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

Abstract

The application belongs to the technical field of electric vehicles, and discloses a vehicle driving control method, device, equipment, storage medium and product. An EDD basic target state is determined according to vehicle running information corresponding to a vehicle to be controlled, an EDD flag bit is determined according to the vehicle running information and the EDD basic target state, an initial EDD motor state corresponding to the vehicle to be controlled is determined, a target EDD motor state is determined according to the initial EDD motor state and the EDD flag bit, and the vehicle to be controlled is driven and controlled based on the target EDD motor state. 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.

Description

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 surface 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 to-be-controlled vehicle, 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 to-be-controlled vehicle;

[0007] 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.

[0008] Optionally, the step of determining the EDD basic target state according to the vehicle running information corresponding to the to-be-controlled vehicle, 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 to-be-controlled vehicle, 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] determining the EDD flag bit according to the EDD basic target state and the vehicle running information, the EDD flag bit comprising 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 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 determining the EDD basic target state according to the four-wheel drive first flag and the four-wheel drive second flag, specifically comprises:

[0012] 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;

[0013] if the four-wheel drive second flag 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 highway mode and the four-wheel drive first flag is set, when the four-wheel drive second flag is set, the EDD basic target state is a four-wheel drive state.

[0015] Optionally, 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:

[0016] 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;

[0017] 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;

[0018] 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 a first preset threshold;

[0019] setting the four-wheel drive second flag when the whole 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 according to the EDD basic target state and the vehicle running information, specifically comprises:

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

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

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

[0024] The EDD torque flag bit 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.

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

[0026] 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.

[0027] 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.

[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 bit 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 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.

[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 bit determination 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 bit according to the vehicle operation information and the EDD basic target state;

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

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

[0036] In addition, to achieve the above object, the 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.

[0037] In addition, to achieve the above object, the 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.

[0038] In addition, to achieve the above object, the 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.

[0039] The 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 drives controls the vehicle to be controlled based on the target EDD motor state. The 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 in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification.

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced hereinafter. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative work.

[0042] Figure 1A flowchart of a first embodiment of a vehicle drive control method of the present application;

[0043] Figure 2 A flowchart of a second embodiment of a vehicle drive control method of the present application;

[0044] Figure 3 A structural block diagram of a first embodiment of a vehicle drive control device of the present application;

[0045] Figure 4 A structural diagram of a vehicle drive control device of the present application, which is a hardware running environment involved in the embodiment scheme.

[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 embodiment of the present application is: 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; 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 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 functions of two-wheel drive and four-wheel drive of the electric vehicle can be realized. 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 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 an EDD basic target state according to vehicle running information, determines an EDD flag bit 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 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 embodiment provides a vehicle driving control method, referring to Figure 1 , Figure 1 The flowchart of the first embodiment of the vehicle driving control method of the application is shown in the figure.

[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, vehicle state, etc.

[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 time point, for example, 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, and the driving control of 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, then 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, then 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, realizing the two-wheel drive or four-wheel drive state switching of the electric vehicle.

[0063] Reference Figure 2 , Figure 2 The flowchart of the second embodiment of the vehicle driving control method of the application is shown.

[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]

[0073]

[0074] It should be understood that 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, the four-wheel drive first flag is set, otherwise, the four-wheel drive first flag is reset.

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

[0076] 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.

[0077] Further, in order to effectively obtain the EDD flag bits, in the embodiment, the step S102 includes: calculating the rear axle differential input shaft speed according to the current vehicle speed, the rear axle gearbox speed ratio and the tire diameter in the vehicle running information; calculating the absolute value of the speed difference between the rear axle differential input shaft speed and the 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 the actual EDD state; setting the EDD torque flag bit to be on when the absolute value of the rear axle motor actual torque in the vehicle running information is less than or equal to a third preset threshold.

[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). The EDD speed flag bit is set to be on 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, otherwise, the EDD speed flag bit is reset.

[0079] 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, and the actual EDD state refers to the EDD state of the vehicle to be controlled under actual conditions.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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 unchanged as the "four-wheel drive state".

