Control method and apparatus for vehicle disconnection apparatus, and electronic device and storage medium

Abstract

A control method and apparatus for a vehicle disconnection apparatus, and an electronic device and a storage medium, which are applied in the technical field of vehicle control. The method comprises: acquiring the current vehicle speed of a vehicle during traveling; on the basis of the current vehicle speed, screening out at least one candidate vehicle control parameter set from among a plurality of pre-stored test vehicle control parameter sets; on the basis of the current traveling situation of the vehicle, screening out a target control parameter set from among the at least one candidate vehicle control parameter set; and on the basis of the target control parameter set, adjusting output parameters of a target electric motor connected to a disconnection apparatus, and when the output parameters of the target electric motor are adjusted to be consistent with parameters in the target control parameter set, in response to a vehicle drive mode switching instruction, controlling the disconnection apparatus to turn on, disconnecting the electric motor of the vehicle from wheels of the vehicle, and switching the drive mode of the vehicle from a four-wheel drive mode to a two-wheel drive mode. The accuracy of disconnection control over a disconnection apparatus can be improved, thereby further prolonging the service life of the disconnection apparatus.

Description

Control method, device, electronic device and storage medium of vehicle disconnect device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202311754194.X filed with the State Intellectual Property Office of China on December 20, 2023, entitled “Control method, device, electronic device and storage medium for vehicle disconnect device,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of vehicle control technology, and in particular to a control method, device, electronic device, and storage medium for a vehicle disconnect device. Background Art

[0004] To improve overall vehicle performance, some vehicles utilize four-wheel drive (4WD). This means that there are at least two powertrains, with at least one of the front or rear wheels driven by an electric motor. Four-wheel drive is required in certain operating conditions (such as hill climbing, high-throttle acceleration, and slippery roads). However, in other operating conditions (such as low speeds, low loads, and urban congestion), operating in a single drive mode can meet customer driving needs. Therefore, it is necessary to control the vehicle's switching between four-wheel drive and two-wheel drive.

[0005] In related technologies, when two-wheel drive can meet driving conditions, since some gears of the reducer rotate with the wheels, there will be a certain drag torque, which will cause the overall efficiency of the drive system to decrease, thereby affecting the cruising range. In order to reduce the above losses and further increase the cruising range of the vehicle, a disconnect device will be added to the reducer.

[0006] Among them, the reliability and durability of the disconnect function of the disconnect device is crucial to the vehicle, and the selection of disconnect strategy control parameters also has a great impact on the durability of the disconnect device. How to accurately select appropriate disconnect strategy control parameters has become an urgent problem to be solved.

[0007] Application Contents

[0008] In view of this, the purpose of the present disclosure is to provide a control method, device, electronic device and storage medium for a vehicle disconnect device, and to screen out a target control parameter group from a plurality of test vehicle control parameter groups whose disconnect response time and disconnect noise of the disconnect device meet preset disconnect control conditions according to the current vehicle speed, and to adjust the output parameters of the target motor through the target control parameter group to perform disconnection control of the disconnect device, and to accurately select the control parameter group for controlling the disconnect device, to ensure that the response time of the disconnect device is the shortest and the disconnect noise is the lowest when the disconnect device is disconnected, which helps to improve the accuracy of the disconnection control of the disconnect device and further improves the service life of the disconnect device.

[0009] In a first aspect, an optional embodiment of the present disclosure provides a method for controlling a vehicle disconnect device, wherein the vehicle disconnect device is disposed at the end of a transmission system of the vehicle; the disconnect device is used to disconnect or connect a connection between a motor of the vehicle and a wheel of the vehicle; the control method comprises:

[0010] Get the current speed of the vehicle;

[0011] Based on the current vehicle speed, at least one candidate vehicle control parameter group is selected from a plurality of pre-stored test vehicle control parameter groups; wherein the test vehicle control parameter group is a parameter group in which the disconnection response time and disconnection noise of the disconnect device, determined through testing before actual vehicle operation, meet preset disconnection control conditions;

[0012] Based on the current driving condition of the vehicle, a target control parameter group is selected from the at least one candidate vehicle control parameter group; the target control parameter group is a parameter group with the shortest response time and the smallest disconnection noise among the candidate vehicle control parameter groups;

[0013] Based on the target control parameter group, the output parameters of the target motor connected to the disconnect device are adjusted, and when the output parameters of the target motor are adjusted to be consistent with the parameters in the target control parameter group, in response to the vehicle drive mode switching instruction, the disconnect device is controlled to open, disconnecting the connection between the vehicle's motor and the vehicle's wheels, and switching the vehicle's drive mode from a four-wheel drive mode to a two-wheel drive mode.

[0014] In a second aspect, another optional embodiment of the present disclosure further provides a control device for a vehicle disconnect device, wherein the vehicle disconnect device is disposed at the end of a transmission system of the vehicle; the disconnect device is used to disconnect or connect a connection between a motor of the vehicle and a wheel of the vehicle; the control device comprises:

[0015] The vehicle speed acquisition module is used to obtain the current speed of the vehicle;

[0016] a first parameter group screening module configured to screen at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups based on the current vehicle speed; wherein the test vehicle control parameter group is a parameter group for which the disconnection response time and disconnection noise of the disconnection device, determined through testing before actual vehicle operation, meet preset disconnection control conditions;

[0017] a second parameter group screening module, configured to screen a target control parameter group from the at least one candidate vehicle control parameter group based on a current driving condition of the vehicle; the target control parameter group being a parameter group with the shortest response time and the smallest disconnection noise among the candidate vehicle control parameter groups;

[0018] A drive mode switching module is used to adjust the output parameters of the target motor connected to the disconnect device based on the target control parameter group, and when the output parameters of the target motor are adjusted to be consistent with the parameters in the target control parameter group, respond to the vehicle drive mode switching instruction, control the disconnect device to open, disconnect the connection between the vehicle motor and the wheels of the vehicle, and switch the drive mode of the vehicle from the four-wheel drive mode to the two-wheel drive mode.

