An electric vehicle transition torque output method, device, equipment, storage medium and acceleration pedal mode switching method

Abstract

The application provides an electric vehicle transition torque output method, device, equipment, storage medium and pedal mode switching method, relates to the technical field of vehicle power control, and comprises the following steps: obtaining an original pedal mode, a target pedal mode, a pedal opening degree at the time of switching, a vehicle speed at the time of switching and the like, determining an original requested torque and a target requested torque, determining a current time length based on a current time point and a pedal stabilization time point, comparing the current time length with a preset transition period to obtain a comparison result, determining a transition torque according to the comparison result, the original requested torque, the target requested torque, and a mapping relationship between a preset transition torque and the original requested torque, the target requested torque and the comparison result, and outputting the transition torque. By outputting the transition torque, the original requested torque and the target torque are prevented from jumping in steps, sudden acceleration and sudden deceleration are avoided, and the safety of vehicle driving is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle power control, in particular to an electric vehicle transition torque output method, device, equipment, storage medium and acceleration pedal mode switching method. BACKGROUND

[0002] New energy vehicles have an increasing number of driving modes during driving, such as comfort mode, sport mode, and single pedal mode. The requested torque corresponding to the accelerator pedal is different when driving in different driving modes. In the single pedal mode, stepping on the accelerator pedal accelerates, and lifting the accelerator pedal brakes. The requested torque is positive or negative at different pedal depths. During driving, driving mode switching occurs, and the requested torque jumps, especially when switching from the single pedal mode to other modes, which is prone to torque direction changes, causing sudden acceleration or deceleration, which does not match the driving intention and is prone to rear-end or being rear-ended accidents.

[0003] CN114771277A aims to solve the motor zero-crossing impact during driving, but cannot solve the sudden acceleration or deceleration problem caused by the requested torque step during driving mode switching.

[0004] CN113954656A aims to solve the contradiction between torque zero-crossing control and torque response time and acceleration nonlinearity, but cannot solve the sudden acceleration or deceleration problem caused by the requested torque step during driving mode switching. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the present application provides an electric vehicle transition torque output method, device, equipment, storage medium and pedal mode switching method to solve the technical problem of sudden acceleration and deceleration caused by the requested torque step during pedal mode switching of the electric vehicle.

[0006] The torque output method for electric vehicle acceleration pedal mode switching provided by the present application comprises:

[0007] obtaining the original pedal mode, the target pedal mode, the pedal opening at the switching time, the vehicle speed at the switching time, the current vehicle speed, the current pedal opening and the switching time point;

[0008] determining the original requested torque based on the original pedal mode, the pedal opening at the switching time and the vehicle speed at the switching time, and a mapping relationship between the original requested torque and the original pedal mode, the vehicle speed at the switching time and the pedal opening at the switching time, which is set in advance;

[0009] determine a target request torque based on the target pedal mode, the current pedal opening, the current vehicle speed, and a preset mapping relationship between a target request torque and the target pedal mode, the current vehicle speed, and the current pedal opening;

[0010] determine a current time length based on a current time point and the pedal stabilization time point;

[0011] compare the current time length with a preset transition period to obtain a comparison result;

[0012] determine a transition torque and output the transition torque according to the comparison result, the original request torque, the target request torque, and a preset mapping relationship between a transition torque and the original request torque, the target request torque, and the comparison result.

[0013] In an embodiment of the present application, the determination of the transition torque and the output of the transition torque according to the comparison result, the original request torque, the target request torque, and a preset mapping relationship between a transition torque and the original request torque, the target request torque, and the comparison result include:

[0014] if the current time length is greater than or equal to the preset transition period, the transition torque is the target request torque;

[0015] if the current time length is less than the preset transition period, a quotient of the current time length and the preset transition period is a torque change coefficient, a difference between the target request torque and the original request torque is a torque difference value, a product of the torque difference value and the torque change coefficient is a torque change value, and the transition torque is equal to a sum of the original request torque and the torque change value.

