CN114811031A - Control method for improving vehicle acceleration power response - Google Patents
Control method for improving vehicle acceleration power response Download PDFInfo
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- CN114811031A CN114811031A CN202210442788.6A CN202210442788A CN114811031A CN 114811031 A CN114811031 A CN 114811031A CN 202210442788 A CN202210442788 A CN 202210442788A CN 114811031 A CN114811031 A CN 114811031A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000001133 acceleration Effects 0.000 title claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000011084 recovery Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000011217 control strategy Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- F16H61/0213—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 characterised by the method for generating shift signals
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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
- F16H59/48—Inputs being a function of acceleration
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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
- F16H61/10—Controlling shift hysteresis
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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
- F16H2061/0012—Transmission control for optimising power output of driveline
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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
- F16H2061/0015—Transmission control for optimising fuel consumptions
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention provides a control method for improving the acceleration power response of a vehicle, which judges whether the condition of emergency oil receiving of the driver is met or not by identifying the speed and the opening degree of an accelerator pedal of the driver, if the condition of emergency oil receiving is met, the vehicle is kept at a set gear by delaying gear-up, changing a gear-shifting strategy and the like, the problems of frequent gear-shifting, slow power response and the like when the driver changes the driving intention to accelerate again after sliding in emergency oil receiving are solved, and the power response and the driving pleasure of the reacceleration can be effectively improved. The accelerator pedal is designed according to NVH and economy, power response of stepping on the accelerator in a sliding state is improved, power response and re-acceleration capacity of acceleration can be effectively improved due to untightening, frequent gear shifting is avoided, and the accelerator pedal has a beneficial effect on economy of a vehicle. The automatic gear shifting control device is suitable for automatic transmissions which can perform automatic gear shifting control, such as hydraulic automatic transmissions, electric control mechanical automatic transmissions, double-clutch automatic transmissions and the like.
Description
Technical Field
The invention belongs to the technical field of automatic transmission control, relates to a control method for improving vehicle acceleration power response, and particularly relates to a control method for improving the dynamic property of a vehicle under a reacceleration working condition.
Background
With the increasing demand of people for the driving feeling of the vehicle, various performances of the whole vehicle are concerned by drivers, wherein the dynamic property and the acceleration feeling are the most concerned performances of the drivers. Under the condition that the configuration of a vehicle powertrain is fixed, the power output of stepping on the accelerator can be controlled only from the aspects of an engine or a transmission, if the power output of the accelerator is considered from the aspect of the torque output of an accelerator pedal of the engine, the driving style of the vehicle can be changed integrally, and the operation of changing the driving intention of stepping on the accelerator under the coasting working condition cannot be obviously improved. If the gear-shifting speed is increased and the lower gear is used after the accelerator is stepped on, the prior art can not well solve the problems of gear shifting required for acceleration and frequent gear shifting during sliding and accelerating.
CN 111692330 a discloses a method for correcting a shift schedule of an automatic transmission based on driving intention, which needs to collect an engine speed and an accelerator opening signal, then performs differential processing on the accelerator opening signal to obtain an accelerator opening change rate signal, determines a driving intention of a driver for deceleration, maintenance or acceleration according to the current accelerator opening and the accelerator opening change rate signal, determines different shift correction coefficients according to different driving intentions, determines whether the current speed is in a corresponding engine interval speed range when the shift schedule is corrected according to the collected engine speed, corrects the shift schedule according to the determined shift schedule correction coefficient if the current speed is in the engine interval speed range, and maintains the original normal shift schedule if the current speed is not in the engine interval speed range.
CN 113147393A discloses a method and a device for identifying mistaken stepping of an automobile accelerator pedal, which relate to the technical field of automobile safety, and the method comprises the following steps: after the whole vehicle is powered on, acquiring biological identification information of a driver, and giving the biological identification information to judge whether the driver has driving authority; when the driver has the driving right, acquiring at least one physiological parameter and accelerator pedal data of the driver; acquiring a preset pedal data threshold and a deviation rate threshold of a physiological parameter; and if the accelerator pedal data is larger than the pedal data threshold value and the deviation rate of any one physiological parameter of the driver is larger than the deviation rate threshold value of the physiological parameter, judging that the accelerator pedal is stepped on by mistake, cutting off power output and executing braking deceleration.
