CN114483944B - Gear shifting point updating method and device, controller and storage medium - Google Patents
Gear shifting point updating method and device, controller and storage medium Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- 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
- B60W30/18—Propelling the vehicle
- B60W30/19—Improvement of gear change, e.g. by synchronisation or smoothing gear shift
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- 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/28—Wheel speed
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- 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/30—Wheel torque
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The application provides a gear shifting point updating method, a gear shifting point updating device, a controller and a storage medium, and relates to the field of electric vehicles. The method comprises the following steps: acquiring a group of wheel end data in each driving cycle, and according to the group of wheel end data, obtaining a plurality of simulated gear shifting points and a plurality of groups of wheel end data corresponding to the simulated gear shifting points by adjusting the actual gear shifting points of each gear in the vehicle speed adjusting intervals of the gears of the gearbox; calculating the consumed electric energy corresponding to each group of wheel end data according to each group of wheel end data; determining a group of wheel end data and a group of wheel end data with the minimum power consumption in the plurality of groups of wheel end data as target group wheel end data; determining a gear shifting point in the target group wheel end data as an ideal gear shifting point of each gear; and updating the actual gear shifting point of each gear according to the ideal gear shifting point of each gear to obtain the updated gear shifting point of each gear. The shifting point updating method can reduce the electric quantity consumption of the electric vehicle and improve the endurance mileage.
Description
Technical Field
The application relates to the field of electric vehicles, in particular to a gear shift point updating method, a gear shift point updating device, a controller and a storage medium.
Background
The electric vehicle is a vehicle adopting a single storage battery as an energy storage power source, the storage battery provides electric energy for the motor, the driving motor operates, the output torque of the motor can be increased through the gearbox, and then the rotating speed of the wheel end is improved, and the electric vehicle is pushed to run.
The gear-shifting conversion of the electric vehicle is characterized in that in the traditional scheme, the electric vehicle mainly automatically switches gears with the vehicle speed and an accelerator pedal, and whether the consumption of electric energy is economical or not is not considered, so that the electric vehicle cannot reach the maximum endurance mileage, namely the endurance mileage is short, and the economy of the electric vehicle is low.
Disclosure of Invention
The invention aims to provide a method, a device, a controller and a storage medium for updating a shift point, aiming at the defects of the prior art, so as to solve the problem that the economy of the whole electric vehicle is low when the electric vehicle automatically carries out gear shift conversion in the prior art.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a shift point updating method, including:
obtaining a set of wheel end data in each driving cycle, the set of wheel end data comprising: obtaining a plurality of simulated gear shifting points and a plurality of sets of wheel end data corresponding to the simulated gear shifting points by adjusting the actual gear shifting point of each gear within the vehicle speed adjusting interval of the plurality of gear shifting points according to the set of wheel end data;
calculating the consumed electric energy corresponding to each group of wheel end data according to each group of wheel end data;
determining a set of wheel end data with the minimum power consumption in the set of wheel end data and the plurality of sets of wheel end data as target set wheel end data;
determining a shift point in the target group wheel end data as an ideal shift point for each gear;
and updating the actual gear shifting point of each gear according to the ideal gear shifting point of each gear to obtain the updated gear shifting point of each gear.
Optionally, the obtaining a set of wheel end data in each driving cycle, the set of wheel end data comprising: a plurality of gearbox gears, a plurality of wheel end speed of a motor vehicle, a plurality of wheel end moment of torsion, a plurality of motor system efficiency, a plurality of gear gearbox system efficiency include:
acquiring a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of the group of wheel end data in each driving cycle at preset sampling time intervals;
calculating to obtain a plurality of motor output data corresponding to the group of wheel end data according to a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of the group of wheel end data;
according to the plurality of motor output data corresponding to the group of wheel end data, inquiring a preset first mapping table of the motor output data and the motor system efficiency to obtain a plurality of motor system efficiencies of the group of wheel end data;
and inquiring a second mapping table of the wheel end vehicle speed, the wheel end torque and the gear transmission system efficiency of preset wheel end data according to the wheel end vehicle speeds and the wheel end torques of the set of wheel end data to obtain the gear transmission system efficiencies of the set of wheel end data.
Optionally, the calculating, according to each set of wheel end data, the consumed electric energy corresponding to each set of wheel end data includes:
and calculating the consumed electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor system efficiencies, a plurality of gear transmission system efficiencies and the sampling time interval of each group of wheel end data.
Optionally, the plurality of motor system efficiencies for each set of wheel end data includes: generating efficiency of a plurality of motors of each group of wheel end data, and power consumption efficiency of a plurality of motors of each group of wheel end data;
according to a plurality of wheel end speed of a motor vehicle, a plurality of wheel end moment of torsion, a plurality of motor system efficiency, a plurality of gear gearbox system efficiency of every group wheel end data, and sampling time interval, calculate the consumption electric energy that every group wheel end data correspond, include:
calculating the power generation electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power generation efficiencies, a plurality of gear transmission system efficiencies and the sampling time interval of each group of wheel end data;
calculating power consumption electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power consumption efficiencies, a plurality of gear transmission system efficiencies and the sampling time interval of each group of wheel end data;
and obtaining the consumed electric energy corresponding to each group of wheel end data according to the generated electric energy and the consumed electric energy.
Optionally, before determining, as the target set of wheel end data, the set of wheel end data and the set of wheel end data that consumes the least power among the plurality of sets of wheel end data, the method further includes:
comparing the consumed electric energy corresponding to the group of wheel end data and the plurality of groups of wheel end data to obtain a group of wheel end data with the minimum consumed electric energy.