[0016] The present application also provides an acceleration pedal mode switching method for an electric vehicle, which includes:

[0017] based on a signal time point of an acceleration pedal mode switching signal, obtaining a pedal opening change rate in a preset detection period after the signal time point,

[0018] comparing the pedal opening change rate with a preset pedal stabilization threshold value,

[0019] if the pedal opening change rate is less than or equal to the pedal stabilization threshold value, performing the torque output method for the acceleration pedal mode switching of the electric vehicle as described above,

[0020] If the pedal opening degree change rate is greater than the pedal stability threshold, then wait until the pedal opening degree change is less than or equal to the pedal stability threshold. In an embodiment of the present application, based on the switching time speed, the switching time pedal opening degree, and the change of the accelerator pedal thereafter, the determination of the switching mode includes: when the switching time speed is less than a speed preset value, the switching mode is a direct switching mode; when the switching time speed is greater than the speed preset value, based on the switching time pedal opening degree and the change of the accelerator pedal thereafter, a suitable switching mode is selected.

[0021] In an embodiment of the present application, before obtaining the pedal opening degree change rate in a preset detection period after the signal time point based on the accelerator pedal mode switching signal, the following steps are included:

[0022] Based on the mode conversion request signal, the request time pedal opening degree and the request after pedal opening degree are obtained and analyzed:

[0023] If the request time pedal opening degree is 0 and the request after pedal opening degree is 0, the original pedal mode is maintained,

[0024] If the request time pedal opening degree is 0 and the request after pedal opening degree is greater than or less than 0, or the request time pedal opening degree is greater than or less than 0 and the request after pedal opening degree is 0, the target pedal mode is switched to,

[0025] If the request time pedal opening degree is greater than or less than 0 and the request after pedal opening degree is greater than or less than 0, the accelerator pedal mode switching signal is sent, and the pedal opening degree change rate in a preset detection period after the signal time point is obtained.

[0026] In an embodiment of the present application, before obtaining the request time pedal opening degree and the request after pedal opening degree and analyzing, the following steps are included:

[0027] Based on the mode conversion request signal, the request time vehicle speed is obtained, and the request time vehicle speed is compared with a speed preset value to obtain a comparison result;

[0028] According to the mapping relationship between the comparison result and the pre-set switching logic and comparison result, the switching logic is determined.

[0029] In an embodiment of the present application, the switching logic includes:

[0030] If the request time vehicle speed meets the speed preset value, the target pedal mode is entered;

[0031] When the request time vehicle speed exceeds the speed preset value, the request time pedal opening degree and the request after pedal opening degree are obtained and analyzed.

[0032] In an embodiment of the present application, the current vehicle speed is compared with the speed preset value, and if the current vehicle speed is less than the speed preset value, the target pedal mode is entered.

[0033] The current pedal opening is compared with the opening preset value, and if the current pedal opening is equal to the opening preset value, the target pedal mode is entered.

[0034] The present application also provides a transition torque output device for switching the acceleration pedal mode of an electric vehicle, comprising:

[0035] A data acquisition module acquires the original pedal mode, the target pedal mode, the pedal opening at the switching time, the vehicle speed at the switching time, the current vehicle speed, the current pedal opening, and the switching time point,

[0036] A torque determination module determines the original request torque based on the original pedal mode, the pedal opening at the switching time, and the vehicle speed at the switching time, and a preset mapping relationship between the original request torque and the original pedal mode, the vehicle speed at the switching time, and the pedal opening at the switching time; and determines the target request torque based on the target pedal mode, the current pedal opening, and the current vehicle speed, and a preset mapping relationship between the target request torque and the target pedal mode, the current vehicle speed, and the current pedal opening.

[0037] A timing module determines a current time length based on the current time point and the pedal stabilization time point, compares the current time length with a preset transition period, and obtains a comparison result.

[0038] A transition torque output module determines a transition torque based on the comparison result, the original request torque, the target request torque, and a preset mapping relationship between the transition torque and the original request torque, the target request torque, and the comparison result, and outputs the transition torque.

[0039] The present application also provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the electric vehicle transition torque output method of any one of the preceding embodiments.

[0040] The present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor of a computer, causes the computer to execute the electric vehicle transition torque output method of any one of the preceding embodiments.

[0041] The application has the beneficial effect that the electric vehicle pedal mode switching torque transition method in the application outputs transition torque when switching the pedal mode, prevents the original request torque and target torque from jumping, causes sudden acceleration and sudden deceleration, avoids rear-end and being rear-ended accidents, and improves the safety of vehicle driving.

[0042] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0043] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application. It is clear that the drawings in the following description are only some embodiments of the application, and other drawings can be obtained from these drawings by those of ordinary skill in the art without creative labor. In the drawings:

[0044] Figure 1 is a flowchart of the transition torque output method shown by an exemplary embodiment of the application;

[0045] Figure 2 is a flowchart of the acceleration pedal mode switching method shown by an exemplary embodiment of the application.

