CN113685537B - Gear shifting method and device of electric automobile, electronic equipment and storage medium - Google Patents
Gear shifting method and device of electric automobile, electronic equipment and storage medium Download PDFInfo
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- CN113685537B CN113685537B CN202110922000.7A CN202110922000A CN113685537B CN 113685537 B CN113685537 B CN 113685537B CN 202110922000 A CN202110922000 A CN 202110922000A CN 113685537 B CN113685537 B CN 113685537B
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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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- 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
Abstract
The application provides a gear shifting method, a gear shifting device, electronic equipment and a storage medium of an electric automobile, which relate to the technical field of vehicles, and the method comprises the following steps: continuously predicting whether the vehicle enters a braking state within a set time period after the current time under the condition that the current vehicle speed is greater than the preset vehicle speed; if the vehicle is predicted to enter the braking state within the set time period, the gear shifting strategy of the vehicle is changed from the preset gear shifting strategy corresponding to the current moment into the corresponding delayed gear shifting strategy, and the vehicle operates according to the delayed gear shifting strategy, wherein under the same driving gear and the same accelerator state, the first gear shifting speed of the delayed gear shifting strategy is larger than the second gear shifting speed of the preset gear shifting strategy, namely the delayed gear shifting mode is entered, so that the motor is in a constant power area when the vehicle enters the braking state, the recovery of braking energy is increased, and the economy is improved.
Description
Technical Field
The present application relates to the field of vehicle technologies, and in particular, to a gear shifting method and apparatus for an electric vehicle, an electronic device, and a storage medium.
Background
With the continuous development of new energy technology, electric vehicles are widely used. For electric vehicles, a gear shifting strategy is very important, and some electric vehicles can shift gears by driving a gearbox through a motor, for example, a power assembly system shown in fig. 1, wherein a power battery system of the electric vehicle is connected with a driving motor, and the driving motor is connected with the gearbox. The electric automobile has the characteristics of high speed of the motor and less gear shifting of the gearbox, so that the influence of a gear shifting strategy on the recovery of braking energy is particularly obvious, and the recovery of the braking energy is the most important factor influencing the economical efficiency.
At present, the gear shifting strategy of the electric automobile is that when the speed of the automobile is higher than a certain speed of the automobile, the automobile is shifted up, when the gear is shifted up, the working point of the motor is changed from a constant power area to a constant torque area, and if the automobile enters a braking state soon after gear shifting, the motor works in the constant torque area most of the time when braking energy is recovered, so that the braking energy recovery is reduced, and the economy is reduced.
Disclosure of Invention
The embodiment of the application provides a gear shifting method and device of an electric automobile, electronic equipment and a storage medium, which are used for increasing the recovery of braking energy and improving the economy.
In a first aspect, an embodiment of the present application provides a gear shifting method for an electric vehicle, including:
continuously predicting whether the vehicle enters a braking state within a set time period after the current time under the condition that the current vehicle speed is greater than the preset vehicle speed;
if the vehicle is predicted to enter the braking state within the set time period, changing the gear shifting strategy of the vehicle from the preset gear shifting strategy corresponding to the current moment into a corresponding delayed gear shifting strategy, and operating according to the delayed gear shifting strategy; and under the same driving gear and the same accelerator state, the first gear shifting speed of the delayed gear shifting strategy is greater than the second gear shifting speed of the preset gear shifting strategy.
In one possible embodiment, the method further comprises:
and when the current vehicle speed is less than the preset vehicle speed, operating according to a preset gear shifting strategy corresponding to the current moment.
In a possible embodiment, the method further comprises:
and under the condition that the current vehicle speed is greater than the preset vehicle speed, if the fact that the vehicle does not enter a braking state within the set time period is predicted, operating according to a preset gear shifting strategy corresponding to the current moment.
In a possible embodiment, if it is predicted that the vehicle enters the braking state within the set time period, the changing the shift strategy of the vehicle from the preset shift strategy corresponding to the current time to the corresponding delayed shift strategy includes:
and if the vehicle is predicted to enter the braking state within the set time period and the braking state continues for the set time length, changing the gear shifting strategy of the vehicle from the preset gear shifting strategy corresponding to the current moment into the corresponding delayed gear shifting strategy.