[0019] In the third aspect, another optional embodiment of the present disclosure further provides an electronic device, comprising: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the storage medium communicate through the bus, and the processor executes the machine-readable instructions to perform the steps of the control method of the vehicle disconnect device as described in any one of the first aspects.

[0020] In a fourth aspect, another optional embodiment of the present disclosure further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method of the vehicle disconnect device as described in any one of the first aspects are executed.

[0021] The control method, device, electronic device and storage medium of the vehicle disconnect device provided by the embodiments of the present disclosure obtain the current speed of the vehicle; based on the current speed, screen out at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups; based on the current driving condition of the vehicle, screen out a target control parameter group from at least one candidate vehicle control parameter group; based on the target control parameter group, adjust the output parameters of the target motor connected to the disconnect device, and when the output parameters of the target motor are adjusted to be consistent with the parameters in the target control parameter group, respond to the vehicle drive mode switching instruction, control the disconnect device to open, disconnect the connection between the vehicle's motor and the vehicle's wheels, and switch the vehicle's drive mode from a four-wheel drive mode to a two-wheel drive mode. In this way, according to the current vehicle speed, a target control parameter group is screened out from a plurality of test vehicle control parameter groups whose pre-stored disconnection response time and disconnection noise of the disconnecting device meet the preset disconnection control conditions, and the output parameters of the target motor are adjusted through the target control parameter group to perform the disconnection control of the disconnecting device. The control parameter group for controlling the disconnecting device is accurately selected to ensure the shortest response time and the lowest disconnection noise when the disconnecting device is disconnected, which helps to improve the accuracy of the disconnection control of the disconnecting device and further improves the service life of the disconnecting device.

[0022] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] FIG1 is a flow chart of a method for controlling a vehicle disconnect device provided by an embodiment of the present disclosure;

[0025] FIG2 is a schematic diagram of a flow chart of determining a control parameter group for a test vehicle according to an embodiment of the present disclosure;

[0026] FIG3 is a schematic diagram of a structure of a control device for a vehicle disconnect device provided by an embodiment of the present disclosure;

[0027] FIG4 is a second structural schematic diagram of a control device for a vehicle disconnect device provided by an embodiment of the present disclosure;

[0028] FIG5 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the disclosure for which protection is sought, but merely represents selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, every other embodiment obtained by those skilled in the art without making creative work falls within the scope of protection of the present disclosure.

[0030] Please refer to Figure 1, which is a flow chart of a method for controlling a vehicle disconnect device according to an embodiment of the present disclosure. As shown in Figure 1, the method for controlling a vehicle disconnect device according to an embodiment of the present disclosure includes:

[0031] S101: Obtain the current speed of the vehicle.

[0032] S102. Based on the current vehicle speed, screen out at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups; wherein the test vehicle control parameter group is a parameter group in which the disconnection response time and disconnection noise of the disconnection device determined through testing before the actual vehicle operation meet preset disconnection control conditions.

[0033] S103. Based on the current driving condition of the vehicle, select a target control parameter group from the at least one candidate vehicle control parameter group; the target control parameter group is the parameter group with the shortest response time and the smallest disconnection noise among the candidate vehicle control parameter groups.

[0034] S104. Based on the target control parameter group, adjust the output parameters of the target motor connected to the disconnect device, and when the output parameters of the target motor are adjusted to be consistent with the parameters in the target control parameter group, respond to the vehicle drive mode switching instruction, control the disconnect device to turn on, disconnect the connection between the vehicle motor and the wheels of the vehicle, and switch the vehicle drive mode from the four-wheel drive mode to the two-wheel drive mode.

[0035] A method for controlling a vehicle disconnect device provided by an embodiment of the present disclosure screens out a target control parameter group from a plurality of test vehicle control parameter groups whose pre-stored disconnect response times and disconnect noises satisfy preset disconnect control conditions according to the current vehicle speed, adjusts the output parameters of a target motor through the target control parameter group, and then performs disconnect control of the disconnect device. The method accurately selects the control parameter group for controlling the disconnect device, ensures the shortest response time and the lowest disconnect noise when the disconnect device is disconnected, helps to improve the accuracy of the disconnect control of the disconnect device, and further improves the service life of the disconnect device.

[0036] The following describes the exemplary steps of the embodiment of the present disclosure:

[0037] S101: Obtain the current speed of the vehicle.

[0038] In the embodiment of the present disclosure, it may target new energy vehicles, and the current vehicle speed may be obtained through sensors built into the vehicle. By obtaining the operating parameters of the vehicle's motor (input torque, power, etc.), the current vehicle speed may be determined.

[0039] Furthermore, after obtaining the current speed of the vehicle, more reasonable vehicle control parameters can be determined based on the obtained current speed, so as to control the disconnect device on the vehicle to open or close according to the vehicle control parameters, so as to disconnect or connect the connection between the motor and the wheels of the vehicle, and switch the driving mode of the vehicle.

[0040] Wherein, the vehicle disconnecting device is arranged at the end of the transmission system of the vehicle; the disconnecting device is used to disconnect or connect the connection between the vehicle's motor and the vehicle's wheels.

[0041] In an optional embodiment, the driving modes of four-wheel drive and two-wheel drive are different: the four-wheel drive system is four-wheel drive; the two-wheel drive system is two-wheel drive; the differentials of four-wheel drive and two-wheel drive are different: the four-wheel drive system needs to add an intermediate differential to adjust the speed difference between the front and rear wheels; the two-wheel drive system differential can enable the left and right (or front and rear) drive wheels to rotate at different speeds.

[0042] In an optional embodiment, to improve vehicle drivability, some vehicles utilize four-wheel drive (4WD), meaning at least two powertrains, with at least one of the front or rear wheels driven by an electric motor. Four-wheel drive is required in certain operating conditions (such as climbing a hill, accelerating under heavy throttle, and on slippery roads). However, in other operating conditions (such as low speeds, low loads, and congested urban traffic), operating in a single drive mode can meet customer driving needs. Therefore, it is necessary to control the vehicle's switching between four-wheel drive and two-wheel drive modes.

