Vehicle driving control method and device, equipment, storage medium and product

Abstract

The invention belongs to the technical field of electric vehicles, and discloses a vehicle driving control method, device and equipment, a storage medium and a product. The method comprises the steps of determining an EDD basic target state according to vehicle operation information corresponding to a to-be-controlled vehicle, determining an EDD flag bit according to the vehicle operation information and the EDD basic target state, then determining an initial EDD motor state corresponding to the to-be-controlled vehicle, determining a target EDD motor state according to the initial EDD motor state and the EDD flag bit, and controlling the to-be-controlled vehicle according to the target EDD motor state. And performing driving control on the to-be-controlled vehicle based on the target EDD motor state. The method comprises the following steps: determining an EDD basic target state according to vehicle operation information, determining an EDD flag bit according to the vehicle operation information and the EDD basic target state, determining a target EDD motor state according to an initial EDD motor state and the EDD flag bit, and effectively switching a driving mode of the electric vehicle based on the target EDD motor state to realize two-wheel-drive or four-wheel-drive state switching of the electric vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a vehicle drive control method, device, equipment, storage medium and product. Background Art

[0002] Electric vehicles have the advantages of energy saving, high efficiency, low or zero emissions, low noise, fast acceleration, and low operating costs. The electric vehicle market is growing, and various OEMs have begun to develop electric vehicles. When electric vehicles are equipped with a drive motor and an electronic disconnect differential on the front and rear axles, they can achieve two-wheel drive and four-wheel drive functions. Two-wheel drive electric vehicles have the advantages of low energy consumption and long battery life, and four-wheel drive electric vehicles have the advantages of strong power and strong ability to escape from extreme roads. Therefore, how to effectively switch the drive mode of electric vehicles has become a problem that needs to be solved urgently. Summary of the invention

[0003] The main purpose of this application is to provide a vehicle drive control method, device, equipment, storage medium and product, aiming to solve the technical problem of how to effectively switch the drive mode of an electric vehicle.

[0004] To achieve the above object, the present application provides a vehicle driving control method, the vehicle driving control method comprising the following steps:

[0005] Determine an EDD basic target state according to vehicle operation information corresponding to the vehicle to be controlled, and determine an EDD flag according to the vehicle operation information and the EDD basic target state;

[0006] Determining an initial EDD motor state corresponding to the vehicle to be controlled;

[0007] A target EDD motor state is determined according to the initial EDD motor state and the EDD flag, and the vehicle to be controlled is driven based on the target EDD motor state.

[0008] Optionally, the step of determining an EDD basic target state according to vehicle operation information corresponding to the vehicle to be controlled, and determining an EDD flag according to the vehicle operation information and the EDD basic target state specifically includes:

[0009] Determine a four-wheel drive first flag and a four-wheel drive second flag according to vehicle operation information corresponding to the vehicle to be controlled, and determine an EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag;

[0010] An EDD flag is determined according to the EDD basic target state and the vehicle operation information, and the EDD flag includes: an EDD speed flag, an EDD state change stop flag, and an EDD torque flag.

[0011] Optionally, the step of determining the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle operation information corresponding to the vehicle to be controlled, and determining the EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag, specifically includes:

[0012] Determine a four-wheel drive first flag position and a four-wheel drive second flag position according to vehicle operation information corresponding to the vehicle to be controlled;

[0013] If the four-wheel drive second flag is reset, the EDD basic target state is the two-wheel drive state;

[0014] When the four-wheel drive second flag is in position, if the driving mode corresponding to the vehicle to be controlled is the off-road mode, or the driving mode is the road mode and the four-wheel drive first flag is in position, the EDD basic target state is the four-wheel drive state.

[0015] Optionally, the step of determining the four-wheel drive first flag position and the four-wheel drive second flag position according to the vehicle operation information corresponding to the vehicle to be controlled specifically includes:

[0016] Obtain the current battery power, target battery power and current vehicle speed from the vehicle operation information corresponding to the vehicle to be controlled;

[0017] Calculating the power difference between the current battery power and the target battery power, and determining a power threshold value according to the power difference and the current vehicle speed;

[0018] When the power required by the driver is greater than or equal to the power threshold, or the torque required by the driver is greater than or equal to the first preset threshold, setting the first flag position of the four-wheel drive;

[0019] When the vehicle state is in high pressure state or ready state, and the actual EDD state is in non-error state, the four-wheel drive second flag is set.