In one possible embodiment, the continuously predicting whether the vehicle enters the braking state within a set time period after the current time comprises:
and continuously predicting whether the vehicle enters a braking state within a set time period after the current moment according to the detection information of the vehicle radar and the acquired traffic condition information.
In a possible embodiment, the preset gear shifting strategy corresponding to the current moment is a preset gear shifting strategy in a battery state of charge corresponding to the current moment;
the corresponding delay gear shifting strategy is a delay gear shifting strategy under the battery charge state corresponding to the current moment.
In a second aspect, an embodiment of the present application provides a gear shifting device for an electric vehicle, including:
the prediction module is used for continuously predicting whether the vehicle enters a braking state within a set time period after the current time under the condition that the current vehicle speed is greater than the preset vehicle speed;
the first operation module is used for changing a gear shifting strategy of the vehicle from a preset gear shifting strategy corresponding to the current moment into a corresponding delayed gear shifting strategy and operating according to the delayed gear shifting strategy if the vehicle is predicted to enter a braking state within the set time period; and under the same driving gear and the same accelerator state, the first gear shifting speed of the delayed gear shifting strategy is greater than the second gear shifting speed of the preset gear shifting strategy.
In a possible embodiment, the apparatus further comprises:
and the second operation module is used for operating according to a preset gear shifting strategy corresponding to the current moment under the condition that the current vehicle speed is less than the preset vehicle speed.
In a possible embodiment, the apparatus further comprises:
and the third operation module is used for operating according to a preset gear shifting strategy corresponding to the current moment if the vehicle is predicted not to enter a braking state within the set time period under the condition that the current vehicle speed is greater than the preset vehicle speed.
In a possible embodiment, the first operating module is further configured to:
and if the vehicle is predicted to enter the braking state within the set time period and the braking state continues for the set time length, changing the gear shifting strategy of the vehicle from the preset gear shifting strategy corresponding to the current moment into the corresponding delayed gear shifting strategy.
In a possible embodiment, the prediction module is further configured to:
and continuously predicting whether the vehicle enters a braking state within a set time period after the current time according to the detection information of the vehicle radar and the acquired traffic condition information.
In a possible embodiment, the preset gear shifting strategy corresponding to the current moment is a preset gear shifting strategy in a battery state of charge corresponding to the current moment;
the corresponding delay gear shifting strategy is a delay gear shifting strategy under the battery charge state corresponding to the current moment.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor and a memory, where the memory stores program code, and when the program code is executed by the processor, the processor is caused to execute the steps of the method of the first aspect.
In a fourth aspect, embodiments of the present application provide a computer storage medium storing computer instructions that, when executed on a computer, cause the computer to perform the steps of the method of the first aspect.
Due to the adoption of the technical scheme, the embodiment of the application at least has the following technical effects:
according to the scheme of the embodiment of the application, whether the vehicle enters a braking state within a set time period after the current time is continuously predicted under the condition that the current vehicle speed is greater than the preset vehicle speed, if yes, the gear shifting strategy of the vehicle is changed from the preset gear shifting strategy corresponding to the current time to a corresponding delay gear shifting strategy, and the vehicle is operated according to the delay gear shifting strategy. Therefore, after the vehicle speed is higher than a certain vehicle speed, if the vehicle is predicted to enter a braking state in a certain time period in the future, the delayed gear shifting mode is entered, and the motor is in a medium-high rotating speed, namely a constant power area when the vehicle enters the braking mode, so that the braking energy recovery is increased, the energy recovery rate during braking is improved, and the economy is further improved.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of a powertrain system of an electric vehicle according to an embodiment of the present disclosure;
FIG. 2 is a flowchart of a gear shifting method of an electric vehicle according to an embodiment of the present disclosure;
FIG. 3 is a comparison of a preset shift schedule and a delayed shift schedule provided by an embodiment of the present application;
fig. 4 is a structural block diagram of a gear shifting device of an electric vehicle according to an embodiment of the present application;
fig. 5 is a block diagram of a gear shifting device of another electric vehicle according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The word "exemplary" is used hereinafter to mean "serving as an example, embodiment, or illustration. Any embodiment described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
The terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of embodiments of the application, unless stated otherwise, "plurality" means two or more.
