Vehicle drive control method, apparatus, and device, storage medium, and product

Abstract

A vehicle drive control method, relating to the technical field of electric vehicles. The method comprises: determining an EDD basic target state on the basis of vehicle operation information corresponding to a vehicle to be controlled, and determining EDD flag bits on the basis of the vehicle operation information and the EDD basic target state (S10); determining an initial EDD motor state corresponding to said vehicle (S20); and determining a target EDD motor state on the basis of the initial EDD motor state and the EDD flag bits, and performing drive control on said vehicle on the basis of the target EDD motor state (S30). In the method, first, an EDD basic target state is determined on the basis of vehicle operation information, and EDD flag bits are determined on the basis of the vehicle operation information and the EDD basic target state, then a target EDD motor state is determined on the basis of an initial EDD motor state and the EDD flag bits, and the driving mode of an electric vehicle is effectively switched on the basis of the target EDD motor state, thereby achieving switching between two-wheel drive and four-wheel drive states for the electric vehicle. Further disclosed are a vehicle drive control apparatus, a vehicle drive control device, a storage medium, and a computer program product.

Description

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

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

[0002] Electric vehicles have the advantages of energy saving, high efficiency, low emission or zero emission, low noise, fast acceleration, low use cost and the like. The market of electric vehicles is becoming larger and larger, and various host manufacturers have begun to develop electric vehicles. When an electric vehicle is equipped with one driving motor and an electronic disconnecting differential on the front and rear axles respectively, the electric vehicle can realize two-wheel drive and four-wheel drive functions. The two-wheel drive electric vehicle has the advantages of low energy consumption and long endurance time, and the four-wheel drive electric vehicle has the advantages of strong power and strong limit road escape ability. Therefore, how to effectively switch the driving mode of the electric vehicle becomes a problem to be solved. SUMMARY

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

[0004] To achieve the above-mentioned purpose, the present application provides a vehicle driving control method, which comprises the following steps:

[0005] determining an EDD basic target state according to vehicle running information corresponding to a vehicle to be controlled, and determining an EDD flag bit according to the vehicle running information and the EDD basic target state;

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

[0007] determining a target EDD motor state according to the initial EDD motor state and the EDD flag bit, and driving controlling the vehicle to be controlled based on the target EDD motor state.

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

[0009] determining a four-wheel drive first flag bit and a four-wheel drive second flag bit according to the vehicle running information corresponding to the vehicle to be controlled, and determining the EDD basic target state according to the four-wheel drive first flag bit and the four-wheel drive second flag bit;

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

[0011] Optionally, the step of determining the EDD basic target state according to the four-wheel-drive first flag bit and the four-wheel-drive second flag bit includes:

[0012] The four-wheel-drive first flag bit and the four-wheel-drive second flag bit are determined according to the vehicle running information corresponding to the vehicle to be controlled.

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

[0014] If the driving mode corresponding to the vehicle to be controlled is an off-road mode, or the driving mode is a road mode and the four-wheel-drive first flag bit is set, the EDD basic target state is a four-wheel-drive state when the four-wheel-drive second flag bit is set.

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

[0016] The current battery power, the target battery power and the current vehicle speed in the vehicle running information corresponding to the vehicle to be controlled are obtained.

[0017] The power threshold is determined according to the power difference between the current battery power and the target battery power and the current vehicle speed.

[0018] The four-wheel-drive first flag bit is set when the driver demand power is greater than or equal to the power threshold, or the driver demand torque is greater than or equal to a first preset threshold.

[0019] The four-wheel-drive second flag bit is set when the vehicle state is a high-pressure state or a preparation state, and the actual EDD state is a non-error state.

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

[0021] The rear axle differential input shaft speed is calculated according to the current vehicle speed, the rear axle gearbox speed ratio and the tire diameter in the vehicle running information.

[0022] The absolute value of the speed difference between the rear axle differential input shaft speed and the rear axle motor speed is calculated, and the EDD speed flag bit is set when the absolute value is less than or equal to a second preset threshold.

[0023] setting the EDD state change stop flag to one when the EDD basic target state is equal to the actual EDD state;

[0024] setting the EDD torque flag to one when an absolute value of the rear axle motor actual torque in the vehicle running information is less than or equal to a third preset threshold.