Optionally, before determining, as the target set of wheel end data, the set of wheel end data and the set of wheel end data that consumes the least power among the plurality of sets of wheel end data, the method further includes:
and comparing the consumed electric energy corresponding to the multiple groups of wheel end data one by one along a preset change direction of the simulated gear shift point by taking the consumed electric energy corresponding to the group of wheel end data as a reference, and determining the group of wheel end data with the minimum consumed electric energy from the wheel end data before and after the comparison result is turned.
Optionally, deleting other group of wheel end data in the plurality of groups of wheel end data except the target group of wheel end data.
In a second aspect, an embodiment of the present application provides a shift point updating apparatus, including:
an acquisition module configured to acquire a set of wheel-end data in each driving cycle, the set of wheel-end data including: the system comprises a plurality of transmission gears, a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor system efficiencies and a plurality of gear transmission system efficiencies; according to the group of wheel end data, a plurality of simulated gear shifting points and a plurality of groups of wheel end data corresponding to the plurality of simulated gear shifting points are obtained by adjusting the actual gear shifting point of each gear in the vehicle speed adjusting range of the plurality of gearbox gears;
the calculating module is used for calculating the consumed electric energy corresponding to each group of wheel end data according to each group of wheel end data, the motor system efficiency of each group of wheel end data and the gear gearbox system efficiency of each group of wheel end data;
the first determining module is used for determining the group of wheel end data and the group of wheel end data with the minimum electric energy consumption in the plurality of groups of wheel end data as target group wheel end data;
a second determining module, configured to determine a shift point in the target group wheel end data as an ideal shift point of each gear;
and the updating module is used for updating the actual gear shifting point of each gear according to the ideal gear shifting point of each gear to obtain the updated gear shifting point of each gear.
In a third aspect, an embodiment of the present application provides an electric vehicle controller, including: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, when the electric vehicle controller is running, the processor and the storage medium communicate with each other through the bus, and the processor executes the machine-readable instructions to perform the steps of the shift point updating method according to any one of the first aspect.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the shift point updating method according to any one of the first aspect.
Compared with the prior art, the method has the following beneficial effects:
the shift point updating method provided by the embodiment of the application obtains a group of wheel end data in each driving cycle, wherein the group of wheel end data comprises the following steps: the method comprises the steps that multiple gearbox gears, multiple wheel end vehicle speeds, multiple wheel end torques, multiple motor system efficiencies and multiple gear gearbox system efficiencies are obtained, and multiple sets of wheel end data corresponding to multiple simulated gear shifting points and multiple simulated gear shifting points are obtained by adjusting actual gear shifting points of each gear in a vehicle speed adjusting range of the multiple gearbox gears according to one set of wheel end data; calculating the consumed electric energy corresponding to each group of wheel end data according to each group of wheel end data; determining a group of wheel end data and a group of wheel end data with the minimum power consumption in the plurality of groups of wheel end data as target group wheel end data; determining a gear shifting point in the target group wheel end data as an ideal gear shifting point of each gear; and updating the actual gear shifting point of each gear according to the ideal gear shifting point of each gear to obtain the updated gear shifting point of each gear. This application is through the electric energy that every group wheel end data of comparison corresponds the consumption, the wheel end speed that the minimum a group wheel end data of consumption electric energy corresponds is selected as the ideal point of shifting of every gear, and then the actual point of shifting in every driving cycle to same driving route updates, the actual point of shifting mainly carries out the switching of gear with speed of a motor vehicle and accelerator pedal is automatic, the electric energy of not considering consumption, this application can be on prior art's basis, shift the point through a plurality of simulations, the ideal point of shifting that the selection consumes the minimum electric energy is updated the actual point of shifting, reduce the electric energy consumption of electric motor car, the continuation of the journey mileage of whole car is improved, and then the economic nature of whole car is improved. Meanwhile, the wheel end data of each driving cycle in the same driving path are sequentially collected and analyzed, so that the next driving cycle is controlled by updating the gear shifting point until the actual gear shifting point is the ideal gear shifting point, and at the moment, the driving range of the electric vehicle reaches the highest value in the driving path, and the economy is optimal.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flowchart of a shift point updating method according to an embodiment of the present application;
FIG. 2 is a schematic illustration of a shift boundary provided by an embodiment of the present application;
fig. 3 is a schematic flowchart of a process for acquiring wheel end data according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a process for obtaining power consumption of wheel end data according to an embodiment of the present disclosure;
fig. 5 is a power generation efficiency table of a motor according to an embodiment of the present disclosure;
fig. 6 is a power consumption efficiency table of a motor according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a shift point updating apparatus according to an embodiment of the present application;
fig. 8 is a schematic view of an electric vehicle controller according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
In order to update the gear shifting points and improve the economy of the electric vehicle, the technical scheme of the application provides the gear shifting point updating method. A shift point updating method provided in the embodiment of the present application is explained below with reference to specific examples. Fig. 1 is a schematic flowchart of a shift point updating method according to an embodiment of the present application, and as shown in fig. 1, the shift point updating method includes:
s101, acquiring a group of wheel end data in each driving cycle, and according to the group of wheel end data, obtaining a plurality of simulated gear shifting points and a plurality of groups of wheel end data corresponding to the simulated gear shifting points by adjusting the actual gear shifting points of each gear in the vehicle speed adjusting intervals of the gears of the gearbox.
