CN114811031B - Control method for improving acceleration power response of vehicle - Google Patents

Control method for improving acceleration power response of vehicle Download PDF

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Publication number
CN114811031B
CN114811031B CN202210442788.6A CN202210442788A CN114811031B CN 114811031 B CN114811031 B CN 114811031B CN 202210442788 A CN202210442788 A CN 202210442788A CN 114811031 B CN114811031 B CN 114811031B
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gear shifting
gear
emergency oil
control
vehicle
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CN114811031A (en
Inventor
张学锋
陈国栋
杨云波
王昊
李岩
吴刚
许健男
刘治文
王小峰
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FAW Group Corp
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FAW Group Corp
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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
    • 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
    • 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
    • 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
    • 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 is characterized in that whether the condition of the emergency oil collection of the driver is met is judged by identifying the speed and the opening of an accelerator pedal of the driver, if the condition of the emergency oil collection is met, the vehicle is kept at a set gear by delaying the gear up, changing a gear shifting strategy 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 re-accelerate after the emergency oil collection slides are solved, and the power response and the driving fun of the re-acceleration can be effectively improved. The invention gives consideration to NVH and economy, improves the power response of stepping on the accelerator again in a sliding state, can not only effectively improve the power response of acceleration and the re-acceleration capability, avoid frequent gear shifting, but also has beneficial effect on the economy of the vehicle. The automatic gear shifting control device is suitable for automatic gear shifting control automatic transmissions such as hydraulic automatic transmissions, electric control mechanical automatic transmissions and double-clutch automatic transmissions.

Description

Control method for improving acceleration power response of vehicle
Technical Field
The invention belongs to the technical field of automatic transmission control, relates to a control method for improving the acceleration power response of a vehicle, and particularly relates to a control method for improving the dynamic property of the vehicle under the re-acceleration working condition.
Background
Along with the increasing demands of people on the driving feeling of vehicles, various performances of the whole vehicle are aspects focused by drivers, wherein dynamic performance and acceleration feeling are the most focused performances of the drivers. Under the condition that the vehicle power assembly configuration is fixed, the power output of stepping on the accelerator can only be controlled from the aspect of an engine or a transmission, if the torque output of the accelerator pedal of the engine is simply considered, the driving style of the vehicle is changed as a whole, and the operation of changing the driving intention of stepping on the accelerator again under the sliding working condition cannot be obviously improved. If the down shift speed is increased after stepping on the accelerator and the lower shift is used, the prior art can not well solve the problems of the acceleration demand gear and the frequent gear shifting during the sliding and accelerating.
CN 111692330A discloses a correction method of a gear shifting rule of an automatic transmission based on driving intention, which needs to collect engine rotation speed and accelerator opening degree signals, then conduct differential processing on the accelerator opening degree signals to obtain accelerator opening degree change rate signals, determine driving intention of a driver to decelerate, maintain or accelerate according to current accelerator opening degree and accelerator opening degree change rate signals, determine different gear shifting correction coefficients according to different driving intentions, determine whether the current rotation speed is in an engine interval rotation speed range corresponding to gear shifting rule correction according to the collected engine rotation speed, correct the gear shifting rule according to the determined gear shifting rule correction coefficient if the current rotation speed is in the engine interval rotation speed range, and keep the original normal gear shifting rule if the weak current rotation speed is not in the engine interval rotation speed range.
CN 113147393A discloses a method and a device for identifying false stepping on 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 electrified, acquiring the biological identification information of the driver, and giving the biological identification information to judge whether the driver has driving permission or not; when the driver has driving rights, at least one physiological parameter of the driver and accelerator pedal data are acquired; acquiring a preset pedal data threshold and a deviation rate threshold of physiological parameters; if the accelerator pedal data is larger than the pedal data threshold value and the deviation rate of any physiological parameter of the driver is larger than the deviation rate threshold value of the physiological parameter, the accelerator pedal is judged to be stepped on by mistake, the power output is cut off, and braking and deceleration are executed.