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

[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 the torque reduction state, if the EDD state change stop flag is reset and the EDD torque flag in the EDD flag is set to one, the target EDD motor state is the disconnection state;

[0028] when the initial EDD motor state is the disconnection 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 the two-wheel drive state, if the EDD state change stop flag is reset or the actual EDD state is the four-wheel drive state, the target EDD motor state is the speed regulation state;

[0030] when the initial EDD motor state is the speed regulation state, if the EDD state change stop flag is reset and the EDD speed flag in the EDD flag is set to one, the target EDD motor state is the engagement state;

[0031] when the initial EDD motor state is the engagement 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 object, the application further provides a vehicle driving control device, which comprises:

[0033] a flag determining module, configured to determine an EDD basic target state according to vehicle running information corresponding to a vehicle to be controlled, and determine an EDD flag according to the vehicle running information and the EDD basic target state;

[0034] a state determining module, configured to determine an initial EDD motor state corresponding to the vehicle to be controlled;

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

[0036] In addition, to achieve the above object, the present application further provides a vehicle drive control device, which comprises 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 as described above.

[0037] In addition, to achieve the above object, the present application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the vehicle drive control method as described above.

[0038] In addition, to achieve the above object, the present application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the steps of the vehicle drive control method as described above.

[0039] The present application determines an EDD basic target state according to vehicle running information corresponding to the vehicle to be controlled, determines an EDD flag according to the vehicle running information and the EDD basic target state, determines an initial EDD motor state corresponding to the vehicle to be controlled, determines a target EDD motor state according to the initial EDD motor state and the EDD flag, and performs drive control on the vehicle to be controlled based on the target EDD motor state. The present application determines an EDD basic target state according to vehicle running information, determines an EDD flag according to the vehicle running information and the EDD basic target state, determines a target EDD motor state according to the initial EDD motor state and the EDD flag, and effectively switches the drive mode of the electric vehicle based on the target EDD motor state, so as to realize the two-wheel drive or four-wheel drive state switching of the electric vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings, which are incorporated herein and constitute part of the 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 technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced here. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0042] Fig. 1 is a flowchart of a first embodiment of the vehicle drive control method of the present application;

[0043] Fig. 2 is a flowchart of a second embodiment of the vehicle drive control method of the present application;

[0044] Fig. 3 is a structural block diagram of a first embodiment of the vehicle drive control device of the present application;

[0045] Fig. 4 is a structural diagram of a vehicle drive control device of a hardware operating environment involved in the embodiments of the present application.

[0046] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

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

[0048] In order to better understand the technical solutions of the present application, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments.

[0049] The main solution of the embodiments of the present application is: determining an EDD basic target state according to vehicle operating information corresponding to a to-be-controlled vehicle, and determining an EDD flag bit according to the vehicle operating information and the EDD basic target state; 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 driving controlling the to-be-controlled vehicle based on the target EDD motor state.

[0050] Electric vehicles have the advantages of energy saving, high efficiency, low emission or zero emission, low noise, fast acceleration, low use cost, etc. The market of electric vehicles is becoming larger and larger, and major vehicle manufacturers have begun to develop electric vehicles. When an electric vehicle is equipped with one driving motor and an electronic disconnecting differential on the front and rear axles respectively, the electric vehicle can realize two-wheel drive and four-wheel drive functions. Two-wheel drive electric vehicles have the advantages of low energy consumption and long endurance time, and four-wheel drive electric vehicles have the advantages of strong power and strong limit road surface escape ability.

[0051] The application determines an EDD basic target state according to vehicle running information corresponding to a to-be-controlled vehicle, determines an EDD flag bit according to the vehicle running information and the EDD basic target state, then determines an initial EDD motor state corresponding to the to-be-controlled vehicle, determines a target EDD motor state according to the initial EDD motor state and the EDD flag bit, and drives the to-be-controlled vehicle based on the target EDD motor state. The application determines the EDD basic target state according to the vehicle running information, determines the EDD flag bit according to the vehicle running information and the EDD basic target state, determines the target EDD motor state according to the initial EDD motor state and the EDD flag bit, and effectively switches the driving mode of the electric vehicle based on the target EDD motor state, so as to realize the two-wheel drive or four-wheel drive state switching of the electric vehicle.