[0020] Optionally, the step of determining the EDD flag according to the EDD basic target state and the vehicle operation information specifically includes:

[0021] Calculating the input shaft speed of the rear axle differential according to the current vehicle speed, the rear axle gearbox speed ratio and the tire diameter in the vehicle operation information;

[0022] Calculating an absolute value of a speed difference between a speed of the input shaft of the rear axle differential and a speed of the rear axle motor, and setting an EDD speed flag when the absolute value is less than or equal to a second preset threshold;

[0023] When the EDD basic target state is equal to the actual EDD state, the EDD state change stop flag is set;

[0024] When the absolute value of the actual torque of the rear axle motor in the vehicle operation information is less than or equal to the third preset threshold, the EDD torque flag is set.

[0025] Optionally, the step of determining the target EDD motor state according to the initial EDD motor state and the EDD flag bit specifically includes:

[0026] When the initial EDD motor state is the four-wheel drive state, if the EDD state change stop flag in the EDD flag is reset or the actual EDD state is the two-wheel drive state, the target EDD motor state is the torque reduction state;

[0027] When the initial EDD motor state is in the torque reduction state, if the EDD state change stop flag is reset and the EDD torque flag in the EDD flag is set, the target EDD motor state is in the disconnected state;

[0028] When the initial EDD motor state is the disconnected state, if the actual EDD state is the two-wheel drive state, the target EDD motor state is the two-wheel drive state;

[0029] When the initial EDD motor state is a two-wheel drive state, if the EDD state change stop flag is reset or the actual EDD state is a four-wheel drive state, the target EDD motor state is a speed regulation state;

[0030] When the initial EDD motor state is the speed regulating state, if the EDD state change stop flag is reset and the EDD speed flag in the EDD flag is set, the target EDD motor state is the engaged state;

[0031] When the initial EDD motor state is the engaged state, if the actual EDD state is the four-wheel drive state, the target EDD motor state is the four-wheel drive state.

[0032] In addition, to achieve the above-mentioned purpose, the present application also provides a vehicle driving control device, the vehicle driving control device comprising:

[0033] A flag determination module, used to determine an EDD basic target state according to vehicle operation information corresponding to the vehicle to be controlled, and determine an EDD flag according to the vehicle operation information and the EDD basic target state;

[0034] A state determination module, used to determine an initial EDD motor state corresponding to the vehicle to be controlled;

[0035] A drive control module is used to determine a target EDD motor state according to the initial EDD motor state and the EDD flag, and to drive and control the vehicle to be controlled based on the target EDD motor state.

[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle drive control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the vehicle drive control method described above.

[0037] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle drive control method described above are implemented.

[0038] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the vehicle drive control method described above are implemented.

[0039] The present application determines the EDD basic target state according to the vehicle operation information corresponding to the vehicle to be controlled, determines the EDD flag according to the vehicle operation information and the EDD basic target state, then determines the initial EDD motor state corresponding to the vehicle to be controlled, and then determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and drives and controls the vehicle to be controlled based on the target EDD motor state. The present application first determines the EDD basic target state according to the vehicle operation information, determines the EDD flag according to the vehicle operation information and the EDD basic target state, and then determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and effectively switches the driving mode of the electric vehicle based on the target EDD motor state, realizing the switching of the electric vehicle between two-wheel drive and four-wheel drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0042] Figure 1This is a flow chart of the first embodiment of the vehicle driving control method of the present application;

[0043] Figure 2 This is a flow chart of a second embodiment of the vehicle driving control method of the present application;

[0044] Figure 3 This is a structural block diagram of the first embodiment of the vehicle driving control device of the present application;

[0045] Figure 4 It is a structural diagram of a vehicle drive control device in a hardware operating environment involved in an embodiment of the present application.