In the presently disclosed technology, the acceleration condition for changing the intention of the driver is mainly protected from the aspects of estimating the intention of the driver or improving the smoothness of the gear shift when the intention of the driver is changed during the gear shift. In the aspect of improving the dynamic performance of the rapid acceleration working condition, the gear shifting speed is accelerated, the accelerator opening is increased, and the torque compensation is optimized, but the vehicle can slide and upshift after accelerating and oil receiving is not considered, at the moment, a driver steps on the accelerator again, the vehicle accelerates in a higher gear or accelerates after reducing the gear, so that the problem of frequent gear shifting is easily caused, and the accelerating dynamic performance is obviously reduced.
Disclosure of Invention
In order to solve the problems of the prior art, the invention provides a control method for improving the acceleration power response of a vehicle, which is characterized in that whether the condition of emergency oil collection of the driver is met is judged by identifying the speed and the opening of an accelerator pedal of the driver, if the condition of emergency oil collection is met, the vehicle is kept at a set gear by delaying the gear up and changing a gear shifting strategy 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 re-accelerate after the emergency oil collection slides are solved, and the power response and the driving fun of the re-acceleration can be effectively improved.
The invention aims at realizing the following technical scheme:
A control method for enhancing acceleration power response of a vehicle, comprising the steps of:
s1, collecting related signals such as an accelerator opening, a vehicle speed, an engine rotating speed, a gear and the like;
S2, judging whether an emergency oil receiving state entering condition is met or not according to the set condition, and performing gear shifting control according to a set gear shifting strategy;
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 the step S1, the signal obtaining manner 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 diagnosis port by using a diagnostic instrument;
(2) The method comprises the steps that an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal are read through a whole vehicle control unit;
(3) The engine speed sensor is used for acquiring the speed signal of the engine, wherein the speed signal is acquired by the speed sensor, and the engine speed information is acquired by the speed sensor.
Specifically, the step S2 includes:
S21, judging whether the vehicle is in an emergency oil receiving state 1 at present according to a set judging condition, and if so, maintaining 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 the set judging conditions;
s23, if the oil is in the emergency oil receiving state 2, gear shifting control is carried out according to a set gear shifting strategy.
More specifically, in the step S21, it is determined whether the emergency oil receiving state 1 is currently set according to the set determination conditions, where the determination conditions are as follows:
1) The vehicle speed is greater than a set value V i, the gear is higher than a set gear G i, and the current oil temperature is higher than a set value T i;
2) The throttle opening degree reduction change rate is larger than a set value alpha 1;
if the conditions are met at the same time, the emergency oil receiving state 1 is entered, and the control mode of the transmission is that the current gear is kept unchanged.
More specifically, in the step S22, it is determined whether the emergency oil receiving state 2 is currently set according to the set determination conditions, where the determination conditions are as follows:
1) Currently in the emergency oil receiving state 1;
2) In the set time t 1, the throttle opening is smaller than the set value mu 1 after oil is collected;
if the above conditions are satisfied at the same time, the emergency oil recovery state 2 is entered.
More specifically, in the step S23, if it is determined whether the emergency oil recovery state 2 is currently in the emergency oil recovery state, the following control is performed:
After entering the emergency oil receiving state 2 for control, a new gear shifting strategy which is set independently is used for control, different gear shifting rotating speeds are set according to the power performance requirement, and the higher the gear shifting rotating speed is, the better the power performance is.
Alternatively, the new gear shifting strategy sets different gear shifting rotational speeds according to the performance of NVH, and the higher the gear shifting rotational speed, the worse the NVH performance.
Alternatively, the new gear shifting strategy sets the gear shifting rotating speed according to the oil cutting rotating speeds of different gears of the engine, so that the oil cutting state is ensured to be entered as soon as possible when the oil is received and slipped.
Instead, the new shift strategy sets different shift speeds according to different driving demands of different driving modes.
Specifically, in the step S3, according to the set condition, it is determined whether an exit condition of the emergency oil recovery control is satisfied, where the exit condition is as follows:
1) The duration of the emergency oil receiving state 2 exceeds the set limit t 2;
2) The opening degree of the accelerator pedal by the driver is larger than a set value mu 2;
When any of the above conditions is met, the emergency oil recovery state 2 is exited.
The invention has the following beneficial effects:
In the control method for improving the acceleration power response of the vehicle, the entering judgment conditions of the quick-release throttle working condition 1 and the quick-release throttle working condition 2 are judged according to the throttle opening, the throttle opening change rate, the vehicle speed and the gear; and judging a gear shifting control strategy performed after entering the emergency oil collecting state 1 and the emergency oil collecting state 2. The oil collecting device can enable the oil 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.