[0084] 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 next step is performed: if the EDD torque flag bit is set, the EDD motor state is output as the "disconnection state", otherwise, the EDD motor state remains unchanged as the "torque reduction state".

[0085] State 3 (EDD motor state is "disconnected state"): output: EDD request disconnect flag bit is 1 (EDD disconnect, 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".

[0086] State 4 (EDD motor state is "two-wheel drive state"): output: EDD request disconnect flag bit is 1; when the EDD state change stop flag bit 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".

[0087] State 5 (EDD motor state is "speed regulation state"): output: EDD request disconnect flag bit is 1; when the EDD state change stop flag bit is set, the EDD motor state jumps to "two-wheel drive state", otherwise, the next step is judged: if the EDD speed flag bit is set, the EDD motor state jumps to "engaged state", otherwise, the EDD motor state remains "speed regulation state".

[0088] State 6 (EDD motor state is "engaged state"): output: EDD request disconnect flag bit 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".

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

[0090] Referring to Figure 3 , Figure 3 is a structural block diagram of the first embodiment of the vehicle drive control device.

[0091] As Figure 3 shown, the vehicle drive control device provided by the embodiment includes:

[0092] The flag bit determination 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 bit according to the vehicle running information and the EDD basic target state.

[0093] a state determining module 20, configured to determine an initial EDD motor state corresponding to the vehicle to be controlled according to the vehicle running information corresponding to the vehicle to be controlled;

[0094] a driving control module 30, 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.

[0095] The embodiment determines an EDD basic target state according to the vehicle running information corresponding to the vehicle to be controlled, determines an EDD flag bit 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 bit, and performs driving control on the vehicle to be controlled based on the target EDD motor state. The embodiment determines an EDD basic target state according to the vehicle running information, determines an EDD flag bit 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 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.

[0096] It should be noted that the above-described workflow is merely illustrative and does not limit the protection scope of the present application. In actual application, a person skilled in the art can select part or all of the above-described workflow to achieve the purpose of the embodiment, which is not limited herein.

[0097] In addition, technical details not described in the embodiment can be referred to the vehicle driving control method provided by any embodiment of the present application, which will not be described herein.

[0098] Based on the first embodiment of the vehicle driving control device described above, the second embodiment of the vehicle driving control device is provided.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] Other embodiments or specific implementations of the vehicle drive control apparatus of the present application can refer to the above-mentioned method embodiments, which will not be described here.

[0105] The present application provides a vehicle drive control device, comprising: at least one processor; and a memory in communication connection with the at least one processor; 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 Embodiment I.

[0106] Reference will now be made to the following description Figure 4 which shows a structural schematic diagram of a vehicle drive control device suitable for implementing embodiments of the present application. The vehicle drive control device in 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 Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. Figure 4 The vehicle drive control device shown is merely an example and should not impose any limitation on the functions and use range of embodiments of the present application.

[0107] AsFigure 4 As shown, the vehicle drive control device 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 device 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 device to communicate wirelessly or by wire with other devices to exchange data. Although the vehicle drive control device having various systems is shown in the figure, it should be understood that all of the systems shown are not required to be implemented or possessed. More or less systems can be alternatively implemented or possessed.

[0108] 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 the 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.

[0109] The vehicle drive control device 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 device 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 device are the same as the features disclosed in the above embodiments, which will not be repeated here.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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).

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[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 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.

[0122] 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 specification and drawings are included in the patent protection scope of the present application.

Claims

1. A vehicle drive control method, characterized in that, The vehicle drive control method includes the following steps: The first and second four-wheel drive flags are determined based on the vehicle operation information corresponding to the vehicle to be controlled, and the basic target state of EDD is determined based on the first and second four-wheel drive flags. The EDD flag bits are determined based on the EDD basic target state and the vehicle operation information. The EDD flag bits include: EDD speed flag bit, EDD state change stop flag bit, and EDD torque flag bit. Determine the initial EDD motor state corresponding to the vehicle to be controlled; The target EDD motor state is determined based on the initial EDD motor state and the EDD flag, and the drive control of the vehicle to be controlled is performed based on the target EDD motor state.