[0046] Figure 3 is a flowchart of the electric vehicle acceleration pedal switching from non-single pedal mode to single pedal mode of the embodiment.

[0047] Figure 4 is a flowchart of the electric vehicle acceleration pedal switching from single pedal mode to non-single pedal mode of the embodiment.

[0048] Figure 5 is a block diagram of the transition torque output device provided by an embodiment of the application.

[0049] Figure 6 shows a structural schematic diagram of a computer system of an electronic device suitable for implementing the embodiments of the application. DETAILED DESCRIPTION

[0050] The embodiments of the application will be described below with reference to the drawings and preferred embodiments, and those skilled in the art can easily understand other advantages and effects of the application from the disclosure in the specification. The application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the application. It should be understood that the preferred embodiments are only for illustration of the application, and are not intended to limit the protection scope of the application.

[0051] It is to be understood that the figures provided in the following embodiments are only schematic and that the drawings only show components related to the application, and not all the components of an apparatus, as well as the number, shape, and sizes of the components shown in the drawings are intended to illustrate the basic principles of the application, and thus the shapes, numbers, and sizes of the components in actual implementation can be changed arbitrarily, and the layout of the components can be more complex.

[0052] In the following description, numerous specific details are discussed in order to provide a thorough understanding of the embodiments of the application. However, it will be apparent to one skilled in the art that the embodiments of the application can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the embodiments of the application.

[0053] Figure 1 is a flow chart of a torque output method for mode switching of an acceleration pedal of an electric vehicle according to an exemplary embodiment of the present application, as shown in Figure 1 The torque output method for mode switching of an acceleration pedal of an electric vehicle includes:

[0054] Step S101: obtaining an original pedal mode, a target pedal mode, a pedal opening degree at switching, a vehicle speed at switching, a current vehicle speed, a current pedal opening degree, and a switching time point.

[0055] In the present embodiment, the pedal opening degree at switching is the opening degree value of the acceleration pedal when the transition torque output method is started, i.e., the opening degree value when the acceleration pedal is stable, the vehicle speed at switching is the speed of the vehicle when the transition torque output method is started, the current vehicle speed is the speed value of the vehicle at a certain point when the method is running, which can change over time, the current pedal opening degree is the value of the opening degree of the acceleration pedal of the vehicle at a certain point when the method is running, which can change over time, and the switching time point is the time point when the method is started.

[0056] Step S102: determining an original requested torque based on the original pedal mode, the pedal opening degree at switching, and the vehicle speed at switching, and a mapping relationship between the original requested torque and the original pedal mode, the vehicle speed at switching, and the pedal opening degree at switching, which is set in advance, and determining a target requested torque based on the target pedal mode, the current pedal opening degree, and the current vehicle speed, and a mapping relationship between the target requested torque and the target pedal mode, the current vehicle speed, and the current pedal opening degree, which is set in advance.

[0057] In the embodiment, each pedal mode is preset with a mapping relationship between the accelerator pedal opening, vehicle speed and requested torque. When the vehicle is running in a certain pedal mode, the determined requested torque is obtained according to the current pedal opening and the current vehicle speed. The mapping relationship of each pedal mode is different. This relationship can be understood by using a three-dimensional table. For example, in a certain pedal mode, the X-axis is the pedal opening, the Y-axis is the vehicle speed, and the Z-axis is the requested torque.

[0058] Step S103: determining the current duration based on the current time point and the pedal stabilization time point.

[0059] In the embodiment, the current time point is the time point when the method runs to a certain point, which is a value updated in real time as time increases. The current duration is the difference between the current time point and the pedal stabilization time point.

[0060] Step S104: comparing the current duration with the preset transition period to obtain a comparison result.

[0061] In the embodiment, as known from the above, the current duration starts from 0 and increases, and the switching time point is the timing zero position of the current duration.

[0062] Step S105: determining the transition torque according to the comparison result, the original requested torque, the target requested torque, and the mapping relationship between the transition torque and the original requested torque, the target requested torque and the comparison result, and outputting the transition torque.

[0063] In the embodiment, if the current duration is greater than or equal to the preset transition period, the transition torque is the target requested torque.