In the related technology, the gear shifting strategy of some electric vehicles is that when the vehicle speed is higher than a certain vehicle speed, the vehicle is shifted up, when the gear is shifted up, the working point of the motor is changed from a constant power area to a constant torque area, and if the vehicle enters a braking state soon after gear shifting, the motor works in the constant torque area most of the time when braking energy is recovered, so that the braking energy recovery is reduced, and the economy is reduced. In view of this, embodiments of the present application provide a gear shifting method and apparatus for an electric vehicle, an electronic device, and a storage medium, where after a vehicle speed is higher than a certain vehicle speed, if it is predicted that the vehicle will soon enter a braking state within a certain time period in the future and last for a certain duration, the vehicle enters a delayed gear shifting mode, and a motor is in a medium-high rotation speed, that is, a constant power region when entering the braking mode, so that braking energy recovery is increased, a kinetic energy recovery rate during braking is improved, and further economy is improved.
The preferred embodiments of the present application will be described in conjunction with the drawings of the specification, it should be understood that the preferred embodiments described herein are for illustration and explanation only, and are not intended to limit the present application, and that the embodiments and features of the embodiments may be combined with each other without conflict.
Fig. 2 illustrates a gear shifting method for an electric vehicle according to an embodiment of the present application, where the method may be performed by a control device of the electric vehicle, where the control device may be a vehicle controller, a motor controller, or a controller integrating the vehicle controller and the motor controller, and the like, which is not limited in this respect.
As shown in fig. 2, a gear shifting method for an electric vehicle according to an embodiment of the present application includes the following steps:
step S201, continuously predicting whether the vehicle enters a braking state within a set time period after the current time under the condition that the current vehicle speed is greater than a preset vehicle speed;
in this step, the preset vehicle speed may be calibrated according to the specific situation of the electric vehicle, which is not limited herein. The set time period after the current time may also be set as the case may be. For example, if the current time is 8:00 to 8:05, if it is predicted that the vehicle is at 8:04, the vehicle is determined to enter the braking state within a set time period after the current time.
In some embodiments, whether the vehicle enters the braking state in the set time period after the current time is continuously predicted in step S201 may be predicted as follows:
and continuously predicting whether the vehicle enters a braking state within a set time period after the current time according to the detection information of the vehicle radar and the acquired traffic condition information.
The detection information of the vehicle radar may include position information of an obstacle, position information of other vehicles, and the like, and the traffic condition information may include current driving road condition information of the vehicle, and the like. By combining the detection information of the vehicle radar and the acquired traffic condition information, whether the vehicle enters a braking state at a certain time after the current time can be predicted. Also, the length of time that the braking state continues may also be predicted.
Step S202, if the vehicle is predicted to enter a braking state within a set time period, changing a gear shifting strategy of the vehicle from a preset gear shifting strategy corresponding to the current moment into a corresponding delayed gear shifting strategy, and operating according to the delayed gear shifting strategy; and under the same driving gear and the same accelerator state, the first gear shifting speed of the delayed gear shifting strategy is greater than the second gear shifting speed of the preset gear shifting strategy.
The preset gear shifting strategy and the delay gear shifting strategy can both comprise corresponding relations of a driving gear, an accelerator state and a gear shifting vehicle speed, and the accelerator state can be an accelerator pedal opening.
In specific implementation, the electric vehicle may operate according to a preset shift strategy in a driving State, specifically, according to preset shift strategies in different battery states of Charge (SOC); different battery states of charge include different remaining charge ranges, such as: when SOC is more than 0 and less than or equal to SOC 1 When the gear shifting strategy is preset to be map1, the abscissa of map1 is the current gear, the ordinate is the accelerator state, and the output is the gear shifting speed; when SOC is reached 1 ＜SOC≤SOC 2 When the gear shifting strategy is preset to be map2, the abscissa of the map2 is the current gear, the ordinate is the accelerator state, and the output is the gear shifting vehicle speed; by analogy, when the SOC is n-1 ＜SOC≤SOC n And then, presetting a gear shifting strategy as mapn, setting the abscissa of the mapn as the current gear, setting the ordinate as the accelerator state, and outputting as the gear shifting speed.
Based on the above, the preset gear shifting strategy corresponding to the current moment is the preset gear shifting strategy under the battery charge state corresponding to the current moment; the corresponding delay gear shifting strategy is a delay gear shifting strategy under the battery charge state corresponding to the current moment.