In the currently disclosed technology, protection is mainly performed on the aspect of improving gear shifting smoothness when the intention of the driver is changed from the aspect of predicting the intention of the driver or aiming at changing the intention of the driver in the gear shifting process. In the aspect of promoting the sharp acceleration operating mode dynamic property, optimize in the aspect of accelerating down-shift speed, increase accelerator opening and torque compensation mostly, but do not consider to accelerate and receive the oil back vehicle and can slide and upshift, and the fast driver steps on the gas again this moment and adds, and the vehicle will accelerate again after will stepping on with higher fender position or reducing the fender position, will lead to easily appearing shifting frequently the problem and make the obvious reduction of acceleration dynamic property like this.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a control method for improving the acceleration power response of a vehicle, which judges whether the condition of emergency oil collection of the driver is met or not by identifying the speed and the opening degree of an accelerator pedal of the driver, and if the condition of emergency oil collection is met, the vehicle is kept in a set gear by delaying gear-up, changing gear-shifting strategies and the like, so that the problems of frequent gear-shifting, slow power response and the like when the driver changes the driving intention to accelerate again after sliding in emergency oil collection can be solved, and the power response and the driving pleasure of the reacceleration can be effectively improved.
The purpose of the invention is realized by the following technical scheme:
a control method for improving vehicle acceleration power response, comprising the steps of:
s1, collecting relevant signals of accelerator opening, vehicle speed, engine rotating speed, gear and the like;
s2, judging whether the emergency oil receiving state entering condition is met or not according to the set condition, and carrying out gear shifting control according to a set gear shifting strategy;
and S3, judging whether the exit condition of the emergency oil receiving control is met or not according to the set condition, and if the exit condition is met, performing gear shifting control according to the original gear shifting strategy.
Specifically, in step S1, the signal obtaining method is as follows:
(1) reading an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal through a diagnostic port by using a diagnostic instrument;
(2) reading an accelerator pedal opening degree signal, an accelerator opening degree change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal through a vehicle control unit;
(3) the method comprises the steps that signals of the opening degree of an accelerator pedal and the change rate of the opening degree of the accelerator pedal are obtained through a sensor, gear information is obtained through a gear sensor, a vehicle speed signal is obtained through a vehicle speed sensor, and engine rotating speed information is obtained through a rotating speed sensor.
Specifically, the step S2 includes:
s21, judging whether the oil is in an emergency oil receiving state 1 or not according to set judgment conditions, and if so, keeping the current gear; and proceeds to step S22;
s22, judging whether the oil is in an emergency oil receiving state 2 at present according to set judgment conditions;
and S23, if the oil receiving state is in the emergency oil receiving state 2, carrying out gear shifting control according to a set gear shifting strategy.
More specifically, in step S21, it is determined whether the emergency oil receiving state 1 is currently set according to the set determination conditions:
1) the speed of the vehicle is greater than a set value V i The gear is higher than the set gear G i The current oil temperature is higher than a set value T i ；
2) The change rate of the opening reduction of the accelerator is larger than a set value alpha 1 ；
And if the conditions are met, entering an emergency oil receiving state 1, and controlling the transmission in a mode of keeping the current gear unchanged.
More specifically, in step S22, it is determined whether the emergency oil receiving state 2 is currently set according to the set determination conditions:
1) currently in an emergency oil receiving state 1;
2) at a set time t 1 The opening of the accelerator is smaller than a set value mu after oil is collected 1 ；
If the conditions are met, the emergency oil receiving state 2 is entered.
More specifically, in step S23, if it is determined whether the emergency oil receiving state 2 is currently set, the following control is performed:
after the control of the emergency oil receiving state 2 is carried out, a new gear shifting strategy which is set independently is used for controlling, different gear shifting rotating speeds are set according to the requirement of the dynamic property by the new gear shifting strategy, and the higher the gear shifting rotating speed is, the better the dynamic property is.
Instead, the new shift strategy sets different shift speeds based on NVH performance, with higher shift speeds resulting in poorer NVH performance.
