CN115217948A - Correction method for vehicle gear shifting point - Google Patents
Correction method for vehicle gear shifting point Download PDFInfo
- Publication number
- CN115217948A CN115217948A CN202111315021.9A CN202111315021A CN115217948A CN 115217948 A CN115217948 A CN 115217948A CN 202111315021 A CN202111315021 A CN 202111315021A CN 115217948 A CN115217948 A CN 115217948A
- Authority
- CN
- China
- Prior art keywords
- driving
- driving style
- indication value
- vehicle
- working condition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000012937 correction Methods 0.000 title claims abstract description 49
- 230000001133 acceleration Effects 0.000 claims abstract description 73
- 238000012512 characterization method Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 238000002715 modification method Methods 0.000 description 3
- 238000009448 modified atmosphere packaging Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/182—Selecting between different operative modes, e.g. comfort and performance modes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/082—Selecting or switching between different modes of propelling
-
- 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
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
-
- 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
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
-
- 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
- F16H59/68—Inputs being a function of gearing status
- F16H59/70—Inputs being a function of gearing status dependent on the ratio established
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2556/00—Input parameters relating to data
- B60W2556/10—Historical data
-
- 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
- F16H2061/0075—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 a particular control method
- F16H2061/0087—Adaptive control, e.g. the control parameters adapted by learning
Abstract
The application relates to a correction method of a vehicle gear shifting point, which comprises the steps of collecting driving data of a vehicle, wherein the driving data comprise the rotating speed of an output shaft, the vehicle speed, the longitudinal acceleration, the opening degree of an accelerator pedal, a load coefficient and a current driving mode; identifying a running working condition of the vehicle, wherein the running working condition comprises any one of a starting working condition, a traveling working condition and a parking working condition; updating the driving style indication value of the vehicle according to the driving working condition and the driving data; and determining a gear shifting point correction coefficient and a corrected gear shifting point according to the driving style indication value. According to the correction method, the short-time driving style of the driver is judged in real time according to the typical working conditions and the typical characteristic information in the driving process of the vehicle, the dynamic influence of the driving habit of the driver and the driving conditions such as roads and weather on the driving style is comprehensively considered, the driving style is quantized into the indication value, the gear shifting point is dynamically corrected according to the indication value of the driving style, the driving performance requirement of the driver in dynamic change can be met, and the driving experience is effectively improved.
Description
Technical Field
The application belongs to the technical field of control of automatic transmissions of automobiles, and particularly relates to a correction method for gear shifting points of a vehicle.
Background
The calculation of the gear shifting schedule, i.e., the gear shifting points, is one of the core contents of the electronic control software of the automatic transmission, and is an upper control command for determining when the automatic transmission starts to perform automatic gear shifting. The quality of the design of the gear shifting rule is the key for measuring whether the vehicle can fully exert the dynamic property, the economical efficiency and the driveability after adopting the automatic speed changing technology. At present, shift points are generally calculated by using an accelerator-vehicle speed two-parameter shift MAP on an automatic transmission, and a plurality of shift modes (such as an economy mode, a sport mode, a ramp mode, a plateau mode and the like) are designed to correspond to different shift MAPs to adapt to different road environments and driver requirements.
However, the existing various gear shifting mode settings such as ramp mode and plateau mode can only adapt to the road environment and the change of the demand of load on power, and can not meet the demands of drivers with different driving styles on economy and power under the same working condition; although the economic mode and the motion mode consider the requirements of different driving styles, the driver needs to select the economic mode and the motion mode manually, and once the economic mode and the motion mode are selected, the economic mode and the motion mode cannot be automatically changed according to the change of working conditions, so that the economic mode and the motion mode are difficult to adapt to the change of the economic power requirements under different working conditions. For the variable driving conditions, continuous and better driving experience can be obtained only by continuous manual operation of a driver, and the original purpose of reducing the operation load of the driver by automatic driving is violated.
In addition, the operation performance of a driver on the whole vehicle in the driving process is not only related to the character and the behavior habit (aggressiveness or mildness), but also influenced by the visibility and the change of the ground adhesion caused by the road condition (congestion or smoothness) and the weather condition (rain, snow and fog), even related to the body and the psychological state of the driver at that time, the reiterated driver has to slow down to drive carefully when meeting the congestion or the heavy fog and heavy rain, and the mild driver has a good road and weather condition, a higher safety factor and can choose to pass quickly when catching up time. For a single driver, different road and weather conditions, even different psychological states of the body, correspond to different driving performance requirements; for most families in China, the situation that family members share one vehicle needs to be more suitable for the driving performance of different driving styles among the family members.
Disclosure of Invention
In view of the above technical problems, the application provides a correction method for a vehicle shift point to meet the driving performance requirement of a driver for dynamic change and improve the driving experience.