Optionally, when the vehicle is predicted to enter the braking state within the set time period and the braking state is continuously set for a long time, the gear shifting strategy of the vehicle is changed from the preset gear shifting strategy corresponding to the current moment to the corresponding delayed gear shifting strategy. The set time period may be set as needed, and is not limited herein. In this way, the effectiveness of braking energy recovery can be ensured.
In the embodiment of the application, after the vehicle speed is higher than a certain vehicle speed, if the vehicle is predicted to enter a braking state in a certain time period in the future and lasts for a certain time, the vehicle enters a delayed gear shifting mode, so that a motor is in a medium-high rotating speed, namely a constant power area when the vehicle enters the braking mode, the braking energy recovery is increased, the energy recovery rate during braking is improved, and the economy is improved.
Furthermore, the braking energy recovery is considered to be the kinetic energy of the vehicle during braking, if the vehicle speed is too low, the energy of the vehicle is low, the comfort is affected by low-speed high-power recovery, and the braking switching is frequent at low vehicle speed, so that the preset gear shifting strategy is not optimized when the vehicle speed is lower than the preset vehicle speed. Therefore, the gear shifting method of the electric vehicle in the embodiment of the application further comprises the following steps:
and under the condition that the current vehicle speed is greater than the preset vehicle speed, if the fact that the vehicle does not enter a braking state within a set time period is predicted, operating according to a preset gear shifting strategy corresponding to the current time.
In addition, under the condition that the current vehicle speed is smaller than the preset vehicle speed, the operation is carried out according to a preset gear shifting strategy corresponding to the current moment.
The following describes an exemplary method for shifting an electric vehicle according to an embodiment of the present application.
Suppose that: the preset vehicle speed is V base Whether the gear shifting optimized vehicle speed is started or not is calibrated according to the actual condition; t0 is the starting moment of predicting the vehicle to enter the braking state and is determined according to the actual condition; and T1 is the duration of the predicted vehicle in the braking state and is determined according to the actual situation.
The specific implementation flow of the gear shifting method of the electric automobile is as follows:
(1) If the current vehicle speed V is less than or equal to V base Since the braking energy is recovered by the kinetic energy of the vehicle during braking
If the speed of a vehicle is too low, the energy of the vehicle is low, the comfort is influenced by low-speed high-power recovery, and the braking switching is frequent under low speed of the vehicle, so that when the speed of the vehicle is lower than the preset speed of the vehicle, the preset speed is not changedThe gear shifting strategy is optimized, namely, the gear shifting strategy is operated according to a preset gear shifting strategy.
(2) The preset gear shifting strategy generally enters different preset gear shifting strategy maps according to different SOC, the horizontal and vertical coordinates of the maps are the current gear and accelerator states respectively, and the output is the gear shifting vehicle speed.
(3) If the current vehicle speed V is greater than V base And if the vehicle state is in the driving state within the predicted time length T1 after the time T0 according to the detection information of the vehicle radar and the acquired traffic condition information, entering a preset gear shifting strategy map.
(4) If the current vehicle speed V is greater than V base If the vehicle state is in the braking state within the predicted time length T1 after the time T0 according to the detection information of the vehicle radar and the acquired traffic condition information, the optimized delayed gear shifting strategy map is entered.
As shown in fig. 3, the current shift strategy is a preset shift strategy, the optimized shift strategy is a delayed shift strategy, and when the vehicle is shifted from 1 gear to 2 gears, under different accelerator states (i.e., opening degrees of an accelerator pedal), curves of shift speeds corresponding to the current shift strategy and the optimized shift strategy are respectively shown in fig. 3.
Based on the same inventive concept, the embodiment of the present application further provides a gear shifting device for an electric vehicle, and the principle of the device to solve the problem is similar to the method in the embodiment of the present application, so that the implementation of the device can refer to the embodiment of the method, and repeated details are omitted.
As shown in fig. 4, the shifting apparatus for an electric vehicle according to the embodiment of the present application includes a prediction module 41 and a first operation module 42.