For the same driving path, recording a group of wheel end data in each driving cycle, and storing the data into a controller of the electric vehicle, wherein the group of wheel end data comprises: a plurality of gearbox gears, a plurality of wheel end speed of a motor vehicle, a plurality of wheel end moment of torsion, a plurality of motor system efficiency, a plurality of gear gearbox system efficiency.
For example, the same driving route may be a daily travel route for the same bus, which may travel multiple driving cycles. Of course, the same driving route is not specifically limited in the embodiment of the present application. After each driving cycle is finished, a set of wheel end data is obtained from a controller of the electric vehicle.
The actual gear shifting point of each gear can be represented as the wheel end vehicle speed when the gear of each gearbox is switched, the positions of a plurality of simulated gear shifting points are obtained by adjusting the positions of the actual gear shifting points of each gear, and then the gear shifting point with the highest economy is selected from the plurality of simulated gear shifting points. Since the positions of the shift points can be represented by the magnitude of the wheel end vehicle speed, the positions of the plurality of simulated shift points can be obtained at preset vehicle speed intervals in the direction of decreasing or increasing the wheel end vehicle speed by taking the position of the actual shift point as a reference, and the positions of the simulated shift points can be preset, which is not limited in the embodiment of the present application.
In a driving cycle, the positions of a plurality of simulated shift points need to be within a shift range adjustment range from a minimum shift boundary of a shift to a maximum shift boundary of the shift, for example, fig. 2 is a schematic diagram of a shift boundary provided in the embodiment of the present application, as shown in fig. 2, a first gear has a first-gear minimum shift boundary and a first-gear maximum shift boundary, and a second gear has a second-gear minimum shift boundary and a second-gear maximum shift boundary. The plurality of simulated shift points obtained by adjusting the actual shift points cannot exceed the gear adjustment interval of each gear. In the embodiment of the present application, the gear adjustment interval is determined by the attribute parameters of each machine in the electric vehicle.
After the plurality of simulated shift points are determined, a plurality of sets of wheel end data of the driving cycle corresponding to the plurality of simulated shift points can be obtained according to the positions of the plurality of simulated shift points, wherein the plurality of sets of wheel end data can be understood as simulated data.
And S102, calculating the consumed electric energy corresponding to each group of wheel end data according to each group of wheel end data.
In the above step S101, a set of wheel end data and a plurality of sets of wheel end data can be obtained, where one set of wheel end data is actual data, and the plurality of sets of wheel end data are analog data.
And calculating the consumed electric energy corresponding to the group of wheel end data and the plurality of groups of wheel end data, namely calculating to obtain the actually consumed electric energy and the consumed electric energy corresponding to the plurality of groups of simulation data. By calculating the consumed electrical energy, a shift point can be selected which consumes less electrical energy than actually consumed, i.e. which is more economical than the actual shift point.
S103, determining a group of wheel end data with the minimum power consumption in the group of wheel end data and the plurality of groups of wheel end data as target group wheel end data.
In order to achieve higher economy of the electric vehicle, in the consumed electric energy of each group of wheel end data obtained in step S102, a group of wheel end data with the smallest consumed electric energy is selected as target group wheel end data, that is, a shift point corresponding to the target group wheel end data is a more economical shift point.
And S104, determining the gear shifting point in the target group wheel end data as an ideal gear shifting point of each gear.
The gear shifting point corresponding to the target group wheel end data is the gear shifting point with the minimum electric energy consumption, so that the gear shifting point can be called an ideal gear shifting point, and further the electric vehicle in the next driving cycle can be controlled correspondingly according to the ideal gear shifting point.
And S105, updating the actual gear shifting point of each gear according to the ideal gear shifting point of each gear to obtain the updated gear shifting point of each gear.
In each driving cycle, the ideal shift point is obtained through the above step S104, the actual shift point of each gear is updated by using a linear weight method, specifically, the same or different weights may be given to the actual shift point and the ideal shift point, the updated shift point is obtained through weighting and calculation, that is, the updated shift point is a more economical shift point, and in the next driving cycle, the updated shift point is used to replace the actual shift point to control the driving of the electric vehicle.
Updating the actual shift point according to the following formula (1) to obtain an updated shift point:
θ N ＝(1-k i )θ r +k i ×θ i formula (1)
Wherein, theta N Representing updated shift points, k, for each gear i Representing the weight coefficient, θ r Representing the actual shift point, theta, of each gear i Representing the ideal shift point for each gear.
After a first driving cycle is carried out in a preset driving path, acquiring a group of wheel end data and executing the method shown in figure 1 to calculate to obtain an updated gear shifting point, adopting the updated gear shifting point to control the electric vehicle to carry out the next driving cycle in the driving path, after the next driving cycle is finished, continuously acquiring a corresponding group of wheel end data and calculating to obtain a corresponding updated gear shifting point, adopting the updated gear shifting point to continuously control the electric vehicle to carry out the next driving cycle in the driving path, and accordingly, the electric energy consumption of the electric vehicle is gradually reduced until an actual gear shifting point in a certain driving cycle is an ideal gear shifting point, the actual gear shifting point does not need to be updated, the actual gear shifting point is the optimal gear shifting point of the driving path, the electric vehicle can achieve the best economy in the driving path through the optimal gear shifting point, and the driving range reaches the highest.