The application provides a correction method of a vehicle gear shifting point, which comprises the following steps: the method comprises the following steps: acquiring running data of a vehicle, wherein the running data comprises the rotating speed of an output shaft, the vehicle speed, the longitudinal acceleration, the opening degree of an accelerator pedal, a load coefficient and the current driving mode; identifying the running condition of the vehicle, wherein the running condition comprises any one of a starting condition, a traveling condition and a parking condition; updating the driving style indication value of the vehicle according to the driving working condition and the driving data; and determining a gear shifting point correction coefficient and a corrected gear shifting point according to the driving style indication value.
In one embodiment, before the step of updating the driving style indication value of the vehicle according to the driving condition and the driving data, the method includes: and when the vehicle is started, determining an initial value of the driving style indication value according to the current driving mode.
In one embodiment, the updating the driving style indication value of the vehicle according to the driving condition and the driving data includes: determining the maximum accelerator opening and the average change rate of the accelerator opening under the starting condition according to the accelerator pedal opening under the starting condition; determining a first contribution amount of the driving style of the starting working condition to the driving style indication value according to the maximum accelerator opening and the average change rate of the accelerator opening; and updating the driving style indication value according to the first contribution amount.
In one embodiment, the condition for identifying the starting condition includes: if the rotating speed of the output shaft is greater than zero and less than a first rotating speed, entering the starting working condition; if the rotating speed of the output shaft is greater than a second rotating speed, ending the starting working condition; wherein the first rotational speed is less than the second rotational speed.
In one embodiment, the updating the driving style indication value of the vehicle according to the driving condition and the driving data further includes: in the traveling working condition, if the longitudinal acceleration is greater than or equal to a preset acceleration, a second contribution of the longitudinal acceleration to the driving style indication value is a forward contribution, and the driving style indication value is updated according to the forward contribution; in the traveling working condition, if the longitudinal acceleration is smaller than the preset acceleration, the second contribution amount of the longitudinal acceleration to the driving style indication value is a negative contribution amount, and the driving style indication value is updated according to the negative contribution amount.
In an embodiment, the method for acquiring the preset acceleration includes: and determining the preset acceleration according to the vehicle speed and the load coefficient.
In an embodiment, the method for obtaining the second contribution amount includes: determining a driving flexibility degree representation value according to the vehicle speed and the longitudinal acceleration; and determining the second contribution amount according to the driving flexibility degree representation value and the driving style indication value.
In one embodiment, before the step of updating the driving style indication value, the method further comprises: if the opening degree of the accelerator pedal under the advancing working condition is smaller than or equal to a preset opening degree, keeping the driving style indication value unchanged; and if the opening degree of the accelerator pedal under the advancing working condition is larger than the preset opening degree, executing the step of updating the driving style indication value.
In one embodiment, the updating the driving style indication value of the vehicle according to the driving condition and the driving data further includes: acquiring engine state information of the vehicle under the parking working condition; if the engine is stopped, clearing the driving style indication value; and if the engine is not stopped, keeping the driving style indication value unchanged, and identifying the starting working condition.
In one embodiment, determining a shift point correction factor and a corrected shift point according to the driving style indication value includes: determining a basic gear shifting point according to the opening degree of the accelerator pedal, the rotating speed of the output shaft and the current driving mode; determining the gear shifting point correction coefficient according to the accelerator pedal opening, the driving style indication value and the current driving mode; determining the corrected shift point according to the following formula:
P′＝a*P
wherein P' represents the corrected shift point, a represents the shift point correction factor, and P represents the base shift point.
In one embodiment, the correction method includes: setting a value range corresponding to the driving style indication value and a value range corresponding to the gear shifting point correction coefficient according to the driving mode of the vehicle; wherein the driving modes comprise an economy mode, a normal mode and a sport mode.
The application provides a correction method of vehicle shift point, the driver's that adapts to different driving styles through the correction of shift point is to the demand of whole car dynamic property, economic nature to and the same driver is to the change of the produced drivability demand of different driving conditions, satisfy driver dynamic change's drivability demand, effectively promote driving experience.
Drawings
Fig. 1 is a schematic flowchart of a modification method according to an embodiment of the present application;
fig. 2 is a schematic specific flowchart of a correction method according to a second embodiment of the present application.
Detailed Description
The technical solution of the present application is further described in detail with reference to the drawings and specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 1 is a schematic flowchart of a correction method according to an embodiment of the present application. As shown in fig. 1, the modification method of the present application may include the steps of:
step S101: acquiring running data of a vehicle, wherein the running data comprises the rotating speed of an output shaft, the vehicle speed, the longitudinal acceleration, the opening degree of an accelerator pedal, a load coefficient and the current driving mode;
step S102: identifying the running condition of the vehicle, wherein the running condition comprises any one of a starting condition, a traveling condition and a parking condition;
step S103: updating the driving style indication value of the vehicle according to the driving working condition and the driving data;
step S104: and determining a gear shifting point correction coefficient and a corrected gear shifting point according to the driving style indication value.
Specifically, in step S101, the vehicle control unit TCU may acquire driving data such as the output shaft speed, the vehicle speed, the longitudinal acceleration, the accelerator pedal opening, the load factor, and the current driving mode of the vehicle from the relevant sensors and the CAN network according to a specific sampling period.