In the control method for improving the acceleration power response of the vehicle, the control strategy after the condition of the emergency oil recovery state 2 is formulated according to the control strategy, and the aspects of NVH, power performance, economy and the like are considered.
The control method for improving the acceleration power response of the vehicle, provided by the invention, has the advantages that NVH and economy are taken into account, and the power response of stepping on the accelerator again in a sliding state is improved.
The control method for improving the acceleration power response of the vehicle is suitable for automatic transmissions capable of performing automatic gear shifting control, such as a hydraulic Automatic Transmission (AT), an electric control mechanical automatic transmission (AMT) and a double clutch automatic transmission (DCT).
Drawings
FIG. 1 is a schematic overall flow chart of a control method for improving acceleration power response of a vehicle according to an embodiment of the invention;
FIG. 2 is a flowchart of a control method for improving acceleration power response of a vehicle according to an embodiment of the present invention;
Fig. 3 is a control timing and effect diagram of a control method for improving acceleration power response of a vehicle according to an embodiment of the invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples:
A control method for enhancing acceleration power response of a vehicle, comprising the steps of:
s1, collecting signals of an accelerator opening, a vehicle speed, an engine rotating speed and a gear;
S2, judging whether an emergency oil receiving state entering condition is met or not according to the set condition, and performing gear shifting control according to a set gear shifting strategy;
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 the step S1, the signal obtaining manner 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 diagnosis port by using a diagnostic instrument;
(2) The method comprises the steps that an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal are read through a whole vehicle control unit;
(3) The engine speed sensor is used for acquiring the speed signal of the engine, wherein the speed signal is acquired by the speed sensor, and the engine speed information is acquired by the speed sensor.
Specifically, the step S2 includes:
S21, judging whether the vehicle is in an emergency oil receiving state 1 at present according to a set judging condition, and if so, maintaining 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 the set judging conditions;
s23, if the oil is in the emergency oil receiving state 2, gear shifting control is carried out according to a set gear shifting strategy.
More specifically, in the step S21, it is determined whether the emergency oil receiving state 1 is currently set according to the set determination conditions, where the determination conditions are as follows:
1) The vehicle speed is greater than a set value V i, the gear is higher than a set gear G i, and the current oil temperature is higher than a set value T i;
2) The throttle opening degree reduction change rate is larger than a set value alpha 1;
if the conditions are met at the same time, the emergency oil receiving state 1 is entered, and the control mode of the transmission is that the current gear is kept unchanged.
More specifically, in the step S22, it is determined whether the emergency oil receiving state 2 is currently set according to the set determination conditions, where the determination conditions are as follows:
1) Currently in the emergency oil receiving state 1;
2) In the set time t 1, the throttle opening is smaller than the set value mu 1 after oil is collected;
if the above conditions are satisfied at the same time, the emergency oil recovery state 2 is entered.
More specifically, in the step S23, if it is determined whether the emergency oil recovery state 2 is currently in the emergency oil recovery state, the following control is performed:
After entering the emergency oil receiving state 2 for control, a new gear shifting strategy which is set independently is used for control, different gear shifting rotating speeds are set according to the power performance requirement, and the higher the gear shifting rotating speed is, the better the power performance is.
Alternatively, the new gear shifting strategy sets different gear shifting rotational speeds according to the performance of NVH, and the higher the gear shifting rotational speed, the worse the NVH performance.
Alternatively, the new gear shifting strategy sets the gear shifting rotating speed according to the oil cutting rotating speeds of different gears of the engine, so that the oil cutting state is ensured to be entered as soon as possible when the oil is received and slipped.
Instead, the new shift strategy sets different shift speeds according to different driving demands of different driving modes.
Specifically, in the step S3, according to the set condition, it is determined whether an exit condition of the emergency oil recovery control is satisfied, where the exit condition is as follows:
1) The duration of the emergency oil receiving state 2 exceeds the set limit t 2;
2) The opening degree of the accelerator pedal by the driver is larger than a set value mu 2;
When any of the above conditions is met, the emergency oil recovery state 2 is exited.