[0043] In related technologies, when two-wheel drive can meet driving conditions, since some gears of the reducer rotate with the wheels, there will be a certain drag torque, which will cause the overall efficiency of the drive system to decrease, thereby affecting the cruising range. In order to reduce the above losses and further increase the cruising range of the vehicle, a disconnect device will be added to the reducer.

[0044] Among them, the reducer is an important component in the automobile transmission system. It can slow down the car and increase the torque, making the vehicle more stable and safer under different road conditions and driving speeds.

[0045] One function of a speed reducer is to reduce vehicle speed. By altering the ratio of torque and speed converted by the engine, a speed reducer transmits high-speed, low-torque power from the engine to the wheels, thereby reducing wheel speed and slowing the vehicle. A second function of a speed reducer is to increase torque. During driving, a vehicle needs to generate sufficient torque to propel it forward or climb hills, particularly in transportation or off-road applications. A speed reducer can improve a vehicle's traction and climbing ability by slowing the engine's rotational speed and increasing wheel torque.

[0046] In an optional embodiment, the disconnect device can be installed on the reducer input shaft, intermediate shaft, differential or half shaft. Generally, the disconnect device is installed at the end of the transmission system, that is, the differential or half shaft, to minimize gear churning losses.

[0047] S102. Based on the current vehicle speed, screen out at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups; wherein the test vehicle control parameter group is a parameter group in which the disconnection response time and disconnection noise of the disconnection device determined through testing before the actual vehicle operation meet preset disconnection control conditions.

[0048] In one optional embodiment, the reliability and durability of the disconnect mechanism's disconnect function are crucial to the vehicle. The selection of disconnect strategy control parameters also significantly impacts the durability of the disconnect mechanism. Improperly selected control parameters can cause premature failure of the disconnect mechanism. Therefore, during actual vehicle control, it is necessary to select a candidate vehicle control parameter set that matches the current vehicle speed from multiple pre-stored test vehicle control parameter sets based on the vehicle's current speed. Further control parameter selection is then performed based on the candidate vehicle control parameter set, and the vehicle is controlled using the selected control parameters.

[0049] In an optional embodiment, before the vehicle is put into actual operation, multiple test vehicle control parameter groups in which the disconnection response time and disconnection noise of the disconnection device meet the preset disconnection control conditions can be obtained through testing, stored in the vehicle system, and during the actual operation of the vehicle, at least one candidate vehicle control parameter group is screened out from the multiple test vehicle control parameter groups based on the real-time speed of the vehicle.

[0050] Specifically, the step of "selecting at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups based on the current vehicle speed" includes:

[0051] a1: Based on the current vehicle speed, at least one control parameter group corresponding to a target vehicle speed matching the current vehicle speed is screened out from a plurality of pre-stored test vehicle control parameter groups.

[0052] a2: Determine the at least one control parameter group as the candidate vehicle control parameter group.

[0053] In an embodiment of the present disclosure, after obtaining the current vehicle speed, the vehicle speed is used as a query keyword to filter out at least one control parameter group from multiple test vehicle control parameter groups, which includes the current vehicle speed or has a speed difference range with the current vehicle speed within a preset speed range, and then the at least one filtered control parameter group is determined as a candidate vehicle control parameter group.

[0054] In an optional embodiment, each test vehicle control parameter group includes vehicle speed, base torque, deviation torque, and oscillation frequency.

[0055] For example, if the current vehicle speed is 60km / h, at least one control parameter group with a speed of 60km / h or a speed within the speed difference range (a speed within 60km / h of the current speed, that is, a speed between 50km / h and 70k m / h) is selected from multiple test vehicle control parameter groups and determined as a candidate vehicle control parameter group.

[0056] In an optional embodiment, in order to ensure the correct control of the disconnect device during vehicle driving, it is necessary to determine multiple test vehicle control parameter groups, under which the disconnect response time and disconnect noise meet the parameter group of preset disconnect control conditions.

[0057] For example, please refer to FIG2 , which illustrates a schematic diagram of a process for determining a test vehicle control parameter set according to an embodiment of the present disclosure. As shown in FIG2 , the process for determining a test vehicle control parameter set may include: first, building a test bench; simultaneously, obtaining the test motor's oscillation base torque; and further determining the oscillation base torque at different test vehicle speeds. After acquiring the data, orthogonal testing is performed at different vehicle speeds, oscillation torques, and oscillation frequencies. Based on the test results, the disconnection time and disconnection noise are compared to ultimately determine the test vehicle control parameter set.

[0058] The following describes the specific method for determining multiple test vehicle control parameter groups:

[0059] First, the test determination process for multiple test vehicle control parameter groups can be performed before the vehicle is put into actual operation, and multiple test vehicle control parameter groups are obtained by testing the vehicle's drive motor assembly.

[0060] In an optional embodiment, the drive motor assembly is mounted on a test bench in a horizontal posture of an actual vehicle to determine the output torque of the test motor at different vehicle speeds; and a sound collection device is provided at a disconnect device connected to the drive motor assembly, the sound collection device being used to collect disconnection noise generated by the disconnect device when it is disconnected.

[0061] The sound collecting device may be a microphone or a vibration sensor.

[0062] Furthermore, after the drive motor assembly and the corresponding acquisition device are installed, it is necessary to acquire different test vehicle speeds within the actual vehicle range, and to set different control parameters and perform combination tests at different test vehicle speeds.

[0063] Specifically, multiple test vehicle control parameter groups are determined by the following steps:

[0064] b1: Obtain a driving speed range of the vehicle, and determine a plurality of test speeds within the driving speed range.

[0065] b2: for each test vehicle speed, determining a plurality of control parameter groups of the vehicle to be tested at the test vehicle speed; wherein the control parameter groups of the vehicle to be tested include a target basic torque, a deviation torque, and an oscillation frequency.

[0066] b3: For each test vehicle speed, select a test vehicle control parameter group whose disconnection response time and disconnection noise of the disconnect device meet the preset disconnection control conditions from the multiple vehicle control parameter groups to be tested corresponding to the test vehicle speed.