Specifically, in step S102, the driving condition of the vehicle may be identified according to the collected driving data; optionally, the identification condition of the starting condition comprises: if the rotating speed of the output shaft is greater than zero and less than the first rotating speed, entering a starting working condition; if the rotating speed of the output shaft is greater than the second rotating speed, ending the starting working condition; further, if the rotating speed of the output shaft is greater than the second rotating speed, the vehicle is in a running working condition; if the rotating speed of the output shaft is zero, the vehicle is in a parking working condition; wherein the first rotational speed is less than the second rotational speed.
In one embodiment, before step S103, the method includes:
when the vehicle is started, the initial value of the driving style indication value is determined according to the current driving mode.
Specifically, when the vehicle is started, an initial value is given to the driving style indication value; optionally, the initial value of the driving style indication value may be calibrated according to the driving mode, and different initial values are given to the driving style indication value according to different driving modes; the driving mode comprises an economy mode, a common mode and a sport mode. Preferably, the initial value for the economy mode is 0, the initial value for the sport mode is 100, and the initial value for the normal mode is 50.
In one embodiment, step S103: according to the driving condition and the driving data, the driving style indication value of the vehicle is updated, and the method comprises the following steps:
determining the maximum accelerator opening and the average change rate of the accelerator opening under the starting condition according to the accelerator pedal opening under the starting condition;
determining a first contribution amount of the driving style of the starting working condition to the driving style indication value according to the maximum accelerator opening and the average change rate of the accelerator opening;
and updating the driving style indication value according to the first contribution amount.
Specifically, the depths and speeds of stepping on the accelerator by drivers with different driving styles are greatly different in the starting process, so that the starting working condition is a typical working condition represented by different driving styles. Optionally, performing data analysis on the opening degree of an accelerator pedal under the starting condition, and determining the maximum opening degree of the accelerator and the average change rate of the opening degree of the accelerator under the starting condition; inquiring a calibratable test data table T1 according to the maximum accelerator opening and the average change rate of the accelerator opening to obtain a first contribution amount of the driving style of the starting working condition to the driving style indication value; further, a new driving style indication value is obtained by adding the first contribution amount on the basis of the current driving style indication value.
In one embodiment, step S103: according to the driving condition and the driving data, the driving style indication value of the vehicle is updated, and the method further comprises the following steps:
in the traveling working condition, if the longitudinal acceleration is greater than or equal to the preset acceleration, the second contribution of the longitudinal acceleration to the driving style indication value is a forward contribution, and the driving style indication value is further updated according to the forward contribution;
and in the running working condition, if the longitudinal acceleration is smaller than the preset acceleration, the second contribution of the longitudinal acceleration to the driving style indication value is a negative contribution, and the driving style indication value is further updated according to the negative contribution.
Specifically, during the vehicle traveling process, the longitudinal acceleration is comprehensive representation information of the driving habits of the driver, the psychological and physical conditions thereof, the road and weather conditions, and the like, and therefore, the driving style of the vehicle traveling process can be judged using the longitudinal acceleration as the characteristic information. Optionally, in the traveling working condition, when the longitudinal acceleration is greater than or equal to the preset acceleration, the second contribution amount of the longitudinal acceleration to the driving style indication value is a forward increment, and the forward increment is further added on the basis of the current driving style indication value to obtain a new driving style indication value; and when the longitudinal acceleration is smaller than the preset acceleration, the second contribution of the longitudinal acceleration to the driving style indication value is negative increment, and the negative increment is further added to the current driving style indication value to obtain a new driving style indication value.
Optionally, the preset acceleration obtaining method includes: and determining a preset acceleration according to the vehicle speed and the load coefficient.
Specifically, considering different road load conditions, the measurement criteria of the degree of acceleration will expressed by the driver through the longitudinal acceleration are different, for example, in the case of an uphill slope and a high vehicle speed, a relatively small acceleration may be insufficient acceleration capability due to a large vehicle load, and does not represent that the acceleration will be weak for the driver. Therefore, according to the vehicle speed and the load coefficient, inquiring a calibratable test data table T2 to obtain a preset acceleration; and further judging the strength of the acceleration intention of the driver by comparing the magnitude relation between the longitudinal acceleration value and the preset acceleration, thereby obtaining whether the second contribution of the longitudinal acceleration to the driving style indication value is positive or negative.
Optionally, the method for obtaining the second contribution amount includes: determining a driving flexibility degree representation value according to the vehicle speed and the longitudinal acceleration; and determining a second contribution amount according to the driving flexibility degree representation value and the driving style indication value. The driving incentive flexibility degree characteristic value comprises a driving incentive degree characteristic value and a driving gentleness degree characteristic value.
Specifically, when the longitudinal acceleration is greater than or equal to the preset acceleration, the calibratable test data table T3 is queried according to the vehicle speed and the longitudinal acceleration to obtain a characteristic value of the driving severity of the driver at present, and a larger characteristic value of the driving severity represents a stronger driving at present, and the acceleration will be stronger. In order to ensure that the driving demand change of a driver can be quickly responded when the driving style is switched, and simultaneously, the relative stability of the driving style is considered, after the characteristic value of the driving intensity degree is obtained, the current driving style indication value is further combined, the calibratable test data table T4 is inquired, and the forward contribution quantity of the longitudinal acceleration to the driving style indication value is obtained.