[0064] If the current duration is less than the preset transition period, the quotient of the current duration and the preset transition period is a torque change coefficient, the difference between the target requested torque and the original requested torque is a torque difference value, the product of the torque difference value and the torque change coefficient is a torque change value, and the transition torque is equal to the sum of the original requested torque and the torque change value.

[0065] In the embodiment, let the preset transition period be T, the current duration be t, and the transition torque be c, the original requested torque be a, and the target requested torque be b. According to the above, the transition torque output formula is:

[0066] c=t / T*(b-a)+a

[0067] The derivation process is as follows:

[0068] c=a-t / T*a+t / T*b

[0069] c=a*(T-t) / T+t / T*b

[0070] Wherein, the change range of t / T is [0, 1], t / T slowly increases from 0 to 1, the change range of (T-t) / T is [0, 1], (T-t) / T gradually decreases from 1 to 0, and the sum of (T-t) / T and t / T is 1 when changing, thus setting m=(T-t) / T, m gradually decreases from 1 to 0, n=t / T, n slowly increases from 0 to 1, then the above formula can be transformed into:

[0071] c=am+bn

[0072] Wherein, c is the transition torque;

[0073] a is the original request torque, which is determined by the stable pedal opening degree and the switching speed in the determined original pedal mode, and is a fixed value;

[0074] b is the target request torque, which will change in real time according to the current pedal opening degree and the current vehicle speed in the case of the determined target pedal mode;

[0075] m is the original request torque weight factor, which gradually decreases from 1;

[0076] n is the target request torque weight factor, which gradually increases from 0, and m+n=1.

[0077] After the formula is transformed, the size between the target request torque b and the transition torque c can also be compared to determine when to output the transition torque and when to equal the target request torque, so as to complete the acceleration pedal mode switching.

[0078] Figure 2 is a flowchart of the acceleration pedal mode switching method shown in an exemplary embodiment of the present application, as shown in Figure 2 An acceleration pedal mode switching method of an electric vehicle, comprising:

[0079] Step S201: Based on the signal time point of the acceleration pedal mode switching signal, the pedal opening degree change rate in the preset detection period after the signal time point is obtained.

[0080] In an exemplary embodiment, step S201 based on the signal time point of the acceleration pedal mode switching signal, before obtaining the pedal opening degree change rate in the preset detection period after the signal time point, still includes step S301.

[0081] Step S301: Based on the mode conversion request signal, the pedal opening degree at the request time and the pedal opening degree after the request are obtained and analyzed: if the pedal opening degree at the request time is 0 and the pedal opening degree after the request is 0, the original pedal mode is maintained; if the pedal opening degree at the request time is 0 and the pedal opening degree after the request is greater than or less than 0, or the pedal opening degree at the request time is greater than or less than 0 and the pedal opening degree after the request is 0, the target pedal mode is switched to; if the pedal opening degree at the request time is greater than or less than 0 and the pedal opening degree after the request is greater than or less than 0, an acceleration pedal mode switching signal is sent, and the pedal opening degree change rate in a preset detection period after the signal time point is obtained.

[0082] In an exemplary embodiment, before step S301, the pedal opening degree at the request time and the pedal opening degree after the request are obtained and analyzed based on the mode conversion request signal, step S302 is further included.

[0083] Step S302: Based on the mode conversion request signal, the vehicle speed at the request time is obtained, and the vehicle speed at the request time is compared with the speed preset value to obtain a comparison result; according to the mapping relationship between the comparison result and the pre-set switching logic and the comparison result, the switching logic is determined.

[0084] In an exemplary embodiment, the switching logic includes: if the vehicle speed at the request time meets the speed preset value, the target pedal mode is entered; and if the vehicle speed at the request time exceeds the speed preset value, the pedal opening degree at the request time and the pedal opening degree after the request are obtained and analyzed.

[0085] Step S202: The pedal opening degree change rate is compared with the pre-set pedal stability threshold.

[0086] In this embodiment, the pedal opening degree change rate is compared with the pre-set pedal stability threshold, in order to detect whether the pedal is stable. The pedal stability threshold is formulated according to different vehicle models, vehicle conditions and user experience, and can be adjusted according to actual conditions.

[0087] Step S203: If the pedal opening degree change rate is less than or equal to the pedal stability threshold, the torque output method of the acceleration pedal mode switching of the electric vehicle is executed.