[0067] b4: Gather the test vehicle control parameter groups corresponding to each test vehicle speed to obtain a plurality of pre-stored test vehicle control parameter groups.

[0068] In the embodiment of the present disclosure, the vehicle's driving speed range refers to the range from the vehicle's lowest speed to its highest speed, which is determined based on the vehicle type on which the test motor is installed. The driving speed ranges of vehicles of different vehicle types are different.

[0069] In an optional embodiment, the selection of the test speed can be to divide the driving speed range into equal differentials according to preset speed intervals to obtain multiple test speeds; it can also be to determine the vehicle's commonly used driving speed sub-range based on the vehicle's historical driving data, and select the test speed so that most speeds fall within the driving speed sub-range. The test speeds outside the driving speed sub-range are selected according to the test requirements (the number of test speeds to be selected, etc.). The method of selecting the test speed can be independently selected according to the test requirements for the vehicle, and is not specifically limited in the present disclosed embodiment.

[0070] For example, assuming that the speed range of the actual vehicle to be tested is (30km / h, 120km / h), on the one hand, according to the equal differential speed (20km / h), five test speeds of 30km / h, 50km / h, 70km / h, 90km / h and 120km / h can be obtained; on the other hand, if it is known from the historical driving data of the vehicle that the vehicle's commonly used speed sub-range is (60km / h, 100km / h), then the data can be concentrated in the range of (60km / h, 100km / h), then seven test speeds of 60km / h, 70km / h, 80km / h, 90km / h, 100km / h, 30km / h and 120km / h can be obtained.

[0071] In an optional embodiment, it is necessary to arrange and combine different control parameters based on the test vehicle speed to obtain multiple control parameter groups of the vehicle to be tested at each test vehicle speed, and from the multiple control parameter groups of the vehicle to be tested corresponding to the test vehicle speed, screen out the test vehicle control parameter group whose disconnection response time and disconnection noise of the disconnection device meet the preset disconnection control conditions, and store the test vehicle control group in the running actual vehicle.

[0072] Specifically, in an optional embodiment, the step of "for each test vehicle speed, selecting a test vehicle control parameter group whose disconnection response time and disconnection noise of the disconnect device meet the preset disconnection control conditions from a plurality of test vehicle control parameter groups corresponding to the test vehicle speed" includes:

[0073] c1: For each test vehicle speed, determine the target basic torque output by the test motor at the test vehicle speed; wherein, when the test motor outputs the target basic torque, the output torques on both sides of the disconnect device end are within a preset torque range.

[0074] c2: Acquire at least one preset deviation torque and at least one oscillation frequency.

[0075] c3: For each test vehicle speed, arranging and combining the test vehicle speed with the at least one preset deviation torque and the at least one oscillation frequency to obtain at least one control parameter group of the vehicle to be tested.

[0076] c4: For each vehicle control parameter group to be tested, adjust the output torque and frequency of the test motor based on the vehicle control parameter group to be tested, and determine the disconnection response time and disconnection noise of the disconnection device connected to the test motor output.

[0077] c5: Determine the control parameter group of the vehicle to be tested whose disconnection response time and disconnection noise of the disconnection device meet the preset disconnection control conditions as the test vehicle control parameter group corresponding to the test vehicle speed.

[0078] In the embodiment of the present disclosure, in order to ensure that the resistance at the disconnect device is minimized during disconnection, it is necessary to adjust the target basic torque output by the test motor connected to the disconnect device at the test vehicle speed, and ensure that the output torques on both sides of the disconnect device end corresponding to the target basic torque are within the preset torque range.

[0079] For example, the preset torque range may be such that the output torque at the disconnect device fluctuates around 0 torque.

[0080] In an optional implementation, the target base torque output at each test vehicle speed may be determined based on the base torque at a test vehicle speed adjacent to the test vehicle speed.

[0081] Specifically, the step of “determining, for each test vehicle speed, a target base torque output by the test motor at the test vehicle speed” includes:

[0082] d1: For each test vehicle speed, determine other base torques output by the test motor at adjacent test vehicle speeds, and an initial base torque output by the test motor at the test vehicle speed.

[0083] d2: For each test vehicle speed, if the torque difference between the initial base torque output by the test motor at the test vehicle speed and the other base torques is less than the preset torque difference, the torque average of the initial base torque and the other base torques is determined as the target base torque output by the test motor at the test vehicle speed.

[0084] d3: For each test vehicle speed, if the torque difference between the initial base torque output by the test motor at the test vehicle speed and the other base torques is greater than or equal to the preset torque difference, the initial base torque is determined as the target base torque output by the test motor at the test vehicle speed.

[0085] In an optional embodiment, for each test speed, the method for determining the adjacent test speed adjacent to the test speed can be to sort multiple test speeds in order from large to small or from small to large, and then determine the adjacent speed.

[0086] For the above example, the test speeds are: 30km / h, 50km / h, 70km / h, 90km / h and 120km / h. The above test speeds are arranged in order from small to large. If the current test speed is 70km / h, then the adjacent speeds adjacent to the test speed are 50km / h and 90km / h.

[0087] Furthermore, after determining the adjacent vehicle speeds, it is necessary to obtain other base torques of the adjacent vehicle speeds, as well as the initial base torque that makes the output torques on both sides of the disconnecting device end within the preset torque range at the test vehicle speed, and calculate the torque difference between the initial base torque and the other base torques. If the torque difference is less than the preset torque difference, the torque average of the initial base torque and the other base torques is determined as the target base torque output by the test motor at the test vehicle speed; if the torque difference is greater than or equal to the preset torque difference, the initial base torque is determined as the target base torque output by the test motor at the test vehicle speed.

[0088] In an optional embodiment, the preset torque difference value may be determined based on historical operating parameters of the test motor. For example, the preset torque difference value may be set to 0.5 Nm.

[0089] For the above example, if the current test vehicle speed is 70km / h, the initial base torque T j1 The other basic torque T corresponding to the adjacent vehicle speed of 50km / h is 39.5Nm. j2 It is 39.3Nm. At this time, the torque difference between the two is 0.2Nm. Therefore, at this time, the target basic torque corresponding to the current test vehicle speed of 70km / h is the average value of the initial basic torque and other basic torques, 39.4Nm.