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

[0053] Based on this, the application provides a vehicle driving control method, and reference is made to FIG. 1, which is a flowchart of a first embodiment of the vehicle driving control method of the application.

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

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

[0056] It can be understood that the to-be-controlled vehicle refers to a vehicle that needs to be driven and controlled, i.e., a vehicle that switches between two-wheel drive and four-wheel drive states, and the vehicle running information refers to information generated when the to-be-controlled vehicle is running, such as vehicle speed, battery capacity, and vehicle state information.

[0057] It should be understood that the electronic disconnect differential (Electronic Disconnect Differential, EDD) can determine an EDD basic target state according to vehicle running information, the EDD basic target state can include a two-wheel drive state and a four-wheel drive state, and an EDD flag bit can be determined according to the vehicle running information and the EDD basic target state, the EDD flag bit can include an EDD speed flag bit, an EDD state change stop flag bit, and an EDD torque flag bit, and all of them can be reset or set.

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

[0059] It can be understood that the initial EDD motor state can be the EDD motor state at the last moment, such as a disconnected state, a 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 bit, and driving 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 EDD motor state at the next time point corresponding to the initial EDD motor state, which can be the current time point, and driving the vehicle to be controlled based on the target EDD motor state can realize the two-wheel drive / four-wheel drive state switching of the vehicle to be controlled.

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

[0063] Referring to FIG. 2, FIG. 2 is a flowchart of a second embodiment of the vehicle driving control method of the application.

[0064] Based on the above first embodiment, in the present embodiment, the step S10 comprises:

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

[0066] Further, in order to accurately determine the EDD basic target state, in the present embodiment, the step S101 comprises: determining a four-wheel drive first flag bit and a four-wheel drive second flag bit according to the vehicle running information corresponding to the vehicle to be controlled; if the four-wheel drive second flag bit is reset, the EDD basic target state is a two-wheel drive state; when the four-wheel drive second flag bit is set, if the driving mode corresponding to the vehicle to be controlled is an off-road mode, or the driving mode is a highway mode and the four-wheel drive first flag bit is set, the EDD basic target state is a four-wheel drive state.

[0067] It can be understood that the four-wheel drive first flag and the four-wheel drive second flag can be determined according to the vehicle running 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 four-wheel drive second flag is set, if the corresponding driving mode of the vehicle to be controlled is the off-road mode (i.e., the desert mode, or the water mode, or the rock mode, or the snow mode, or the mud mode), or the driving mode is the road mode (i.e., the normal mode, or the ECO mode, or the Sport mode) and the four-wheel drive first flag is set, the EDD basic target state is the four-wheel drive state.

[0069] Further, in order to accurately determine the four-wheel drive first flag and the four-wheel drive second flag, in the embodiment, the step of determining the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle running information corresponding to the vehicle to be controlled specifically comprises: obtaining the current battery power, the target battery power and the current vehicle speed in the vehicle running 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; setting the four-wheel drive first flag when the driver demand power is greater than or equal to the power threshold, or the driver demand torque is greater than or equal to the first preset threshold; setting the four-wheel drive second flag when the whole vehicle state is the high pressure state or the ready state, and the actual EDD state is the non-error state.

[0070] It can be understood that the vehicle running information can 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 time, 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 time. The power difference between the current battery power and the target battery power is calculated, and the power threshold is obtained according to the power difference and the current vehicle speed by referring to Table 1.

[0071] Table 1:

[0072] It should be understood that the four-wheel drive first flag is set when the driver demand power is greater than or equal to the power threshold, or the driver demand torque / maximum allowable front axle driving end torque is greater than or equal to the first preset threshold, otherwise the four-wheel drive first flag is reset.

[0073] In a specific implementation, the four-wheel drive second flag is set when the whole vehicle state is the high pressure state or the ready state, and the actual EDD state is the non-error state, otherwise the four-wheel drive second flag is reset.

[0074] Step S102: determining EDD flag bits according to the EDD basic target state and the vehicle running information, the EDD flag bits including: an EDD speed flag bit, an EDD state change stop flag bit and an EDD torque flag bit.