2. The vehicle drive control method as described in claim 1, characterized in that, The steps of determining the first and second four-wheel drive marker positions based on the vehicle operation information corresponding to the vehicle to be controlled, and determining the basic target state of EDD based on the first and second four-wheel drive marker positions, specifically include: Determine the first and second four-wheel drive marker positions based on the vehicle operation information corresponding to the vehicle to be controlled. If the second flag of the four-wheel drive is reset, the basic target state of EDD is the two-wheel drive state; When the second four-wheel drive indicator is in position, if the driving mode corresponding to the vehicle to be controlled is off-road mode, or the driving mode is highway mode and the first four-wheel drive indicator is in position, then the basic target state of EDD is four-wheel drive.

3. The vehicle drive control method as described in claim 2, characterized in that, The steps of determining the first and second four-wheel drive marker positions based on the vehicle operation information corresponding to the vehicle to be controlled specifically include: Obtain the current battery level, target battery level, and current vehicle speed from the vehicle operation information corresponding to the vehicle to be controlled; Calculate the power difference between the current battery level and the target battery level, 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 position will be set. When the vehicle is in a high-pressure or ready state, and the actual EDD state is not an error state, set the second four-wheel drive marker position.

4. The vehicle drive control method as described in claim 1, characterized in that, The step of determining the EDD flag bit based on the EDD basic target state and the vehicle operation information specifically includes: The speed of the rear axle differential input shaft is calculated based on the current vehicle speed, rear axle transmission ratio, and tire diameter in the vehicle operation information. Calculate the absolute value of the speed difference between the input shaft speed of the rear axle differential and the speed of the rear axle motor, and set the EDD speed flag when the absolute value is less than or equal to a second preset threshold. When the basic target state of EDD 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 will be set.

5. The vehicle drive control method according to any one of claims 1 to 4, characterized in that, The step of determining the target EDD motor state based on the initial EDD motor state and the EDD flag bit specifically includes: When the initial EDD motor state is four-wheel drive, if the EDD state change stop flag in the EDD flag bit is reset or the actual EDD state is two-wheel drive, then the target EDD motor state is reduced torque. When the initial EDD motor state is in the reduced torque state, if the EDD state change stop flag is reset and the EDD torque flag in the EDD flag is set, then the target EDD motor state is in the off state. When the initial EDD motor state is in the off state, if the actual EDD state is in the two-drive state, then the target EDD motor state is in the two-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, then the target EDD motor state is a speed regulation state. When the initial EDD motor state is in the speed regulation state, if the EDD state change stop flag is reset and the EDD speed flag in the EDD flag is set, then the target EDD motor state is in the engagement state. When the initial EDD motor state is engaged, if the actual EDD state is four-wheel drive, then the target EDD motor state is four-wheel drive.

6. A vehicle drive control device, characterized in that, The vehicle drive control device includes: The flag determination module is used to determine the first four-wheel drive flag and the second four-wheel drive flag based on the vehicle operation information corresponding to the vehicle to be controlled, and to determine the basic target state of EDD based on the first four-wheel drive flag and the second four-wheel drive flag; and to determine the EDD flag based on the basic target state of EDD and the vehicle operation information, wherein the EDD flag includes: EDD speed flag, EDD state change stop flag, and EDD torque flag. The state determination module is used to determine the initial EDD motor state corresponding to the vehicle to be controlled; The drive control module is used to determine the target EDD motor state based on the initial EDD motor state and the EDD flag bit, and to perform drive control on the vehicle to be controlled based on the target EDD motor state.

7. A vehicle drive control device, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle drive control method as described in any one of claims 1 to 5.

8. 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, it implements the steps of the vehicle drive control method as described in any one of claims 1 to 5.

9. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the steps of the vehicle drive control method as described in any one of claims 1 to 5.

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