[0090] Furthermore, for each test vehicle speed, after determining the test vehicle speed, it is also necessary to determine at least one preset deviation torque and at least one oscillation frequency, so as to combine them with the target basic torque at the test vehicle speed to form a corresponding control parameter group of the vehicle to be tested.

[0091] The at least one preset deviation torque and the at least one oscillation frequency are determined based on historical control parameter information of the test motor and vehicle configuration information of a vehicle on which the test motor is installed.

[0092] In an optional embodiment, when the test vehicle is performing the test process, before issuing the disconnection command, a torque oscillation command is issued in advance; the torsional oscillation value is the oscillation base torque T j Add deviation torque T z , deviation torque T z 2Nm, 3Nm, etc. can be selected based on historical operating parameters; and when the test motor is installed on a real vehicle for actual operation, the input torque is set to the basic torque T j ± Deviation torque T z .

[0093] In an optional embodiment, the oscillation waveform is a square wave, the oscillation frequency is selected from 1Hz, 2Hz, 5Hz, 10Hz, and 20Hz, the number of oscillations is 6 to 10 times, and a disconnection command is issued after the actual vehicle motor torque oscillates 3 times.

[0094] Furthermore, for each test vehicle speed, the test vehicle speed is arranged and combined with the at least one preset deviation torque and at least one oscillation frequency to obtain at least one vehicle control parameter group to be tested, and multiple tests are performed on each vehicle control parameter group to be tested (in order to ensure the accuracy of the test and take into account the sporadic nature of the test, the number of tests can be selected to be five times), and the output torque and frequency of the test motor are adjusted based on the vehicle control parameter group to be tested, and the disconnection response time and disconnection noise of the disconnection device connected to the test motor output are determined, and the vehicle control parameter group to be tested whose disconnection response time and disconnection noise meet the preset disconnection control conditions is determined as the test vehicle control parameter group corresponding to the test vehicle speed.

[0095] In an optional embodiment, the preset disconnection control condition may be that the disconnection response time of the disconnection device is less than a preset response time threshold, and the disconnection noise is less than a preset noise threshold.

[0096] The preset response time threshold may be a response time determined according to the vehicle model and the actual operating conditions of the vehicle. Similarly, the preset noise threshold may also be determined according to the vehicle model and the actual operating conditions of the vehicle.

[0097] Furthermore, after determining the test vehicle control parameter group corresponding to each test vehicle speed, multiple test vehicle control parameter groups are grouped according to the test vehicle speed to obtain multiple pre-stored test vehicle control parameter groups.

[0098] In an optional embodiment, the multiple test vehicle control parameter groups obtained can be stored in the central controller of the actual vehicle. After obtaining the current vehicle speed, the target control parameter group is screened out from the candidate vehicle control parameter groups corresponding to the current vehicle speed according to the current vehicle driving conditions.

[0099] S103. Based on the current driving condition of the vehicle, select a target control parameter group from the at least one candidate vehicle control parameter group; the target control parameter group is the parameter group with the shortest response time and the smallest disconnection noise among the candidate vehicle control parameter groups.

[0100] In an optional embodiment, the screened target control parameter group can be the parameter group with the shortest response time and the smallest disconnection noise among the candidate vehicle control parameter groups; it can also be based on the current driving condition of the vehicle, and a target control parameter group that is more in line with the current driving condition is screened from the parameter group that meets the preset disconnection control conditions (for example, if the current vehicle is driving at high speed, it may be more inclined to select a parameter group with a larger output torque of the test motor). This target control parameter group may not be the parameter group with the shortest response time and the smallest disconnection noise.

[0101] Furthermore, after determining the target control parameter group, the output parameters of the motor can be controlled according to the target control parameter group, and then after receiving the vehicle drive mode switching instruction, the motor is regulated according to appropriate parameters to ensure that the disconnection response time of the disconnection device is the shortest and the disconnection noise is the smallest.

[0102] S104. Based on the target control parameter group, adjust the output parameters of the target motor connected to the disconnect device, and when the output parameters of the target motor are adjusted to be consistent with the parameters in the target control parameter group, respond to the vehicle drive mode switching instruction, control the disconnect device to turn on, disconnect the connection between the vehicle motor and the wheels of the vehicle, and switch the vehicle drive mode from the four-wheel drive mode to the two-wheel drive mode.

[0103] In an optional embodiment, the vehicle drive mode switching instruction can be a switching instruction manually issued by the vehicle user, or it can be automatically matched with the corresponding drive mode according to the current driving conditions of the vehicle, and then the drive mode is automatically switched, and the system automatically issues the vehicle drive mode switching instruction.

[0104] Specifically, when a vehicle drive mode switching instruction is received and the current mode is four-wheel drive, the disconnect device is controlled to turn on, disconnecting the connection between the vehicle's motor and the vehicle's wheels, and switching the vehicle's drive mode from four-wheel drive to two-wheel drive.

[0105] Furthermore, after the vehicle driving mode is switched from the four-wheel drive mode to the two-wheel drive mode, if a vehicle driving mode switching instruction is received again, the operation of switching from the two-wheel drive mode to the four-wheel drive mode will be executed.

[0106] Specifically, after the step of “responding to the vehicle drive mode switching instruction, controlling the disconnection device to be turned on, disconnecting the connection between the vehicle motor and the vehicle wheels, and switching the vehicle drive mode from the four-wheel drive mode to the two-wheel drive mode”, the control method further includes:

[0107] e1: In response to a vehicle driving mode switching instruction, the disconnect device is controlled to be closed, the connection between the vehicle motor and the vehicle wheels is connected, and the driving mode of the vehicle is switched from a two-wheel drive mode to a four-wheel drive mode.

[0108] In an optional embodiment, similarly, the vehicle drive mode switching instruction can be a switching instruction manually issued by the vehicle user, or it can be automatically matched with the corresponding drive mode according to the current driving conditions of the vehicle, and then the drive mode is automatically switched, and the system automatically issues the vehicle drive mode switching instruction.