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0048] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0049] The main solution of the embodiment of the present application is: determine the EDD basic target state according to the vehicle operation information corresponding to the vehicle to be controlled, and determine the EDD flag according to the vehicle operation information and the EDD basic target state; determine the initial EDD motor state corresponding to the vehicle to be controlled; determine the target EDD motor state according to the initial EDD motor state and the EDD flag, and drive control the vehicle to be controlled based on the target EDD motor state.

[0050] Electric vehicles have the advantages of energy saving, high efficiency, low or zero emission, low noise, fast acceleration, and low cost of use. The electric vehicle market is growing, and various OEMs have begun to develop electric vehicles. When electric vehicles are equipped with a drive motor and an electronic disconnect differential on the front and rear axles, they can achieve two-wheel drive and four-wheel drive functions. Two-wheel drive electric vehicles have the advantages of low energy consumption and long endurance, while four-wheel drive electric vehicles have the advantages of strong power and strong ability to escape from extreme roads.

[0051] The present application determines the EDD basic target state according to the vehicle operation information corresponding to the vehicle to be controlled, determines the EDD flag according to the vehicle operation information and the EDD basic target state, then determines the initial EDD motor state corresponding to the vehicle to be controlled, and then determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and drives and controls the vehicle to be controlled based on the target EDD motor state. The present application first determines the EDD basic target state according to the vehicle operation information, determines the EDD flag according to the vehicle operation information and the EDD basic target state, and then determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and effectively switches the driving mode of the electric vehicle based on the target EDD motor state, realizing the switching of the electric vehicle between two-wheel drive and four-wheel drive.

[0052] It should be noted that the execution entity of the present application may be an electronic control unit (Vehicle control unit, VCU).

[0053] Based on this, the embodiment of the present application provides a vehicle driving control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the vehicle driving control method of the present application.

[0054] In this embodiment, the vehicle driving control method includes the following steps:

[0055] Step S10: determining an EDD basic target state according to vehicle operation information corresponding to the vehicle to be controlled, and determining an EDD flag according to the vehicle operation information and the EDD basic target state.

[0056] It can be understood that the vehicle to be controlled refers to a vehicle that needs to be driven and controlled, that is, a vehicle that switches between two-wheel drive and four-wheel drive states, and the vehicle operation information refers to the information generated by the vehicle to be controlled during operation, such as vehicle speed, battery power, vehicle status and other information.

[0057] It should be understood that the Electronic Disconnect Differential (EDD) can determine the EDD basic target state based on the vehicle operating information, and the EDD basic target state may include a two-wheel drive state and a four-wheel drive state. The EDD flag can be determined based on the vehicle operating information and the EDD basic target state, and the EDD flag may include an EDD speed flag, an EDD state change stop flag, and an EDD torque flag, all of which can be reset or set.

[0058] Step S20: Determine the initial EDD motor state corresponding to the vehicle to be controlled.

[0059] It is understandable that the initial EDD motor state may be the EDD motor state at the last moment, for example, the disconnected state, the two-wheel drive state, etc.

[0060] Step S30: determining a target EDD motor state according to the initial EDD motor state and the EDD flag, and driving and controlling the vehicle to be controlled based on the target EDD motor state.

[0061] It should be understood that the target EDD motor state refers to the next moment corresponding to the initial EDD motor state, which can be the EDD motor state at the current moment, and the vehicle to be controlled is driven based on the target EDD motor state, and the two-wheel drive / four-wheel drive state switching of the vehicle to be controlled can be realized.

[0062] This embodiment determines the EDD basic target state according to the vehicle operation information corresponding to the vehicle to be controlled, determines the EDD flag according to the vehicle operation information and the EDD basic target state, then determines the initial EDD motor state corresponding to the vehicle to be controlled, and then determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and drives and controls the vehicle to be controlled based on the target EDD motor state. This embodiment first determines the EDD basic target state according to the vehicle operation information, and determines the EDD flag according to the vehicle operation information and the EDD basic target state, then determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and effectively switches the driving mode of the electric vehicle based on the target EDD motor state, thereby realizing the switching of the two-wheel drive or four-wheel drive state of the electric vehicle.

[0063] refer to Figure 2 , Figure 2 This is a flow chart of the second embodiment of the vehicle driving control method of the present application.

