CN117662742A - Vehicle gear adjusting method, device, equipment and storage medium - Google Patents
Vehicle gear adjusting method, device, equipment and storage medium Download PDFInfo
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- CN117662742A CN117662742A CN202311362142.8A CN202311362142A CN117662742A CN 117662742 A CN117662742 A CN 117662742A CN 202311362142 A CN202311362142 A CN 202311362142A CN 117662742 A CN117662742 A CN 117662742A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H2061/0012—Transmission control for optimising power output of driveline
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Abstract
The embodiment of the invention discloses a vehicle gear adjusting method, a device, equipment and a storage medium, wherein the method comprises the following steps: acquiring vehicle efficiency information of a target vehicle, and determining a target gear efficiency curve according to the vehicle efficiency information; determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter; and adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve. The technical scheme of the embodiment of the invention solves the problem that the lifting gear of the electric automobile cannot be adjusted in the prior art, can adjust the gear shifting curve of the lifting gear of the automobile from the angles of economy, dynamic property and drivability, and can realize the effect of saving energy consumption on the premise of ensuring that the dynamic property and drivability meet the requirements of the whole automobile.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric automobiles, in particular to a vehicle gear adjusting method, a device, equipment and a storage medium.
Background
The economical index is one of the most important performance indexes in the development process of the heavy commercial vehicle, and the energy consumption level of the heavy commercial vehicle determines the public praise and market performance of the heavy commercial vehicle to a certain extent. The electric control mechanical automatic transmission is widely applied to the field of heavy-duty commercial vehicles due to the characteristics of high transmission efficiency, low cost, high cost performance and the like. At present, the existing gear shift adjustment technology is mostly suitable for the downshifting of the fuel oil vehicle, and is not suitable for an adjustment scheme of a gear line in the process of the upshifting of the electric vehicle.
Disclosure of Invention
The embodiment of the invention provides a vehicle gear adjusting method, device, equipment and storage medium, which can realize the effect of saving energy consumption on the premise of ensuring that the power performance and the drivability meet the requirements of a whole vehicle.
In a first aspect, an embodiment of the present invention provides a vehicle gear adjustment method, including:
acquiring vehicle efficiency information of a target vehicle, and determining a target gear efficiency curve according to the vehicle efficiency information;
determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter;
and adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve.
In a second aspect, an embodiment of the present invention provides a vehicle gear adjustment device, including:
the gear efficiency curve determining module is used for acquiring vehicle efficiency information of a target vehicle and determining a target gear efficiency curve according to the vehicle efficiency information;
the power driving parameter determining module is used for determining target power driving parameters according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter;
and the target gear shifting curve determining module is used for adjusting the vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve.
In a third aspect, an embodiment of the present invention provides a computer apparatus, including:
one or more processors;
a memory for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the vehicle gear adjustment method of any of the embodiments.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements the vehicle gear adjustment method according to any of the embodiments.
According to the technical scheme provided by the embodiment of the invention, the vehicle efficiency information of the target vehicle is obtained, and the target gear efficiency curve is determined according to the vehicle efficiency information; determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter; and adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve. The technical scheme of the embodiment of the invention solves the problem that the lifting gear of the electric automobile cannot be adjusted in the prior art, can adjust the gear shifting curve of the lifting gear of the automobile from the angles of economy, dynamic property and drivability, and can realize the effect of saving energy consumption on the premise of ensuring that the dynamic property and drivability meet the requirements of the whole automobile.
Drawings
FIG. 1 is a flowchart of a method for adjusting a vehicle gear according to an embodiment of the present invention;
FIG. 2 is a flowchart of a further method for adjusting a vehicle gear according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a space coordinate plane according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a gear efficiency curve provided by an embodiment of the present invention;
FIG. 5 is a workflow diagram of a vehicle gear adjustment provided by an embodiment of the present invention;
fig. 6 is a schematic structural view of a vehicle gear adjusting device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are intended to be within the scope of the present invention.