[0109] Specifically, when a vehicle drive mode switching instruction is received and the current mode is two-wheel drive, the control disconnect device is closed, the connection between the vehicle's motor and the vehicle's wheels is disconnected, and the vehicle's drive mode is switched from two-wheel drive to four-wheel drive.

[0110] The present invention provides a method for controlling a vehicle disconnect device, comprising: obtaining a current vehicle speed; selecting at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups based on the current vehicle speed; selecting a target control parameter group from the at least one candidate vehicle control parameter group based on the current vehicle driving condition; adjusting an output parameter of a target motor connected to the disconnect device based on the target control parameter group; and, when the output parameter of the target motor is adjusted to be consistent with a parameter in the target control parameter group, controlling the disconnect device to be activated in response to a vehicle drive mode switching instruction, disconnecting the connection between the vehicle motor and the vehicle wheels, thereby switching the vehicle drive mode from a four-wheel drive mode to a two-wheel drive mode. Thus, based on the current vehicle speed, the target control parameter group is selected from a plurality of pre-stored test vehicle control parameter groups whose disconnect response time and disconnect noise of the disconnect device meet preset disconnect control conditions. The target control parameter group is then used to adjust the output parameter of the target motor and then control the disconnection of the disconnect device. The control parameter group for controlling the disconnect device is accurately selected to ensure the shortest response time and lowest disconnect noise when the disconnect device is disconnected, thereby improving the accuracy of the disconnect control of the disconnect device and further extending the service life of the disconnect device.

[0111] Based on the same inventive concept, the embodiment of the present disclosure also provides a control device for a vehicle disconnecting device corresponding to the control method for a vehicle disconnecting device. Since the principle of solving the problem by the device in the embodiment of the present disclosure is similar to the control method for the vehicle disconnecting device in the embodiment of the present disclosure, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0112] Please refer to Figures 3 and 4. Figure 3 is a schematic diagram of the structure of a control device for a vehicle disconnect device provided in an embodiment of the present disclosure. Figure 4 is a schematic diagram of the structure of a control device for a vehicle disconnect device provided in an embodiment of the present disclosure. As shown in Figure 3, the control device 300 includes:

[0113] The vehicle speed acquisition module 310 is used to obtain the current speed of the vehicle;

[0114] A first parameter group screening module 320 is configured to screen at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups based on the current vehicle speed; wherein the test vehicle control parameter group is a parameter group for which the disconnection response time and disconnection noise of the disconnection device, determined through testing before actual vehicle operation, meet preset disconnection control conditions;

[0115] A second parameter group screening module 330 is configured to screen a target control parameter group from the at least one candidate vehicle control parameter group based on the current driving condition of the vehicle; the target control parameter group being the parameter group with the shortest response time and the smallest disconnection noise among the candidate vehicle control parameter groups;

[0116] The drive mode switching module 340 is used to adjust the output parameters of the target motor connected to the disconnect device based on the target control parameter group, and when the output parameters of the target motor are adjusted to be consistent with the parameters in the target control parameter group, respond to the vehicle drive mode switching instruction to control the disconnect device to open, disconnect the connection between the vehicle's motor and the vehicle's wheels, and switch the vehicle's drive mode from a four-wheel drive mode to a two-wheel drive mode.

[0117] In an optional embodiment, as shown in FIG4 , the control device 300 further includes a parameter group determination module 350 , and the parameter group determination module 350 is configured to:

[0118] Obtaining a driving speed range of the vehicle, and determining a plurality of test speeds within the driving speed range;

[0119] For each test vehicle speed, determining a plurality of control parameter groups of the vehicle to be tested at the test vehicle speed; wherein the control parameter groups of the vehicle to be tested include a target base torque, a deviation torque, and an oscillation frequency;

[0120] For each test vehicle speed, screening out a test vehicle control parameter group whose disconnection response time and disconnection noise of the disconnect device meet the preset disconnection control conditions from a plurality of test vehicle control parameter groups corresponding to the test vehicle speed;

[0121] The test vehicle control parameter groups corresponding to each test vehicle speed are aggregated to obtain a plurality of pre-stored test vehicle control parameter groups.

[0122] In an optional embodiment, as shown in FIG4 , the control device 300 further includes a disconnect device closing module 360 ​​, wherein the disconnect device closing module 360 ​​is configured to:

[0123] In response to a vehicle driving mode switching instruction, the disconnect device is controlled to be closed, the connection between the vehicle motor and the vehicle wheels is connected, and the driving mode of the vehicle is switched from a two-wheel drive mode to a four-wheel drive mode.

[0124] In an optional embodiment, when the parameter group determination module 350 is used to screen out, for each test vehicle speed, a test vehicle control parameter group whose disconnection response time and disconnection noise of the disconnect device meet preset disconnection control conditions from a plurality of test vehicle control parameter groups corresponding to the test vehicle speed, the parameter group determination module 350 is configured to:

[0125] For each test vehicle speed, determining a target base torque output by the test motor at the test vehicle speed; wherein, when the test motor outputs the target base torque, the output torques on both sides of the disconnect device end are within a preset torque range;

[0126] obtaining at least one preset deviation torque and at least one oscillation frequency;

[0127] For each test vehicle speed, arranging and combining the test vehicle speed with the at least one preset deviation torque and the at least one oscillation frequency to obtain at least one control parameter group of the vehicle to be tested;

[0128] For each vehicle control parameter group to be tested, adjusting the output torque and frequency of the test motor based on the vehicle control parameter group to be tested, and determining the disconnection response time and disconnection noise of the disconnection device connected to the output of the test motor;

[0129] The control parameter group of the vehicle to be tested in which the disconnection response time and the disconnection noise of the disconnection device meet the preset disconnection control conditions is determined as the test vehicle control parameter group corresponding to the test vehicle speed.

