Control method and device of vehicle, vehicle and storage medium

Abstract

The application relates to a control method and device of a vehicle, the vehicle and a storage medium, wherein the method comprises the following steps: acquiring motor operation data and reducer operation data of the vehicle; calculating motor required oil quantity and reducer required oil quantity of the vehicle based on the motor operation data and the reducer operation data; calculating an oil quantity distribution ratio of the motor by using the motor required oil quantity and the reducer required oil quantity, and adjusting the opening degree of a proportional valve of the vehicle to a target opening degree matched with the oil quantity distribution ratio. Thus, the technical problems that a fixed throttle hole or a simple parallel oil path is difficult to be compatible with multiple working conditions, efficiency and heat dissipation are difficult to be considered, and local cooling deficiency or excessive cooling is easily caused in the prior art are solved.

Description

Technical Field

[0001] This application relates to the field of vehicle thermal management technology, and in particular to a vehicle control method, device, vehicle, and storage medium. Background Technology

[0002] In related technologies, the electric drive oil cooling system of vehicles uses a fixed throttle orifice or a simple parallel oil circuit to cool and lubricate the stator, rotor, gears, and bearings of the motor. In order to ensure heat dissipation under peak operating conditions, the oil circuit is generally designed according to the maximum requirements. This results in excessive oil entering the motor cavity under medium and low load and high speed and low torque conditions, increasing oil churning losses and affecting motor efficiency. In addition, the fixed oil circuit is prone to local insufficient or excessive cooling. Especially under low temperature conditions, it is impossible to concentrate the flow to preheat the reducer, resulting in high mechanical resistance and low efficiency, which urgently needs to be improved. Summary of the Invention

[0003] This application provides a vehicle control method, device, vehicle, and storage medium to solve the technical problems in the related art, such as the difficulty in compatibility of fixed throttle orifices or simple parallel oil circuits with multiple operating conditions, resulting in difficulty in balancing efficiency and heat dissipation, and easily causing local insufficient cooling or over-cooling.

[0004] The first aspect of this application provides a vehicle control method. The vehicle is equipped with a proportional valve, the outlet of which is connected to a motor and a reducer respectively. By controlling the opening of the proportional valve, the total amount of oil pumped by the oil pump is proportionally distributed to the motor and the reducer. The method includes the following steps: acquiring motor operating data and reducer operating data of the vehicle; calculating the required oil quantity for the motor and the reducer based on the motor operating data and the reducer operating data; calculating the oil quantity distribution ratio for the motor using the required oil quantity for the motor and the reducer; and adjusting the opening of the proportional valve of the vehicle to a target opening that matches the oil quantity distribution ratio.

[0005] Optionally, in one embodiment of this application, before adjusting the opening of the vehicle's proportional valve to a target opening that matches the fuel distribution ratio, the method further includes: obtaining a flag bit of the vehicle's first run marker; and determining the target opening by combining the flag bit and the fuel distribution ratio.

[0006] Optionally, in one embodiment of this application, determining the target opening degree by combining the flag bit and the fuel distribution ratio includes: determining that the vehicle is in its first operating cycle when the flag bit is true; and within the first operating cycle, using the fuel distribution ratio as the opening ratio of the proportional valve to generate the target opening degree based on the opening ratio.

[0007] Optionally, in one embodiment of this application, determining the target opening degree by combining the flag bit and the fuel distribution ratio includes: when the flag bit is not true, obtaining the current motor temperature, current reducer oil temperature, current motor torque, and current motor speed based on the motor operating data and the reducer operating data, to determine whether the vehicle meets the preset compensation conditions, and obtaining a judgment result; and determining the target opening degree by combining the judgment result and the fuel distribution ratio.

[0008] Optionally, in one embodiment of this application, determining the target opening degree by combining the judgment result and the oil quantity allocation ratio includes: under the condition of satisfying the preset compensation condition, matching a corresponding compensation mode based on the current motor temperature, the current reducer oil temperature, the current motor torque, and the current motor speed; and compensating and correcting the oil quantity allocation ratio based on the compensation mode to obtain the actual oil quantity allocation ratio, so as to determine the target opening degree based on the actual oil quantity allocation ratio.