Similarly, when the longitudinal acceleration is smaller than the preset acceleration, the calibratable test data table T5 is inquired according to the vehicle speed and the longitudinal acceleration to obtain a mild degree characteristic value of the current driving of the driver, wherein the larger the driving mild degree characteristic value is, the gentler the current driving is, and the weaker the acceleration will is. And further inquiring a calibratable test data table T6 according to the driving temperature characteristic value and the current driving style indication value to obtain the negative contribution of the longitudinal acceleration to the driving style indication value.
It is worth mentioning that, before the step of updating the driving style indication value, the method comprises:
if the opening degree of the accelerator pedal under the running working condition is smaller than or equal to the preset opening degree, keeping the driving style indication value unchanged;
and if the opening degree of the accelerator pedal under the running working condition is larger than the preset opening degree, executing the step of updating the driving style indication value.
Specifically, considering that the deceleration has no great significance on the judgment of economy and dynamic performance, only the contribution of the longitudinal acceleration to the driving style indication value in the forward driving is considered; therefore, when the accelerator pedal opening is smaller than or equal to the preset accelerator opening, the negative contribution amount calculated according to the undersized or negative longitudinal acceleration is not counted, that is, when the accelerator pedal opening is smaller than or equal to the preset accelerator opening, the current driving style indication value is not adjusted, that is, the current driving style indication value is kept unchanged.
In one embodiment, step S103: according to the driving condition and the driving data, the driving style indication value of the vehicle is updated, and the method further comprises the following steps:
acquiring engine state information of a vehicle under a parking working condition;
if the engine is stopped, clearing the driving style indication value;
and if the engine is not stopped, keeping the driving style indication value unchanged, and identifying a starting working condition.
Specifically, when the vehicle stops but is not flameout, if temporary stopping of a traffic light occurs, the driving style indication value is kept unchanged, the driving style indication value is stored, meanwhile, the starting working condition is identified, and when the vehicle is to be identified to enter the starting working condition, the stored driving style indication value is used as an input indication value of the starting working condition; when the vehicle stops and is flamed out, the driving style indication value is cleared, and when the vehicle restarts, the initial indication value is endowed again.
In one embodiment, step S104: according to the driving style indication value, determining a gear shifting point correction coefficient and a gear shifting point after correction, comprising the following steps:
determining a basic gear shifting point according to the opening degree of an accelerator pedal, the rotating speed of an output shaft and the current driving mode;
and determining a gear shifting point correction coefficient according to the opening degree of the accelerator pedal, the driving style indication value and the current driving mode.
Optionally, the corrected shift point is determined according to the following formula:
P′＝a*P
where P' represents the corrected shift point, a represents the shift point correction factor, and P represents the base shift point.
Specifically, according to the opening degree of an accelerator pedal and the rotating speed of an output shaft, a gear shifting test data table T7 corresponding to the current driving mode is inquired to obtain a basic gear shifting point; and inquiring a calibratable correction coefficient table T8 corresponding to the current driving mode according to the driving style indication value and the opening degree of the accelerator pedal to obtain a gear shifting point correction coefficient. Preferably, different calibratable correction coefficient tables are set for different driving modes, so that the initial positioning purpose of the driving requirements of the different driving modes is considered for correcting the gear shifting points, and meanwhile, a calibration engineer is allowed to finely correct the corresponding gear shifting points for different accelerator areas, so that the driving dynamics, economy and comfort are fully balanced.
In one embodiment, the correction method provided by the present application includes:
and setting a value range corresponding to the driving style indication value and a value range corresponding to the gear shifting point correction coefficient according to the driving mode of the vehicle.
Alternatively, the driving style indicator values are collectively defined in the [0,100] interval, where 0 represents the most economical and gentler driving preference, 100 represents the most dynamic and aggressive driving preference, and the median values represent the driver's relatively gentler or aggressive driving preference to varying degrees on the style scale determined by 0 and 100.
Furthermore, the selection of the driving mode is provided with a certain driving performance requirement bias, such as an economic mode bias towards an energy-saving requirement, and a sport mode bias towards a power requirement, and meanwhile, in the selected driving mode, the driving style of a driver can be changed due to various objective or subjective reasons, different driving style indication value limiting ranges are set for different driving modes, and the gear shifting point is allowed to be properly corrected through the change of the driving style indication value in the specified range under the selected driving mode, so that the requirement change of the driving performance brought by the change of the driving style of the driver is adapted to a certain extent.
Preferably, in the economy mode, the driving style indication value is limited to a range of [0,50]; in sport mode, the driving style indication value is limited to [50,100]; in other general modes besides this, the driving style is limited to the range of [0,100].