[0130] In an optional embodiment, when the parameter group determination module 350 is used to determine the target base torque output by the motor at each test vehicle speed, the parameter group determination module 350 is configured to:

[0131] For each test vehicle speed, determining other base torques output by the test motor at adjacent test vehicle speeds and an initial base torque output by the test motor at the test vehicle speed;

[0132] For each test vehicle speed, if a torque difference between an initial base torque output by the test motor at the test vehicle speed and the other base torques is less than a preset torque difference, an average of the initial base torque and the other base torques is determined as a target base torque output by the test motor at the test vehicle speed;

[0133] For each test vehicle speed, if the torque difference between the initial base torque output by the test motor at the test vehicle speed and the other base torques is greater than or equal to the preset torque difference, the initial base torque is determined as the target base torque output by the test motor at the test vehicle speed.

[0134] In an optional embodiment, the at least one preset deviation torque and the at least one oscillation frequency are determined based on historical control parameter information of the test motor and vehicle configuration information of a vehicle on which the test motor is installed.

[0135] In an optional implementation, the preset disconnection control condition includes at least one of the following:

[0136] The disconnection response time of the disconnection device is less than a preset response time threshold, and the disconnection noise is less than a preset noise threshold.

[0137] In an optional embodiment, when the first parameter group screening module 320 is used to screen at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups based on the current vehicle speed, the first parameter group screening module 320 is used to:

[0138] Based on the current vehicle speed, selecting at least one control parameter group corresponding to a target vehicle speed matching the current vehicle speed from a plurality of pre-stored test vehicle control parameter groups;

[0139] The at least one control parameter group is determined as the candidate vehicle control parameter group.

[0140] In an optional embodiment, the test motor is a core component of the drive motor assembly; the drive motor assembly is installed on a test bench in a horizontal posture of the actual vehicle to determine the output torque of the test motor according to different vehicle speeds; and a sound collection device is provided at a disconnection device connected to the drive motor assembly, and the sound collection device is used to collect the disconnection noise generated by the disconnection device when it is disconnected.

[0141] The control device of a vehicle disconnect device provided by the present disclosure obtains a current vehicle speed; based on the current vehicle speed, selects at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups; based on the current vehicle driving condition, selects a target control parameter group from the at least one candidate vehicle control parameter group; based on the target control parameter group, adjusts the output parameters of a target motor connected to the disconnect device; and when the output parameters of the target motor are adjusted to be consistent with the parameters in the target control parameter group, responds to a vehicle drive mode switching instruction, controls the disconnect device to be activated, disconnects the connection between the vehicle motor and the vehicle wheels, and switches the vehicle drive mode from a four-wheel drive mode to a two-wheel drive mode. In this way, based on the current vehicle speed, the target control parameter group is selected from a plurality of pre-stored test vehicle control parameter groups whose disconnection response time and disconnection noise of the disconnect device meet preset disconnection control conditions, and the output parameters of the target motor are adjusted based on the target control parameter group to control the disconnection of the disconnect device, thereby accurately selecting the control parameter group for controlling the disconnect device, ensuring the shortest response time and lowest disconnection noise when the disconnect device is disconnected, thereby helping to improve the accuracy of the disconnection control of the disconnect device and further extending the service life of the disconnect device.

[0142] Please refer to FIG5 , which is a schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure. As shown in FIG5 , the electronic device 500 includes a processor 510 , a memory 520 , and a bus 530 .

[0143] The memory 520 stores machine-readable instructions executable by the processor 510. When the electronic device 500 is running, the processor 510 communicates with the memory 520 via the bus 530. When the machine-readable instructions are executed by the processor 510, the steps of the control method of the vehicle disconnect device in the method embodiment shown in Figure 1 above can be executed. The specific implementation method can be found in the method embodiment and will not be repeated here.

[0144] The embodiment of the present disclosure further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for controlling a vehicle disconnect device in the method embodiment shown in FIG1 can be executed. The specific implementation method can be found in the method embodiment and will not be described in detail here.

[0145] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0146] In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0147] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0148] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0149] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the relevant technology or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0150] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The scope of protection of the present disclosure is not limited thereto. Although the present disclosure has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present disclosure, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A method for controlling a vehicle disconnect device, wherein the vehicle disconnect device is arranged at the end of a transmission system of the vehicle; The disconnecting device is used to disconnect or connect the connection between the motor of the vehicle and the wheel of the vehicle; the control method includes: Get the current speed of the vehicle; Based on the current vehicle speed, at least one candidate vehicle control parameter group is selected from a plurality of pre-stored test vehicle control parameter groups; wherein the test vehicle control parameter group is a parameter group in which the disconnection response time and disconnection noise of the disconnection device determined by testing before the actual vehicle operation meet the preset disconnection control conditions; Based on the current driving condition of the vehicle, a target control parameter group is selected from the at least one candidate vehicle control parameter group; the target control parameter group is a parameter group with the shortest response time and the smallest disconnection noise among the candidate vehicle control parameter groups; Based on the target control parameter group, adjusting the output parameter of the target motor connected to the disconnection device, and when the output parameter of the target motor is adjusted to be consistent with the parameter in the target control parameter group, in response to the vehicle drive mode switching instruction, controlling the disconnection device to be turned on, disconnecting the connection between the motor of the vehicle and the wheels of the vehicle, and switching the drive mode of the vehicle from the four-wheel drive mode to the two-wheel drive mode; Determine multiple test vehicle control parameter sets by following these steps: Acquiring a driving speed range of the vehicle, and determining a plurality of test speeds within the driving speed range; For each test vehicle speed, a plurality of control parameter groups of the vehicle to be tested under the test vehicle speed are determined; wherein the control parameter groups of the vehicle to be tested include a target basic torque, a deviation torque and an oscillation frequency; For each test vehicle speed, from the multiple test vehicle control parameter groups corresponding to the test vehicle speed, a test vehicle control parameter group whose disconnection response time and disconnection noise of the disconnection device meet the preset disconnection control conditions is selected; The test vehicle control parameter groups corresponding to each test vehicle speed are aggregated to obtain a plurality of pre-stored test vehicle control parameter groups; The preset disconnection control condition includes at least one of the following: The disconnection response time of the disconnection device is less than a preset response time threshold, and the disconnection noise is less than a preset noise threshold.