Fig. 1 is a flowchart of a vehicle gear adjustment method provided by an embodiment of the present invention, where the embodiment of the present invention is applicable to a scenario in which a shift line of a vehicle is adjusted, the method may be performed by a vehicle gear adjustment device, and the device may be implemented by software and/or hardware.
As shown in fig. 1, the vehicle gear adjustment method includes the steps of:
s110, acquiring vehicle efficiency information of a target vehicle, and determining a target gear efficiency curve according to the vehicle efficiency information.
The target vehicle may be a vehicle whose shift line needs to be adjusted. Alternatively, the target vehicle may be an electric vehicle. The vehicle efficiency information may be a target vehicle individual transmission energy consumption efficiency curve. Specifically, the vehicle efficiency information includes a plurality of preset vehicle efficiency curves. The preset vehicle efficiency curve may be an efficiency curve of a preset vehicle index. Specifically, the preset vehicle efficiency curve includes: an electricity consumption efficiency curve, a battery charge and discharge efficiency curve, a motor efficiency curve, a gearbox efficiency curve and an accessory efficiency curve. The statistical analysis can be performed on experimental result data of each preset vehicle index of the target vehicle, so as to obtain each preset vehicle efficiency curve.
Further, the target gear efficiency curve may be a vehicle power consumption efficiency curve of the target vehicle at each gear. Specifically, the target gear efficiency curve may be determined from a preset vehicle efficiency curve at each gear. Specifically, the energy consumption efficiency curve of the whole vehicle in each gear can be determined by a preset vehicle efficiency curve, and then the target gear efficiency curve is determined based on the energy consumption efficiency curve of each gear.
S120, determining target power driving parameters according to the target gear efficiency curve and the gear attribute information.
The target power driving parameter may be a parameter related to the target vehicle determined from the viewpoint of power and drivability. Specifically, the target power driving parameter includes a target power parameter and a target driving parameter. The target power parameter may be a relevant parameter of the target vehicle determined from a power perspective. The target driving parameter may be a relevant parameter of the target vehicle determined from the viewpoint of drivability. Further, the shift position attribute information may be acceleration distribution information at the time of up-down shift of the target vehicle. The gear attribute information may be used to solve for the target power parameter.
By determining the target power parameter and the target driving parameter, the gear line of the target vehicle can be conveniently adjusted from the angles of power performance and drivability, and the economical efficiency of the gear line is improved, and meanwhile, the drivability and the power performance are considered.
And S130, adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve.
The target shift curve may be, among other things, a gear line of the target vehicle that is ultimately determined. Specifically, a corresponding adjustable lifting gear interval can be determined based on a target gear efficiency curve, and then a vehicle gear shifting curve is adjusted based on the lifting gear interval and a target power parameter to obtain a preliminary gear shifting curve; and adjusting the preliminary gear shifting curve based on the gear lifting interval and the target driving parameter to obtain a target gear shifting curve.
Specifically, corresponding parameter thresholds may be preset from the viewpoints of dynamics and drivability, respectively, to obtain a reference dynamics parameter threshold and a reference driving parameter threshold. When the value of the target power parameter is smaller than the reference power parameter threshold value, the vehicle shift curve can be adjusted in the target lifting gear interval based on the target power parameter, and a preliminarily adjusted shift line, namely a preliminary shift curve, is obtained. Furthermore, the value of the target driving parameter and the reference driving parameter threshold value can be compared, and the preliminary shift curve can be adjusted in the target upshift/downshift interval based on the target driving parameter under the condition that the value of the target driving parameter is smaller than the reference driving parameter threshold value, so as to obtain the target shift curve.
According to the technical scheme provided by the embodiment of the invention, the vehicle efficiency information of the target vehicle is obtained, and the target gear efficiency curve is determined according to the vehicle efficiency information; determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter; and adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve. The technical scheme of the embodiment of the invention solves the problem that the lifting gear of the electric automobile cannot be adjusted in the prior art, can adjust the gear shifting curve of the lifting gear of the automobile from the angles of economy, dynamic property and drivability, and can realize the effect of saving energy consumption on the premise of ensuring that the dynamic property and drivability meet the requirements of the whole automobile.