[0064] Based on the above first embodiment, in this embodiment, step S10 includes:

[0065] Step S101: determining a four-wheel drive first flag and a four-wheel drive second flag according to vehicle operation information corresponding to the vehicle to be controlled, and determining an EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag.

[0066] Furthermore, in order to accurately determine the basic target state of EDD, in the present embodiment, the step S101 includes: determining the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle operation information corresponding to the vehicle to be controlled; if the four-wheel drive second flag is reset, the basic target state of EDD is the two-wheel drive state; when the four-wheel drive second flag is in position, if the driving mode corresponding to the vehicle to be controlled is the off-road mode, or the driving mode is the road mode and the four-wheel drive first flag is in position, the basic target state of EDD is the four-wheel drive state.

[0067] It is understandable that the four-wheel drive first flag and the four-wheel drive second flag can be determined according to the vehicle operation information. If the four-wheel drive second flag is reset, the EDD basic target state is the two-wheel drive state.

[0068] It should be understood that when the second flag position of the four-wheel drive is in position, if the driving mode corresponding to the vehicle to be controlled is off-road mode (i.e. desert mode, or wading mode, or rock mode, or snow mode, or mud mode), or the driving mode is road mode (i.e. normal mode, or ECO mode, or Sport mode) and the first flag position of the four-wheel drive is in position, the basic target state of the EDD is the four-wheel drive state.

[0069] Furthermore, in order to accurately determine the four-wheel drive first flag and the four-wheel drive second flag, in the present embodiment, the step of determining the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle operation information corresponding to the vehicle to be controlled specifically includes: obtaining the current battery power, target battery power and current vehicle speed in the vehicle operation information corresponding to the vehicle to be controlled; calculating the power difference between the current battery power and the target battery power, and determining the power threshold according to the power difference and the current vehicle speed; when the driver's required power is greater than or equal to the power threshold, or the driver's required torque is greater than or equal to the first preset threshold, setting the four-wheel drive first flag; when the vehicle state is a high-voltage state or a ready state, and the actual EDD state is a non-error state, setting the four-wheel drive second flag.

[0070] It is understandable that the vehicle operation information may include the current battery power, the target battery power and the current vehicle speed, the current battery power refers to the battery power at the current moment, the target battery power refers to the final battery power of the vehicle to be controlled, and the current vehicle speed refers to the vehicle speed at the current moment. The power difference between the current battery power and the target battery power is calculated, and the power threshold is obtained by looking up Table 1 according to the power difference and the current vehicle speed.

[0071] Table 1:

[0072]

[0073]

[0074] It should be understood that when the driver's required power is greater than or equal to the power threshold, or the driver's required torque / maximum allowable torque at the front axle driving end is greater than or equal to the first preset threshold, the four-wheel drive first flag position is set, otherwise, the four-wheel drive first flag position is reset.

[0075] In a specific implementation, when the vehicle state is a high-voltage state or a ready state, and the actual EDD state is a non-error state, the four-wheel drive second flag is set, otherwise, the four-wheel drive second flag is reset.

[0076] Step S102: Determine an EDD flag according to the EDD basic target state and the vehicle operation information, wherein the EDD flag includes: an EDD speed flag, an EDD state change stop flag, and an EDD torque flag.

[0077] Furthermore, in order to effectively obtain the EDD flag, in the present embodiment, the step S102 includes: calculating the rear axle differential input shaft speed according to the current vehicle speed, rear axle gearbox ratio and tire diameter in the vehicle operation information; calculating the absolute value of the speed difference between the rear axle differential input shaft speed and the rear axle motor speed, and when the absolute value is less than or equal to the second preset threshold, setting the EDD speed flag position; when the EDD basic target state is equal to the actual EDD state, setting the EDD state change stop flag position; when the absolute value of the actual torque of the rear axle motor in the vehicle operation information is less than or equal to the third preset threshold, setting the EDD torque flag position.