Further, for the economic mode, setting the value range of the corresponding shift point correction coefficient to be more than or equal to 1 and less than or equal to 2; when the α =1, the corresponding driving style indication value is 0, that is, the initial driving style indication value of the economy mode corresponds to the default shift point; according to the change of the driving style index value, the gear shifting point of the economy mode is allowed to be adjusted to the dynamic driving performance within a certain range.
Further, for the motion mode, setting the value range of the correction coefficient of the corresponding gear shifting point to be more than 0 and less than or equal to 1; when the α =1, the corresponding driving style indication value is 100, that is, the initial driving style indication value of the sport mode corresponds to the default shift point; according to the change of the driving style index value, the gear shifting point of the sport mode is allowed to be adjusted in the moderate driving performance within a certain range.
Further, for other common modes except the economic mode and the motion mode, setting the value range of the correction coefficient of the corresponding gear shifting point to be more than or equal to 0 and less than or equal to 2; when the α =1, the corresponding driving style indication value is 50, that is, the initial driving style indication value of the normal mode corresponds to the default shift point; according to the change of the driving style index value, the gear shifting point of the common mode is allowed to be adjusted towards the mildness and dynamic driving performance in a certain range.
According to the method for correcting the vehicle shift points, the driving style is quantized into the indication values, and the shift points are dynamically corrected according to the driving style indication values, so that the driving performance requirements of a driver for dynamic change can be flexibly met, and the driving experience is effectively improved.
Fig. 2 is a schematic specific flowchart of a correction method according to a second embodiment of the present application. As shown in fig. 2, the modification method of the present application may include the steps of:
step S201: when the vehicle is started, determining an initial indication value of a driving style according to a current driving mode of the vehicle;
step S202: determining a first contribution amount of the driving style of the starting working condition to the driving style indication value according to the maximum accelerator opening and the average accelerator opening change rate of the vehicle under the starting working condition, and updating the current driving style indication value according to the first contribution amount;
step S203: determining a second contribution amount of the longitudinal acceleration to the driving style indication value according to the relation between the longitudinal acceleration of the vehicle under the running working condition and the preset acceleration, and updating the current driving style indication value according to the second contribution amount;
step S204: judging whether the vehicle is flameout under the parking working condition;
if the vehicle is turned off in the parking condition, step S205 is executed: clearing the current driving style indication value and returning to the step S201;
if the vehicle is not turned off in the parking condition, step S206 is executed: the current driving style indication value is kept unchanged, and the process returns to step S202.
Exemplarily, when the vehicle is started, according to a current driving mode selected by a driver, giving an initial value to the driving style indication value to obtain an initial indication value of the driving style; further, determining a first contribution amount according to the maximum accelerator opening and the average change rate of the accelerator opening in the vehicle starting process, adding the first contribution amount on the basis of the driving style initial indication value to obtain a driving style first indication value, and updating the current driving style indication value into the driving style first indication value; further, determining a second contribution amount according to the longitudinal acceleration of the vehicle in the traveling process, adding the second contribution amount on the basis of the current driving style indication value to obtain a driving style second indication value, and updating the current driving style indication value into the driving style second indication value; further, when the vehicle is parked and flamed out, the second driving style indication value obtained in the vehicle running process is cleared, namely the current driving style indication value is updated to zero, and when the vehicle is restarted, the initial value is given to the driving style indication value. And when the vehicle is not flamed out during parking, keeping the current driving style indication value unchanged, namely the current driving style indication value is still the second indication value of the driving style, and simultaneously starting the recognition of the starting working condition.
Exemplarily, when the vehicle is parked and is not shut down, for example, the vehicle is temporarily parked when a traffic light is emitted, the current driving style indication value of the vehicle is kept unchanged, and the current driving style indication value is stored; further, when the vehicle starts, determining a first contribution amount according to the maximum accelerator opening and the average accelerator opening change rate in the vehicle starting process, adding the first contribution amount on the basis of the driving style indication value stored in the parking working condition to obtain a first driving style indication value, and updating the current driving style indication value into the first driving style indication value; further, in the vehicle traveling process, determining a second contribution amount according to the longitudinal acceleration of the vehicle in the traveling process, adding the second contribution amount on the basis of the current driving style indication value to obtain a driving style second indication value, and updating the current driving style indication value into the driving style second indication value; further, when the vehicle is parked and flamed out, the current driving style indication value is cleared, and when the vehicle is restarted, the initial value is given to the driving style indication value.
The current driving style indication value in the traveling process comprises any one of a first indication value of the driving style obtained in the starting process and a driving style indication value obtained in the last acceleration cycle in the traveling process; specifically, the contribution determined by the nth acceleration cycle is added on the basis of the driving style indication value obtained by the (n-1) th acceleration cycle to obtain the driving style indication value of the nth acceleration cycle; wherein n is an integer greater than 1; and adding the contribution determined by the 1 st acceleration period to the first indication value of the driving style obtained in the starting process to obtain the indication value of the driving style of the 1 st acceleration period.