[0088] In this embodiment, the switching pedal opening degree is obtained when the pedal opening degree change rate is less than or equal to the pedal stability threshold, and at this time the acceleration pedal state can be regarded as stable. The acceleration pedal opening degree value obtained at this time is the switching pedal opening degree.

[0089] Step S204: If the pedal opening degree change rate is greater than the pedal stability threshold, the pedal opening degree change amount is waited to be less than or equal to the pedal stability threshold.

[0090] In the embodiment, if the change rate of the accelerator pedal opening degree is greater than the pedal stability threshold, the accelerator pedal state should be considered unstable, and the pedal opening degree is less than or equal to the pedal stability threshold.

[0091] It should be noted that in the embodiment, the provided pedal mode includes a single pedal mode and a non-single pedal mode, and the non-single pedal mode is a set of various pedal modes. As known from the above, when the single pedal mode outputs the torque, the torque value output by the single pedal is positive or negative, and the mapping relationship of different pedal modes is different. Therefore, the conversion problem between the single pedal mode and the non-single pedal mode is mainly discussed in the embodiment, and the set of non-single pedal modes is regarded as a pedal mode. When the original pedal mode is the single pedal mode, the target pedal mode is the non-single pedal mode. When the original pedal mode is the non-single pedal mode, the target pedal mode is the single pedal mode. In other embodiments, the switching method between the other two different pedal modes can also be used.

[0092] In the embodiment, the transition torque is determined and output based on the original request and the target request torque according to the transition torque output method. In the formula, the target torque weight factor gradually increases, and the original request torque weight factor continuously decreases. When the transition torque slowly changes to the real-time changing target request torque, the transition from the original request torque to the target request torque is realized.

[0093] In the embodiment, when the current vehicle speed is less than the speed preset value or the accelerator pedal opening degree suddenly changes to 0 in the method, the target pedal mode can be directly switched.

[0094] Figure 3 The flowchart of the acceleration pedal mode switching method of the electric vehicle in the embodiment is shown in FIG. 1. Figure 3 The embodiment takes the non-single pedal switching to the single pedal as an example, but it should not be understood that the acceleration pedal mode switching method is only applicable to the above two pedal modes.

[0095] After receiving the mode conversion request signal, the vehicle speed at the request time is detected. If the vehicle speed is less than the speed preset value, the single pedal mode is directly entered. The speed preset value is set to 3 kilometers per hour. In other embodiments, the speed preset value can be other speeds, and the speed preset value can be adjusted according to actual needs. At any time during the operation of the method, if the current vehicle speed is less than the speed preset value, the single pedal mode can be directly entered. If the speed is greater than the speed preset value when switching, the pedal opening degree at the request time and the pedal opening degree after the request are obtained based on the mode conversion request signal, and are analyzed.

[0096] If the pedal opening degree at the request time is 0 and the pedal opening degree after the request is 0, the non-single pedal mode is maintained,

[0097] If the pedal opening degree at the request time is 0 and the pedal opening degree after the request is greater than or less than 0, or the pedal opening degree at the request time is greater than or less than 0 and the pedal opening degree after the request is 0, the single pedal mode is switched to,

[0098] If the pedal opening degree at the request time is greater than or less than 0 and the pedal opening degree after the request is greater than or less than 0, an acceleration pedal mode switching signal is sent, the pedal opening degree change rate in a preset detection period after the signal time point is obtained, and after the pedal opening degree change amount is less than or equal to a pedal stability threshold, a transition torque output method is entered. The following is an introduction to the output method flow of the transition torque:

[0099] After the acceleration pedal is stable, the original pedal mode, the target pedal mode, the pedal opening degree at the switching time, the vehicle speed at the switching time, the current vehicle speed, the current pedal opening degree and the switching time point are obtained, and the original requested torque and the target requested torque are determined. As known from the above description, the formula for calculating the output transition torque is c = am + bn. In the process of outputting the transition torque, the values of b and c are repeatedly compared. If b is greater than or equal to c, the single pedal mode is entered. If b is less than c, the cycle calculation and comparison are continued until b is greater than or equal to c, the single pedal mode is entered, and in a preset transition period, the current vehicle speed is less than a speed preset value, or the acceleration pedal opening degree becomes 0, the single pedal mode can also be directly switched.