[0078] It can be understood that the rear axle differential input shaft speed = current vehicle speed * rear axle gearbox speed ratio / (0.06 * 3.14 * tire diameter). When the absolute value of (rear axle differential input shaft speed - rear axle motor speed) is less than or equal to the second preset threshold, the EDD speed flag is set, otherwise, the EDD speed flag is reset.

[0079] It should be understood that when the EDD basic target state is equal to the actual EDD state, the EDD state change stop flag is set, otherwise, the EDD state change stop flag is reset. The actual EDD state refers to the EDD state of the vehicle to be controlled under actual conditions.

[0080] In a specific implementation, when the absolute value of the actual torque of the rear axle motor is less than or equal to the third preset threshold, the EDD torque flag is set, otherwise, the EDD torque flag is reset.

[0081] Furthermore, in order to accurately obtain the target EDD motor state, in the present embodiment, the step of determining the target EDD motor state according to the initial EDD motor state and the EDD flag bit specifically includes: when the initial EDD motor state is a four-wheel drive state, if the EDD state change stop flag bit in the EDD flag bit is reset or the actual EDD state is a two-wheel drive state, then the target EDD motor state is a reduced torque state; when the initial EDD motor state is a reduced torque state, if the EDD state change stop flag bit is reset and the EDD torque flag bit in the EDD flag bit is set, then the target EDD motor state is a disconnected state; when the initial EDD motor state is a disconnected state When in the on state, if the actual EDD state is a two-wheel drive state, the target EDD motor state is a two-wheel drive state; when the initial EDD motor state is a two-wheel drive state, if the EDD state change stop flag is reset or the actual EDD state is a four-wheel drive state, the target EDD motor state is a speed regulation state; when the initial EDD motor state is a speed regulation state, if the EDD state change stop flag is reset and the EDD speed flag in the EDD flag is set, the target EDD motor state is an engaged state; when the initial EDD motor state is an engaged state, if the actual EDD state is a four-wheel drive state, the target EDD motor state is a four-wheel drive state.

[0082] It is understandable that the initial EDD motor state and the target EDD motor state in this embodiment can both include six states, namely, four-wheel drive state, torque reduction state, disconnected state, two-wheel drive state, speed regulation state, and engaged state. When the vehicle is powered on and initialized, the initial EDD motor state can be the two-wheel drive state.

[0083] In the specific implementation, state 1 (EDD motor state is "four-wheel drive state"): output: EDD request disconnect flag is 0 (EDD is not disconnected, the same below); when the EDD state change stop flag is reset, or the actual EDD state is "two-wheel drive state", the EDD motor state jumps to "reduced torque state", otherwise, the EDD motor state remains unchanged at "four-wheel drive state".

[0084] State 2 (EDD motor state is "reduced torque state"): Output: EDD request disconnect flag is 0; when the EDD state changes and the stop flag is in position, the EDD motor state jumps to the "four-wheel drive state", otherwise the following judgment is performed: If the EDD torque flag is in position, the output EDD motor state is "disconnected state", otherwise, the EDD motor state remains unchanged at "reduced torque state".

[0085] State 3 (EDD motor state is "disconnected state"): Output: EDD request disconnect flag is 1 (EDD disconnected, the same below); when the actual EDD state is "two-drive state", the EDD motor state jumps to "two-drive state", otherwise, the EDD motor state remains unchanged as "disconnected state".

[0086] State 4 (EDD motor state is "two-wheel drive state"): Output: EDD request disconnect flag is 1; when the EDD state change stop flag is reset, or the actual EDD state is "four-wheel drive state", the EDD motor state jumps to "speed regulation state", otherwise, the EDD motor state remains unchanged at "two-wheel drive state".

[0087] State 5 (EDD motor state is "speed regulation state"): Output: EDD request disconnect flag is 1; when the EDD state changes and the stop flag is set, the EDD motor state jumps to the "two-wheel drive state", otherwise the following judgment is performed: If the EDD speed flag is set, the EDD motor state jumps to the "engagement state", otherwise, the EDD motor state remains unchanged at the "speed regulation state".

[0088] State 6 (EDD motor state is "engaged state"): Output: EDD request disconnect flag is 0; when the actual EDD state is "four-wheel drive state", the EDD motor state jumps to "four-wheel drive state", otherwise, the EDD motor state remains unchanged as "engaged state".