[0075] Further, in order to effectively obtain the EDD flag bits, in the embodiment, the step S102 includes: calculating a rear axle differential input shaft speed according to a current vehicle speed, a rear axle gearbox speed ratio and a tire diameter in the vehicle running information; calculating an absolute value of a speed difference between the rear axle differential input shaft speed and a rear axle motor speed, and setting the EDD speed flag bit to be on when the absolute value is less than or equal to a second preset threshold; setting the EDD state change stop flag bit to be on when the EDD basic target state is equal to an actual EDD state; and setting the EDD torque flag bit to be on when an absolute value of a rear axle motor actual torque in the vehicle running information is less than or equal to a third preset threshold.

[0076] 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). The EDD speed flag bit is set to be on when an absolute value of (rear axle differential input shaft speed - rear axle motor speed) is less than or equal to the second preset threshold, otherwise, the EDD speed flag bit is reset.

[0077] It should be understood that the EDD state change stop flag bit is set to be on when the EDD basic target state is equal to the actual EDD state, otherwise, the EDD state change stop flag bit is reset, the actual EDD state refers to an EDD state of the vehicle to be controlled under actual conditions.

[0078] In a specific implementation, the EDD torque flag bit is set to be on when the absolute value of the rear axle motor actual torque is less than or equal to the third preset threshold, otherwise, the EDD torque flag bit is reset.

[0079] Further, in order to accurately obtain the target EDD motor state, in the embodiment, the step of determining the target EDD motor state according to the initial EDD motor state and the EDD flag bit specifically comprises: when the initial EDD motor state is the 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 the two-wheel drive state, the target EDD motor state is the torque reduction state; when the initial EDD motor state is the torque reduction state, if the EDD state change stop flag bit is reset and the EDD torque flag bit in the EDD flag bit is set, the target EDD motor state is the disconnection state; when the initial EDD motor state is the disconnection 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 the two-wheel drive state, if the EDD state change stop flag bit is reset or the actual EDD state is the four-wheel drive state, the target EDD motor state is the speed regulation state; when the initial EDD motor state is the speed regulation state, if the EDD state change stop flag bit is reset and the EDD speed flag bit in the EDD flag bit is set, the target EDD motor state is the engagement state; when the initial EDD motor state is the engagement state, if the actual EDD state is the four-wheel drive state, the target EDD motor state is the four-wheel drive state.

[0080] It can be understood that the initial EDD motor state and the target EDD motor state in the embodiment can each include six states, i.e., the four-wheel drive state, the torque reduction state, the disconnection state, the two-wheel drive state, the speed regulation state, and the engagement state. When the whole vehicle is powered on and initialized, the initial EDD motor state can be the two-wheel drive state.

[0081] In a specific implementation, state 1 (the EDD motor state is the four-wheel drive state): output: the EDD request disconnection flag bit is 0 (EDD is not disconnected, the same below); when the EDD state change stop flag bit is reset or the actual EDD state is the two-wheel drive state, the EDD motor state jumps to the torque reduction state, otherwise, the EDD motor state remains the four-wheel drive state unchanged.

[0082] State 2 (the EDD motor state is the torque reduction state): output: the EDD request disconnection flag bit is 0; when the EDD state change stop flag bit is set, the EDD motor state jumps to the four-wheel drive state, otherwise, the following step is performed: if the EDD torque flag bit is set, the output EDD motor state is the disconnection state, otherwise, the EDD motor state remains the torque reduction state unchanged.

[0083] 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-wheel drive state", the EDD motor state jumps to "two-wheel drive state", otherwise, the EDD motor state remains "disconnected state".

[0084] 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 "two-wheel drive state".

[0085] State 5 (EDD motor state is "speed regulation state"): output: EDD request disconnect flag is 1; when the EDD state change stop flag is set, the EDD motor state jumps to "two-wheel drive state", otherwise, the following step is judged: if the EDD speed flag is set, the EDD motor state jumps to "engaged state", otherwise, the EDD motor state remains "speed regulation state".

[0086] 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 "engaged state".

[0087] The embodiment determines the four-wheel drive first flag and the four-wheel drive second flag according to the vehicle running 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 determines the EDD flag according to the EDD basic target state and the vehicle running information. The EDD flag includes: the EDD speed flag, the EDD state change stop flag and the EDD torque flag. The embodiment determines the EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag, and determines the EDD flag according to the EDD basic target state and the vehicle running information, so that the accurate EDD flag can be obtained.