The shift point updating method provided by the embodiment of the application obtains a group of wheel end data in each driving cycle, wherein the group of wheel end data comprises the following steps: the method comprises the steps that multiple gearbox gears, multiple wheel end vehicle speeds, multiple wheel end torques, multiple motor system efficiencies and multiple gear gearbox system efficiencies are obtained, and multiple sets of wheel end data corresponding to multiple simulated gear shifting points and multiple simulated gear shifting points are obtained by adjusting actual gear shifting points of each gear in a vehicle speed adjusting range of the multiple gearbox gears according to one set of wheel end data; calculating the consumed electric energy corresponding to each group of wheel end data according to each group of wheel end data; determining a group of wheel end data and a group of wheel end data with the minimum power consumption in the plurality of groups of wheel end data as target group wheel end data; determining a gear shifting point in the target group wheel end data as an ideal gear shifting point of each gear; and updating the actual gear shifting point of each gear according to the ideal gear shifting point of each gear to obtain the updated gear shifting point of each gear. This application is through the electric energy that every group wheel end data of comparison corresponds the consumption, the wheel end speed that the minimum a group wheel end data of consumption electric energy corresponds is selected as the ideal point of shifting of every gear, and then the actual point of shifting in every driving cycle to same driving route updates, the actual point of shifting mainly carries out the switching of gear with speed of a motor vehicle and accelerator pedal is automatic, the electric energy of not considering consumption, this application can be on prior art's basis, shift the point through a plurality of simulations, the ideal point of shifting that the selection consumes the minimum electric energy is updated the actual point of shifting, reduce the electric energy consumption of electric motor car, the continuation of the journey mileage of whole car is improved, and then the economic nature of whole car is improved. Meanwhile, the wheel end data of each driving cycle in the same driving path are sequentially collected and analyzed, so that the next driving cycle is controlled by updating the gear shifting point until the actual gear shifting point is the ideal gear shifting point, and at the moment, the driving range of the electric vehicle reaches the highest value in the driving path, and the economy is optimal.
On the basis of the shift point updating method shown in fig. 1, an embodiment of the present application further provides an implementation method for acquiring each set of wheel end data in the shift point updating method. This embodiment is explained in detail below with reference to the drawings. Fig. 3 is a schematic flow chart of acquiring wheel end data according to an embodiment of the present disclosure. As shown in fig. 3, the method S101 includes:
s301, acquiring a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of a group of wheel end data in each driving cycle at preset sampling time intervals.
In an actual application scenario, in a driving cycle, a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of wheel end data change in real time, in the embodiment of the application, continuous wheel end data are converted into discrete wheel end data, the plurality of gearbox gears, the plurality of wheel end vehicle speeds and the plurality of wheel end torques of the wheel end data are collected at preset sampling time intervals, that is, assuming that the sizes of the plurality of gearbox gears, the plurality of wheel end vehicle speeds and the plurality of wheel end torques of the wheel end data at the sampling time intervals are unchanged, a plurality of gearbox gears, the plurality of wheel end vehicle speeds and the plurality of wheel end torques of a group of wheel end data in the driving cycle are obtained.
And S302, calculating and obtaining a plurality of motor output data corresponding to a group of wheel end data according to a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of the group of wheel end data.
In a sampling time interval, a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of the wheel end data are unchanged, and a plurality of motor output data corresponding to a group of wheel end data can be obtained through calculation based on the plurality of gearbox gears, the plurality of wheel end vehicle speeds, the plurality of wheel end torques of the wheel end data and the gearbox speed ratio of each gear. The motor output data comprises motor output torque and motor output rotating speed.
Specifically, the motor output torque in the motor output data corresponding to one wheel end torque at each gear in a set of wheel end data is calculated according to the following formula (2):
T r ＝T c ×i g ×η g formula (2)
Wherein, T r Representing wheel end torque, T c Representing motor output torque, i g Representing the speed ratio, eta, of the gearbox g Representing the gearbox mechanical system efficiency. Wherein each gear has a corresponding gearbox speed ratio and gearbox mechanical system efficiency.
Specifically, the output rotation speed of the motor in the motor output data corresponding to the wheel end vehicle speed at each gear in a group of wheel end data is calculated according to the following formula (3):
v r ＝v c /i g x 0.377 x r formula (3)
Wherein v is r Indicating wheel end vehicle speed, v c Indicating motor output speed, i g Representing the gearbox ratio and r the tire radius.
And S303, inquiring a preset first mapping table of the motor output data and the motor system efficiency according to a plurality of motor output data corresponding to a group of wheel end data to obtain a plurality of motor system efficiencies of a group of wheel end data.
The motor output data comprises motor output rotating speed and motor torque, the horizontal and vertical coordinates of the first mapping table are the motor output rotating speed and the motor torque respectively, the area where the corresponding motor system efficiency is located is determined according to the motor output data in the first mapping table, and then the corresponding motor system efficiency is determined.
S304, according to the wheel end vehicle speeds and the wheel end torques of the wheel end data, a preset second mapping table of the wheel end vehicle speeds, the wheel end torques and the gear transmission box system efficiency of the wheel end data is inquired, and the gear transmission box system efficiency of the wheel end data is obtained.
And the horizontal and vertical coordinates of the second mapping table are respectively wheel end vehicle speed and wheel end torque, and the area where the corresponding gear transmission box system efficiency is located is determined according to the values of the wheel end vehicle speed and the wheel end torque in the second mapping table, so that the corresponding gear transmission box system efficiency is determined.