Examples
A control method for improving acceleration response of a vehicle under a condition of accelerating after oil is suddenly collected is shown in fig. 1, and comprises the following steps:
① Monitoring signals such as throttle opening and change rate, vehicle speed, gear and the like in real time;
② Judging whether the current gear is in an emergency oil receiving state 1 or not according to the set judging conditions, and if the current gear is met, keeping the current gear;
③ Judging whether the oil is in an emergency oil receiving state 2 at present according to the set judging conditions;
④ If the emergency oil receiving state 2 is in, performing gear shifting control according to a set gear shifting strategy;
⑤ Judging whether the emergency oil recovery control exit condition is met according to the set judgment condition;
⑥ And if the emergency oil recovery control condition is met, performing gear shifting control according to a normal gear shifting strategy.
In step ①, the information obtaining manner includes, but is not limited to, the following:
1.1 Using a diagnostic instrument to read an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal, an engine speed signal and the like through a diagnostic port;
1.2 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 control unit of the whole vehicle;
1.3 The accelerator pedal opening and the change rate of the accelerator pedal opening are obtained by an accelerator opening sensor, the gear information can be obtained by a gear sensor, the vehicle speed signal is obtained by a vehicle speed sensor, and the engine rotating speed information is obtained by a rotating speed sensor.
In step ②, according to the set judgment condition, whether the emergency oil receiving state 1 is currently set is judged, and the specific condition is as follows:
2.1 The basic condition is that the vehicle speed must be greater than a certain set value such as V i, the gear must be higher than a certain gear G i, and the current oil temperature must be higher than a certain set value T i;
2.2 The throttle opening degree reduction change rate is larger than a certain set value alpha 1;
2.3 The above set limit value such as V i、Gi、Ti、α1 is generally determined according to the drivability of the whole vehicle;
If the conditions 2.1-2.2 are met, the emergency oil receiving state 1 is entered, and the transmission is controlled in a mode of keeping the current gear unchanged.
In step ③, according to the set judgment condition, whether the emergency oil receiving state 2 is currently determined, the specific condition is as follows:
3.1 Currently in the emergency oil recovery state 1;
3.2 In the set time t 1, the throttle opening is smaller than a certain set value mu 1 after oil is received;
3.3 The above set limit value is generally determined according to the drivability of the whole vehicle as t 1、μ1;
if the above conditions are satisfied at the same time, the emergency oil recovery state 2 is entered.
In the step ④, if it is determined whether the emergency oil receiving state 2 is currently in the emergency oil receiving state, the following control is performed:
4.1 After entering the emergency oil recovery state 2 control, using a separately set shift strategy as per table 1;
table 1 upshift speed units for new shift strategy: r/min
Gear shifting mode 1 Gear up 2 gear 2 Gear up 3 gear 3 Gear up 4 gear 4 Gear up 5 gear 5 Gear up 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 point can be set differently according to the power performance requirement, the higher the gear shifting rotating speed is, the better the power performance is, and the power performance standard can be determined by subjective driving or objective evaluation;
4.3 The new gear shifting strategy gear shifting point can be set differently according to the performance of NVH, the higher the gear shifting rotating speed is, the poorer 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 point can be determined according to the oil cutting rotational speeds of different gears of the engine, so that the oil cutting state can be ensured to be entered as soon as possible when the oil is received and slipped, and the novel gear shifting strategy gear shifting point has a beneficial effect on improving the economical efficiency of the vehicle;
4.5 The new gear shifting strategy gear shifting point is used, and different driving modes can be set differently according to different driving requirements;
4.6 The novel gear shifting strategy is used, the transmission can be lifted to a lower gear under the condition of sudden oil collection, and the power response is better and the power performance is stronger when the driver steps on the accelerator again.
In step ⑤, according to the set judgment conditions, it is judged whether the urgent oil recovery state exit judgment conditions are satisfied, and the specific conditions are as follows:
5.1 The duration of the emergency oil receiving state 2 exceeds the set limit t 2;
5.2 The opening degree of the accelerator pedal of the driver is larger than a set value mu 2;
5.3 The above set limit value is generally determined according to the drivability of the whole vehicle as t 2、μ2;
When any of the above conditions is met, the emergency oil recovery state 2 is exited.