Instead, the new gear shifting strategy sets the gear shifting rotating speed according to the oil cut-off rotating speeds of different gears of the engine, and the oil cut-off state is ensured to be entered as early as possible when the engine slides after receiving oil.
Alternatively, the new shift strategy sets different shift speeds according to different driving requirements for different driving modes.
Specifically, in step S3, it is determined whether or not the exit condition for the emergency oil recovery control is satisfied based on the set conditions, and the exit condition is as follows:
1) the duration of the emergency oil receiving state 2 exceeds the set limit value t 2 ；
2) The opening degree of the accelerator pedal of the driver is more than the set value mu 2 ；
When any one of the above conditions is met, the emergency oil receiving state 2 is exited.
The invention has the following beneficial effects:
according to the control method for improving the vehicle acceleration power response, the entry judgment conditions of an accelerator opening condition 1 and an accelerator opening condition 2 are judged according to the accelerator opening, the accelerator opening change rate, the vehicle speed and the gear; and judging a gear shifting control strategy after entering an emergency oil receiving state 1 and an emergency oil receiving state 2. The accelerator control device can enable the engine to be lifted to a lower gear after oil collection, effectively avoid frequent gear shifting when a driver steps on the accelerator again, and improve the power response of re-acceleration.
According to the control method for improving the vehicle acceleration power response, the establishment basis of the control strategy after the working condition of the emergency oil receiving state 2 is taken into consideration, such as NVH, dynamic property, economy and the like.
The invention provides a control method for improving vehicle acceleration power response, which considers NVH and economy and improves the accelerator stepping power response in a sliding state.
The control method for improving the vehicle acceleration power response is suitable for automatic transmissions such as a hydraulic Automatic Transmission (AT), an electric control mechanical automatic transmission (AMT) and a double-clutch automatic transmission (DCT) which can perform automatic gear shifting control.
Drawings
FIG. 1 is a schematic overall flowchart of a control method for improving vehicle acceleration power response according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a control method for improving an acceleration power response of a vehicle according to an embodiment of the present invention;
fig. 3 is a control timing chart and an effect chart of a control method for improving vehicle acceleration power response according to an embodiment of the invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment as follows:
a control method for improving vehicle acceleration power response, comprising the steps of:
s1, collecting throttle opening, vehicle speed, engine rotating speed and gear signals;
s2, judging whether the emergency oil receiving state entering condition is met or not according to the set condition, and carrying out gear shifting control according to a set gear shifting strategy;
and S3, judging whether the exit condition of the emergency oil receiving control is met or not according to the set condition, and if the exit condition is met, performing gear shifting control according to the original gear shifting strategy.
Specifically, in step S1, the signal obtaining method is as follows:
(1) reading an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal through a diagnostic port by using a diagnostic instrument;
(2) reading an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal through a vehicle control unit;
(3) the method comprises the steps that signals of the opening degree of an accelerator pedal and the change rate of the opening degree of the accelerator pedal are obtained through a sensor, gear information is obtained through a gear sensor, a vehicle speed signal is obtained through a vehicle speed sensor, and engine rotating speed information is obtained through a rotating speed sensor.
Specifically, the step S2 includes:
s21, judging whether the oil is in an emergency oil receiving state 1 or not according to set judgment conditions, and if so, keeping the current gear; and proceeds to step S22;
s22, judging whether the oil is in an emergency oil receiving state 2 at present according to set judgment conditions;
and S23, if the oil receiving state is in the emergency oil receiving state 2, carrying out gear shifting control according to a set gear shifting strategy.
More specifically, in step S21, it is determined whether the emergency oil receiving state 1 is currently set according to the set determination conditions:
1) the vehicle speed is greater than a set value V i The gear is higher than the set gear G i The current oil temperature is higher than a set value T i ；
2) The change rate of the opening reduction of the accelerator is larger than a set value alpha 1 ；
And if the conditions are met, entering an emergency oil receiving state 1, and controlling the transmission in a mode of keeping the current gear unchanged.
More specifically, in step S22, it is determined whether the emergency oil receiving state 2 is currently set according to the set determination conditions:
1) currently in an emergency oil receiving state 1;
2) at a set time t 1 The opening of the accelerator is smaller than a set value mu after oil is collected 1 ；
If the conditions are met, the emergency oil receiving state 2 is entered.