To sum up, this application embodiment gathers a plurality of gearbox gears, a plurality of wheel end speed of a set of wheel end data, a plurality of wheel end moment of torsion with preset sampling time interval, according to a plurality of gearbox gears, a plurality of wheel end speed of a set of wheel end data, a plurality of wheel end moment of torsion, calculate and obtain a plurality of motor output data, and then the inquiry obtains a plurality of motor system efficiency that a plurality of motor output data correspond, simultaneously, according to a plurality of wheel end speed of a set of wheel end data, a plurality of wheel end moment of torsion, can inquire and obtain a plurality of gear gearbox system efficiency that correspond, promptly this application embodiment provides the method can obtain a set of wheel end data.
On the basis of the shift point updating method shown in fig. 1, an embodiment of the present application further provides an implementation method for calculating the consumed electrical energy corresponding to each group of wheel end data in the shift point updating method. As shown in fig. 1, in the method S102, calculating the consumed electric energy corresponding to each set of wheel end data according to each set of wheel end data includes:
and calculating the consumed electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor system efficiencies, a plurality of gear transmission system efficiencies and a sampling time interval of each group of wheel end data.
Specifically, the consumed electric energy corresponding to each set of wheel end data is calculated according to the following formula (4):
wherein W represents the consumed electric energy corresponding to each group of wheel end data, and T r Representing wheel end torque, v r Representing wheel end vehicle speed, r representing tire radius, η m Motor system efficiency, η, representing each set of wheel end data g Representing the efficiency of the gear gearbox system for each set of wheel end data, Δ t representing the sampling time interval, dividing the entire driving cycle into a number of time segments, calculating each timeThe power consumed within a segment is summed and n represents the total number of samples. In order to avoid inaccurate data of consumed electric energy, the sampling interval time is generally set to be small. The interval time may be, for example, 10ms, and the sampling interval time is not particularly limited in the embodiment of the present application.
According to the embodiment of the application, according to a plurality of wheel end vehicle speeds of each group of wheel end data, a plurality of wheel end torques, a plurality of motor system efficiencies, a plurality of gear transmission system efficiencies and sampling time intervals, the consumed electric energy corresponding to each group of wheel end data is obtained through calculation, the consumed electric energy corresponding to each group of wheel end data can be compared through the comparison, a group of wheel end data with the minimum consumed electric energy is selected, and compared with the prior art, the embodiment of the application not only considers more comprehensively, the problem of how much the consumed electric energy is considered, and the group of wheel end data with the minimum consumed electric energy is selected as the target group of wheel end data, so that the endurance of the electric vehicle is improved, and further the economy is improved.
On the basis of the shift point updating method shown in fig. 1, an embodiment of the present application further provides an implementation method for acquiring the power consumption of each group of wheel end data in the shift point updating method. In the above embodiment, the efficiency of the multiple motor systems per set of wheel end data includes: the generator efficiency of a plurality of motors of each set of wheel end data, and the power consumption efficiency of a plurality of motors of each set of wheel end data. The embodiment is explained in detail below with reference to the drawings. Fig. 4 is a schematic flowchart of a process of acquiring power consumption of wheel end data according to an embodiment of the present disclosure. As shown in fig. 4, in the above embodiment, calculating the consumed electric energy corresponding to each set of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor system efficiencies, a plurality of gear transmission system efficiencies, and a sampling time interval of each set of wheel end data includes:
s401, calculating the power generation electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power generation efficiencies, a plurality of gear transmission system efficiencies and a sampling time interval of each group of wheel end data.
The efficiency of the motor system comprises the power generation efficiency and the power consumption efficiency of the motor, namely the first mapping table comprises a power generation efficiency table and a power consumption efficiency table of the motor. The horizontal and vertical coordinates of the motor generating efficiency meter and the motor power consumption efficiency meter are the output rotating speed and the torque of the motor. The power generation and the power consumption of the motor depend on the positive and negative of the torque of the motor, the motor generates power when the torque of the motor is positive, and the motor consumes power when the torque of the motor is negative.
Fig. 5 is a power generation efficiency table of a motor according to an embodiment of the present application, and as shown in fig. 5, the maximum power generation efficiency of the motor is 97%. In the motor power generation efficiency table, a region where the corresponding motor power generation efficiency is located is determined according to the numerical values of the motor output rotation speed and the motor torque, and then the corresponding motor power generation efficiency is determined, for example, if the motor output rotation speed is 3000rpm, and the motor torque is 100Nm, according to fig. 5, it can be obtained that a coordinate point in the two-dimensional coordinate system, where the motor output rotation speed is 3000rpm and the motor torque is 100Nm, is in a region where the motor power generation efficiency is 96%, that is, at this time, the motor power generation efficiency is 96%.
And calculating the power generation electric energy corresponding to each group of wheel end data through a formula (4) according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power generation efficiencies, a plurality of gear transmission system efficiencies and sampling time intervals, wherein the corresponding motor torque in each group of wheel end data is positive wheel end data.
And S402, calculating the power consumption electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power consumption efficiencies, a plurality of gear transmission system efficiencies and a sampling time interval of each group of wheel end data.
For example, fig. 6 is a motor power consumption efficiency table provided in the embodiment of the present application, as shown in fig. 6, a region where the corresponding motor power consumption efficiency is located is determined according to the values of the motor output rotation speed and the motor torque in the motor power consumption efficiency table, and then the corresponding motor power consumption efficiency is determined, for example, if the motor output rotation speed is 3000rpm and the motor torque is-150 Nm, according to fig. 6, it can be obtained that a coordinate point corresponding to the motor output rotation speed of 3000rpm and the motor torque of-150 Nm in a two-dimensional coordinate system is in the region where the motor power consumption efficiency is 96%, that is, the motor power consumption efficiency is 96% at this time.