[0100] Figure 4 The flowchart of the acceleration pedal mode switching method of the electric vehicle of the present embodiment is shown in FIG. 1. The present embodiment takes the single pedal switching to the non-single pedal as an example, but it should not be understood that the acceleration pedal mode switching method is only applicable to the above two pedal modes. Figure 4

[0101] After receiving the mode conversion request signal, the vehicle speed at the request time is detected. If it is less than the speed preset value, the non-single pedal mode is directly entered. The speed preset value is set to 3 kilometers per hour. In other embodiments, it can also be other speeds. This speed preset value can be adjusted according to actual needs. At any time during the operation of the present method, if the speed is lower than the speed preset value, the non-single pedal mode is entered. If the speed at the switching time is greater than the speed preset value, based on the mode conversion request signal, the pedal opening degree at the request time and the pedal opening degree after the request are obtained and analyzed.

[0102] If the pedal opening degree at the request time is 0 and the pedal opening degree after the request is 0, the single pedal mode is maintained,

[0103] If the pedal opening degree at the request time is 0 and the pedal opening degree after the request is greater than or less than 0, or the pedal opening degree at the request time is greater than or less than 0 and the pedal opening degree after the request is 0, the non-single pedal mode is switched to,​

[0104] If the pedal opening degree is greater than or less than 0 at the request time, and the pedal opening degree is greater than or less than 0 after the request, an acceleration pedal mode switching signal is sent, the pedal opening degree change rate in a preset detection period after the signal time point is obtained, and after the pedal opening degree change amount is less than or equal to the pedal stability threshold, the transition torque output method is entered. The following is an introduction to the output method process of the transition torque:

[0105] After the acceleration pedal is stable, the original request torque and the real-time changed target request torque are obtained. As known from the above description, the formula for calculating the output transition torque is c = am + bn. During the output of the transition torque, the values of b and c are repeatedly compared. If b is less than or equal to c, the non-single pedal mode is entered. If b is greater than c, the loop calculation comparison is continued until b is less than or equal to c, the non-single pedal mode is entered, and the current vehicle speed is less than the speed preset value within the preset transition period, or the acceleration pedal opening degree becomes 0, the non-single pedal mode can also be directly switched.

[0106] Figure 5 is the architecture diagram of the transition torque output device of an embodiment provided by the present application, as shown in Figure 5 A transition torque output device for acceleration pedal mode switching of an electric vehicle, comprising:

[0107] A data acquisition module 501 acquires the original pedal mode, the target pedal mode, the pedal opening degree at the switching time, the vehicle speed at the switching time, the current vehicle speed, the current pedal opening degree, and the switching time point.

[0108] A torque determination module 502 determines the original request torque based on the original pedal mode, the pedal opening degree at the switching time, and the vehicle speed at the switching time, and a preset mapping relationship between the original request torque and the original pedal mode, the vehicle speed at the switching time, and the pedal opening degree at the switching time. The target request torque is determined based on the target pedal mode, the current pedal opening degree, the current vehicle speed, and a preset mapping relationship between the target request torque and the target pedal mode, the current vehicle speed, and the current pedal opening degree.

[0109] A timing module 503 determines the current duration based on the current time point and the pedal stability time point, compares the current duration with a preset transition period, and obtains a comparison result.

[0110] A transition torque output module 504 determines and outputs the transition torque according to the comparison result, the original request torque, the target request torque, and a preset mapping relationship between the transition torque and the original request torque, the target request torque, and the comparison result.

[0111] Embodiments of the present application also provide an electronic device, comprising: one or more processors; a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the method for outputting transition torque of an electric vehicle provided in each of the above embodiments.

[0112] Figure 6 A structural diagram of a computer system of an electronic device suitable for implementing embodiments of the present application is shown. It should be noted that, Figure 6 The computer system 600 of the electronic device shown is only an example and should not impose any limitation on the functions and use range of embodiments of the present application.

[0113] As Figure 6 shown, the computer system 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 602 or programs loaded from a storage portion 608 into a random access memory (RAM) 603, such as performing the method in the above embodiments. In the RAM 603, various programs and data required for system operation are also stored. The CPU 601, the ROM 602, and the RAM 603 are connected to each other through a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0114] The following components are connected to the I / O interface 605: an input portion 606 including a keyboard, a mouse, and the like; an output portion 607 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), and the like, and a speaker, and the like; a storage portion 608 including a hard disk, and the like; and a communication portion 609 including a network interface card such as a LAN (Local Area Network) card, a modem, and the like. The communication portion 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as necessary. A removable recording medium 611 such as a magnetic disk, an optical disc, a magneto-optical disc, a semiconductor memory, and the like is attached to the drive 610 as necessary, so that a computer program read therefrom is installed in the storage portion 608 as necessary.