More specifically, in step S23, if it is determined whether the emergency oil receiving state 2 is currently set, the following control is performed:
after the control of the emergency oil receiving state 2 is carried out, a new gear shifting strategy which is set independently is used for controlling, different gear shifting rotating speeds are set according to the requirement of the dynamic property by the new gear shifting strategy, and the higher the gear shifting rotating speed is, the better the dynamic property is.
Instead, the new shift strategy sets different shift speeds based on NVH performance, with higher shift speeds resulting in poorer NVH performance.
Instead, the new gear shifting strategy sets the gear shifting rotating speed according to the oil cut-off rotating speeds of different gears of the engine, and the oil cut-off state is ensured to be entered as early as possible when the engine slides after receiving oil.
Alternatively, the new shift strategy sets different shift speeds according to different driving requirements for different driving modes.
Specifically, in step S3, it is determined whether or not the exit condition for the emergency oil recovery control is satisfied based on the set conditions, and the exit condition is as follows:
1) the duration of the emergency oil receiving state 2 exceeds the set limit value t 2 ；
2) The opening degree of the accelerator pedal of the driver is more than the set value mu 2 ；
When any one of the above conditions is met, the emergency oil receiving state 2 is exited.
Examples
A control method for improving acceleration response of a vehicle under a condition of reacceleration after sudden oil collection is disclosed, as shown in figure 1, and comprises the following steps:
monitoring related signals of accelerator opening and change rate, vehicle speed, gear and the like in real time;
judging whether the current oil receiving state is an emergency oil receiving state 1 or not according to set judgment conditions, and if so, keeping the current gear;
judging whether the oil is in an emergency oil receiving state 2 at present according to the set judgment condition;
if the oil is in the emergency oil receiving state 2, performing gear shifting control according to a set gear shifting strategy;
judging whether the emergency oil receiving control quitting condition is met or not according to the set judgment condition;
and if the condition of exiting the emergency oil receiving control is met, carrying out gear shifting control according to a normal gear shifting strategy.
In the step (i), the information obtaining manner includes, but is not limited to, the following:
1.1) reading an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal, an engine rotating speed signal and the like through a diagnosis port by using a diagnostic instrument;
1.2) reading an accelerator pedal opening degree signal, an accelerator opening degree change rate signal, a gear signal, a vehicle speed signal, an engine rotating speed signal and the like through a control unit of the whole vehicle;
1.3) the signals of the opening degree of the accelerator pedal and the change rate of the opening degree of the accelerator pedal are obtained by an accelerator opening degree sensor, gear information can be obtained by a gear sensor, a vehicle speed signal is obtained by a vehicle speed sensor, and the information of the rotating speed of the engine is obtained by a rotating speed sensor.
In the second step, whether the oil is in the emergency oil receiving state 1 currently is judged according to set judgment conditions, wherein the specific conditions are as follows:
2.1) basic condition that the vehicle speed must be greater than a set value, e.g. V i The gear must be higher than a certain gear G i The current oil temperature must be higher than a certain set value T i ；
2.2) the rate of change of the reduction of the throttle opening is greater than a certain set value alpha 1 ；
2.3) a limit value set above, e.g. V i 、G i 、T i 、α 1 Generally determined according to the drivability of the whole vehicle;
and if the condition 2.1-2.2 is met, entering an emergency oil receiving state 1, and controlling the transmission in a mode of keeping the current gear unchanged.
In the third step, whether the oil is in the emergency oil receiving state 2 currently is judged according to the set judgment condition, and the specific conditions are as follows:
3.1) the current state is in an emergency oil receiving state 1;
3.2) at a set time t 1 The opening of the throttle is less than a certain set value mu after oil is collected 1 ；
3.3) a limit value set above, e.g. t 1 、μ 1 Generally determined according to the drivability of the whole vehicle;
if the conditions are met, the emergency oil receiving state 2 is entered.