Fig. 2 is a flowchart of another vehicle gear adjustment method provided by the embodiment of the present invention, where the embodiment of the present invention is applicable to a scenario in which a shift line of a vehicle is adjusted, and on the basis of the above embodiment, how to obtain vehicle efficiency information of a target vehicle, determine a target gear efficiency curve according to the vehicle efficiency information, and adjust a vehicle shift curve of the target vehicle based on the target gear efficiency curve and a target power driving parameter, so as to obtain a target shift curve. The apparatus may be implemented in software and/or hardware, and integrated into a computer device having application development functionality.
As shown in fig. 2, the vehicle gear adjustment method includes the steps of:
s210, at least one preset vehicle efficiency curve of the target vehicle is obtained.
The target vehicle may be a vehicle whose shift line needs to be adjusted. Alternatively, the target vehicle may be an electric vehicle. The preset vehicle efficiency curve may be an efficiency curve of a preset vehicle index. Specifically, the preset vehicle efficiency curve includes: an electricity consumption efficiency curve, a battery charge and discharge efficiency curve, a motor efficiency curve, a gearbox efficiency curve and an accessory efficiency curve. The statistical analysis can be performed on experimental result data of each preset vehicle index of the target vehicle, so as to obtain each preset vehicle efficiency curve.
S220, determining a gear efficiency curve of each vehicle gear according to the preset vehicle efficiency curve, and determining a target gear efficiency curve according to the gear efficiency curve.
The gear efficiency curve may be a power consumption efficiency curve of a transmission system corresponding to each gear of the target vehicle. The gear efficiency curve may be determined from a preset vehicle efficiency curve. Specifically, each preset vehicle efficiency curve can be substituted into a preset gear efficiency curve solving formula to obtain a gear efficiency curve of each vehicle gear of the target vehicle.
Further, the target gear efficiency curve may be a vehicle power consumption efficiency curve of the target vehicle at each gear. Specifically, the target gear efficiency curve may be determined from the respective gear efficiency curves. Specifically, each gear efficiency curve can be mapped in a preset space coordinate system to obtain a gear space coordinate plane; and determining coordinate plane boundary lines based on the boundary lines of the space coordinate planes of the gears, and taking the coordinate plane boundary lines as target gear efficiency curves.
The horizontal axis of the preset space coordinate system is motor torque, the vertical axis is motor rotating speed, and the vertical axis is battery charge state. The gear space coordinate plane may be a space coordinate plane corresponding to the gear efficiency curve in a preset space coordinate system. Furthermore, the boundary line of each gear space coordinate plane can be marked, and the marked line is taken as the coordinate plane boundary line, namely the target gear efficiency curve.
Fig. 3 is a schematic diagram of a spatial coordinate plane according to an embodiment of the present invention. As shown in fig. 3, the coordinate planes of different colors may represent gear efficiency curves of different gears, and the target gear efficiency curve may be determined according to the boundary line of each spatial coordinate plane. Fig. 4 is a schematic diagram of a gear efficiency curve according to an embodiment of the present invention.
The coordinate plane boundary line may reflect the situation where the power consumption efficiency of the target vehicle is optimal at each gear. The target gear efficiency curve may be a curve corresponding to the gear efficiency of the target vehicle determined from the viewpoint of economy when the gear efficiency of the target vehicle is maximized. The target gear efficiency curve can be used as a reference curve for adjusting the gear line of the target vehicle subsequently, and the economy of the adjusted gear line is improved.
Illustratively, the main steps in determining the target gear efficiency curve are as follows:
s1, determining a target vehicle.