According to the correction method provided by the embodiment of the application, the driving style indication value is calculated in real time based on the starting, advancing and parking processes of the vehicle, so that the short-time driving style of the driver is judged in real time, the driving performance requirement of the driver in dynamic change is flexibly met, and the driving experience is effectively improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, which may include other elements not expressly listed in addition to those listed.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A method of correcting a shift point of a vehicle, characterized by comprising:
acquiring running data of a vehicle, wherein the running data comprises the rotating speed of an output shaft, the vehicle speed, the longitudinal acceleration, the opening degree of an accelerator pedal, a load coefficient and the current driving mode;
identifying a running working condition of the vehicle, wherein the running working condition comprises any one of a starting working condition, a traveling working condition and a parking working condition;
updating the driving style indication value of the vehicle according to the driving working condition and the driving data;
and determining a gear shifting point correction coefficient and a corrected gear shifting point according to the driving style indication value.
2. The correction method according to claim 1, characterized in that before the step of updating the driving style indication value of the vehicle according to the driving condition and the driving data, it comprises:
and when the vehicle is started, determining an initial value of the driving style indication value according to the current driving mode.
3. The correction method according to claim 1 or 2, wherein the updating of the driving style indicator of the vehicle according to the driving condition and the driving data comprises:
determining the maximum accelerator opening and the average change rate of the accelerator opening under the starting condition according to the accelerator pedal opening under the starting condition;
determining a first contribution amount of the driving style of the starting working condition to the driving style indication value according to the maximum accelerator opening and the average accelerator opening change rate;
and updating the driving style indication value according to the first contribution amount.
4. The correction method according to claim 3, wherein the identification condition of the take-off condition includes:
if the rotating speed of the output shaft is greater than zero and less than a first rotating speed, entering the starting working condition;
if the rotating speed of the output shaft is greater than a second rotating speed, ending the starting working condition;
wherein the first rotational speed is less than the second rotational speed.
5. The correction method according to claim 1, wherein the updating of the driving style indicator of the vehicle according to the driving condition and the driving data further comprises:
in the traveling working condition, if the longitudinal acceleration is greater than or equal to a preset acceleration, a second contribution of the longitudinal acceleration to the driving style indication value is a forward contribution, and the driving style indication value is updated according to the forward contribution;
in the traveling working condition, if the longitudinal acceleration is smaller than the preset acceleration, the second contribution amount of the longitudinal acceleration to the driving style indication value is a negative contribution amount, and the driving style indication value is updated according to the negative contribution amount.
6. The correction method according to claim 5, wherein the preset acceleration obtaining method includes:
and determining the preset acceleration according to the vehicle speed and the load coefficient.
7. The correction method according to claim 5, characterized in that the method of obtaining the second contribution amount includes:
determining a driving flexibility degree representation value according to the vehicle speed and the longitudinal acceleration;
and determining the second contribution amount according to the driving flexibility degree characterization value and the driving style indication value.
8. The correction method according to claim 5, characterized in that it comprises, before said step of updating said driving style indication, the steps of:
if the opening degree of the accelerator pedal under the advancing working condition is smaller than or equal to a preset opening degree, keeping the driving style indication value unchanged;
and if the opening degree of the accelerator pedal under the advancing working condition is larger than the preset opening degree, executing the step of updating the driving style indication value.
9. The correction method according to claim 1, wherein the updating of the driving style indicator of the vehicle according to the driving condition and the driving data further comprises:
acquiring engine state information of the vehicle under the parking working condition;
if the engine is stopped, clearing the driving style indication value;
and if the engine is not stopped, keeping the driving style indication value unchanged, and identifying the starting working condition.
10. The correction method according to claim 1, wherein determining a shift point correction factor and a corrected shift point based on the driving style indicator value comprises:
determining a basic gear shifting point according to the opening degree of the accelerator pedal, the rotating speed of the output shaft and the current driving mode;
determining the gear shifting point correction coefficient according to the accelerator pedal opening, the driving style indication value and the current driving mode;
determining the modified shift point according to the following formula:
P′＝a*P
wherein P' represents the corrected shift point, a represents the shift point correction factor, and P represents the base shift point.