In the fourth step, if it is determined whether the oil is in the emergency oil receiving state 2, the following control is performed:
4.1) after entering the emergency oil receiving state 2 control, using a separately set gear shifting strategy as shown in the table 1;
table 1 upshift speed units for the new shift strategy: r/min
| Shift pattern | 1 gear up and 2 gear | 2-gear up and 3-gear | 3-gear up and 4-gear | 4-gear up and 5-gear | 5-gear up and 6-gear |
| Eco | 2600 | 2600 | 2600 | 2600 | 2600 |
| Comfort | 2900 | 2900 | 2900 | 2900 | 2900 |
| Sport | 4500 | 4500 | 4500 | 4500 | 4500 |
| … | … | … | … | … | … |
| … | … | … | … | … | … |
| … | … | … | … | … | … |
4.2) the new gear shifting strategy gear shifting points can be set differently according to the requirement of dynamic property, the higher the gear shifting rotating speed is, the better the dynamic property is, and the dynamic property standard can be determined by subjective driving or objective evaluation;
4.3) the new gear shifting strategy gear shifting points can be set differently according to the performance of the NVH, the higher the gear shifting rotating speed is, the worse the NVH performance is, and the NVH performance standard can be determined by subjective driving or objective evaluation;
4.4) the new gear shifting strategy gear shifting points can be determined according to the oil cut-off rotating speeds of different gears of the engine, so that the oil cut-off state can be ensured to be entered as early as possible when the oil is collected and slides, and the beneficial effect on improving the economy of a vehicle is achieved;
4.5) the new gear shifting strategy gear shifting points can be set differently according to different driving requirements in different driving modes;
4.6) use new gear shifting tactics, can make the derailleur rise to lower gear when the operating mode of receiving oil suddenly, the power response is better when the driver steps on the throttle again, and dynamic nature is stronger.
In the fifth step, whether the determination condition for quitting the oil receiving state is met or not is judged according to the set determination condition, and the specific conditions are as follows:
5.1) the duration of the emergency oil recovery state 2 exceeds the set limit t 2 ；
5.2) the opening degree of the accelerator treaded by the driver is more than a set value mu 2 ；
5.3) a limit value set above, e.g. t 2 、μ 2 Generally determined according to the drivability of the whole vehicle;
when any one of the above conditions is met, the emergency oil receiving state 2 is exited.
And sixthly, if the emergency oil receiving state quit condition is met, controlling according to the original gear shift control strategy as shown in the table 2.
Table 2 upshift speed units of the original shift strategy: r/min
| Shift pattern | 1 gear up and 2 gear | 2-gear up and 3-gear | 3-gear up and 4-gear | 4-gear up and 5-gear | 5-gear up and 6-gear |
| Eco | 1700 | 1700 | 1700 | 1700 | 1700 |
| Comfort | 1900 | 1900 | 1900 | 1900 | 1900 |
| Sport | 2500 | 2500 | 2500 | 2500 | 2500 |
| … | … | … | … | … | … |
| … | … | … | … | … | … |
Claims (10)
1. A control method for improving a vehicle acceleration power response, characterized by comprising the steps of:
s1, collecting throttle opening, vehicle speed, engine rotating speed and gear signals;
s2, judging whether the emergency oil receiving state entering condition is met or not according to the set condition, and carrying out gear shifting control according to a set gear shifting strategy;
and S3, judging whether the exit condition of the emergency oil receiving control is met or not according to the set condition, and if the exit condition is met, performing gear shifting control according to the original gear shifting strategy.
2. A control method for improving acceleration power response of a vehicle according to claim 1, characterized in that in said step S1, the signal is obtained by any one of the following three methods:
1) reading an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal through a diagnostic port by using a diagnostic instrument;
2) reading an accelerator pedal opening degree signal, an accelerator opening degree change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal through a vehicle control unit;
3) the method comprises the steps that signals of the opening degree of an accelerator pedal and the change rate of the opening degree of the accelerator pedal are obtained through a sensor, gear information is obtained through a gear sensor, a vehicle speed signal is obtained through a vehicle speed sensor, and engine rotating speed information is obtained through a rotating speed sensor.
3. A control method of improving a vehicle acceleration power response according to claim 1, characterized in that said step S2 includes:
s21, judging whether the oil is in an emergency oil receiving state 1 or not according to set judgment conditions, and if so, keeping the current gear; and proceeds to step S22;
s22, judging whether the oil is in an emergency oil receiving state 2 at present according to set judgment conditions;
and S23, if the oil receiving state is in the emergency oil receiving state 2, carrying out gear shifting control according to a set gear shifting strategy.