And calculating the power consumption electric energy corresponding to each group of wheel end data through a formula (4) according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor generating efficiencies, a plurality of gear transmission system efficiencies and sampling time intervals of the wheel end data with the motor torque corresponding to each group of wheel end data being negative.
And S403, obtaining the consumed electric energy corresponding to each group of wheel end data according to the generated electric energy and the consumed electric energy.
In each driving cycle, the electric vehicle inevitably consumes power, and therefore, the consumed power corresponding to each set of wheel end data is consumed power-generated power.
According to the method and the device, the efficiency of a motor system is divided into the motor generating efficiency and the motor power consumption efficiency according to the positive and negative of the motor torque corresponding to each group of wheel end data, and then the generating electric energy and the power consumption electric energy are calculated according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of gear transmission system efficiencies and sampling time intervals of each group of wheel end data, and finally the power consumption electric energy of each group of wheel end data is obtained. The total consumed electric energy is obtained by integrating the electric energy generated by the motor and the electric energy consumed by the motor, and the ideal gear shifting point is obtained by comparing the total consumed electric energy.
On the basis of the shift point updating method shown in fig. 1, an embodiment of the present application further provides an implementation method for determining target group wheel end data in the shift point updating method. Before the method S103, before determining the target group wheel-end data, the method further includes: comparing the consumed electric energy corresponding to the group of wheel end data and the multiple groups of wheel end data to obtain a group of wheel end data with the minimum consumed electric energy, namely target group wheel end data.
Specifically, the consumed electric energy corresponding to one set of wheel end data of the actual shift point is taken as a reference, the consumed electric energy corresponding to other sets of wheel end data is compared one by one along the preset shift point adjusting direction, and the set of wheel end data with the minimum consumed electric energy is determined from the wheel end data before and after the comparison result is turned.
For example, the power consumption corresponding to a set of wheel end data of the actual shift point is W, along the preset shift point adjustment direction, the power consumption corresponding to a set of wheel end data of the simulated shift point 1 is W1, the power consumption corresponding to a set of wheel end data of the simulated shift point 2 is W2, if W1< W and W2> W, the power consumption of W1 is the minimum, that is, the set of wheel end data corresponding to the simulated shift point 1 is the target set of wheel end data, and the simulated shift point 1 is the ideal shift point.
For example, the power consumption corresponding to a set of wheel end data of the actual shift point is W, along the preset shift point adjustment direction, the power consumption corresponding to a set of wheel end data of the simulated shift point 1 is W1, the power consumption corresponding to a set of wheel end data of the simulated shift point 2 is W2, the power consumption corresponding to a set of wheel end data of the simulated shift point 3 is W3, and if W1< W and W2< W1 and W3> W, the power consumption of W2 is the minimum, that is, the set of wheel end data corresponding to the simulated shift point 2 is the target set of wheel end data, and the simulated shift point 2 is the ideal shift point.
Optionally, when the consumed electric energy is compared, the consumed electric energy corresponding to all the shift points may be sequenced, where all the shift points include actual shift points and all simulated shift points, and a group of wheel end data with the smallest consumed electric energy, that is, a first group of wheel end data in ascending order or a last group of wheel end data in descending order, is selected according to the sequencing result, and is determined as the target group of wheel end data, so as to determine the ideal shift point.
In summary, in the embodiment of the present application, a plurality of electric energy consumptions are compared, and from the wheel end data before and after the turn appears in the comparison result, a group of wheel end data with the minimum electric energy consumption is determined as the target group wheel end data, and the ideal shift point corresponding to the target group wheel end data with the minimum electric energy consumption obtained through the comparison is the shift point with higher economy, so that the driving range of the electric vehicle can be improved. Of course, the comparison in the embodiment of the present application may also obtain the target group round end data through other sorting algorithms, which is not limited herein.
On the basis of the above method for updating a shift point shown in fig. 1, the embodiment of the present application further provides another method for updating a shift point. After the method S105, obtaining the updated shift point of each gear, the method further includes: and deleting other group wheel end data except the target group wheel end data in the plurality of groups of wheel end data.
After deleting other group wheel end data, only leaving target group wheel end data, which can be understood as that only storing target group wheel end data corresponding to an ideal gear shifting point in a controller of the electric vehicle, obtaining an updated gear shifting point through the ideal gear shifting point, then obtaining a group of wheel end data corresponding to the updated gear shifting point according to the target group wheel end data corresponding to the ideal gear shifting point, and replacing a group of wheel end data corresponding to an actual gear shifting point with the group of wheel end data corresponding to the updated gear shifting point, so as to update the actual gear shifting point and obtain more economical gear shifting points.