[0089] This embodiment determines the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle operation information corresponding to the vehicle to be controlled, and determines the EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag, and then determines the EDD flag according to the EDD basic target state and the vehicle operation information. The EDD flag includes: EDD speed flag, EDD state change stop flag, and EDD torque flag. This embodiment determines the EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag, and then determines the EDD flag according to the EDD basic target state and the vehicle operation information, so that an accurate EDD flag can be obtained.

[0090] Reference Figure 3 , Figure 3 This is a structural block diagram of the first embodiment of the vehicle driving control device of the present application.

[0091] like Figure 3 As shown, the vehicle driving control device proposed in the embodiment of the present application includes:

[0092] A flag determination module 10, for determining an EDD basic target state according to vehicle operation information corresponding to the vehicle to be controlled, and determining an EDD flag according to the vehicle operation information and the EDD basic target state;

[0093] A state determination module 20, used to determine an initial EDD motor state corresponding to the vehicle to be controlled;

[0094] The driving control module 30 is used to determine a target EDD motor state according to the initial EDD motor state and the EDD flag, and to drive and control the vehicle to be controlled based on the target EDD motor state.

[0095] This embodiment determines the EDD basic target state according to the vehicle operation information corresponding to the vehicle to be controlled, determines the EDD flag according to the vehicle operation information and the EDD basic target state, then determines the initial EDD motor state corresponding to the vehicle to be controlled, and then determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and drives and controls the vehicle to be controlled based on the target EDD motor state. This embodiment first determines the EDD basic target state according to the vehicle operation information, and determines the EDD flag according to the vehicle operation information and the EDD basic target state, then determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and effectively switches the driving mode of the electric vehicle based on the target EDD motor state, realizing the switching of the two-wheel drive or four-wheel drive state of the electric vehicle.

[0096] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present application. In practical applications, technicians in this field can select part or all of it according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0097] In addition, for technical details that are not described in detail in this embodiment, please refer to the vehicle drive control method provided in any embodiment of the present application, and will not be repeated here.

[0098] Based on the above-mentioned first embodiment of the vehicle drive control device of the present application, a second embodiment of the vehicle drive control device of the present application is proposed.

[0099] In this embodiment, the flag determination module 10 is also used to determine the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle operation information corresponding to the vehicle to be controlled, and determine the EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag; determine the EDD flag according to the EDD basic target state and the vehicle operation information, and the EDD flag includes: EDD speed flag, EDD state change stop flag and EDD torque flag.

[0100] Furthermore, the flag determination module 10 is also used to determine the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle operation information corresponding to the vehicle to be controlled; if the four-wheel drive second flag is reset, the EDD basic target state is the two-wheel drive state; when the four-wheel drive second flag is in position, if the driving mode corresponding to the vehicle to be controlled is the off-road mode, or the driving mode is the road mode and the four-wheel drive first flag is in position, the EDD basic target state is the four-wheel drive state.

[0101] Furthermore, the flag determination module 10 is also used to obtain the current battery power, target battery power and current vehicle speed in the vehicle operation information corresponding to the vehicle to be controlled; calculate the power difference between the current battery power and the target battery power, and determine the power threshold based on the power difference and the current vehicle speed; when the driver's required power is greater than or equal to the power threshold, or the driver's required torque is greater than or equal to the first preset threshold, the four-wheel drive first flag is set; when the vehicle state is a high-voltage state or a ready state, and the actual EDD state is a non-error state, the four-wheel drive second flag is set.

[0102] Furthermore, the flag determination module 10 is also used to calculate the rear axle differential input shaft speed based on the current vehicle speed, rear axle gearbox ratio and tire diameter in the vehicle operation information; calculate the absolute value of the speed difference between the rear axle differential input shaft speed and the rear axle motor speed, and when the absolute value is less than or equal to a second preset threshold, set the EDD speed flag to the position; when the EDD basic target state is equal to the actual EDD state, set the EDD state change stop flag to the position; when the absolute value of the actual torque of the rear axle motor in the vehicle operation information is less than or equal to a third preset threshold, set the EDD torque flag to the position.