[0088] Referring to FIG. 3, FIG. 3 is a structural block diagram of the vehicle drive control device according to the first embodiment of the application.

[0089] As shown in FIG. 3, the vehicle drive control device according to the embodiment of the application comprises:

[0090] The flag determining module 10 is configured to determine an EDD basic target state according to vehicle running information corresponding to a vehicle to be controlled, and determine an EDD flag according to the vehicle running information and the EDD basic target state.

[0091] The state determining module 20 is configured to determine an initial EDD motor state corresponding to the vehicle to be controlled.

[0092] The driving control module 30 is configured to determine a target EDD motor state according to the initial EDD motor state and the EDD flag bit, and perform driving control on the vehicle to be controlled based on the target EDD motor state.

[0093] In the embodiment, the EDD basic target state is determined according to the vehicle running information corresponding to the vehicle to be controlled, the EDD flag bit is determined according to the vehicle running information and the EDD basic target state, the initial EDD motor state corresponding to the vehicle to be controlled is determined, the target EDD motor state is determined according to the initial EDD motor state and the EDD flag bit, and the driving control is performed on the vehicle to be controlled based on the target EDD motor state. In the embodiment, the EDD basic target state is determined according to the vehicle running information, the EDD flag bit is determined according to the vehicle running information and the EDD basic target state, the target EDD motor state is determined according to the initial EDD motor state and the EDD flag bit, and the driving mode of the electric vehicle is effectively switched based on the target EDD motor state, so that the two-wheel drive or four-wheel drive state of the electric vehicle is switched.

[0094] It should be noted that the above-described workflow is only illustrative and does not limit the protection scope of the present application. In actual applications, a person skilled in the art can select part or all of the above-described workflow to achieve the purpose of the embodiment, and the selection is not limited herein.

[0095] In addition, technical details not described in detail in the embodiment can be referred to the vehicle driving control method provided by any embodiment of the present application, and will not be described herein.

[0096] Based on the first embodiment of the vehicle driving control device described above, the second embodiment of the vehicle driving control device is provided.

[0097] In the embodiment, the flag bit determining module 10 is further configured to determine a four-wheel drive first flag bit and a four-wheel drive second flag bit according to the vehicle running information corresponding to the vehicle to be controlled, and determine an EDD basic target state according to the four-wheel drive first flag bit and the four-wheel drive second flag bit; determine an EDD flag bit according to the EDD basic target state and the vehicle running information, the EDD flag bit including an EDD speed flag bit, an EDD state change stop flag bit, and an EDD torque flag bit.

[0098] Further, the flag determination module 10 is further configured to determine the four-wheel drive first flag and the four-wheel drive second flag according to vehicle running information corresponding to the vehicle to be controlled; if the four-wheel drive second flag is reset, the EDD basic target state is a two-wheel drive state; when the four-wheel drive second flag is set, if the driving mode corresponding to the vehicle to be controlled is an off-road mode, or the driving mode is a highway mode and the four-wheel drive first flag is set, the EDD basic target state is a four-wheel drive state.

[0099] Further, the flag determination module 10 is further configured to obtain a current battery power, a target battery power and a current vehicle speed in the vehicle running information corresponding to the vehicle to be controlled; calculate a power difference between the current battery power and the target battery power, and determine a power threshold according to the power difference and the current vehicle speed; set the four-wheel drive first flag when a driver demand power is greater than or equal to the power threshold, or a driver demand torque is greater than or equal to a first preset threshold; set the four-wheel drive second flag when a whole vehicle state is a high pressure state or a preparation state, and an actual EDD state is a non-error state.

[0100] Further, the flag determination module 10 is further configured to calculate a rear axle differential input shaft speed according to the current vehicle speed, a rear axle gearbox speed ratio and a tire diameter in the vehicle running information; calculate an absolute value of a speed difference between the rear axle differential input shaft speed and a rear axle motor speed, and set an EDD speed flag when the absolute value is less than or equal to a second preset threshold; set an EDD state change stop flag when the EDD basic target state is equal to the actual EDD state; set an EDD torque flag when an absolute value of a rear axle motor actual torque in the vehicle running information is less than or equal to a third preset threshold.