[0115] In particular, the processes described above with reference to the flow charts can be implemented as computer software programs in accordance with embodiments of the present application. For example, embodiments of the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program comprising computer programs for performing the methods illustrated by the flow charts. In such embodiments, the computer program can be downloaded and installed from a network via the communication section 609 and / or installed from the removable media 611. When the computer program is executed by the central processing unit (CPU) 601, various functions defined in the system of the present application are performed.

[0116] It should be noted that the computer readable medium shown in the embodiments of the present application can be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium may, for example, be an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (Compact Disc Read-Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, the computer readable signal medium can include a data signal propagated in a baseband or as a carrier wave in a propagated data signal, in which the computer readable computer program is carried. Such a propagated data signal can take on many forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium can also be any computer readable medium other than the computer readable storage medium that can send, propagate or transfer the program for use by or in connection with the instruction execution system, apparatus or device. The computer program contained on the computer readable medium can be transmitted in any suitable medium, including but not limited to wireless, wired, or the like, or any suitable combination of the above.

[0117] The flow and block diagrams in the drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flow and block diagrams can represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may be executed in the reverse order, depending on the functionality involved. It will also be noted that each block of the block diagrams and / or flowchart illustrations, and combinations thereof, can be implemented by special purpose hardware-based systems that perform the specified functions or operations, or combinations of special purpose hardware and computer instructions.

[0118] The units described in the embodiments of the present application can be implemented by software, or by hardware, or by a combination of software and hardware. The names of the units described are merely intended to be used for better understanding the embodiments of the present application, and not intended to be used for limiting the units themselves.

[0119] Another aspect of the present application provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor of a computer, and causes the computer to perform the torque output method. The computer readable storage medium can be included in the electronic device described in the above embodiments, or can exist separately from the electronic device.

[0120] Another aspect of the present application provides a computer program product or a computer program, which includes computer instructions. The computer instructions are stored in a computer readable storage medium. A processor of a computer reads the computer instructions from the computer readable storage medium, and executes the computer instructions, so that the computer performs the electric vehicle transition torque output method provided in the above embodiments.

[0121] The above embodiments are merely illustrative of the principles of the present application and the effects thereof, and are not intended to limit the present application. Any person skilled in the art can make modifications or changes to the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas of the present application shall be covered by the claims of the present application.

Claims

1. A method for transient torque output in an electric vehicle, characterized in that, include: Obtain the original pedal mode, target pedal mode, pedal opening at the time of switching, vehicle speed at the time of switching, current vehicle speed, current pedal opening, and switching time point; Based on the original pedal mode, the pedal opening during switching, and the vehicle speed during switching, as well as the pre-set mapping relationship between the original requested torque and the original pedal mode, the vehicle speed during switching, and the pedal opening during switching, the original requested torque is determined; The target requested torque is determined based on the target pedal mode, the current pedal opening, the current vehicle speed, and the pre-set mapping relationship between the target requested torque and the target pedal mode, the current vehicle speed, and the current pedal opening. Determine the current duration based on the current time point and the pedal stabilization time point; The current duration is compared with the preset transition period to obtain the comparison result; Based on the comparison results, the original requested torque, the target requested torque, and the pre-set mapping relationship between the transition torque and the original requested torque, the target requested torque, and the comparison results, the transition torque is determined and output. Specifically, determining and outputting the transition torque based on the comparison result, the original requested torque, the target requested torque, and a pre-set mapping relationship between the transition torque and the original requested torque, the target requested torque, and the comparison result includes: If the current duration is greater than or equal to the preset transition period, then the transition torque is the target requested torque; If the current duration is less than the preset transition period, then the quotient of the current duration and the preset transition period is the torque change coefficient, the difference between the target requested torque and the original requested torque is the torque difference value, the product of the torque difference value and the torque change coefficient is the torque change value, and the transition torque is equal to the sum of the original requested torque and the torque change value.