[0103] Furthermore, the drive control module 30 is also used for, when the initial EDD motor state is in the four-wheel drive state, if the EDD state change stop flag in the EDD flag is reset or the actual EDD state is in the two-wheel drive state, the target EDD motor state is in the torque reduction state; when the initial EDD motor state is in the torque reduction state, if the EDD state change stop flag is reset and the EDD torque flag in the EDD flag is set, the target EDD motor state is in the disconnected state; when the initial EDD motor state is in the disconnected state, if the actual EDD state is in the two-wheel drive state, the target EDD motor state is in the torque reduction state. The EDD motor state is a two-wheel drive state; when the initial EDD motor state is a two-wheel drive state, if the EDD state change stop flag is reset or the actual EDD state is a four-wheel drive state, the target EDD motor state is a speed regulation state; when the initial EDD motor state is a speed regulation state, if the EDD state change stop flag is reset and the EDD speed flag in the EDD flag is set, the target EDD motor state is an engaged state; when the initial EDD motor state is an engaged state, if the actual EDD state is a four-wheel drive state, the target EDD motor state is a four-wheel drive state.

[0104] Other embodiments or specific implementations of the vehicle drive control device of the present application can refer to the above-mentioned method embodiments and will not be repeated here.

[0105] The present application provides a vehicle drive control device, which includes: at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle drive control method in the above-mentioned embodiment one.

[0106] Reference below Figure 4 , which shows a schematic diagram of the structure of a vehicle drive control device suitable for implementing an embodiment of the present application. The vehicle drive control device in the embodiment of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The vehicle driving control device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0107] like Figure 4 As shown, the vehicle drive control device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the vehicle drive control device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle drive control device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a vehicle drive control device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided alternatively.

[0108] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0109] The vehicle drive control device provided by the present application adopts the vehicle drive control method in the above embodiment, which can solve the technical problem of how to effectively switch the drive mode of the electric vehicle. Compared with the prior art, the beneficial effects of the vehicle drive control device provided by the present application are the same as the beneficial effects of the vehicle drive control method provided by the above embodiment, and the other technical features in the vehicle drive control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0110] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0112] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the vehicle driving control method in the above-mentioned embodiment.

[0113] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0114] The computer-readable storage medium may be included in the vehicle driving control device; or may exist independently without being assembled into the vehicle driving control device.

[0115] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the vehicle drive control device, the vehicle drive control device: determines the EDD basic target state according to the vehicle operation information corresponding to the vehicle to be controlled, and determines the EDD flag according to the vehicle operation information and the EDD basic target state; determines the initial EDD motor state corresponding to the vehicle to be controlled; determines the target EDD motor state according to the initial EDD motor state and the EDD flag, and drives and controls the vehicle to be controlled based on the target EDD motor state.

[0116] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0117] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0118] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0119] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned vehicle drive control method, and can solve the technical problem of how to effectively switch the drive mode of the electric vehicle. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the vehicle drive control method provided in the above-mentioned embodiment, and will not be repeated here.

[0120] The present application also provides a computer program product, including a computer program, which implements the steps of the vehicle driving control method as described above when executed by a processor.

[0121] The computer program product provided by the present application can solve the technical problem of how to effectively switch the driving mode of an electric vehicle. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the vehicle driving control method provided by the above embodiment, which will not be repeated here.

[0122] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle driving control method, characterized in that: The vehicle driving control method comprises the following steps: Determine an EDD basic target state according to vehicle operation information corresponding to the vehicle to be controlled, and determine an EDD flag according to the vehicle operation information and the EDD basic target state; Determining an initial EDD motor state corresponding to the vehicle to be controlled; A target EDD motor state is determined according to the initial EDD motor state and the EDD flag, and the vehicle to be controlled is driven based on the target EDD motor state.

2. The vehicle driving control method according to claim 1, characterized in that: The step of determining the EDD basic target state according to the vehicle operation information corresponding to the vehicle to be controlled, and determining the EDD flag according to the vehicle operation information and the EDD basic target state specifically includes: Determine a four-wheel drive first flag and a four-wheel drive second flag according to vehicle operation information corresponding to the vehicle to be controlled, and determine an EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag; An EDD flag is determined according to the EDD basic target state and the vehicle operation information, and the EDD flag includes: an EDD speed flag, an EDD state change stop flag, and an EDD torque flag.