In step ⑥, if the emergency oil receiving state exit condition is satisfied, the control is performed according to the original gear shift control strategy as shown in table 2.
Table 2 upshift speed units for original shift strategy: r/min
Gear shifting mode 1 Gear up 2 gear 2 Gear up 3 gear 3 Gear up 4 gear 4 Gear up 5 gear 5 Gear up 6 gear
Eco 1700 1700 1700 1700 1700
Comfort 1900 1900 1900 1900 1900
Sport 2500 2500 2500 2500 2500
… … … … … …
… … … … … …

Claims (4)

1. A control method for enhancing acceleration power response of a vehicle, comprising the steps of:
S1, collecting signals of an accelerator opening, a vehicle speed, an engine rotating speed and a gear; the signal acquisition mode adopts any one of the following three modes:
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 diagnosis port by using a diagnostic instrument;
2) The method comprises the steps that an accelerator pedal opening signal, an accelerator opening change rate signal, a gear signal, a vehicle speed signal and an engine rotating speed signal are read through a whole vehicle control unit;
3) The method comprises the steps that the accelerator pedal opening and the change rate of the accelerator pedal opening 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 rotation speed information is obtained through a rotation speed sensor;
S2, judging whether an emergency oil receiving state entering condition is met or not according to the set condition, and performing gear shifting control according to a set gear shifting strategy; the step S2 includes:
S21, judging whether the vehicle is in an emergency oil receiving state 1 at present according to a set judging condition, and if so, maintaining the current gear; and proceeds to step S22; the judgment conditions are as follows:
1) The vehicle speed is greater than a set value V i, the gear is higher than a set gear G i, and the current oil temperature is higher than a set value T i;
2) The throttle opening degree reduction change rate is larger than a set value alpha 1;
If the conditions are met at the same time, entering an emergency oil receiving state 1, wherein the control mode of the transmission is to keep the current gear unchanged;
S22, judging whether the oil is in an emergency oil receiving state 2 at present according to the set judging conditions; the judgment conditions are as follows:
1) Currently in the emergency oil receiving state 1;
2) In the set time t 1, the throttle opening is smaller than the set value mu 1 after oil is collected;
if the conditions are met at the same time, entering an emergency oil receiving state 2;
S23, if the oil is in the emergency oil receiving state 2, performing gear shifting control according to a set gear shifting strategy;
in the step S23, if it is determined that the emergency oil receiving state 2 is currently in the emergency oil receiving state, the following control is performed:
after entering the emergency oil receiving state 2 for control, a new gear shifting strategy which is independently set is used for control, and different gear shifting rotating speeds are set according to the power performance requirement, wherein the higher the gear shifting rotating speed is, the better the power performance is;
s3, judging whether an exit condition of the emergency oil receiving control is met according to the set condition, and if so, performing gear shifting control according to an original gear shifting strategy;
in the step S3, whether the exit condition of the emergency oil recovery control is satisfied is determined according to the set condition, and the exit condition is as follows:
1) The duration of the emergency oil receiving state 2 exceeds the set limit t 2;
2) The opening degree of the accelerator pedal by the driver is larger than a set value mu 2;
When any of the above conditions is met, the emergency oil recovery state 2 is exited.
2. The control method for improving acceleration power response of a vehicle according to claim 1, 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 entering the emergency oil receiving state 2 for control, a new gear shifting strategy which is set independently is used for control, different gear shifting rotating speeds are set according to the performance of NVH, and the higher the gear shifting rotating speed is, the worse the NVH performance is.
3. The control method for improving acceleration power response of a vehicle according to claim 1, 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 emergency oil receiving state 2 is controlled, a new gear shifting strategy which is independently set is used for controlling, and the new gear shifting strategy sets the gear shifting rotating speed according to the oil cutting rotating speeds of different gears of the engine, so that the oil receiving state is ensured to be started as soon as possible when the oil receiving is smooth.
4. The control method for improving acceleration power response of a vehicle according to claim 1, 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 entering the emergency oil receiving state 2 for control, a new gear shifting strategy which is independently set is used for control, and the new gear shifting strategy sets different gear shifting rotating speeds according to different driving requirements of different driving modes.
CN202210442788.6A 2022-04-25 2022-04-25 Control method for improving acceleration power response of vehicle Active CN114811031B (en)

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