[0101] Further, the drive control module 30 is further configured to: 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 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 the disconnection state; when the initial EDD motor state is the disconnection 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 the two-wheel drive state, if the EDD state change stop flag is reset or the actual EDD state is the four-wheel drive state, the target EDD motor state is the speed regulation state; when the initial EDD motor state is the 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 the engagement state; and when the initial EDD motor state is the engagement state, if the actual EDD state is the four-wheel drive state, the target EDD motor state is the four-wheel drive state.

[0102] Other embodiments or specific implementations of the vehicle drive control apparatus of the present application can refer to the above-mentioned method embodiments, and will not be described here.

[0103] The present application provides a vehicle drive control device, comprising: at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the vehicle drive control method in the above-mentioned embodiment one.

[0104] Reference is made to FIG. 4, which shows a structural schematic diagram of a vehicle drive control device suitable for implementing the embodiments of the present application. The vehicle drive control device in the embodiments of the present application can include, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistant), PADs (Portable Application Description), PMPs (Portable Media Player), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. The vehicle drive control device shown in FIG. 4 is only an example, and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0105] As shown in FIG. 4, the vehicle drive control apparatus can include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes in accordance with a program stored in a read only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. In the RAM 1004, various programs and data required for the operation of the vehicle drive control apparatus are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 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), a speaker, a vibrator, etc.; the 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 apparatus to communicate wirelessly or by wire with other devices to exchange data. Although the vehicle drive control apparatus having various systems is shown in the figure, it should be understood that all of the shown systems are not required to be implemented or possessed. More or less systems can be alternatively implemented or possessed.

[0106] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of embodiments of the present disclosure are performed.

[0107] The vehicle drive control apparatus provided by the present disclosure adopts the vehicle drive control method in the above embodiments, and can solve the technical problem of how to effectively switch the driving mode of an electric vehicle. Compared with the prior art, the vehicle drive control apparatus provided by the present disclosure has the same beneficial effects as the vehicle drive control method provided by the above embodiments, and other technical features in the vehicle drive control apparatus are the same as the features disclosed in the above embodiments, which will not be repeated here.

[0108] It should be understood that various aspects of the disclosure can be implemented in 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 appropriate manner in any one or more embodiments or examples.

[0109] The above description is merely illustrative of the application and is not intended to limit the scope of the application. Any variations and modifications that can be made by any person skilled in the art within the spirit and scope of the application are intended to be encompassed by the application. Therefore, the scope of the application should be determined by the scope of the claims.

[0110] The application provides a computer-readable storage medium having stored thereon computer-readable program instructions (i.e., a computer program) for executing the vehicle drive control method in the above-described embodiments.

[0111] The computer-readable storage medium provided by the application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination thereof. More specific examples of the computer-readable storage medium can include, but are not limited to, an electric connection having one or more conductive 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 appropriate combination thereof. In the present embodiment, the computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium can be transmitted by any appropriate medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), etc., or any appropriate combination thereof.

[0112] The above-described computer-readable storage medium can be included in a vehicle drive control device; or can exist separately without being assembled into the vehicle drive control device.

[0113] The computer readable storage medium described above carries one or more programs, when the one or more programs are executed by the vehicle drive control device, cause the vehicle drive control device to: determine an EDD basic target state according to vehicle operation information corresponding to a to-be-controlled vehicle, and determine an EDD flag according to the vehicle operation information and the EDD basic target state; determine an initial EDD motor state corresponding to the to-be-controlled vehicle; determine a target EDD motor state according to the initial EDD motor state and the EDD flag, and perform drive control on the to-be-controlled vehicle based on the target EDD motor state.

[0114] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can 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 the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0115] The computer program code can also be loaded onto a computer or other programmable information processing apparatus to cause a series of operations to be performed on the computer or other programmable information processing apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable information processing apparatus implement the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0116] The modules described in the embodiments of the present application can be implemented in the form of software or in the form of hardware. In some cases, the names of the modules do not constitute a limitation on the modules themselves.

[0117] The readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e., a computer program) for executing the vehicle driving control method described above, and can solve the technical problem of how to effectively switch the driving mode of an electric vehicle. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the vehicle driving control method provided by the above embodiments, and will not be described here.

[0118] The present application also provides a computer program product comprising a computer program, which, when executed by a processor, implements the steps of the vehicle driving control method as described above.

