Emergency steering test method, power-assisted steering control system and vehicle

Abstract

The invention provides an emergency steering test method, a power-assisted steering control system and a vehicle. The power-assisted steering control system comprises a steering motor high-voltage winding, a steering motor low-voltage winding, a steering oil pump high-voltage controller and an emergency steering low-voltage controller, and the power-assisted steering control system has a high-voltage steering working mode and an emergency steering working mode which can be switched. The method comprises the steps that when an emergency steering test needs to be conducted on a vehicle, a VCU forced low-pressure steering enabling switch is controlled to be turned on; and when a key ON gear signal is received and the vehicle speed is greater than a preset vehicle speed threshold value, the connection between the steering oil pump high-voltage controller and the steering motor high-voltage winding is controlled to be cut off, the emergency steering low-voltage controller is controlled to be connected with the steering motor low-voltage winding, and an emergency steering working mode is switched to perform an emergency steering test on the vehicle. According to the invention, emergency steering testing can be carried out on the vehicle in advance according to needs.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an emergency steering test method, a power steering control system and a vehicle. Background Art

[0002] When an emergency fault such as battery burning occurs in the vehicle, the VCU (vehicle control unit) will immediately cut off the Class B high voltage electricity. At this time, the vehicle instantly loses steering power, and the driver's steering wheel is heavy or almost impossible to operate, posing a safety hazard. With the full implementation of GB 38032-2020 "Safety Requirements for Electric Buses", most bus companies have adopted power steering control systems equipped with emergency low-voltage steering functions, which can provide power backup in emergencies and provide emergency steering assistance for the vehicle when the high-voltage power supply is not powered, thereby solving the problem of "when the vehicle is driving and an abnormal situation occurs that requires the vehicle to cut off the Class B high voltage electricity, the steering system should be kept in the power-assisted state or at least the steering-assisted state should be kept for 30 seconds when the vehicle speed is greater than 5km / h."

[0003] However, due to the low probability of "vehicle abnormalities that require the entire vehicle to be disconnected from Class B high voltage electricity" during actual use, the probability of a shutdown failure of the steering oil pump high-voltage controller in the power steering control system is low, resulting in a low probability of the emergency steering low-voltage controller being activated. Therefore, the emergency steering function is generally not tested before the vehicle leaves the factory, or it is difficult to simulate a high-voltage steering failure to start the emergency steering, so it is unclear how effective the emergency steering function is. The power steering control systems of existing vehicles will only enter the emergency steering working mode when a high-voltage steering failure actually occurs. However, since the vehicle has not undergone preliminary testing and verification, it cannot be guaranteed that the emergency steering working mode will be able to respond in a timely manner during actual operation. Therefore, it is easy to cause the risk of not being able to activate when emergency steering is actually needed. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an emergency steering test method, a power steering control system and a vehicle, which can perform an emergency steering test on the vehicle in advance as needed.

[0005] One aspect of an embodiment of the present application provides an emergency steering test method for a power steering control system. The power steering control system includes a steering motor high-voltage winding, a steering motor low-voltage winding, a steering oil pump high-voltage controller for controlling the steering motor high-voltage winding, and an emergency steering low-voltage controller for controlling the steering motor low-voltage winding. The power steering control system has a switchable high-voltage steering working mode and an emergency steering working mode. The method includes: when an emergency steering test is required for the vehicle, controlling the VCU to force the low-voltage steering enable switch to turn on; when a key ON gear signal is received and the vehicle speed is greater than a predetermined vehicle speed threshold, controlling the connection between the steering oil pump high-voltage controller and the steering motor high-voltage winding to be cut off, and controlling the emergency steering low-voltage controller to be connected to the steering motor low-voltage winding, switching into the emergency steering working mode to perform an emergency steering test on the vehicle.

[0006] Furthermore, the method further includes: when a shutdown condition of the emergency steering is met, controlling the emergency steering low-voltage controller to be disconnected from the low-voltage winding of the steering motor to cut off the emergency steering working mode.

[0007] Further, when the emergency steering working mode works for a predetermined time or the vehicle speed is less than or equal to the predetermined vehicle speed threshold, it is determined that the closing condition of the emergency steering is met.

[0008] Furthermore, the method also includes: after cutting off the emergency steering working mode, if the start condition of high-pressure steering is met, controlling the steering oil pump high-pressure controller to be connected to the steering motor high-pressure winding to switch to the high-pressure steering working mode.