S2, building a whole vehicle model: according to the design target of the product, a whole vehicle electricity consumption calculation model is established, and the electricity consumption model for working condition electricity consumption calculation is as follows:
wherein: ge (ne, te) is motor efficiency; ne is the transient motor speed of the working condition; te is the transient motor torque of the working condition; ff is the instantaneous rolling resistance of the working condition; fw is the transient air resistance of the working condition; fj is the transient acceleration resistance of the working condition; fi is the transient gradient resistance of each working condition; ig. i0 is a transient gear speed ratio and a drive axle speed ratio respectively; ηt1, ηt2 and ηt3 are battery charge-discharge efficiency, transmission efficiency and inverter efficiency respectively; r is the tire rolling radius; k is the electricity consumption calculation unit conversion coefficient; fθi is motor hysteresis correction torque;
s3, calculating the charge and discharge efficiency of the battery: the battery equivalent is an equivalent circuit model, and the calculation formula of the battery loop current is as follows:
the calculation formula of the battery charging efficiency and the battery discharging efficiency is as follows:
wherein eta bat_c For battery charging efficiency eta bat_d For discharging efficiency of battery E SOC,T Battery electromotive force changing with SOC and temperature; r is R SOC,T The internal resistance of the battery changes along with the SOC and the temperature; pm is the input and output power of the motor;charging efficiency for the battery; />The discharge efficiency of the battery is achieved; p (P) b The power is input and output to the battery; i bat A battery loop current; u (U) bat Is the battery terminal voltage.
Substituting the battery loop current formula into a battery charging efficiency and discharging efficiency calculation formula to calculate the battery efficiency distribution under the conditions of different SOCs, different input power and different output power.
S4, calculating motor efficiency distribution: and (5) according to the input of the efficiency test result of the motor rack, motor efficiency distribution of different motor speeds and torques is carried out.
S5, calculating efficiency distribution of the transmission: and (3) carrying out transmission efficiency distribution of different gears, different transmission speeds and different transmission torques according to the input of the transmission rack efficiency test result.
S6, calculating accessory power distribution: and calculating the average power consumption of each accessory in the working condition interval according to the working condition power requirement of the vehicle to obtain the accessory power distribution.
Based on the power requirement of the running working condition of the vehicle, the power calculation part of the S2 formula can solve the output rotating speed and torque of the motor; the power consumption of accessories such as electromagnetic valves, fans, water pumps, PTC (thermal resistor) and the like under different environmental conditions is combined with the power consumption related to the motor, and the average power consumption of the accessories corresponding to the running working conditions is estimated and used for torque correction calculation;
s7, calculating the efficiency of different gear systems: calculating system efficiency of different gears, different SOCs, different rotating speeds and different torque conditions according to the calculated product of battery charge and discharge efficiency, motor efficiency and transmission efficiency;
calculating the efficiency distribution of the whole vehicle system according to the battery charge and discharge efficiency, the motor charge and discharge efficiency and the transmission efficiency calculated in the S3-S6;
system efficiency solution based on different gear, SOC, temperature, rotation speed and torque conditions
The system discharge efficiency distribution under the 2-stop condition is calculated as planned:
1) The sum SOC, temperature, and discharge power calculated by S3 (may be calculated from motor rotation speed, torque:
pm=spdm×torqm; spdm is the motor speed; torqm is motor torque + accessory average drain torque) related battery discharge efficiency
2) Different motor speeds obtained by interpolation of motor test results in S4Motor discharge efficiency under motor torque conditions
3) Interpolation is carried out on the transmission test result of S5 to obtain the transmission efficiency of the transmission with different rotational speeds and different torques of 2 gears
4) The transmission is in 2 gears, and when the ambient temperature is T ℃, the system discharge efficiency of the battery SOC is XX percent is as follows:
wherein, system_2 is the system discharge efficiency when the transmission is 2 gear, the ambient temperature is T ℃, and the battery SOC is XX%;the discharge efficiency of the battery is achieved; />The discharge efficiency of the motor is achieved; gecarbox_2 is the transmission efficiency of gear 2.
S8, calculating an optimal efficiency curve; and (3) according to the system efficiency under various conditions calculated in the step (S7), solving the boundary of the system efficiency of different gears in a handover way, and taking the boundary as an optimal efficiency curve, namely a target gear efficiency curve.
And S230, determining target power driving parameters according to the target gear efficiency curve and the gear attribute information.