[0119] 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 computer program product provided by the present application has the same beneficial effects as the vehicle driving control method provided by the above embodiments, and will not be described here.

[0120] The above only describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the present application, and the contents of the present application and the accompanying drawings are included in the patent protection scope of the present application.

Claims

1. A vehicle drive control method characterized by comprising: The vehicle driving control method comprises the following steps: determining an EDD basic target state according to vehicle running information corresponding to a vehicle to be controlled, and determining an EDD flag bit according to the vehicle running information and the EDD basic target state; determining an initial EDD motor state corresponding to the vehicle to be controlled; determining a target EDD motor state according to the initial EDD motor state and the EDD flag bit, and driving the vehicle to be controlled based on the target EDD motor state.

2. The vehicle drive control method according to claim 1, characterized by The step of determining an EDD basic target state according to vehicle running information corresponding to a vehicle to be controlled, and determining an EDD flag bit according to the vehicle running information and the EDD basic target state, specifically comprises: determining a four-wheel drive first flag bit and a four-wheel drive second flag bit according to vehicle running information corresponding to a vehicle to be controlled, and determining an EDD basic target state according to the four-wheel drive first flag bit and the four-wheel drive second flag bit; determining an EDD flag bit according to the EDD basic target state and the vehicle running information, wherein the EDD flag bit comprises an EDD speed flag bit, an EDD state change stop flag bit and an EDD torque flag bit.

3. The vehicle drive control method according to claim 2, characterized by The step of determining a four-wheel drive first flag bit and a four-wheel drive second flag bit according to vehicle running information corresponding to a vehicle to be controlled, and determining an EDD basic target state according to the four-wheel drive first flag bit and the four-wheel drive second flag bit, specifically comprises: determining a four-wheel drive first flag bit and a four-wheel drive second flag bit according to vehicle running information corresponding to a vehicle to be controlled; if the four-wheel drive second flag bit is reset, the EDD basic target state is a two-wheel drive state; if the four-wheel drive second flag bit is set, and the driving mode corresponding to the vehicle to be controlled is an off-road mode, or the driving mode is a road mode and the four-wheel drive first flag bit is set, the EDD basic target state is a four-wheel drive state.

4. The vehicle drive control method according to claim 3, characterized in that, The step of determining a four-wheel drive first flag bit and a four-wheel drive second flag bit according to vehicle running information corresponding to a vehicle to be controlled, specifically comprises: obtaining a current battery capacity, a target battery capacity and a current vehicle speed in the vehicle running information corresponding to the vehicle to be controlled; calculating a capacity difference between the current battery capacity and the target battery capacity, and determining a power threshold according to the capacity difference and the current vehicle speed; setting the four-wheel drive first flag bit when the driver demand power is greater than or equal to the power threshold, or the driver demand torque is greater than or equal to a first preset threshold; setting the four-wheel drive second flag bit when the whole vehicle state is a high pressure state or a preparation state, and the actual EDD state is a non-error state.

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

6. The vehicle drive control method according to any one of claims 1 to 5, characterized by The step of determining the target EDD motor state according to the initial EDD motor state and the EDD flag 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 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 the disconnection state; when the initial EDD motor state is the disconnection 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 the two-wheel drive state, if the EDD state change stop flag is reset or the actual EDD state is the four-wheel drive state, the target EDD motor state is the speed regulation state; when the initial EDD motor state is the 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 the engagement state; when the initial EDD motor state is the engagement 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 drive control device characterized by comprising: The vehicle driving control device includes: a flag determining module configured to determine an EDD basic target state according to vehicle operation information corresponding to a vehicle to be controlled, and determine an EDD flag according to the vehicle operation information and the EDD basic target state; a state determining module configured to determine an initial EDD motor state corresponding to the vehicle to be controlled; a driving control module configured to determine a target EDD motor state according to the initial EDD motor state and the EDD flag, and perform driving control on the vehicle to be controlled based on the target EDD motor state.

8. A vehicle drive control apparatus characterized by comprising: The device includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and 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 by The storage medium is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the vehicle driving control method according to any one of claims 1 to 6.

10. A computer program product, characterised in that, The computer program product includes a computer program, and the computer program is executed by a processor to implement the steps of the vehicle driving control method according to any one of claims 1 to 6.

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