4. A control method for improving the acceleration power response of a vehicle according to claim 3, wherein in step S21, it is determined whether the vehicle is currently in the emergency oil receiving state 1 according to the set determination conditions, which are as follows:
1) the speed of the vehicle is greater than a set value V i The gear is higher than the set gear G i The current oil temperature is higher than a set value T i ；
2) The change rate of the opening reduction of the accelerator is larger than a set value alpha 1 ；
And if the conditions are met, entering an emergency oil receiving state 1, and controlling the transmission in a mode of keeping the current gear unchanged.
5. A control method for improving the acceleration power response of a vehicle according to claim 3, wherein in step S22, it is determined whether the vehicle is currently in the emergency oil receiving state 2 according to the set determination conditions, which are as follows:
1) currently in an emergency oil receiving state 1;
2) at a set time t 1 The opening of the accelerator is smaller than a set value mu after oil is collected 1 ；
If the conditions are met, the emergency oil receiving state 2 is entered.
6. A control method for improving acceleration power response of a vehicle according to claim 3, wherein in step S23, if it is determined that the vehicle is currently in the emergency oil receiving state 2, the following control is performed:
after the control of the emergency oil receiving state 2 is carried out, a new gear shifting strategy which is set independently is used for controlling, different gear shifting rotating speeds are set according to the requirement of the dynamic property by the new gear shifting strategy, and the higher the gear shifting rotating speed is, the better the dynamic property is.
7. A control method for improving acceleration power response of a vehicle according to claim 3, wherein in step S23, if it is determined that the vehicle is currently in the emergency oil receiving state 2, the following control is performed:
after the control of the emergency oil receiving state 2 is carried out, a new gear shifting strategy which is set independently is used for controlling, different gear shifting rotating speeds are set according to the performance expression of NVH through the new gear shifting strategy, and the higher the gear shifting rotating speed is, the worse the NVH performance is.
8. A control method for improving acceleration power response of a vehicle according to claim 3, wherein in step S23, if it is determined that the vehicle is currently in the emergency oil receiving state 2, the following control is performed:
after the control of the emergency oil receiving state 2 is carried out, a new gear shifting strategy which is set independently is used for controlling, the new gear shifting strategy sets the gear shifting rotating speed according to the oil cut-off rotating speeds of different gears of the engine, and the oil receiving sliding is ensured to enter the oil cut-off state as early as possible.
9. A control method for improving acceleration power response of a vehicle according to claim 3, wherein in step S23, if it is determined that the vehicle is currently in the emergency oil receiving state 2, the following control is performed:
and after the control of the emergency oil receiving state 2 is carried out, a new gear shifting strategy which is set independently is used for controlling, and different gear shifting rotating speeds are set according to different driving requirements of different driving modes by the new gear shifting strategy.
10. A control method for improving the acceleration power response of a vehicle according to claim 1, wherein in step S3, it is determined whether an exit condition for the emergency oil recovery control is satisfied according to a set condition, the exit condition being as follows:
1) the duration of the emergency oil receiving state 2 exceeds the set limit value t 2 ；
2) The opening degree of the accelerator pedal of the driver is more than the set value mu 2 ；
When any one of the above conditions is met, the emergency oil receiving state 2 is exited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210442788.6A CN114811031B (en) | 2022-04-25 | 2022-04-25 | Control method for improving acceleration power response of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210442788.6A CN114811031B (en) | 2022-04-25 | 2022-04-25 | Control method for improving acceleration power response of vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114811031A true CN114811031A (en) | 2022-07-29 |
| CN114811031B CN114811031B (en) | 2024-06-04 |
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| CN114370499A (en) * | 2022-01-28 | 2022-04-19 | 奇瑞商用车（安徽）有限公司 | Automatic gearbox vehicle type downshift control method |
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| CN114370499A (en) * | 2022-01-28 | 2022-04-19 | 奇瑞商用车（安徽）有限公司 | Automatic gearbox vehicle type downshift control method |
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