The target power driving parameter may be a parameter related to the target vehicle determined from the viewpoint of power and drivability. Specifically, the target power driving parameter includes a target power parameter and a target driving parameter. The target power parameter may be a relevant parameter of the target vehicle determined from a power perspective. The target driving parameter may be a relevant parameter of the target vehicle determined from the viewpoint of drivability. Specifically, when determining the target power driving parameter, an angular velocity curve of each vehicle gear may be determined based on the target gear efficiency curve; determining gear acceleration time according to the angular velocity curve, and taking the gear acceleration time as a target power parameter; determining at least one gear attribute parameter value according to the gear attribute information; and carrying out weighted calculation on each gear attribute parameter value, and taking the calculation result as a target driving parameter.
For example, when determining the target power driving parameter, four main evaluation indexes including the motor rotation speed distribution range before and after gear shifting, the accelerator pedal and the acceleration correlation calculation of the whole vehicle, the gear holding time and the power utilization rate of the gear can be weighted and calculated;
the correlation of the acceleration of the accelerator pedal and the whole vehicle is calculated by the following steps:
wherein: x is x i The opening degree of the accelerator pedal is the transient working condition; yi is the acceleration of the whole vehicle in the transient state of the working condition.
The method comprises the steps of carrying out classified and summarized statistical calculation on gear retention time of working conditions, analyzing the ratio of power distribution and full-load power of each gear, and obtaining the drivability score of a current gear shift line in a combined table look-up mode; by determining the target power parameter and the target driving parameter, the gear line of the target vehicle can be conveniently adjusted from the angles of power performance and drivability, and the economical efficiency of the gear line is improved, and meanwhile, the drivability and the power performance are considered.
Further, when determining the target power parameter, the acceleration time of the current gear shifting rule can be determined; and calculating the acceleration distribution of each gear under the full load condition based on the target gear efficiency curve, integrating the acceleration maximum curve to obtain target acceleration time, and taking the target acceleration time as a target power parameter.
S240, determining a target lifting gear line according to the corresponding relation between the target gear efficiency curve and the lifting gear of the target vehicle.
The corresponding relation of the lifting gear is the corresponding relation of the rotating speed and the vehicle speed during the lifting gear. The target upshift line may be a curve that maximizes the target vehicle upshift efficiency as determined from an economical point of view. Specifically, according to the corresponding relation of the lifting gear, the abscissa parameter and the ordinate parameter corresponding to the target gear efficiency curve can be converted to obtain the target lifting gear line.
S250, determining a target lifting gear section according to the curve bending degree of the target lifting gear line.
The target lifting gear interval can be an interval with an adjustable gear line. Specifically, the target upshift and downshift interval may be determined based on the curve angle of the target upshift and downshift line. For example, when the curve angle of the target lift range is large, the target lift range corresponding to the curve is also large. When the curve angle of the target upshift curve is smaller, the corresponding target upshift interval is smaller.
And S260, adjusting the vehicle gear shifting curve based on the target gear lifting interval and the target power driving parameter to obtain a target gear shifting curve.
The target shift curve may be, among other things, a gear line of the target vehicle that is ultimately determined. Specifically, the vehicle shift curve may be adjusted within the target upshift/downshift interval based on the target power driving parameter, thereby obtaining the target shift curve. Specifically, a vehicle gear shifting curve can be adjusted based on a target gear lifting interval and a target power parameter to obtain a preliminary gear shifting curve; and adjusting the preliminary gear shifting curve based on the target gear lifting interval and the target driving parameter to obtain a target gear shifting curve.
Corresponding parameter thresholds can be preset from the angles of dynamics and drivability respectively, and a reference dynamic parameter threshold and a reference driving parameter threshold are obtained. When the value of the target power parameter is smaller than the reference power parameter threshold value, the vehicle shift curve can be adjusted in the target lifting gear interval based on the target power parameter, and a preliminarily adjusted shift line, namely a preliminary shift curve, is obtained.
Furthermore, the value of the target driving parameter and the reference driving parameter threshold value can be compared, and the preliminary shift curve can be adjusted in the target upshift/downshift interval based on the target driving parameter under the condition that the value of the target driving parameter is smaller than the reference driving parameter threshold value, so as to obtain the target shift curve.