2. A method for switching accelerator pedal modes in an electric vehicle, characterized in that, include: Based on the signal time point of the accelerator pedal mode switching signal, the rate of change of pedal opening during a preset detection period after the signal time point is obtained. The rate of change of pedal opening is compared with a preset pedal stability threshold. If the rate of change of the pedal opening is less than or equal to the pedal stability threshold, then the torque output method for switching the accelerator pedal mode in an electric vehicle as described in claim 1 is executed. If the rate of change of pedal opening is greater than the pedal stability threshold, then wait until the change in pedal opening is less than or equal to the pedal stability threshold.

3. The electric vehicle accelerator pedal mode switching method according to claim 2, characterized in that, Before acquiring the rate of change of pedal opening within a preset detection period after the signal time point based on the accelerator pedal mode switching signal, the process includes: Based on the mode transition request signal, the pedal opening at the time of the request and the pedal opening after the request are obtained and analyzed. If the pedal opening is 0 at the time of the request, and the pedal opening is 0 after the request, then the original pedal mode is maintained. If the pedal opening is 0 at the time of the request, and the pedal opening is greater than or less than 0 after the request; or if the pedal opening is greater than or less than 0 at the time of the request, and the pedal opening is 0 after the request, then switch to the target pedal mode. If the pedal opening is greater than or less than 0 at the time of the request, and the pedal opening is greater than or less than 0 after the request, then the accelerator pedal mode switching signal is issued, and the pedal opening change rate within a preset detection period after the signal time point is obtained.

4. The electric vehicle accelerator pedal mode switching method according to claim 3, characterized in that, Before obtaining and analyzing the pedal opening at the time of the request and the pedal opening after the request, the following steps are included: Based on the mode conversion request signal, the vehicle speed at the time of request is obtained, and the vehicle speed at the time of request is compared with a preset speed value to obtain a comparison result; The switching logic is determined based on the comparison result and the mapping relationship between the pre-set switching logic and the comparison result.

5. The electric vehicle accelerator pedal mode switching method according to claim 4, characterized in that, The switching logic includes: If the vehicle speed meets the preset speed value at the time of the request, then the target pedal mode is entered; When the vehicle speed exceeds the preset speed value at the time of the request, the pedal opening at the time of the request and the pedal opening after the request are obtained and analyzed.

6. The electric vehicle accelerator pedal mode switching method according to claim 5, characterized in that: The current vehicle speed is compared with the preset speed value. If the current vehicle speed is less than the preset speed value, the target pedal mode is entered. The current pedal opening is compared with the preset opening value. If the current pedal opening is equal to the preset opening value, the target pedal mode is entered.

7. A transition torque output device for switching accelerator pedal modes in an electric vehicle, characterized in that, include: The data acquisition module acquires the original pedal mode, the target pedal mode, the pedal opening at the time of switching, the vehicle speed at the time of switching, the current vehicle speed, the current pedal opening, and the switching time. The torque determination module determines the original requested torque based on the original pedal mode, the pedal opening at the time of switching, the vehicle speed at the time of switching, and a pre-set mapping relationship between the original requested torque and the original pedal mode, the vehicle speed at the time of switching, and the pedal opening at the time of switching. The target requested torque is determined based on the target pedal mode, the current pedal opening, the current vehicle speed, and the pre-set mapping relationship between the target requested torque and the target pedal mode, the current vehicle speed, and the current pedal opening. The timing module determines the current duration based on the current time point and the pedal stabilization time point, and compares the current duration with a preset transition period to obtain a comparison result; The transition torque output module determines and outputs the transition torque based on the comparison result, the original requested torque, the target requested torque, and a pre-set mapping relationship between the transition torque and the original requested torque, the target requested torque, and the comparison result. Specifically, determining and outputting the transition torque based on the comparison result, the original requested torque, the target requested torque, and a pre-set mapping relationship between the transition torque and the original requested torque, the target requested torque, and the comparison result includes: If the current duration is greater than or equal to the preset transition period, then the transition torque is the target requested torque; If the current duration is less than the preset transition period, then the quotient of the current duration and the preset transition period is the torque change coefficient, the difference between the target requested torque and the original requested torque is the torque difference value, the product of the torque difference value and the torque change coefficient is the torque change value, and the transition torque is equal to the sum of the original requested torque and the torque change value.

8. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device for storing one or more programs that, when executed by one or more processors, cause the electronic device to implement the electric vehicle transition torque output method as described in claim 1.

9. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by the computer's processor, causes the computer to perform the electric vehicle transition torque output method as described in claim 1.

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