11. The correction method according to claim 1, characterized in that the correction method comprises:
setting a value range corresponding to the driving style indication value and a value range corresponding to the gear shifting point correction coefficient according to the driving mode of the vehicle;
wherein the driving modes comprise an economy mode, a normal mode and a sport mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315021.9A CN115217948B (en) | 2021-11-08 | 2021-11-08 | Correction method for vehicle gear shifting point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315021.9A CN115217948B (en) | 2021-11-08 | 2021-11-08 | Correction method for vehicle gear shifting point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115217948A true CN115217948A (en) | 2022-10-21 |
| CN115217948B CN115217948B (en) | 2023-11-03 |
Family
ID=83606995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111315021.9A Active CN115217948B (en) | 2021-11-08 | 2021-11-08 | Correction method for vehicle gear shifting point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115217948B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906561A (en) * | 2023-09-14 | 2023-10-20 | 北京理工大学 | Vehicle gear shifting point optimal control method and system based on short-time driving style identification |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251512A (en) * | 1991-10-15 | 1993-10-12 | General Motors Corporation | Dynamic shift control for an automatic transmission |
| JPH07167274A (en) * | 1993-12-16 | 1995-07-04 | Mitsubishi Electric Corp | Shift control device for automatic transmission |
| EP0887220A1 (en) * | 1997-06-25 | 1998-12-30 | MAGNETI MARELLI S.p.A. | Method and device for controlling a transmission group of a vehicle |
| US5948034A (en) * | 1994-12-29 | 1999-09-07 | Iveco Fiat S.P.A. | Method of controlling a power unit of a vehicle |
| US6070118A (en) * | 1996-03-15 | 2000-05-30 | Toyota Jidosha Kabushiki Kaisha | Transmission control system using road data to control the transmission |
| KR20040021881A (en) * | 2002-09-05 | 2004-03-11 | 현대자동차주식회사 | Method controlling shift for an automatic transmission in a vehicle |
| FR2866284A1 (en) * | 2004-02-16 | 2005-08-19 | Peugeot Citroen Automobiles Sa | Traction chain driving device for motor vehicle, has control unit with driver interface to calculate wheel torque based on vehicle speed and acceleration, and calculate gearing reduction ratio based on torque, for calculating engine torque |
| US20080097674A1 (en) * | 2006-10-20 | 2008-04-24 | Toyota Jidosha Kabushiki Kaisha | Control apparatus and control method of a vehicle, program for realizing that control method using a computer, and recording medium on which that program is recorded |
| JP2010077998A (en) * | 2008-09-24 | 2010-04-08 | Nissan Motor Co Ltd | Device and method for shift control of continuously variable transmission |
| CN102563036A (en) * | 2012-02-28 | 2012-07-11 | 湖南大学 | Intelligent automatic-transmission matching method on basis of working conditions and driving intention |
| KR20130014133A (en) * | 2011-07-29 | 2013-02-07 | 콘티넨탈 오토모티브 시스템 주식회사 | Method and system for releasing sports mode of vehicle |
| US20130151093A1 (en) * | 2011-12-12 | 2013-06-13 | Hussein Dourra | Methods and system for using vehicle longitudinal acceleration for transmission control |
| DE102013104855A1 (en) * | 2012-12-27 | 2014-07-03 | Hyundai Motor Company | Method for actively controlling motor car by learning travel pattern, involves obtaining vehicle driving information, and changing shift pattern of gear box and control of motor torque with respect to determined travel mode |
| CN103935264A (en) * | 2014-04-29 | 2014-07-23 | 大连理工大学 | Method for calculating torque required by electric automobile driver |
| CN106763721A (en) * | 2016-11-29 | 2017-05-31 | 广州汽车集团股份有限公司 | A kind of vehicle automatic speed variator shift control method and device |
| CN107143649A (en) * | 2017-05-26 | 2017-09-08 | 合肥工业大学 | A kind of congestion industry and mining city and fluid drive gearshift update the system and its method |
| CN109882587A (en) * | 2019-01-31 | 2019-06-14 | 中国北方车辆研究所 | Special vehicle self shifter control system and method based on equivalent drag coefficient |
| CN113002545A (en) * | 2021-02-26 | 2021-06-22 | 北京汽车股份有限公司 | Vehicle control method and device and vehicle |
| CN113217620A (en) * | 2020-01-21 | 2021-08-06 | 上海汽车集团股份有限公司 | Gear shifting strategy adjusting method and related device |
-
2021
- 2021-11-08 CN CN202111315021.9A patent/CN115217948B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251512A (en) * | 1991-10-15 | 1993-10-12 | General Motors Corporation | Dynamic shift control for an automatic transmission |
| JPH07167274A (en) * | 1993-12-16 | 1995-07-04 | Mitsubishi Electric Corp | Shift control device for automatic transmission |
| US5948034A (en) * | 1994-12-29 | 1999-09-07 | Iveco Fiat S.P.A. | Method of controlling a power unit of a vehicle |
| US6070118A (en) * | 1996-03-15 | 2000-05-30 | Toyota Jidosha Kabushiki Kaisha | Transmission control system using road data to control the transmission |
| EP0887220A1 (en) * | 1997-06-25 | 1998-12-30 | MAGNETI MARELLI S.p.A. | Method and device for controlling a transmission group of a vehicle |