[0009] Optionally, in one embodiment of this application, after obtaining the actual oil quantity distribution ratio, the method further includes: in response to the actual oil quantity ratio being consistent with a preset ratio limit value, acquiring new motor operating data and new reducer operating data; and adjusting the vehicle's oil pump speed based on the new motor operating data and the new reducer operating data, provided that the new motor operating data and the new reducer operating data still meet the preset compensation conditions.

[0010] Optionally, in one embodiment of this application, the method further includes: acquiring the oil pan temperature or ambient temperature of the vehicle; in response to the oil pan temperature or the ambient temperature being less than a preset low temperature threshold, determining the adjustment rate of the proportional valve based on the oil pan temperature or the ambient temperature, so as to control the vehicle to adjust the opening of the proportional valve to the target opening based on the adjustment rate.

[0011] A second aspect of this application provides a vehicle control device. The vehicle is equipped with a proportional valve, the outlet of which is connected to a motor and a reducer, respectively. By controlling the opening of the proportional valve, the total amount of oil pumped by the oil pump is proportionally distributed to the motor and the reducer. The device includes: a first acquisition module for acquiring motor operating data and reducer operating data; a calculation module for calculating the required oil quantity for the motor and the reducer based on the motor operating data and the reducer operating data; and a first control module for calculating the oil quantity distribution ratio of the motor using the required oil quantity for the motor and the reducer, and adjusting the opening of the proportional valve to a target opening that matches the oil quantity distribution ratio.

[0012] Optionally, in one embodiment of this application, it further includes: a second acquisition module, configured to acquire a flag bit of the vehicle's first run marker; and a determination module, configured to determine the target opening degree by combining the flag bit and the fuel distribution ratio.

[0013] Optionally, in one embodiment of this application, the determining module includes: a first determining unit, configured to determine that the vehicle is in its first operating cycle when the flag bit is true; and a generating unit, configured to use the fuel distribution ratio as the opening ratio of the proportional valve during the first operating cycle, so as to generate the target opening degree based on the opening ratio.

[0014] Optionally, in one embodiment of this application, the determining module includes: an acquisition unit, configured to, when the flag bit is not true, obtain the current motor temperature, the current reducer oil temperature, the current motor torque, and the current motor speed based on the motor operating data and the reducer operating data, so as to determine whether the vehicle meets the preset compensation conditions and obtain a determination result; and a second determining unit, configured to combine the determination result and the oil quantity distribution ratio to determine the target opening degree.

[0015] Optionally, in one embodiment of this application, the second determining unit includes: a calculation subunit, configured to match a corresponding compensation mode based on the current motor temperature, the current reducer oil temperature, the current motor torque, and the current motor speed when the preset compensation conditions are met; and a compensation subunit, configured to compensate and correct the oil quantity distribution ratio based on the compensation mode to obtain the actual oil quantity distribution ratio, so as to determine the target opening degree based on the actual oil quantity distribution ratio.

[0016] Optionally, in one embodiment of this application, it further includes: a third acquisition module, used to acquire new motor operating data and new reducer operating data in response to the actual oil quantity ratio being consistent with a preset ratio limit value; and a second control module, used to adjust the oil pump speed of the vehicle based on the new motor operating data and the new reducer operating data, provided that the new motor operating data and the new reducer operating data still meet the preset compensation conditions.

[0017] Optionally, in one embodiment of this application, it further includes: a fourth acquisition module, used to acquire the oil pan temperature or ambient temperature of the vehicle; and a third control module, used to determine the adjustment rate of the proportional valve based on the oil pan temperature or ambient temperature in response to the oil pan temperature or ambient temperature being less than a preset low temperature threshold, so as to control the vehicle to adjust the opening of the proportional valve to the target opening based on the adjustment rate.

[0018] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle control method as described in the above embodiments.

[0019] A fourth aspect of this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform a vehicle control method as described in the above embodiments.

[0020] A fifth aspect of this application provides a computer program product, including a computer program, which, when executed, is used to implement the vehicle control method described above.

[0021] This application embodiment can allocate the total amount of oil pumped by the oil pump to the motor and reducer proportionally by setting a proportional valve. The oil allocation ratio is calculated using the vehicle's motor and reducer operating data to achieve dynamic allocation. This reduces losses, improves system efficiency, and optimizes performance under special operating conditions such as cold starts, while ensuring motor cooling and reducer lubrication. Therefore, it solves the technical problems in related technologies where fixed throttle orifices or simple parallel oil circuits are difficult to be compatible with multiple operating conditions, leading to difficulties in balancing efficiency and heat dissipation, and easily causing insufficient or excessive local cooling.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram illustrating the principle of a vehicle control method according to an embodiment of this application; Figure 2 This is a flowchart of a vehicle control method provided according to an embodiment of this application; Figure 3 This is a flowchart of a vehicle control method according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a vehicle control device according to an embodiment of this application; Figure 5 This is a structural schematic diagram of a vehicle provided according to an embodiment of this application. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0025] The following description, with reference to the accompanying drawings, outlines a vehicle control method, apparatus, vehicle, and storage medium according to embodiments of this application. Addressing the technical problems mentioned in the background section, where fixed orifices or simple parallel oil circuits are difficult to integrate with various operating conditions, leading to difficulties in balancing efficiency and heat dissipation, and potentially causing insufficient or excessive cooling in certain areas, this application provides a vehicle control method. In this method, a proportional valve is used to proportionally distribute the total oil pumped by the oil pump to the motor and reducer. The oil distribution ratio is calculated using the vehicle's motor and reducer operating data to achieve dynamic allocation. This reduces losses, improves system efficiency, and optimizes performance under special operating conditions such as cold starts, while ensuring motor cooling and reducer lubrication. Therefore, this solves the technical problems in the related art where fixed orifices or simple parallel oil circuits are difficult to integrate with various operating conditions, leading to difficulties in balancing efficiency and heat dissipation, and potentially causing insufficient or excessive cooling in certain areas.

[0026] Before describing the vehicle control method of the embodiments of this application, the structure involved in the embodiments of this application will be described first.

[0027] like Figure 1 As shown, the vehicle in this embodiment includes: an oil pump 1, a proportional valve 2, an MCU (microcontroller) controller 3, a motor oil passage 41, a motor stator / rotor 42, a reducer oil passage 51, a reducer bearing + gear shaft 52, an oil pan 6, an oil filter 7, and an oil cooler 8.

[0028] The oil flows sequentially from the oil pan 6, oil filter 7, and oil cooler 8 to the oil pump 1. The oil pump 1 pumps the oil and directs it to the proportional valve 2. The MCU controller 3 calculates the oil distribution volume based on signals such as motor speed, torque, motor temperature, and reducer oil temperature, and controls the distribution ratio of the electronic proportional valve 2. After distribution, the oil flows out in two paths. The first path passes through the motor oil passage 41 to the motor stator / rotor 42 for heat dissipation. The second path passes through the reducer oil passage 51 to the reducer bearing + gear shaft 52 for heat dissipation and lubrication.

[0029] In actual implementation, Figure 2 This is a flowchart illustrating a vehicle control method provided in an embodiment of this application.

[0030] like Figure 2 As shown, the vehicle control method includes the following steps: In step S201, the vehicle's motor operation data and reducer operation data are acquired.

[0031] This application embodiment can first perform vehicle initialization to conduct hardware and software self-tests and resource configurations after the MCU (microcontroller) is powered on, such as configuring the MCU internal clock, setting the sampling accuracy of the analog-to-digital converter, configuring the communication baud rate of the controller area network bus, and initializing the period of the pulse width modulation module; clearing all calculation cache areas and restoring global variables to their default values; checking whether the analog-to-digital converter channels connected to the motor temperature sensor and the reducer oil temperature sensor are short-circuited or open-circuited, and confirming that the signal line connections are normal; establishing communication with the vehicle controller and battery management system through the controller area network bus, confirming that there are no error frames on the bus and that the data link is stable; clearing the temporary fault codes left over from the last power-off, ensuring that the diagnostic records for this startup start from zero, etc.

[0032] After initialization, the current motor speed n is collected. m Current motor torque T m Current motor temperature (TEM) m Current reducer oil temperature (TEM) g We collect operating data to ensure data stability and facilitate the calculation of required oil volume using motor and reducer operating data.

[0033] In step S202, the required oil quantity for the vehicle's motor and reducer is calculated based on the motor operating data and reducer operating data.

[0034] Furthermore, embodiments of this application can calculate the required oil quantity Qm for the motor and reducer based on the collected operating data using a control algorithm. req Qg req By controlling the opening of the proportional valve, the oil quantity of the motor and the oil quantity of the reducer are dynamically distributed.

[0035] For example, in this embodiment of the application, the required oil quantity for the motor can be obtained by querying a preset motor basic flow rate MAP using the motor speed and motor torque as indexes; simultaneously, the required oil quantity for the reducer can be obtained by querying a preset reducer basic flow rate MAP using the reducer speed and reducer torque as indexes. The motor basic flow rate MAP and the reducer basic flow rate MAP can be constructed using data obtained from physical bench testing.

[0036] In order to improve the accuracy of the motor oil demand and the reducer oil demand, the embodiments of this application can also calculate the difference between the motor temperature and the target motor temperature, and the difference between the reducer oil temperature and the target reducer temperature, and then combine the PI regulator, the difference, and the upper and lower limits of the oil demand determined based on the vehicle's own parameters to correct the motor oil demand and the reducer oil demand.

[0037] In step S203, the oil distribution ratio of the motor is calculated using the oil demand of the motor and the oil demand of the reducer, and the opening of the proportional valve of the vehicle is adjusted to the target opening that matches the oil distribution ratio.

[0038] Furthermore, embodiments of this application can be based on the motor's required oil volume Qm. req And the required oil volume Qg for the reducer req Calculate the oil distribution ratio .

[0039] Based on the fuel distribution ratio K and the total flow rate of the vehicle's thermal management system (which can be estimated by the fuel pump speed), and combined with the flow-opening characteristic curve of the proportional valve, the target opening of the proportional valve is determined.

[0040] Among them, the flow-opening characteristic curve of the proportional valve can be constructed from the test data of relevant tests performed by the hydraulic valve performance test bench. Under multiple preset total flow operating points, during the test, the actual oil distribution ratio of the motor branch and the reducer branch at different openings can be recorded respectively during the process of the proportional valve from fully closed to fully open, thereby forming a MAP diagram corresponding to the total flow, opening, and oil distribution ratio. That is, a MAP diagram constructed from multiple flow-opening characteristic curves constructed from the opening and oil distribution ratio under different total flow conditions.

[0041] Based on the MAP diagram, the actual total flow of the vehicle is used as an index to retrieve the corresponding flow-opening characteristic curve, and then the fuel distribution ratio is matched according to the demand flow to determine the target opening of the proportional valve.

[0042] Optionally, in one embodiment of this application, before adjusting the opening of the vehicle's proportional valve to a target opening that matches the fuel distribution ratio, the method further includes: obtaining a flag bit of the vehicle's first run marker; and determining the target opening by combining the flag bit and the fuel distribution ratio.

[0043] It is understandable that after the controller is powered on and initialized, the temperature sensor collects the ambient cold-state value under shutdown conditions, which cannot reflect the actual thermal load of the electric drive assembly at the current speed and torque. Therefore, in this embodiment, before determining the target opening degree, the system can identify the flag of the first run to determine whether the vehicle is currently in its first run cycle. Specifically, after the microcontroller completes initialization, it considers the first action of signal acquisition, fuel quantity distribution ratio calculation, and proportional valve control as the first run (the vehicle is in its first run cycle). Before the first run ends, the flag of the first run can be set to true (or 1). After the first run ends, the flag is changed to false (or 1).

[0044] Depending on the specific circumstances, the embodiments of this application can determine the target opening degree to avoid discrepancies between the proportional valve control and the actual operating conditions caused by inaccurate temperature data acquisition.

[0045] Optionally, in one embodiment of this application, determining the target opening degree by combining the flag bit and the fuel distribution ratio includes: determining that the vehicle is in the first operating cycle when the flag bit is true; and using the fuel distribution ratio as the opening ratio of the proportional valve within the first operating cycle to generate the target opening degree based on the opening ratio.

[0046] When the vehicle is determined to be in its first operating cycle, since the data collected by the temperature sensor is unreliable, this embodiment of the application can directly use the oil quantity distribution ratio as the oil quantity distribution ratio between the motor and the reducer, and then determine the corresponding target opening degree.

[0047] Optionally, in one embodiment of this application, determining the target opening degree by combining the flag bit and the fuel distribution ratio includes: when the flag bit is not true, obtaining the current motor temperature, the current reducer oil temperature, the current motor torque, and the current motor speed based on the motor operating data and the reducer operating data, so as to determine whether the vehicle meets the preset compensation conditions and obtain the judgment result; and determining the target opening degree by combining the judgment result and the fuel distribution ratio.

[0048] If it is determined that the vehicle is not in its first operating cycle, the embodiments of this application can determine the current motor temperature, current reducer oil temperature, current motor torque, and current motor speed through motor operating data and reducer operating data, and determine whether oil distribution ratio compensation is needed. For example, if the current motor torque exceeds a certain threshold, the motor temperature rises rapidly (there is a risk of thermal runaway), or the reducer oil temperature is below a certain threshold (it may be in a cold start condition), oil distribution ratio compensation is needed to avoid thermal runaway or to rapidly heat up the reducer to reduce the viscosity of the oil.

[0049] If temperature compensation is not required, the target opening degree can be determined directly based on the oil distribution ratio in this embodiment. Otherwise, further detailed analysis is required to determine the target opening degree.

[0050] Optionally, in one embodiment of this application, determining the target opening degree by combining the judgment result and the oil quantity distribution ratio includes: under the condition of satisfying the preset compensation conditions, matching the corresponding compensation mode based on the current motor temperature, current reducer oil temperature, current motor torque and current motor speed; based on the compensation mode, compensating and correcting the oil quantity distribution ratio to obtain the actual oil quantity distribution ratio, and determining the target opening degree based on the actual oil quantity distribution ratio.

[0051] The embodiments of this application can determine the corresponding compensation mode based on the current motor temperature, the current reducer oil temperature, the current motor torque, and the current motor speed.

[0052] For example, in the current motor torque T m Greater than the threshold or the current motor temperature TEM m During rapid rise, the matching WOT mode is determined, and K is controlled at ≥0.85 to direct most of the flow to the motor, ensuring that its peak power output is not reduced due to overheating.

[0053] At the current motor speed n m High, current motor torque T m When the temperature is moderate and stable, select the matching high-speed cruise mode and control K between 0.4 and 0.6 to balance the flow of both sides, significantly reduce the oil stirring loss in the motor cavity, and improve the overall efficiency of the system.

[0054] At the current reducer oil temperature TEM g When the flow rate is below the set value, the cold start / preheat mode is selected, and K is controlled to be less than or equal to 0.2. This directs most or even all of the flow rate to the reducer, helping it to heat up quickly and reduce viscosity, thus minimizing mechanical losses.

[0055] At the current reducer oil temperature TEM g When the flow rate is abnormally high, determine the protection mode of the reducer, decrease the K value, and increase the flow rate of the reducer branch.

[0056] Furthermore, in this embodiment, when strong energy recovery is detected, K ≥ 0.7 can be controlled to increase motor cooling in order to maintain high recovery efficiency.

[0057] Optionally, in one embodiment of this application, after obtaining the actual oil quantity distribution ratio, the method further includes: in response to the actual oil quantity ratio being consistent with the preset ratio limit value, acquiring new motor operating data and new reducer operating data; and adjusting the vehicle's oil pump speed based on the new motor operating data and new reducer operating data if the new motor operating data and new reducer operating data still meet the preset compensation conditions.

[0058] In actual operation, if the actual oil quantity ratio reaches the ratio limit (the vehicle's safe lubrication lower limit is determined, which may include the ratio upper limit and ratio lower limit), the new motor speed, motor torque, motor temperature, reducer oil temperature, and other data corresponding to the new motor operation data and the new reducer operation data are used to determine whether the compensation conditions are met again. If the compensation conditions are still met, but the oil quantity distribution ratio cannot be adjusted further, the oil pump speed can be adjusted to cool down the motor and reducer by increasing the total oil quantity.

[0059] Optionally, in one embodiment of this application, the method further includes: acquiring the oil pan temperature or ambient temperature of the vehicle; in response to the oil pan temperature or ambient temperature being lower than a preset low temperature threshold, determining the adjustment rate of the proportional valve based on the oil pan temperature or ambient temperature, so as to control the vehicle to adjust the opening of the proportional valve to a target opening based on the adjustment rate.

[0060] Understandably, when the oil pan temperature or ambient temperature is extremely low, the oil viscosity is very high and the fluidity is poor, the proportional valve opening adjustment may be subject to significant hydraulic resistance, making direct adjustment difficult.

[0061] The embodiments of this application can achieve slow adjustment at low temperatures by adjusting the adjustment rate of the proportional valve.

[0062] The matching relationship between the regulation rate and temperature can be determined by testing the proportional valve regulation rate under different low temperature conditions.

[0063] Combination Figure 3 As shown, the working principle of the vehicle control method of this application embodiment will be described in detail with reference to one embodiment.

[0064] like Figure 3 As shown, embodiments of this application may include the following steps: Step S301, Initialization.

[0065] Step S302: Collect motor operating data and reducer operating data, including collecting the current motor speed n. m Current motor torque T m Current motor temperature (TEM) m Current reducer oil temperature (TEM) g .

[0066] Step S303: Calculate the required oil volume for the motor and the reducer. Based on the collected operating data, calculate the required oil volume Qm for the motor using a lookup table. req And the required oil volume Qg for the reducer req .

[0067] Step S304: Calculate the fuel distribution ratio. .

[0068] Step S305: Determine if this is the first time the loop is running. If it is, proceed to step S306; otherwise, proceed to step S307.

[0069] Step S306: Determine the target opening of the proportional valve based on the fuel distribution ratio. If the vehicle is in its first operating cycle or the vehicle does not require fuel distribution ratio compensation, the target opening is determined directly based on the calculated fuel distribution ratio; otherwise, the target opening is determined based on the compensated actual fuel distribution ratio.

[0070] Furthermore, after adjusting the target opening, the embodiments of this application can collect running data for the next running cycle.

[0071] Step S307: Determine whether the compensation conditions are met. This includes factors such as the current motor temperature, the current reducer oil temperature, and whether the conditions are as expected. If the compensation conditions are met, proceed to step S308; otherwise, proceed to step S306.

[0072] Step S308: Compensate the oil quantity distribution ratio to determine the target opening degree of the proportional valve using the compensated actual oil quantity distribution ratio. In this embodiment, the opening degree can be determined based on the current motor speed n. m Current motor torque T m Current motor temperature (TEM) m Current reducer oil temperature (TEM) g Match the appropriate compensation mode to compensate for the oil allocation ratio.

[0073] In summary, the embodiments of this application can reduce the amount of oil in the motor oil circuit under medium and low load conditions, thereby reducing the oil churning loss of the motor and effectively increasing the efficiency of the electric drive under medium and low load conditions. Under high temperature and high load conditions, it can actively enhance the cooling of high temperature points to prevent overheating damage or performance degradation of components. During cold starts, it can directionally heat the reducer, quickly reduce the viscosity of the lubricating oil, improve energy consumption and drivability in winter, and adapt to complex and ever-changing actual driving conditions.

[0074] The vehicle control method proposed in this application can distribute the total amount of oil pumped by the oil pump to the motor and reducer proportionally by setting a proportional valve. The oil distribution ratio is calculated using the vehicle's motor and reducer operating data to achieve dynamic distribution. This reduces losses, improves system efficiency, and optimizes performance under special operating conditions such as cold starts, while ensuring motor cooling and reducer lubrication. Therefore, it solves the technical problems in related technologies where fixed throttle orifices or simple parallel oil circuits are difficult to be compatible with multiple operating conditions, leading to difficulties in balancing efficiency and heat dissipation, and easily causing insufficient or excessive local cooling.

[0075] Next, the vehicle control device according to an embodiment of this application is described with reference to the accompanying drawings.

[0076] Figure 4 This is a block diagram of a vehicle control device according to an embodiment of this application.

[0077] like Figure 4As shown, the vehicle's control device 10 includes a proportional valve. The outlet of the proportional valve is connected to both the motor and the reducer. By controlling the opening of the proportional valve, the total amount of oil pumped by the oil pump is proportionally distributed to the motor and the reducer. The device 10 includes: Specifically, the first acquisition module 100 is used to acquire the vehicle's motor operation data and reducer operation data.

[0078] The calculation module 200 is used to calculate the required oil volume for the vehicle's motor and reducer based on the motor operating data and reducer operating data.

[0079] The first control module 300 is used to calculate the oil distribution ratio of the motor based on the oil demand of the motor and the oil demand of the reducer, and adjust the opening of the proportional valve of the vehicle to the target opening degree that matches the oil distribution ratio.

[0080] Optionally, in one embodiment of this application, the vehicle control device 10 further includes: The second acquisition module is used to acquire the flag bit of the vehicle's first run marker.

[0081] The determination module is used to determine the target opening degree by combining the flag position and the oil quantity distribution ratio.

[0082] Optionally, in one embodiment of this application, the determining module includes: The first determining unit is used to determine that the vehicle is in the first running cycle when the flag bit is true.

[0083] The generation unit is used to use the oil quantity distribution ratio as the opening ratio of the proportional valve during the first operating cycle, so as to generate the target opening degree based on the opening ratio.

[0084] Optionally, in one embodiment of this application, the determining module includes: The acquisition unit is used to obtain the current motor temperature, current reducer oil temperature, current motor torque, and current motor speed based on the motor operation data and reducer operation data when the flag bit is not true, so as to determine whether the vehicle meets the preset compensation conditions and obtain the judgment result.

[0085] The second determining unit is used to determine the target opening degree by combining the judgment result and the oil quantity allocation ratio.

[0086] Optionally, in one embodiment of this application, the second determining unit includes: The calculation subunit is used to match the corresponding compensation mode based on the current motor temperature, current reducer oil temperature, current motor torque and current motor speed, under the condition that the preset compensation conditions are met.

[0087] The compensation subunit is used to compensate and correct the oil distribution ratio based on the compensation mode to obtain the actual oil distribution ratio, and then determine the target opening degree based on the actual oil distribution ratio.

[0088] Optionally, in one embodiment of this application, the vehicle control device 10 further includes: The third acquisition module is used to acquire new motor operating data and new reducer operating data when the actual oil quantity ratio is consistent with the preset ratio limit value.

[0089] The second control module is used to adjust the vehicle's oil pump speed based on the new motor operating data and the new reducer operating data, provided that the new motor operating data and the new reducer operating data still meet the preset compensation conditions.

[0090] Optionally, in one embodiment of this application, the vehicle control device 10 further includes: The fourth acquisition module is used to acquire the oil pan temperature or ambient temperature of the vehicle.

[0091] The third control module is used to respond to the oil pan temperature or ambient temperature being lower than a preset low temperature threshold, determine the adjustment rate of the proportional valve based on the oil pan temperature or ambient temperature, and control the vehicle to adjust the opening of the proportional valve to the target opening based on the adjustment rate.

[0092] It should be noted that the foregoing explanation of the vehicle control method embodiment also applies to the vehicle control device of this embodiment, and will not be repeated here.

[0093] The vehicle control device proposed in this application can distribute the total amount of oil pumped by the oil pump to the motor and reducer proportionally by setting a proportional valve. The oil distribution ratio is calculated using the vehicle's motor and reducer operating data to achieve dynamic distribution. This reduces losses, improves system efficiency, and optimizes performance under special operating conditions such as cold starts, while ensuring motor cooling and reducer lubrication. Therefore, it solves the technical problems in related technologies where fixed throttle orifices or simple parallel oil circuits are difficult to be compatible with multiple operating conditions, leading to difficulties in balancing efficiency and heat dissipation, and easily causing insufficient or excessive local cooling.

[0094] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include: The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0095] When the processor 502 executes the program, it implements the vehicle control method provided in the above embodiments.

[0096] Furthermore, the vehicle also includes: Communication interface 503 is used for communication between memory 501 and processor 502.

[0097] The memory 501 is used to store computer programs that can run on the processor 502.

[0098] Memory 501 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0099] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0100] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0101] Processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0102] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the vehicle control method described above.

[0103] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the vehicle control method provided in this embodiment of the invention.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0106] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0107] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0108] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0109] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0110] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0111] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for controlling a vehicle, characterized in that, The vehicle is equipped with a proportional valve, the outlet of which is connected to both a motor and a reducer. By controlling the opening of the proportional valve, the total amount of oil pumped by the oil pump is proportionally distributed to the motor and the reducer. The method includes the following steps: Acquire the vehicle's motor operating data and reducer operating data; Based on the motor operating data and the reducer operating data, calculate the required oil volume for the vehicle's motor and reducer. Using the oil demand of the motor and the oil demand of the reducer, the oil distribution ratio of the motor is calculated, and the opening of the proportional valve of the vehicle is adjusted to the target opening that matches the oil distribution ratio.

2. The method according to claim 1, characterized in that, Before adjusting the opening of the vehicle's proportional valve to the target opening that matches the fuel distribution ratio, the method further includes: Obtain the flag bit of the vehicle's first run marker; The target opening degree is determined by combining the flag bit and the oil quantity distribution ratio.

3. The method according to claim 2, characterized in that, Determining the target opening degree by combining the flag bit and the oil quantity distribution ratio includes: If the flag is true, the vehicle is determined to be in its first operating cycle; During the first operating cycle, the oil quantity distribution ratio is used as the opening ratio of the proportional valve to generate the target opening degree based on the opening ratio.

4. The method according to claim 2, characterized in that, Determining the target opening degree by combining the flag bit and the oil quantity distribution ratio includes: If the flag is not true, based on the motor operating data and the reducer operating data, the current motor temperature, the current reducer oil temperature, the current motor torque, and the current motor speed are obtained to determine whether the vehicle meets the preset compensation conditions and obtain the judgment result. Based on the judgment result and the oil quantity allocation ratio, the target opening degree is determined.

5. The method according to claim 4, characterized in that, The determination of the target opening degree by combining the judgment result and the oil quantity allocation ratio includes: Under the condition that the preset compensation conditions are met, a corresponding compensation mode is matched based on the current motor temperature, the current reducer oil temperature, the current motor torque, and the current motor speed; Based on the compensation mode, the oil distribution ratio is compensated and corrected to obtain the actual oil distribution ratio, and the target opening degree is determined based on the actual oil distribution ratio.

6. The method according to claim 5, characterized in that, After obtaining the actual oil allocation ratio, the following is also included: In response to the actual oil quantity ratio being consistent with the preset ratio limit value, new motor operating data and new reducer operating data are acquired; If the new motor operating data and the new reducer operating data still meet the preset compensation conditions, the oil pump speed of the vehicle is adjusted based on the new motor operating data and the new reducer operating data.

7. The method according to claim 1, characterized in that, Also includes: Obtain the oil pan temperature or ambient temperature of the vehicle; In response to the oil pan temperature or the ambient temperature being lower than a preset low temperature threshold, the adjustment rate of the proportional valve is determined based on the oil pan temperature or the ambient temperature, so as to control the vehicle to adjust the opening of the proportional valve to the target opening based on the adjustment rate.

8. A vehicle control device, characterized in that, The vehicle is equipped with a proportional valve, the outlet of which is connected to both the motor and the reducer. By controlling the opening of the proportional valve, the total amount of oil pumped by the oil pump is proportionally distributed to the motor and the reducer. The device includes: The acquisition module is used to acquire the vehicle's motor operating data and reducer operating data; The calculation module is used to calculate the required oil volume for the vehicle's motor and reducer based on the motor operating data and the reducer operating data. The control module is used to calculate the oil distribution ratio of the motor using the oil demand of the motor and the oil demand of the reducer, and adjust the opening of the proportional valve of the vehicle to a target opening that matches the oil distribution ratio.

9. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and capable of running on the processor, the processor executing the program to implement the vehicle control method as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the vehicle control method as described in any one of claims 1-7.

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