The prediction module 41 is used for continuously predicting whether the vehicle enters a braking state within a set time period after the current time under the condition that the current vehicle speed is greater than the preset vehicle speed;
the first operation module 42 is configured to change a gear shift strategy of the vehicle from a preset gear shift strategy corresponding to a current time to a corresponding delayed gear shift strategy and operate according to the delayed gear shift strategy if the vehicle is predicted to enter a braking state within a set time period; and under the same driving gear and the same accelerator state, the first gear shifting speed of the delayed gear shifting strategy is greater than the second gear shifting speed of the preset gear shifting strategy.
In a possible embodiment, as shown in fig. 5, the apparatus further comprises:
and the second operation module 43 is configured to operate according to a preset gear shifting strategy corresponding to the current time when the current vehicle speed is less than the preset vehicle speed.
In one possible embodiment, the apparatus further comprises:
and the third operation module 44 is configured to, when the current vehicle speed is greater than the preset vehicle speed, operate according to a preset gear shifting strategy corresponding to the current time if it is predicted that the vehicle does not enter a braking state within a set time period.
In a possible embodiment, the first operation module is further configured to:
and if the vehicle is predicted to enter the braking state within the set time period and the braking state continues for the set time length, changing the gear shifting strategy of the vehicle from the preset gear shifting strategy corresponding to the current moment into the corresponding delayed gear shifting strategy.
In a possible embodiment, the prediction module 41 is further configured to:
and continuously predicting whether the vehicle enters a braking state within a set time period after the current time according to the detection information of the vehicle radar and the acquired traffic condition information.
In one possible embodiment, the preset gear shifting strategy corresponding to the current moment is a preset gear shifting strategy in a battery state of charge corresponding to the current moment;
the corresponding delay gear shifting strategy is a delay gear shifting strategy under the battery charge state corresponding to the current moment.
For convenience of description, the above parts are divided into modules according to functions and described separately. Of course, the functionality of the various modules may be implemented in the same one or more pieces of software or hardware when implementing the present application.
As will be appreciated by one skilled in the art, aspects of the present application may be embodied as a system, method or program product. Accordingly, various aspects of the present application may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
With regard to the apparatus in the above embodiment, the specific implementation manner of each module has been described in detail in the embodiment related to the method, and will not be elaborated herein.
Based on the same inventive concept, the embodiment of the present application further provides an electronic device, and as the principle of solving the problem of the electronic device is similar to the method in the embodiment of the present application, the implementation of the electronic device may refer to the embodiment of the method, and repeated details are not described herein.
As shown in fig. 6, the electronic device includes a processor 600, a memory 601 and a communication interface 602, wherein the processor 600, the communication interface 602 and the memory 601 complete communication with each other through a communication bus 603; the memory 601 is used for storing programs executable by the processor 600, and the processor 600 is used for reading the programs in the memory 601 and executing the steps of the gear shifting method of any electric vehicle in the above embodiments.
The communication bus 603 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this is not intended to represent only one bus or type of bus. The communication interface 602 is used for communication between the above-described electronic apparatus and other apparatuses. The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a central processing unit, a Network Processor (NP), and the like; but may also be a Digital instruction processor (DSP), an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc.
Based on the same inventive concept, the present application further provides a computer storage medium, in which a computer program executable by a processor is stored, and when the program runs on the processor, the processor is caused to execute the steps of the gear shifting method of any one of the electric vehicles in the above embodiments.
The computer readable storage medium may be any available medium or data storage device that can be accessed by a processor in an electronic device, including but not limited to magnetic memory such as floppy disks, hard disks, magnetic tape, magneto-optical disks (MO), etc., optical memory such as CDs, DVDs, BDs, HVDs, etc., and semiconductor memory such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid State Disks (SSDs), etc.
In yet another embodiment provided by the present application, a computer program product containing instructions is further provided, which when invoked by an electronic device, causes the electronic device to perform the steps of the method for shifting gears of any electric vehicle in the above embodiments.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. A method of shifting gears in an electric vehicle, comprising:
continuously predicting whether the vehicle enters a braking state within a set time period after the current time under the condition that the current vehicle speed is greater than the preset vehicle speed;
if the vehicle is predicted to enter the braking state within the set time period, changing the gear shifting strategy of the vehicle from the preset gear shifting strategy corresponding to the current moment into a corresponding delay gear shifting strategy, and operating according to the delay gear shifting strategy; the preset gear shifting strategy and the delayed gear shifting strategy both comprise corresponding relations of a driving gear, an accelerator state and a gear shifting vehicle speed, and under the same driving gear and the same accelerator state, a first gear shifting vehicle speed of the delayed gear shifting strategy is greater than a second gear shifting vehicle speed of the preset gear shifting strategy;
the preset gear shifting strategy corresponding to the current moment is a preset gear shifting strategy under the battery charge state corresponding to the current moment; the corresponding delay gear shifting strategy is a delay gear shifting strategy under the battery charge state corresponding to the current moment.
