate threshold, determining that the driver operation intention is to inhibit an upshift operation;
when the throttle opening change rate is greater than the target throttle opening change rate threshold, determining that the driver operation intention is to allow an upshift operation.
5. The method of claim 4, wherein prior to said performing a corresponding shift control operation in accordance with said driver operating intent and said target gear, said method further comprises:
detecting whether a braking operation is received;
when the braking operation is detected, it is determined that the driver's operation intention is to suppress an upshift operation.
6. The method according to any one of claims 1-5, characterized in that said performing a corresponding shift control operation in accordance with said driver operating intent and said target gear comprises:
when it is determined that the driver's operation intention is to suppress an upshift, suppressing an upshift operation of the transmission;
when it is determined that the driver's operation intention is to allow an upshift, an upshift operation of the transmission is allowed.
7. The method of claim 6, wherein prior to inhibiting upshift operation of a transmission when it is determined that the driver operating intent is to inhibit upshift, the method further comprises:
setting the inhibition upshift duration corresponding to different gears to obtain an inhibition duration relation table;
determining corresponding inhibition upshift duration from the inhibition duration relation table according to the target gear;
and when it is determined that the driver's operation intention is to suppress an upshift, then suppressing an upshift operation of the transmission, includes:
and when it is determined that the driver's operation intention is to suppress the upshift, suppressing the upshift operation of the transmission for a period corresponding to the upshift suppressing period.
8. A shift control device for an automatic transmission, comprising:
the system comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring vehicle parameter information, and the vehicle parameter information comprises accelerator opening information, vehicle speed information and engine rotating speed information;
the first determining unit is used for determining a target gear through a preset gear shifting map according to accelerator opening information and vehicle speed information in the vehicle parameter information, wherein the preset gear shifting map comprises the corresponding relation among the vehicle speed, the accelerator opening and the gear;
a second determination unit, configured to determine a driver operation intention according to accelerator opening information and engine speed information in the vehicle parameter information, where the driver operation intention is used to determine whether an upshift operation of the automatic transmission needs to be suppressed;
and the execution unit is used for executing corresponding gear shifting control operation according to the driver operation intention and the target gear, and the gear shifting control operation comprises the inhibition of the gear-shifting operation.
9. A gear change control system based on an automatic gearbox, characterized by comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method according to any of claims 1-7 when executing the program.
10. 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.
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| CN202011120809.XA CN112413108A (en) | 2020-10-19 | 2020-10-19 | Gear shifting control method, device and system based on automatic gearbox and storage medium |
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| CN202011120809.XA CN112413108A (en) | 2020-10-19 | 2020-10-19 | Gear shifting control method, device and system based on automatic gearbox and storage medium |
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| CN113513583A (en) * | 2021-05-28 | 2021-10-19 | 蜂巢传动科技河北有限公司 | Control method and device for delaying gear-up after vehicle fuel door is released and automatic transmission |
| CN113700850A (en) * | 2021-09-29 | 2021-11-26 | 宜宾凯翼汽车有限公司 | Gear control method of vehicle automatic transmission control unit |
| CN113859259A (en) * | 2021-08-27 | 2021-12-31 | 重庆青山工业有限责任公司 | Target gear checking method |
| CN114704631A (en) * | 2022-05-09 | 2022-07-05 | 潍柴动力股份有限公司 | Gear shifting control method and device, electronic equipment and storage medium |
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| CN114922967A (en) * | 2022-04-22 | 2022-08-19 | 一汽奔腾轿车有限公司 | Control method for improving vehicle acceleration response through delayed upshift |
| CN114941707A (en) * | 2022-05-31 | 2022-08-26 | 三一专用汽车有限责任公司 | Gear shifting prompting method and device and engineering machinery |
| CN115355312A (en) * | 2022-08-04 | 2022-11-18 | 潍柴动力股份有限公司 | Gearbox gear shifting control method and device, storage medium and terminal |
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