In the embodiment of the application, after a first driving cycle is carried out in a preset driving path, an updated shifting point is obtained through calculation, wheel end data corresponding to other shifting points are deleted, only one group of wheel end data corresponding to an ideal shifting point is stored in a controller of the electric vehicle, and then one group of wheel end data corresponding to the updated shifting point is obtained, when a second driving cycle is carried out on the same driving path, the electric vehicle is controlled to complete the second driving cycle by adopting the one group of wheel end data corresponding to the updated shifting point, compared with the first driving cycle, the driving range and the economy of the electric vehicle are improved, after the second driving cycle is completed, one group of wheel end data in the second driving cycle is obtained from the controller of the electric vehicle, the shifting point is continuously updated, the updated shifting point of the second driving cycle is obtained, and the electric vehicle is controlled to carry out a third driving cycle by adopting the one group of wheel end data corresponding to the updated shifting point of the second driving cycle, accordingly, the driving mileage and the economy of the electric vehicle are gradually improved until an actual shift point in a driving cycle is an ideal shift point, and at the moment, the electric vehicle reaches the best economy in the driving cycle and the driving mileage reaches the highest aiming at the driving path.
The following describes a shift point updating device and an electric vehicle controller for implementing the shift point updating device, and specific implementation processes and technical effects thereof are referred to above, and will not be described again below.
Fig. 7 is a schematic diagram of a shift point updating apparatus according to an embodiment of the present application, and as shown in fig. 7, the shift point updating apparatus includes:
an obtaining module 701, configured to obtain a set of wheel end data in each driving cycle, where the set of wheel end data includes: the gear shifting control system comprises a plurality of gearbox gears, a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor system efficiencies and a plurality of gear gearbox system efficiencies, and according to a set of wheel end data, actual gear shifting points of each gear are adjusted in a vehicle speed adjusting interval of the gearbox gears to obtain a plurality of simulated gear shifting points and a plurality of sets of wheel end data corresponding to the simulated gear shifting points.
And a calculating module 702, configured to calculate, according to each set of wheel end data, a consumed electric energy corresponding to each set of wheel end data.
The first determining module 703 is configured to determine, as the target set of wheel end data, a set of wheel end data that consumes the least power among the set of wheel end data and the multiple sets of wheel end data.
A second determining module 704, configured to determine the shift point in the target group wheel end data as the ideal shift point for each gear.
The updating module 705 is configured to update the actual shift point of each gear according to the ideal shift point of each gear, so as to obtain an updated shift point of each gear.
Optionally, the obtaining module 701 is further specifically configured to obtain, at preset sampling time intervals, a plurality of transmission gears, a plurality of wheel end vehicle speeds, and a plurality of wheel end torques of a set of wheel end data in each driving cycle; calculating to obtain a plurality of motor output data corresponding to a group of wheel end data according to a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of the group of wheel end data; according to a plurality of motor output data corresponding to a group of wheel end data, inquiring a preset first mapping table of the motor output data and the motor system efficiency to obtain a plurality of motor system efficiencies of the group of wheel end data; and inquiring a second mapping table of the wheel end vehicle speed, the wheel end torque and the gear transmission system efficiency of the preset wheel end data according to the wheel end vehicle speeds and the wheel end torques of the set of wheel end data to obtain the gear transmission system efficiencies of the set of wheel end data.
Optionally, the calculating module 702 is further specifically configured to calculate the consumed electric energy corresponding to each set of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor system efficiencies, a plurality of gear transmission system efficiencies, and a sampling time interval of each set of wheel end data.
Optionally, the calculating module 702 is specifically further configured to calculate a plurality of motor system efficiencies for each set of wheel end data, including: generating efficiency of a plurality of motors of each group of wheel end data, and power consumption efficiency of a plurality of motors of each group of wheel end data; calculating the power generation electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power generation efficiencies, a plurality of gear transmission system efficiencies and a sampling time interval of each group of wheel end data; calculating power consumption electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power consumption efficiencies, a plurality of gear transmission system efficiencies and a sampling time interval of each group of wheel end data; and obtaining the consumed electric energy corresponding to each group of wheel end data according to the generated electric energy and the consumed electric energy.
Optionally, the first determining module 703 is further specifically configured to compare a set of wheel end data with the consumed electric energy corresponding to multiple sets of wheel end data, so as to obtain a set of wheel end data with the minimum consumed electric energy.
Optionally, the first determining module 703 is further specifically configured to compare the consumed electric energy corresponding to the multiple sets of wheel end data one by one along a preset simulated shift point change direction with the consumed electric energy corresponding to the one set of wheel end data as a reference, and determine a set of wheel end data with the minimum consumed electric energy from the wheel end data before and after the turn occurs in the comparison result.
A deleting module 706, configured to delete other group of round end data in the multiple groups of round end data except the target group of round end data.
These above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Fig. 8 is a schematic diagram of an electric vehicle controller according to an embodiment of the present disclosure, where the electric vehicle controller may be a computing device with a computing processing function.
This electric vehicle controller includes: a processor 801, a storage medium 802, a bus 803. The processor 801 and the storage medium 802 are connected by a bus 803.
The storage medium 802 is used for storing a program, and the processor 801 calls the program stored in the storage medium 802 to execute the above-described method embodiments. The specific implementation and technical effects are similar, and are not described herein again.