Here, since the curve adjustment range is large when the vehicle shift curve is adjusted based on the target power parameter, and the adjustment range is small when the preliminary shift curve is adjusted based on the target driving parameter, the final target shift curve also satisfies the above-described power performance determination condition with a high probability.
Optionally, in order to ensure that the target gear-shifting curve can simultaneously take good dynamic performance and drivability into consideration, after the target gear-shifting curve is obtained, the dynamic parameter and the driving parameter corresponding to the target gear-shifting curve are calculated, the calculated dynamic parameter and the value parameter are respectively compared with corresponding judging conditions, the verification of the dynamic performance and the drivability of the target gear-shifting curve is completed, and the final determination of the target gear-shifting curve is ensured to have good drivability and dynamic performance.
Fig. 5 is a flowchart illustrating a vehicle gear adjustment according to an embodiment of the present invention.
As shown in fig. 5, the workflow of the vehicle gear adjustment includes the steps of:
s1, starting;
s2, building a whole vehicle model;
s3, calculating the charge and discharge efficiency of the battery;
s4, calculating motor efficiency distribution;
s5, calculating transmission efficiency distribution;
s5, calculating transmission efficiency distribution;
s6, calculating accessory power distribution;
s7, calculating the efficiency of different gear systems;
s8, calculating an optimal efficiency curve;
s9, calculating an economical optimal upshift line;
s10, calculating economic boundary limiting conditions of the lifting gear line;
s11, calculating the acceleration time of the current gear shifting rule;
s13, judging whether the dynamic index meets the requirement condition; if yes, executing S14; if not, executing S12;
s12, dynamically correcting the current gear shift line;
s14, calculating the driving performance of the current gear shifting rule;
s16, judging whether the drivability index meets the requirement condition; if yes, executing S17; if not, executing S15;
s15, correcting the current gear shift line based on drivability;
s17, confirming economical efficiency and dynamic performance of the shift line after drivability correction;
s18, outputting an optimized gear shift line;
according to the technical scheme provided by the embodiment of the invention, at least one preset vehicle efficiency curve of the target vehicle is obtained; determining a gear efficiency curve of each vehicle gear according to a preset vehicle efficiency curve, and determining a target gear efficiency curve according to the gear efficiency curve; determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; determining a target lifting gear line according to the corresponding relation between the target gear efficiency curve and the lifting gear of the target vehicle; determining a target lifting gear section according to the curve bending degree of the target lifting gear line; and adjusting the vehicle gear shifting curve based on the target gear lifting interval and the target power driving parameter to obtain a target gear shifting curve. The technical scheme of the embodiment of the invention solves the problem that the lifting gear of the electric automobile cannot be adjusted in the prior art, can adjust the gear shifting curve of the lifting gear of the automobile from the angles of economy, dynamic property and drivability, and can realize the effect of saving energy consumption on the premise of ensuring that the dynamic property and drivability meet the requirements of the whole automobile.
Fig. 6 is a schematic structural diagram of a vehicle gear adjusting device according to an embodiment of the present invention, where the embodiment of the present invention is applicable to a scenario in which a shift line of a vehicle is adjusted, and the device may be implemented in a software and/or hardware manner, and integrated into a computer device having an application development function.
As shown in fig. 6, the vehicle gear position adjusting device includes: a gear efficiency curve determination module 310, a power driving parameter determination module 320, and a target shift curve determination module 330.
The gear efficiency curve determining module 310 is configured to obtain vehicle efficiency information of a target vehicle, and determine a target gear efficiency curve according to the vehicle efficiency information; the power driving parameter determining module 320 is configured to determine a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter; the target gear shift curve determining module 330 is configured to adjust a vehicle shift curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter, so as to obtain a target gear shift curve.
According to the technical scheme provided by the embodiment of the invention, the vehicle efficiency information of the target vehicle is obtained, and the target gear efficiency curve is determined according to the vehicle efficiency information; determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter; and adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve. The technical scheme of the embodiment of the invention solves the problem that the lifting gear of the electric automobile cannot be adjusted in the prior art, can adjust the gear shifting curve of the lifting gear of the automobile from the angles of economy, dynamic property and drivability, and can realize the effect of saving energy consumption on the premise of ensuring that the dynamic property and drivability meet the requirements of the whole automobile.