2. The control method according to claim 1, wherein: For each test vehicle speed, a test vehicle control parameter group whose disconnection response time and disconnection noise of the disconnection device meet the preset disconnection control condition is screened out from a plurality of vehicle control parameter groups to be tested corresponding to the test vehicle speed, including: For each test vehicle speed, determining a target basic torque output by the test motor at the test vehicle speed; wherein, when the test motor outputs the target basic torque, the output torques on both sides of the disconnect device end are within a preset torque range; acquiring at least one preset deviation torque and at least one oscillation frequency; For each test vehicle speed, the test vehicle speed is arranged and combined with the at least one preset deviation torque and the at least one oscillation frequency to obtain at least one control parameter group of the vehicle to be tested; For each vehicle control parameter group to be tested, the output torque and frequency of the test motor are adjusted based on the vehicle control parameter group to be tested, and the disconnection response time of the disconnection device connected to the output of the test motor is determined. and disconnect noise; The control parameter group of the vehicle to be tested in which the disconnection response time and the disconnection noise of the disconnection device meet the preset disconnection control conditions is determined as the test vehicle control parameter group corresponding to the test vehicle speed.

3. The control method according to claim 2, wherein: The step of determining, for each test vehicle speed, a target base torque output by the test motor at the test vehicle speed includes: For each test vehicle speed, determining other base torques output by the test motor at adjacent test vehicle speeds and an initial base torque output by the test motor at the test vehicle speed; For each test vehicle speed, if the torque difference between the initial base torque output by the test motor at the test vehicle speed and the other base torques is less than the preset torque difference, the torque average of the initial base torque and the other base torques is determined as the target base torque output by the test motor at the test vehicle speed; For each test vehicle speed, if the torque difference between the initial base torque output by the test motor at the test vehicle speed and the other base torques is greater than or equal to the preset torque difference, the initial base torque is determined as the target base torque output by the test motor at the test vehicle speed.

4. The control method according to claim 2, wherein: The at least one preset deviation torque and the at least one oscillation frequency are determined based on historical control parameter information of the test motor and vehicle configuration information of a vehicle on which the test motor is installed.

5. The control method according to claim 1, wherein: The step of selecting at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups based on the current vehicle speed comprises: Based on the current vehicle speed, selecting at least one control parameter group corresponding to a target vehicle speed matching the current vehicle speed from a plurality of pre-stored test vehicle control parameter groups; The at least one control parameter group is determined as the candidate vehicle control parameter group.

6. The control method according to claim 2, wherein: The test motor is a core component of the drive motor assembly; the drive motor assembly is installed on a test bench in a horizontal posture of a real vehicle to determine the output torque of the test motor according to different vehicle speeds; and a sound collection device is provided at a disconnection device connected to the drive motor assembly, and the sound collection device is used to collect the disconnection noise generated by the disconnection device when it is disconnected.

7. The control method according to claim 1, wherein: After the disconnect device is controlled to be turned on in response to the vehicle drive mode switching instruction, the connection between the motor of the vehicle and the wheels of the vehicle is disconnected, and the drive mode of the vehicle is switched from the four-wheel drive mode to the two-wheel drive mode; The control method further comprises: In response to a vehicle driving mode switching instruction, the disconnect device is controlled to be closed, the connection between the vehicle's motor and the vehicle's wheels is closed, and the vehicle's driving mode is switched from a two-wheel drive mode to a four-wheel drive mode.

8. A control device for a vehicle disconnect device, the vehicle disconnect device being arranged at the end of a transmission system of the vehicle; The disconnecting device is used to disconnect or connect the connection between the motor of the vehicle and the wheels of the vehicle; the control device includes: The vehicle speed acquisition module is used to obtain the current vehicle speed; A first parameter group screening module is used to screen out at least one candidate vehicle control parameter group from a plurality of pre-stored test vehicle control parameter groups based on the current vehicle speed; wherein the test vehicle control parameter group is a parameter group whose disconnection response time and disconnection noise of the disconnection device determined by testing before the actual vehicle operation meet the preset disconnection control conditions; A second parameter group screening module is used to screen out a target control parameter group from the at least one candidate vehicle control parameter group based on the current driving condition of the vehicle; the target control parameter group is a parameter group with the shortest response time and the smallest disconnection noise among the candidate vehicle control parameter groups; a driving mode switching module, configured to adjust an output parameter of a target motor connected to a disconnecting device based on the target control parameter group, and when the output parameter of the target motor is adjusted to be consistent with the parameter in the target control parameter group, in response to a vehicle driving mode switching instruction, control the disconnecting device to be turned on, disconnect the connection between the motor of the vehicle and the wheels of the vehicle, and switch the driving mode of the vehicle from a four-wheel drive mode to a two-wheel drive mode; The control device further comprises a parameter group determination module, wherein the parameter group determination module is used to: Acquiring a driving speed range of the vehicle, and determining a plurality of test speeds within the driving speed range; For each test vehicle speed, a plurality of control parameter groups of the vehicle to be tested under the test vehicle speed are determined; wherein the control parameter groups of the vehicle to be tested include a target basic torque, a deviation torque and an oscillation frequency; For each test vehicle speed, from the multiple test vehicle control parameter groups corresponding to the test vehicle speed, a test vehicle control parameter group whose disconnection response time and disconnection noise of the disconnection device meet the preset disconnection control conditions is selected; The test vehicle control parameter groups corresponding to each test vehicle speed are aggregated to obtain a plurality of pre-stored test vehicle control parameter groups; The preset disconnection control condition includes at least one of the following: The disconnection response time of the disconnection device is less than a preset response time threshold, and the disconnection noise is less than a preset noise threshold.

9. An electronic device, comprising: A processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the storage medium communicate through the bus, and the processor executes the machine-readable instructions to perform the steps of the control method of the vehicle disconnect device as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to execute the steps of the method for controlling a vehicle disconnect device according to any one of claims 1 to 7.

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