Optionally, the invention also provides a program product, for example a computer-readable storage medium, comprising a program which, when being executed by a processor, is adapted to carry out the above-mentioned method embodiments.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or in the form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
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 conceive 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 (10)
1. A shift point updating method characterized by comprising:
obtaining a set of wheel end data in each driving cycle, the set of wheel end data comprising: obtaining a plurality of simulated gear shifting points and a plurality of sets of wheel end data corresponding to the simulated gear shifting points by adjusting the actual gear shifting point of each gear within the vehicle speed adjusting interval of the plurality of gear shifting points according to the set of wheel end data;
calculating the consumed electric energy corresponding to each group of wheel end data according to each group of wheel end data;
determining a set of wheel end data with the minimum power consumption in the set of wheel end data and the plurality of sets of wheel end data as target set wheel end data;
determining a shift point in the target group wheel end data as an ideal shift point for each gear;
updating the actual gear shifting point of each gear according to the ideal gear shifting point of each gear to obtain an updated gear shifting point of each gear;
wherein, a plurality of simulated shift points are obtained by adjusting the actual shift point of each gear, including: and adjusting the actual gear shifting points in the direction of reducing or increasing the speed of the wheel end at preset speed intervals by taking the positions of the actual gear shifting points as a reference to obtain a plurality of simulated gear shifting points.
2. The method of claim 1, wherein the obtaining a set of wheel end data in each driving cycle comprises: a plurality of gearbox gears, a plurality of wheel end speed of a motor vehicle, a plurality of wheel end moment of torsion, a plurality of motor system efficiency, a plurality of gear gearbox system efficiency include:
acquiring a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of the group of wheel end data in each driving cycle at preset sampling time intervals;
calculating to obtain a plurality of motor output data corresponding to the group of wheel end data according to a plurality of gearbox gears, a plurality of wheel end vehicle speeds and a plurality of wheel end torques of the group of wheel end data;
according to the plurality of motor output data corresponding to the group of wheel end data, inquiring a preset first mapping table of the motor output data and the motor system efficiency to obtain a plurality of motor system efficiencies of the group of wheel end data;
and inquiring a second mapping table of the wheel end vehicle speed, the wheel end torque and the gear transmission system efficiency of preset wheel end data according to the wheel end vehicle speeds and the wheel end torques of the set of wheel end data to obtain the gear transmission system efficiencies of the set of wheel end data.
3. The method according to claim 2, wherein the calculating the consumed electric energy corresponding to each set of wheel end data according to each set of wheel end data comprises:
and calculating the consumed electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor system efficiencies, a plurality of gear transmission system efficiencies and the sampling time interval of each group of wheel end data.
4. The method of claim 3, wherein the plurality of motor system efficiencies for each set of wheel end data comprises: generating efficiency of a plurality of motors of each group of wheel end data, and power consumption efficiency of a plurality of motors of each group of wheel end data;
according to a plurality of wheel end speed of a motor vehicle, a plurality of wheel end moment of torsion, a plurality of motor system efficiency, a plurality of gear gearbox system efficiency of every group wheel end data, and sampling time interval, calculate the consumption electric energy that every group wheel end data correspond, include:
calculating the power generation electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power generation efficiencies, a plurality of gear transmission system efficiencies and the sampling time interval of each group of wheel end data;
calculating power consumption electric energy corresponding to each group of wheel end data according to a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor power consumption efficiencies, a plurality of gear transmission system efficiencies and the sampling time interval of each group of wheel end data;
and obtaining the consumed electric energy corresponding to each group of wheel end data according to the generated electric energy and the consumed electric energy.
5. The method of claim 1, wherein before determining the set of wheel end data and the set of wheel end data that consumes the least power among the plurality of sets of wheel end data as the target set of wheel end data, the method further comprises:
comparing the consumed electric energy corresponding to the group of wheel end data and the plurality of groups of wheel end data to obtain a group of wheel end data with the minimum consumed electric energy.
6. The method of claim 1, wherein before determining the set of wheel end data and the set of wheel end data that consumes the least power among the plurality of sets of wheel end data as the target set of wheel end data, the method further comprises:
and comparing the consumed electric energy corresponding to the multiple groups of wheel end data one by one along a preset change direction of the simulated gear shift point by taking the consumed electric energy corresponding to the group of wheel end data as a reference, and determining the group of wheel end data with the minimum consumed electric energy from the wheel end data before and after the comparison result is turned.
7. The method according to any one of claims 1-6, further comprising:
deleting other group wheel end data except the target group wheel end data in the multiple groups of wheel end data.
8. A shift point updating device characterized by comprising:
an obtaining module, configured to obtain a set of wheel end data in each driving cycle, where the set of wheel end data includes: the system comprises a plurality of transmission gears, a plurality of wheel end vehicle speeds, a plurality of wheel end torques, a plurality of motor system efficiencies and a plurality of gear transmission system efficiencies; according to the group of wheel end data, a plurality of simulated gear shifting points and a plurality of groups of wheel end data corresponding to the plurality of simulated gear shifting points are obtained by adjusting the actual gear shifting point of each gear in the vehicle speed adjusting range of the plurality of gearbox gears;
the calculation module is used for calculating the consumed electric energy corresponding to each group of wheel end data according to each group of wheel end data;
the first determining module is used for determining the group of wheel end data and the group of wheel end data with the minimum electric energy consumption in the plurality of groups of wheel end data as target group wheel end data;
a second determining module, configured to determine a shift point in the target group wheel end data as an ideal shift point of each gear;
the updating module is used for updating the actual gear shifting point of each gear according to the ideal gear shifting point of each gear to obtain an updated gear shifting point of each gear;
the obtaining module is specifically configured to adjust the wheel end speed in a direction of decreasing or increasing with a preset speed interval based on the position of the actual shift point to obtain a plurality of simulated shift points.
9. An electric vehicle controller, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the electric vehicle controller is operating, the processor executing the machine-readable instructions to perform the steps of the shift point updating method according to any one of claims 1-7.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, performs the steps of the shift point updating method according to any one of claims 1-7.
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