2. The method of claim 1, further comprising:
and when the current vehicle speed is less than the preset vehicle speed, operating according to a preset gear shifting strategy corresponding to the current moment.
3. The method of claim 1, further comprising:
and under the condition that the current vehicle speed is greater than the preset vehicle speed, if the fact that the vehicle does not enter a braking state within the set time period is predicted, operating according to a preset gear shifting strategy corresponding to the current moment.
4. The method according to claim 1, wherein if the vehicle is predicted to enter the braking state within the set time period, changing the gear shift strategy of the vehicle from the preset gear shift strategy corresponding to the current time to the corresponding delayed gear shift strategy comprises:
and if the vehicle is predicted to enter the braking state within the set time period and the braking state continues for the set time length, changing the gear shifting strategy of the vehicle from the preset gear shifting strategy corresponding to the current moment into the corresponding delayed gear shifting strategy.
5. The method according to any one of claims 1 to 4, wherein the continuously predicting whether the vehicle enters the braking state within a set period of time after the current time comprises:
and continuously predicting whether the vehicle enters a braking state within a set time period after the current moment according to the detection information of the vehicle radar and the acquired traffic condition information.
6. A gear shift device for an electric vehicle, comprising:
the prediction module is used for continuously predicting whether the vehicle enters a braking state within a set time period after the current time under the condition that the current vehicle speed is greater than the preset vehicle speed;
the first operation module is used for changing a gear shifting strategy of the vehicle from a preset gear shifting strategy corresponding to the current moment into a corresponding delayed gear shifting strategy and operating according to the delayed gear shifting strategy if the vehicle is predicted to enter a braking state within the set time period; the preset gear shifting strategy and the delayed gear shifting strategy both comprise corresponding relations of a driving gear, an accelerator state and a gear shifting vehicle speed, and under the same driving gear and the same accelerator state, a first gear shifting vehicle speed of the delayed gear shifting strategy is larger than a second gear shifting vehicle speed of the preset gear shifting strategy;
the preset gear shifting strategy corresponding to the current moment is a preset gear shifting strategy under the battery charge state corresponding to the current moment; the corresponding delay gear shifting strategy is a delay gear shifting strategy under the battery charge state corresponding to the current moment.
7. The apparatus of claim 6, further comprising:
and the second operation module is used for operating according to a preset gear shifting strategy corresponding to the current moment under the condition that the current vehicle speed is less than the preset vehicle speed.
8. An electronic device, comprising a processor and a memory, wherein the memory stores program code which, when executed by the processor, causes the processor to perform the steps of the method of any of claims 1 to 5.
9. A computer-readable storage medium, characterized in that it comprises program code for causing an electronic device to perform the steps of the method of any one of claims 1 to 5, when said program code is run on the electronic device.
Priority Applications (1)
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| JP2007315536A (en) * | 2006-05-26 | 2007-12-06 | Denso Corp | Shifting operation indicating device |
| US9297455B2 (en) * | 2012-11-20 | 2016-03-29 | GM Global Technology Operations LLC | GPS-based predictive shift schedule for automatic transmission |
| KR101724505B1 (en) * | 2016-03-29 | 2017-04-07 | 현대자동차 주식회사 | Apparatus and method for shift control of vehicle |
| US10267412B2 (en) * | 2016-11-11 | 2019-04-23 | Ford Global Technologies, Llc | Upshift control for regenerative braking |
| CN107512261B (en) * | 2017-08-01 | 2019-05-17 | 北京理工大学 | PHEV shift control method in parallel based on dual power source collaboration |
| EP3508760A1 (en) * | 2018-01-05 | 2019-07-10 | Yamaha Hatsudoki Kabushiki Kaisha | Vehicle |
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