In an alternative embodiment, the gear efficiency curve determination module 310 is specifically configured to: acquiring at least one preset vehicle efficiency curve of the target vehicle; and determining a gear efficiency curve of each vehicle gear according to the preset vehicle efficiency curve, and determining the target gear efficiency curve according to the gear efficiency curve.
In an alternative embodiment, the gear efficiency curve determination module 310 includes: a vehicle efficiency curve analysis unit for: mapping each gear efficiency curve in a preset space coordinate system to obtain a gear space coordinate plane; wherein, the horizontal axis of the preset space coordinate system is motor torque, the vertical axis is motor rotation speed, and the vertical axis is battery charge state; and determining a coordinate plane boundary line based on the boundary line of each gear space coordinate plane, and taking the coordinate plane boundary line as the target gear efficiency curve.
In an alternative embodiment, the target shift curve determination module 330 is specifically configured to: determining a target lifting gear line according to the corresponding relation between the target gear efficiency curve and the lifting gear of the target vehicle; the corresponding relation of the lifting gear is the corresponding relation of the rotating speed and the vehicle speed during the lifting gear; determining a target lifting gear section according to the curve bending degree of the target lifting gear line; and adjusting the vehicle gear shifting curve based on the target gear lifting interval and the target power driving parameter to obtain the target gear shifting curve.
In an alternative embodiment, the target shift curve determination module 330 includes: a gear shift curve adjustment module for: based on the target lifting gear interval and the target power parameter, adjusting the vehicle gear shifting curve to obtain a preliminary gear shifting curve; and adjusting the preliminary gear shifting curve based on the target gear lifting interval and the target driving parameter to obtain the target gear shifting curve.
In an alternative embodiment, the power driving parameter determination module 320 includes: a power driving parameter determination unit for: determining an angular velocity profile for each vehicle gear based on the target gear efficiency profile; determining gear acceleration time according to the angular velocity curve, and taking the gear acceleration time as the target power parameter; determining at least one gear attribute parameter value according to the gear attribute information; and carrying out weighted calculation on each gear attribute parameter value, and taking a calculation result as the target driving parameter.
In an alternative embodiment, the preset vehicle efficiency profile includes: at least one of an electricity consumption efficiency curve, a battery charge-discharge efficiency curve, a motor efficiency curve, a gearbox efficiency curve, and an accessory efficiency curve.
The vehicle gear adjusting device provided by the embodiment of the invention can execute the vehicle gear adjusting method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the executing method.
Fig. 7 is a schematic structural diagram of a computer device according to an embodiment of the present invention. Fig. 7 illustrates a block diagram of an exemplary computer device 12 suitable for use in implementing embodiments of the present invention. The computer device 12 shown in fig. 7 is only an example and should not impose any limitations on the functionality and use of the embodiments of the present invention. The computer device 12 may be any terminal device having computing power and may be configured in a vehicle gear adjustment device.
As shown in fig. 7, the computer device 12 is in the form of a general purpose computing device. Components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.
Bus 18 may be one or more of several types of bus structures including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include Industry Standard Architecture (ISA) bus, micro channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Computer device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 30 and/or cache memory 32. The computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 7, commonly referred to as a "hard disk drive"). Although not shown in fig. 7, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. The system memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods of the embodiments described herein.
The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and/or any devices (e.g., network card, modem, etc.) that enable the computer device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. Moreover, computer device 12 may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet, through network adapter 20. As shown in fig. 7, the network adapter 20 communicates with other modules of the computer device 12 via the bus 18. It should be appreciated that although not shown in fig. 7, other hardware and/or software modules may be used in connection with computer device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, implementing the vehicle gear adjustment method provided by the present embodiment, the method includes:
acquiring vehicle efficiency information of a target vehicle, and determining a target gear efficiency curve according to the vehicle efficiency information;
determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter;
and adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve.
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the vehicle gear adjustment method as provided by any embodiment of the present invention, including:
acquiring vehicle efficiency information of a target vehicle, and determining a target gear efficiency curve according to the vehicle efficiency information;
determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter;
and adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve.
The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
It will be appreciated by those of ordinary skill in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be centralized on a single computing device, or distributed over a network of computing devices, or they may alternatively be implemented in program code executable by a computer device, such that they are stored in a memory device and executed by the computing device, or they may be separately fabricated as individual integrated circuit modules, or multiple modules or steps within them may be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the invention, the scope of which is defined by the appended claims.
Claims (10)
1. A vehicle gear adjustment method, characterized by comprising:
acquiring vehicle efficiency information of a target vehicle, and determining a target gear efficiency curve according to the vehicle efficiency information;
determining a target power driving parameter according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter;
and adjusting a vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve.
2. The method of claim 1, wherein the obtaining vehicle efficiency information of the target vehicle and determining a target gear efficiency curve from the vehicle efficiency information comprises:
acquiring at least one preset vehicle efficiency curve of the target vehicle;
and determining a gear efficiency curve of each vehicle gear according to the preset vehicle efficiency curve, and determining the target gear efficiency curve according to the gear efficiency curve.
3. The method of claim 2, wherein said determining said target gear efficiency curve from said gear efficiency curve comprises:
mapping each gear efficiency curve in a preset space coordinate system to obtain a gear space coordinate plane; wherein, the horizontal axis of the preset space coordinate system is motor torque, the vertical axis is motor rotation speed, and the vertical axis is battery charge state;
and determining a coordinate plane boundary line based on the boundary line of each gear space coordinate plane, and taking the coordinate plane boundary line as the target gear efficiency curve.
4. The method of claim 2, wherein adjusting a vehicle shift profile of the target vehicle based on the target gear efficiency profile and a target power steering parameter to obtain the target shift profile comprises:
determining a target lifting gear line according to the corresponding relation between the target gear efficiency curve and the lifting gear of the target vehicle; the corresponding relation of the lifting gear is the corresponding relation of the rotating speed and the vehicle speed during the lifting gear;
determining a target lifting gear section according to the curve bending degree of the target lifting gear line;
and adjusting the vehicle gear shifting curve based on the target gear lifting interval and the target power driving parameter to obtain the target gear shifting curve.
5. The method of claim 4, wherein adjusting the vehicle shift profile based on the target upshift and downshift intervals and the target power steering parameter results in the target shift profile, comprising:
based on the target lifting gear interval and the target power parameter, adjusting the vehicle gear shifting curve to obtain a preliminary gear shifting curve;
and adjusting the preliminary gear shifting curve based on the target gear lifting interval and the target driving parameter to obtain the target gear shifting curve.
6. The method of claim 1, wherein determining a target power driving parameter based on the target gear efficiency curve and gear attribute information comprises:
determining an angular velocity profile for each vehicle gear based on the target gear efficiency profile;
determining gear acceleration time according to the angular velocity curve, and taking the gear acceleration time as the target power parameter;
determining at least one gear attribute parameter value according to the gear attribute information;
and carrying out weighted calculation on each gear attribute parameter value, and taking a calculation result as the target driving parameter.
7. The method of claim 2, wherein the preset vehicle efficiency profile comprises: at least one of an electricity consumption efficiency curve, a battery charge-discharge efficiency curve, a motor efficiency curve, a gearbox efficiency curve, and an accessory efficiency curve.
8. A vehicle gear position adjustment device, characterized in that the device comprises:
the gear efficiency curve determining module is used for acquiring vehicle efficiency information of a target vehicle and determining a target gear efficiency curve according to the vehicle efficiency information;
the power driving parameter determining module is used for determining target power driving parameters according to the target gear efficiency curve and the gear attribute information; wherein the target power driving parameters include: a target power parameter and a target driving parameter;
and the target gear shifting curve determining module is used for adjusting the vehicle gear shifting curve of the target vehicle based on the target gear efficiency curve and the target power driving parameter to obtain a target gear shifting curve.
9. A computer device, the computer device comprising:
one or more processors;
a memory for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the vehicle gear adjustment method of any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the vehicle gear adjustment method according to any one of claims 1-7.
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