| KR20040021881A (en) * | 2002-09-05 | 2004-03-11 | 현대자동차주식회사 | Method controlling shift for an automatic transmission in a vehicle |
| FR2866284A1 (en) * | 2004-02-16 | 2005-08-19 | Peugeot Citroen Automobiles Sa | Traction chain driving device for motor vehicle, has control unit with driver interface to calculate wheel torque based on vehicle speed and acceleration, and calculate gearing reduction ratio based on torque, for calculating engine torque |
| US20080097674A1 (en) * | 2006-10-20 | 2008-04-24 | Toyota Jidosha Kabushiki Kaisha | Control apparatus and control method of a vehicle, program for realizing that control method using a computer, and recording medium on which that program is recorded |
| JP2010077998A (en) * | 2008-09-24 | 2010-04-08 | Nissan Motor Co Ltd | Device and method for shift control of continuously variable transmission |
| KR20130014133A (en) * | 2011-07-29 | 2013-02-07 | 콘티넨탈 오토모티브 시스템 주식회사 | Method and system for releasing sports mode of vehicle |
| US20130151093A1 (en) * | 2011-12-12 | 2013-06-13 | Hussein Dourra | Methods and system for using vehicle longitudinal acceleration for transmission control |
| CN102563036A (en) * | 2012-02-28 | 2012-07-11 | 湖南大学 | Intelligent automatic-transmission matching method on basis of working conditions and driving intention |
| DE102013104855A1 (en) * | 2012-12-27 | 2014-07-03 | Hyundai Motor Company | Method for actively controlling motor car by learning travel pattern, involves obtaining vehicle driving information, and changing shift pattern of gear box and control of motor torque with respect to determined travel mode |
| CN103935264A (en) * | 2014-04-29 | 2014-07-23 | 大连理工大学 | Method for calculating torque required by electric automobile driver |
| CN106763721A (en) * | 2016-11-29 | 2017-05-31 | 广州汽车集团股份有限公司 | A kind of vehicle automatic speed variator shift control method and device |
| CN107143649A (en) * | 2017-05-26 | 2017-09-08 | 合肥工业大学 | A kind of congestion industry and mining city and fluid drive gearshift update the system and its method |
| CN109882587A (en) * | 2019-01-31 | 2019-06-14 | 中国北方车辆研究所 | Special vehicle self shifter control system and method based on equivalent drag coefficient |
| CN113217620A (en) * | 2020-01-21 | 2021-08-06 | 上海汽车集团股份有限公司 | Gear shifting strategy adjusting method and related device |
| CN113002545A (en) * | 2021-02-26 | 2021-06-22 | 北京汽车股份有限公司 | Vehicle control method and device and vehicle |
Non-Patent Citations (3)
| Title |
|---|
| 刘玺;何仁;程秀生;: "基于驾驶员类型识别的双离合自动变速器换挡规律研究", 农业工程学报, no. 20, pages 76 - 81 * |
| 葛安林, 金辉, 张洪坤, 范巨新, 尹华兵: "一种汽车智能换挡体系的研究", 中国机械工程, no. 05, pages 106 - 109 * |
| 阴晓峰;陈桥松;: "汽车有级自动变速器换挡规律研究进展", 西华大学学报(自然科学版), no. 04, pages 78 - 84 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906561A (en) * | 2023-09-14 | 2023-10-20 | 北京理工大学 | Vehicle gear shifting point optimal control method and system based on short-time driving style identification |
| CN116906561B (en) * | 2023-09-14 | 2023-12-08 | 北京理工大学 | Vehicle gear shifting point optimal control method and system based on short-time driving style identification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115217948B (en) | 2023-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6303221B2 (en) | Shift control method for automatic transmission for vehicle | |
| US8249788B2 (en) | Information method of economical driving for manual transmission vehicle | |
| US6216068B1 (en) | Method for driver-behavior-adaptive control of a variably adjustable motor vehicle accessory | |
| RU2520198C2 (en) | Determination of one or more gearshift points | |
| RU2505725C2 (en) | Method of gearshift point determination | |
| US9121721B2 (en) | Navigation method and navigation device | |
| AU2012338343A1 (en) | Fuel saving-aimed motor vehicle driving style evaluation | |
| US8548670B2 (en) | Fuel-saving driving diagnostic device, fuel-saving driving diagnostic system, travel control device, fuel-saving driving rating device, and fuel-saving driving diagnostic method | |
| EP2359032B1 (en) | Gear feedback system | |
| CN108488375A (en) | A kind of method of vehicle automatic transmission shift quality under improvement accelerating mode | |
| US7917267B2 (en) | Method to determine an optimized shift point, in particular upshift point, for a manual transmission | |
| EP2867562B1 (en) | Transmission control system | |
| CN115217948A (en) | Correction method for vehicle gear shifting point | |
| US11118678B2 (en) | Vehicle control device and vehicle control method | |
| JP6932988B2 (en) | Vehicle control unit | |
| CN111561561A (en) | Method for improving energy consumption economy of automobile | |
| CN111350811A (en) | Vehicle and gear selecting method and device of transmission of vehicle | |
| CN110651141B (en) | Vehicle control device | |
| WO2018207823A1 (en) | Vehicle control device and vehicle control method | |
| WO2018207860A1 (en) | Vehicle control device | |
| CN107989704B (en) | Engine gear shifting prompt parameter acquisition system and method | |
| CN110651140B (en) | Vehicle control device and vehicle control method | |
| JP6848668B2 (en) | Vehicle control device | |
| CN114834450A (en) | Oil-saving control method and device based on acceleration working condition and vehicle | |
| CN108980341B (en) | Method for estimating upshift rotating speed point of automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |