Control method and control device of dual-source steering system, storage medium, vehicle

Abstract

This application discloses a control method and control device for a dual-source steering system, a storage medium, and a vehicle. The dual-source steering system includes dual drive motors and a mechanical pump connected to the dual drive motors. The dual drive motors include a high-voltage motor and a low-voltage motor, which drive the mechanical pump. The method includes: acquiring the vehicle speed and the steering wheel angle, and controlling the high-voltage motor and the low-voltage motor based on the vehicle speed and steering angle. The control method of this application enables the low-voltage motor to participate in normal power steering under certain driving conditions, so that the low-voltage motor is no longer only used for emergency steering. This makes the high-voltage motor and the low-voltage motor redundant backups of each other, improving system reliability and reducing system energy consumption.

Description

Technical Field

[0001] This application relates to the field of steering control technology, and in particular to a control method for a dual-source steering system, a computer-readable storage medium, a vehicle, and a control device for a dual-source steering system. Background Technology

[0002] A dual-source power steering pump is a type of power steering pump designed to improve the safety and reliability of automotive steering systems. It combines high-voltage and low-voltage power supply systems to ensure steering assistance under various conditions. While this design enhances the safety of automotive steering systems and provides redundancy and reliability, it also has certain drawbacks: during normal operation, only the high-voltage motor works, while the low-voltage motor does not. The two independent power supplies and control units increase system cost and weight, occupy more space, and affect vehicle layout and energy consumption. Furthermore, in the event of high-voltage motor failure, the low-voltage motor is only used for emergency steering; in actual use, the low-voltage motor, as a backup system, essentially does not contribute to power steering, which to some extent results in a waste of components. Summary of the Invention

[0003] This application aims to at least partially solve one of the technical problems in the related art. Therefore, the first objective of this application is to propose a control method for a dual-source steering system, which acquires the vehicle speed and steering wheel angle, and controls the high-voltage motor and low-voltage motor based on the vehicle speed and steering angle. This enables the low-voltage motor to participate in normal power steering under certain driving conditions, so that the low-voltage motor is no longer only used for emergency steering. This makes the high-voltage motor and low-voltage motor redundant backups of each other, improving system reliability and reducing system energy consumption.

[0004] The second objective of this application is to provide a computer-readable storage medium.

[0005] The third objective of this application is to propose a vehicle.

[0006] The fourth objective of this application is to provide a control device for a dual-source steering system.

[0007] To achieve the above objectives, a first aspect of this application proposes a control method for a dual-source steering system. The dual-source steering system includes dual drive motors and a mechanical pump connected to the dual drive motors. The dual drive motors include a high-voltage motor and a low-voltage motor, which drive the mechanical pump. The method includes: acquiring the vehicle speed and the steering wheel angle; and controlling the high-voltage motor and the low-voltage motor based on the vehicle speed and the steering angle.

[0008] According to the control method of the dual-source steering system in this application embodiment, the vehicle speed and steering wheel angle are obtained; the high-voltage motor and the low-voltage motor are controlled based on the vehicle speed and steering angle. Therefore, this method enables the low-voltage motor to participate in normal power steering under certain driving conditions, so that the low-voltage motor is no longer only used for emergency steering. This makes the high-voltage motor and the low-voltage motor redundant backups of each other, improving system reliability and reducing system energy consumption.

[0009] In addition, the control method of the dual-source steering system according to the above embodiments of this application may also have the following additional technical features:

[0010] According to one embodiment of this application, controlling the high-voltage motor and the low-voltage motor based on the vehicle speed and the steering angle includes: controlling the high-voltage motor to stop working and controlling the low-voltage motor to start working based on the vehicle speed when the steering angle is less than or equal to a preset steering angle; controlling the high-voltage motor to start working and controlling the low-voltage motor to stop working when the steering angle is greater than the preset steering angle.

[0011] According to one embodiment of this application, the step of controlling the low-voltage motor to start working based on the vehicle speed includes: determining the vehicle speed range based on the vehicle speed; determining the operating speed of the low-voltage motor based on the vehicle speed range, wherein the larger the upper limit value corresponding to the vehicle speed range, the smaller the operating speed of the low-voltage motor.

[0012] According to one embodiment of this application, determining the operating speed of the low-voltage motor based on the vehicle speed range includes: controlling the low-voltage motor to operate at a first speed when the vehicle speed is in a first speed range; controlling the low-voltage motor to operate at a second speed when the vehicle speed is in a second speed range; and controlling the low-voltage motor to operate at a third speed when the vehicle speed is in a third speed range; wherein the first speed is greater than the second speed, the second speed is greater than the third speed, the first speed is the maximum operating speed of the low-voltage motor, the upper limit of the first speed range is less than the lower limit of the second speed range, and the upper limit of the second speed range is less than the lower limit of the third speed range.

[0013] According to one embodiment of this application, controlling the high-voltage motor to start working includes: controlling the high-voltage motor to start working at the maximum operating speed of the high-voltage motor.

[0014] According to one embodiment of this application, the high-voltage motor and the low-voltage motor are located at both ends of the steering pump and drive the steering pump respectively. The method further includes: when the high-voltage motor drives the steering pump, controlling the low-voltage motor to disconnect from the steering pump; and when the low-voltage motor drives the steering pump, controlling the high-voltage motor to disconnect from the steering pump.

[0015] According to one embodiment of this application, the method further includes: controlling the low-voltage motor to drive the mechanical pump in the event of a failure of the high-voltage motor; and controlling the high-voltage motor to drive the mechanical pump in the event of a failure of the low-voltage motor.

[0016] To achieve the above objectives, a second aspect of this application provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the control method of the dual-source steering system described above.

[0017] According to the computer-readable storage medium of the present application embodiment, by implementing the control method of the dual-source steering system described above during execution, the low-voltage motor can also participate in normal power assistance under some driving conditions, and the low-voltage motor is no longer only used for emergency steering. This makes the high-voltage motor and the low-voltage motor redundant backups of each other, improving the reliability of the system and reducing the system energy consumption.

[0018] To achieve the above objectives, a vehicle is provided in a third aspect of this application, including a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements the control method of the dual-source steering system described above.

[0019] According to the vehicle of the present application embodiment, by executing the control method of the dual-source steering system described above, the low-voltage motor can also participate in normal power assistance under some driving conditions. The low-voltage motor is no longer used only for emergency steering, so that the high-voltage motor and the low-voltage motor are redundant backups of each other, thereby improving the reliability of the system and reducing the system energy consumption.

[0020] To achieve the above objectives, a fourth aspect of this application provides a control device for a dual-source steering system. The dual-source steering system includes dual drive motors and a mechanical pump connected to the dual drive motors. The dual drive motors include a high-voltage motor and a low-voltage motor, which drive the mechanical pump. The device includes: an acquisition module for acquiring the vehicle speed and steering angle; and a control module for controlling the high-voltage motor and the low-voltage motor based on the vehicle speed and the steering angle.

[0021] According to the control device of the dual-source steering system in this application embodiment, the acquisition module is used to acquire the vehicle speed and steering angle, and the control module is used to control the high-voltage motor and the low-voltage motor based on the vehicle speed and steering angle. Therefore, this device enables the low-voltage motor to participate in normal power steering under certain driving conditions, so that the low-voltage motor is no longer only used for emergency steering. This makes the high-voltage motor and the low-voltage motor redundant backups of each other, improving system reliability and reducing system energy consumption.

[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] Figure 1 This is a flowchart of a control method for a dual-source steering system according to an embodiment of this application;

[0024] Figure 2 A flowchart illustrating a control method for a dual-source steering system according to a specific example of this application;

[0025] Figure 3 This is a block diagram of a vehicle according to an embodiment of this application;

[0026] Figure 4 This is a block diagram of the control device for a dual-source steering system according to an embodiment of this application. Detailed Implementation

[0027] 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.

[0028] The control method for a dual-source steering system, a computer-readable storage medium, a vehicle, and a control device for a dual-source steering system according to embodiments of this application are described below with reference to the accompanying drawings.

[0029] Figure 1 This is a flowchart of a control method for a dual-source steering system according to an embodiment of this application.

[0030] like Figure 1 As shown, the control method of the dual-source steering system in this application embodiment may include the following steps:

[0031] S1, obtain the vehicle speed and steering wheel angle;

[0032] S2 controls the high-voltage motor and the low-voltage motor based on vehicle speed and steering angle.

[0033] Specifically, in one embodiment of this application, the dual-source steering system includes dual drive motors and a mechanical pump connected to the dual drive motors. The dual drive motors refer to a single motor containing two independent motor drive systems: a high-voltage motor and a low-voltage motor. The high-voltage and low-voltage motors drive the mechanical pump and can be independently controlled to provide different levels of steering assistance. The mechanical pump, connected to the dual drive motors, is responsible for converting the motor's mechanical energy into hydraulic energy to provide steering assistance. The mechanical pump may include components such as a pump body, rotor, and stator, and its design and performance directly affect the magnitude and stability of the steering assistance. The high-voltage motor can be connected to the vehicle's high-voltage power supply system, such as the battery pack of an electric vehicle, and can provide greater power and torque to meet the needs of high-speed driving or when greater steering assistance is required. The low-voltage motor can be connected to the vehicle's low-voltage power supply system, such as a 12V battery, and is suitable for low-speed driving or situations requiring less steering assistance.

[0034] The dual-power steering system, through its dual-power design, can automatically switch to the other power system in the event of a failure in one system, thereby improving system reliability and safety. Furthermore, it intelligently controls the operating status of the high-voltage and low-voltage motors based on vehicle speed, steering angle, and other sensor data.

[0035] The system can acquire vehicle speed and steering wheel angle, for example, by using a vehicle speed sensor to monitor the vehicle's current speed in real time. The vehicle speed sensor can be mechanical, such as a sensor connected to the wheels or driveshaft, or electronic, such as a sensor based on wheel speed. A steering angle sensor is used to monitor the steering wheel angle. This can be a potentiometer-type sensor or a Hall effect sensor, which can provide accurate measurements of the steering wheel rotation angle. After determining the vehicle speed and steering angle, the high-voltage and low-voltage motors can be controlled accordingly. For example, when the vehicle speed is low and the steering angle is large, more steering assist may be needed; in this case, the ECU (Electronic Control Unit) will control the high-voltage motor to start working to provide additional assistance. When the vehicle speed is high but the steering angle is small, less steering assist may be needed; in this case, the ECU may control the low-voltage motor to operate at a lower speed or stop working completely to save energy.

[0036] This allows the low-voltage motor to participate in normal power steering under certain driving conditions, so that the low-voltage motor is no longer only used for emergency steering. This makes the high-voltage motor and the low-voltage motor redundant backups of each other, improving the reliability of the system and reducing the system energy consumption.

[0037] According to one embodiment of this application, controlling a high-voltage motor and a low-voltage motor based on vehicle speed and steering angle includes: controlling the high-voltage motor to stop working and controlling the low-voltage motor to start working based on the vehicle speed when the steering angle is less than or equal to a preset steering angle; controlling the high-voltage motor to start working and controlling the low-voltage motor to stop working when the steering angle is greater than the preset steering angle. The preset steering angle can be determined according to actual conditions. For example, the preset steering angle can be 5 degrees.

[0038] Specifically, when controlling the high-voltage and low-voltage motors based on vehicle speed and steering angle, the system determines the current vehicle steering angle. If the steering angle is less than or equal to a preset steering angle, it indicates that the driver is performing a small steering maneuver, which typically does not require significant steering assistance. Therefore, the high-voltage motor can be stopped to reduce energy consumption and system load. In this case, the system determines whether the low-voltage motor needs to operate based on the current vehicle speed. If the vehicle speed is low (e.g., when parked or driving at low speed), additional steering assistance may not be needed, so the low-voltage motor can remain stationary. If the vehicle speed is high, even with a small steering angle, some steering assistance may be required to ensure steering stability and precision; therefore, the system will control the low-voltage motor to operate.

[0039] When the steering angle exceeds a preset steering angle, the high-voltage motor can be activated, while the low-voltage motor can be deactivated. In other words, if the driver is performing a significant steering maneuver, which typically requires more steering assistance, the system will activate the high-voltage motor to provide sufficient steering assistance, ensuring steering stability and safety. Deactivating the low-voltage motor reduces energy consumption and system load, while avoiding unnecessary energy waste.

[0040] This ensures that appropriate steering assistance is provided under various driving conditions, thereby optimizing the driving experience and making driving easier and more comfortable. By intelligently controlling the working state of the motor, the load on the steering system can be reduced, the system's service life can be extended, and maintenance costs can be reduced.

[0041] According to one embodiment of this application, controlling the low-voltage motor to start working based on vehicle speed includes: determining the vehicle speed range based on the vehicle speed; determining the operating speed of the low-voltage motor based on the vehicle speed range, wherein the larger the upper limit value corresponding to the vehicle speed range, the smaller the operating speed of the low-voltage motor.

[0042] Specifically, when controlling the low-voltage motor to start working based on vehicle speed, the vehicle speed range can be determined. After determining the speed range, the operating speed of the low-voltage motor can be determined accordingly. Different speed ranges correspond to different operating speeds of the low-voltage motor; the larger the upper limit of the speed range, the lower the operating speed of the low-voltage motor. For example, the vehicle speed can be divided into different ranges. These ranges can be preset, such as 0-20 km / h, 20-40 km / h, 40-60 km / h, etc., or customized according to the specific performance and needs of the vehicle. The vehicle speed sensor can monitor the vehicle's current speed in real time and determine the vehicle's current speed range.

[0043] The low-voltage motor operates at different speeds depending on the vehicle speed range. Specifically, as the upper limit of the speed range increases, the low-voltage motor's operating speed decreases accordingly. This is because at higher speeds, the demand for steering assist may decrease, thus eliminating the need for the low-voltage motor to operate at higher speeds. The operating speed of the low-voltage motor can be adjusted via the electronic control unit (ECU). The ECU calculates and controls the motor speed based on the input signal from the vehicle speed sensor and a preset control strategy. Therefore, by adjusting the low-voltage motor's operating speed according to vehicle speed, energy consumption can be reduced under high-speed driving conditions where significant steering assist is not required, thereby improving the vehicle's overall energy efficiency. This ensures appropriate steering assist is provided under various speed conditions, optimizing the driving experience and making driving easier and more comfortable.

[0044] According to one embodiment of this application, determining the operating speed of a low-voltage motor based on a vehicle speed range includes: controlling the low-voltage motor to operate at a first speed when the vehicle speed is in a first speed range; controlling the low-voltage motor to operate at a second speed when the vehicle speed is in a second speed range; and controlling the low-voltage motor to operate at a third speed when the vehicle speed is in a third speed range. The first speed is greater than the second speed, the second speed is greater than the third speed, the first speed is the maximum operating speed of the low-voltage motor, the upper limit of the first speed range is less than the lower limit of the second speed range, and the upper limit of the second speed range is less than the lower limit of the third speed range.

[0045] Specifically, when determining the operating speed of the low-voltage motor based on the vehicle speed range, the speed range described for the current vehicle speed is judged. For example, the speed range of 0-20 km / h can be designated as the first speed range, the speed range of 20-60 km / h as the second speed range, and the speed range of speeds greater than 60 km / h as the third speed range. Thus, when the vehicle speed is within the first speed range, such as 15 km / h, the low-voltage motor can be controlled to operate at a first speed, which is the maximum operating speed of the low-voltage motor. Then, the speed range within which the current vehicle speed falls is judged. If the vehicle speed is within the second speed range, such as 40 km / h, the low-voltage motor can be controlled to operate at a second speed, which is less than the first speed, and can be 80% of the maximum operating speed of the low-voltage motor. The system determines the current vehicle speed range. If the vehicle speed is in the third speed range, such as 100km / h, the low-voltage motor can be controlled to operate at the third speed, which is less than the second speed. For example, the third speed can be 50% of the maximum operating speed of the low-voltage motor.

[0046] Therefore, by adjusting the operating speed of the low-voltage motor according to the vehicle speed, appropriate steering assistance can be provided under different vehicle speed conditions, while reducing unnecessary energy consumption, thereby optimizing the driving experience and making driving easier and more comfortable.

[0047] According to one embodiment of this application, controlling a high-voltage motor to start working includes: controlling the high-voltage motor to start working at the maximum operating speed of the high-voltage motor.

[0048] Specifically, when the steering angle exceeds the preset steering angle, the high-voltage motor activates and operates at its maximum speed to quickly provide the necessary steering assistance, especially in situations requiring rapid, large-angle steering, such as emergency maneuvers or sudden turns at high speeds. Furthermore, larger steering angles typically mean the driver needs more steering assistance to control the vehicle; the high-voltage motor's maximum speed ensures sufficient assistance in these critical moments, thereby improving driving safety. This enhances the steering system's response speed and safety, optimizes energy efficiency, reduces system load, and improves the overall driving experience.

[0049] According to one embodiment of this application, a high-voltage motor and a low-voltage motor are located at both ends of the steering pump and drive the steering pump respectively. The control method of the dual-source steering system further includes: when the high-voltage motor drives the steering pump, controlling the low-voltage motor to disconnect from the steering pump; and when the low-voltage motor drives the steering pump, controlling the high-voltage motor to disconnect from the steering pump.

[0050] Specifically, the system determines whether the steering pump is driven by a high-voltage motor or a low-voltage motor. If the high-voltage motor is driving the steering pump, the low-voltage motor can be disconnected from it, thus reducing energy loss. Disconnection can be achieved through mechanical or electronic control methods, such as using a clutch or electronic control unit to control the connection status between the motor and the pump.

[0051] When the high-voltage motor malfunctions or the system determines that switching to the low-voltage motor is necessary based on operating conditions, the low-voltage motor will be activated to drive the steering pump. In this mode, the high-voltage motor does not participate in driving the steering pump. In this case, it is necessary to disconnect the high-voltage motor from the steering pump to reduce energy loss and ensure efficient system operation when needed. This disconnection can be achieved through mechanical or electronic control methods to ensure efficient system operation under various conditions.

[0052] Therefore, by flexibly switching the operating states of high and low voltage motors and controlling the disconnection of motors not involved in operation from the steering pump, the aim is to improve the efficiency and reliability of the system while reducing energy consumption and system complexity.

[0053] According to one embodiment of this application, the control method of the dual-source steering system further includes: controlling the low-voltage motor to drive the mechanical pump in the event of a high-voltage motor failure; and controlling the high-voltage motor to drive the mechanical pump in the event of a low-voltage motor failure.

[0054] Specifically, the operation of the high-voltage motor is monitored in real time. In the event of a high-voltage motor failure, the low-voltage motor can be controlled to drive the mechanical pump. For example, if the high-voltage motor cannot obtain voltage from the power battery or the high-voltage line is damaged, it will automatically switch to the low-voltage steering pump operating mode. In this mode, the low-voltage motor is activated and begins to drive the mechanical pump to provide steering assistance. This switching is automatic and does not require any operation from the driver, ensuring the continuity and safety of the steering system.

[0055] Similarly, the operation of the low-voltage motor is monitored in real time. In the event of a failure of the low-voltage motor, the high-voltage motor can be controlled to drive the mechanical pump. That is, the high-voltage motor will be activated and start driving the mechanical pump to provide steering assistance. This design ensures that even if one motor fails, the other motor can take over the work, thereby improving the redundancy and reliability of the system and providing the driver with a safer and more comfortable driving experience.

[0056] The following is combined Figure 2 This describes the control method of this application.

[0057] As a specific example, the control method of the dual-source steering system of this application may include the following steps:

[0058] S101, obtain the vehicle speed and steering wheel angle.

[0059] S102, determine whether the steering angle is less than or equal to the preset steering angle. If yes, proceed to step S103; if no, proceed to step S110.

[0060] S103 controls the high-voltage motor to stop working and determines the vehicle speed range.

[0061] S104. Determine if the vehicle speed is within the first speed range. If yes, proceed to step S105; otherwise, proceed to step S106.

[0062] S105 controls the low-voltage motor to operate at the first speed.

[0063] S106, Determine if the vehicle speed is within the second speed range. If yes, proceed to step S107; otherwise, proceed to step S108.

[0064] S107 controls the low-voltage motor to operate at the second speed.

[0065] S108, determine whether the vehicle speed is within the third speed range. If yes, proceed to step S109; if no, proceed to step S103.

[0066] S109 controls the low-voltage motor to operate at the third speed.

[0067] S110, determine whether the steering angle is greater than the preset steering angle. If yes, proceed to step S111; if no, proceed to step S101.

[0068] S111 controls the high-voltage motor to start working at its maximum operating speed and controls the low-voltage motor to stop working.

[0069] In summary, the control method for the dual-source steering system according to the embodiments of this application obtains the vehicle speed and the steering wheel angle; and controls the high-voltage motor and the low-voltage motor based on the vehicle speed and steering angle. Therefore, this method enables the low-voltage motor to participate in normal power steering under certain driving conditions, so that the low-voltage motor is no longer only used for emergency steering. This makes the high-voltage motor and the low-voltage motor redundant backups of each other, improving system reliability and reducing system energy consumption.

[0070] Corresponding to the above embodiments, this application also proposes a computer-readable storage medium.

[0071] The computer-readable storage medium of this application embodiment stores a program that, when executed by a processor, implements the control method of the dual-source steering system described above.

[0072] According to the computer-readable storage medium of the embodiments of this application, by executing the control method of the dual-source steering system described above, the low-voltage motor can also participate in normal power assistance under some driving conditions. The low-voltage motor is no longer used only for emergency steering, so that the high-voltage motor and the low-voltage motor are redundant backups of each other, thereby improving the reliability of the system and reducing the system energy consumption.

[0073] Corresponding to the above embodiments, this application also proposes a vehicle.

[0074] like Figure 3 As shown, the vehicle 200 in this embodiment may include: a memory 210, a processor 220, and a program stored in the memory 210 and executable on the processor 220. When the processor 220 executes the program, it implements the control method of the dual-source steering system described above.

[0075] According to the vehicle of the present application embodiment, by executing the control method of the dual-source steering system described above, the low-voltage motor can also participate in normal power assistance under some driving conditions. The low-voltage motor is no longer used only for emergency steering, so that the high-voltage motor and the low-voltage motor are redundant backups of each other, thereby improving the reliability of the system and reducing the system energy consumption.

[0076] Corresponding to the above embodiments, this application also proposes a control device for a dual-source steering system.

[0077] like Figure 4 As shown, the control device 100 of the dual-source steering system in this application embodiment includes: an acquisition module 110 and a control module 120.

[0078] The acquisition module 110 is used to acquire the vehicle speed and steering angle. The control module 120 is used to control the high-voltage motor and the low-voltage motor based on the vehicle speed and steering angle.

[0079] According to one embodiment of this application, the control module 120 controls the high-voltage motor and the low-voltage motor based on vehicle speed and steering angle, specifically for: controlling the high-voltage motor to stop working when the steering angle is less than or equal to a preset steering angle, and controlling the low-voltage motor to start working based on the vehicle speed; and controlling the high-voltage motor to start working when the steering angle is greater than the preset steering angle, and controlling the low-voltage motor to stop working.

[0080] According to one embodiment of this application, the control module 120 controls the low-voltage motor to start working based on the vehicle speed, specifically for: determining the vehicle speed range based on the vehicle speed; and determining the operating speed of the low-voltage motor based on the vehicle speed range, wherein the larger the upper limit value corresponding to the vehicle speed range, the smaller the operating speed of the low-voltage motor.

[0081] According to one embodiment of this application, the control module 120 determines the operating speed of the low-voltage motor based on the vehicle speed range, specifically for: controlling the low-voltage motor to operate at a first speed when the vehicle speed is in a first speed range; controlling the low-voltage motor to operate at a second speed when the vehicle speed is in a second speed range; and controlling the low-voltage motor to operate at a third speed when the vehicle speed is in a third speed range; wherein the first speed is greater than the second speed, the second speed is greater than the third speed, the first speed is the maximum operating speed of the low-voltage motor, the upper limit of the first speed range is less than the lower limit of the second speed range, and the upper limit of the second speed range is less than the lower limit of the third speed range.

[0082] According to one embodiment of this application, the control module 120 controls the high-voltage motor to start working, specifically for: controlling the high-voltage motor to start working at the maximum operating speed of the high-voltage motor.

[0083] According to one embodiment of this application, a high-voltage motor and a low-voltage motor are located at both ends of the steering pump and drive the steering pump respectively. The control module 120 is also used to: control the low-voltage motor to disconnect from the steering pump when the high-voltage motor drives the steering pump; and control the high-voltage motor to disconnect from the steering pump when the low-voltage motor drives the steering pump.

[0084] According to one embodiment of this application, the control module 120 is further configured to: control the low-voltage motor to drive the mechanical pump in the event of a high-voltage motor failure; and control the high-voltage motor to drive the mechanical pump in the event of a low-voltage motor failure.

[0085] It should be noted that for details not disclosed in the control device of the dual-source steering system in the embodiments of this application, please refer to the details disclosed in the control method of the dual-source steering system in the embodiments of this application, which will not be repeated here.

[0086] According to the control device of the dual-source steering system in this application embodiment, the acquisition module is used to acquire the vehicle speed and steering angle, and the control module is used to control the high-voltage motor and the low-voltage motor based on the vehicle speed and steering angle. Therefore, this device enables the low-voltage motor to participate in normal power steering under certain driving conditions, so that the low-voltage motor is no longer only used for emergency steering. This makes the high-voltage motor and the low-voltage motor redundant backups of each other, improving system reliability and reducing system energy consumption.

[0087] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced 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, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0088] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple 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.

[0089] 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.

[0090] 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, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0091] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0092] 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 control method for a dual-source steering system, characterized in that, The dual-source steering system includes dual drive motors and a mechanical pump connected to the dual drive motors. The dual drive motors include a high-voltage motor and a low-voltage motor, which drive the mechanical pump. The method includes: Obtain the vehicle's speed and steering wheel angle; The high-voltage motor and the low-voltage motor are controlled based on the vehicle speed and the steering angle.

2. The control method for the dual-source steering system according to claim 1, characterized in that, The control of the high-voltage motor and the low-voltage motor based on the vehicle speed and the steering angle includes: When the steering angle is less than or equal to the preset steering angle, the high-voltage motor is controlled to stop working, and the low-voltage motor is controlled to start working based on the vehicle speed; When the steering angle is greater than the preset steering angle, the high-voltage motor is controlled to start working, and the low-voltage motor is controlled to stop working.

3. The control method for the dual-source steering system according to claim 2, characterized in that, The step of controlling the low-voltage motor to start working based on the vehicle speed includes: The vehicle speed range is determined based on the vehicle speed. The operating speed of the low-voltage motor is determined based on the vehicle speed range, wherein the larger the upper limit value of the vehicle speed range, the smaller the operating speed of the low-voltage motor.

4. The control method for the dual-source steering system according to claim 3, characterized in that, Determining the operating speed of the low-voltage motor based on the vehicle speed range includes: When the vehicle speed is within the first vehicle speed range, the low-voltage motor is controlled to operate at the first speed. When the vehicle speed is within the second speed range, the low-voltage motor is controlled to operate at the second speed. When the vehicle speed is in the third speed range, the low-voltage motor is controlled to operate at the third speed. Wherein, the first speed is greater than the second speed, the second speed is greater than the third speed, the first speed is the maximum operating speed of the low-voltage motor, the upper limit of the first speed range is less than the lower limit of the second speed range, and the upper limit of the second speed range is less than the lower limit of the third speed range.

5. The control method for the dual-source steering system according to claim 2, characterized in that, The control of the high-voltage motor to start working includes: The high-voltage motor is controlled to start working at its maximum operating speed.

6. The control method for the dual-source steering system according to claim 1, characterized in that, The high-voltage motor and the low-voltage motor are located at opposite ends of the steering pump, respectively driving the steering pump. The method further includes: When the high-voltage motor drives the steering pump, the low-voltage motor is disconnected from the steering pump. When the low-voltage motor drives the steering pump, the high-voltage motor is disconnected from the steering pump.

7. The control method for a dual-source steering system according to claim 1, characterized in that, The method further includes: In the event of a failure of the high-voltage motor, the low-voltage motor is controlled to drive the mechanical pump. In the event of a failure of the low-voltage motor, the high-voltage motor is controlled to drive the mechanical pump.

8. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the control method of the dual-source steering system according to any one of claims 1-7.

9. A vehicle, characterized in that, include: The system includes a memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the control method for the dual-source steering system according to any one of claims 1-7.

10. A control device for a dual-source steering system, characterized in that, The dual-source steering system includes dual drive motors and a mechanical pump connected to the dual drive motors. The dual drive motors include a high-voltage motor and a low-voltage motor, which drive the mechanical pump. The device includes: The acquisition module is used to acquire the vehicle's speed and steering angle; The control module is used to control the high-voltage motor and the low-voltage motor based on the vehicle speed and the steering angle.

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