3. The vehicle driving control method according to claim 2, characterized in that: The step of determining the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle operation information corresponding to the vehicle to be controlled, and determining the EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag, specifically includes: Determine a four-wheel drive first flag position and a four-wheel drive second flag position according to vehicle operation information corresponding to the vehicle to be controlled; If the four-wheel drive second flag is reset, the EDD basic target state is the two-wheel drive state; When the four-wheel drive second flag is in position, if the driving mode corresponding to the vehicle to be controlled is the off-road mode, or the driving mode is the road mode and the four-wheel drive first flag is in position, the EDD basic target state is the four-wheel drive state.

4. The vehicle driving control method according to claim 3, characterized in that: The step of determining the four-wheel drive first flag position and the four-wheel drive second flag position according to the vehicle operation information corresponding to the vehicle to be controlled specifically includes: Obtain the current battery power, target battery power and current vehicle speed from the vehicle operation information corresponding to the vehicle to be controlled; Calculating the power difference between the current battery power and the target battery power, and determining a power threshold value according to the power difference and the current vehicle speed; When the power required by the driver is greater than or equal to the power threshold, or the torque required by the driver is greater than or equal to the first preset threshold, setting the first flag position of the four-wheel drive; When the vehicle state is in high pressure state or ready state, and the actual EDD state is in non-error state, the four-wheel drive second flag is set.

5. The vehicle driving control method according to claim 2, characterized in that: The step of determining the EDD flag according to the EDD basic target state and the vehicle operation information specifically includes: Calculating the input shaft speed of the rear axle differential according to the current vehicle speed, the rear axle gearbox speed ratio and the tire diameter in the vehicle operation information; Calculating an absolute value of a speed difference between a speed of the input shaft of the rear axle differential and a speed of the rear axle motor, and setting an EDD speed flag when the absolute value is less than or equal to a second preset threshold; When the EDD basic target state is equal to the actual EDD state, the EDD state change stop flag is set; When the absolute value of the actual torque of the rear axle motor in the vehicle operation information is less than or equal to the third preset threshold, the EDD torque flag is set.

6. The vehicle driving control method according to any one of claims 1 to 5, characterized in that: The step of determining the target EDD motor state according to the initial EDD motor state and the EDD flag bit specifically includes: When the initial EDD motor state is the four-wheel drive state, if the EDD state change stop flag in the EDD flag is reset or the actual EDD state is the two-wheel drive state, the target EDD motor state is the torque reduction state; When the initial EDD motor state is in the torque reduction state, if the EDD state change stop flag is reset and the EDD torque flag in the EDD flag is set, the target EDD motor state is in the disconnected state; When the initial EDD motor state is the disconnected state, if the actual EDD state is the two-wheel drive state, the target EDD motor state is the two-wheel drive state; When the initial EDD motor state is a two-wheel drive state, if the EDD state change stop flag is reset or the actual EDD state is a four-wheel drive state, the target EDD motor state is a speed regulation state; When the initial EDD motor state is the speed regulating state, if the EDD state change stop flag is reset and the EDD speed flag in the EDD flag is set, the target EDD motor state is the engaged state; When the initial EDD motor state is the engaged state, if the actual EDD state is the four-wheel drive state, the target EDD motor state is the four-wheel drive state.

7. A vehicle driving control device, characterized in that: The vehicle driving control device comprises: A flag determination module, used to determine an EDD basic target state according to vehicle operation information corresponding to the vehicle to be controlled, and determine an EDD flag according to the vehicle operation information and the EDD basic target state; A state determination module, used to determine an initial EDD motor state corresponding to the vehicle to be controlled; A drive control module is used to determine a target EDD motor state according to the initial EDD motor state and the EDD flag, and to drive and control the vehicle to be controlled based on the target EDD motor state.

8. A vehicle driving control device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle driving control method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle driving control method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the vehicle driving control method according to any one of claims 1 to 6 are implemented.

Images