[0009] Further, controlling the VCU to force the low-pressure steering enable switch to turn on includes: using a rain and snow mode switch of the vehicle, and triggering the VCU to force the low-pressure steering enable switch to turn on by pressing the rain and snow mode switch a predetermined number of times within a predetermined time.

[0010] Another aspect of the embodiment of the present application provides a power steering control system. The power steering control system includes a vehicle controller, a high-voltage winding of a steering motor, a low-voltage winding of a steering motor, a high-voltage controller of a steering oil pump for controlling the high-voltage winding of the steering motor, and an emergency steering low-voltage controller for controlling the low-voltage winding of the steering motor. The power steering control system has a switchable high-voltage steering working mode and an emergency steering working mode. In the high-voltage steering working mode, the high-voltage controller of the steering oil pump is connected to the high-voltage winding of the steering motor, and the emergency steering low-voltage controller is disconnected from the low-voltage winding of the steering motor; in the emergency steering working mode, the emergency steering low-voltage controller is connected to the low-voltage winding of the steering motor, and the high-voltage controller of the steering oil pump is disconnected from the high-voltage winding of the steering motor. Among them, the vehicle controller is used to control the connection between the steering oil pump high-voltage controller and the steering motor high-voltage winding to be cut off, and control the emergency steering low-voltage controller to be connected to the steering motor low-voltage winding when the key ON signal is received and the vehicle speed is greater than a predetermined vehicle speed threshold when the VCU forced low-voltage steering enable switch is turned on, and switch to the emergency steering working mode to perform an emergency steering test on the vehicle.

[0011] Furthermore, the vehicle controller is also used to control the emergency steering low-voltage controller to disconnect from the steering motor low-voltage winding to cut off the emergency steering working mode when the emergency steering shutdown condition is met.

[0012] Further, when the emergency steering working mode is operated for a predetermined time or the vehicle speed is less than or equal to the predetermined vehicle speed threshold, the vehicle controller determines that the shutdown condition of the emergency steering is met.

[0013] Furthermore, the vehicle controller is also used to control the steering oil pump high-pressure controller to connect with the steering motor high-pressure winding to switch to the high-pressure steering working mode after cutting off the emergency steering working mode if the start conditions of the high-pressure steering are met.

[0014] Furthermore, the vehicle controller is used to receive an on signal of the VCU forced low-voltage steering enable switch which is triggered when the rain and snow mode switch of the vehicle is pressed a predetermined number of times within a predetermined time.

[0015] Another aspect of the embodiments of the present application provides a vehicle, wherein the vehicle includes the power steering control system as described above.

[0016] The emergency steering test method, power steering control system and vehicle of one or more embodiments of the present application can utilize the VCU forced low-voltage steering enable switch to formulate corresponding control strategies to perform "forced low-voltage steering enablement" on the power steering control system of the entire vehicle. As a result, the vehicle can be tested for emergency steering in advance according to actual needs, and there is no need to simulate a high-voltage steering failure to start the emergency steering function. The application is popularizable and easy to operate.

[0017] The emergency steering test method of the power steering control system of one or more embodiments of the present application can perform emergency steering tests on the vehicle in advance as needed to ensure the effectiveness of the emergency steering function, so that when a high-voltage steering failure occurs during actual use, the emergency steering function can be enabled in time to ensure timely response of the emergency steering and improve the active safety performance of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a power steering control system in a high-pressure steering working mode according to an embodiment of the present application.

[0019] Figure 2 This is a schematic diagram of a power steering control system in an emergency steering working mode according to an embodiment of the present application.

[0020] Figure 3 This is a flow chart of an emergency steering test method for a power steering control system according to an embodiment of the present application.

[0021] Figure 4 This is a flow chart of an emergency steering test method for a power steering control system according to another embodiment of the present application. DETAILED DESCRIPTION

[0022] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0023] The emergency steering test method and power steering control system of the power steering control system provided by the present application can force the actual vehicle to undergo an emergency steering test in advance before an actual high-voltage steering failure occurs in the vehicle, for example, before the vehicle leaves the factory or when the certification is announced, that is, the high-voltage steering is forcibly cut off and switched to the emergency steering, and the actual vehicle is forced to run the emergency steering working mode in advance, so as to check in advance whether the emergency steering function of the actual vehicle can respond normally, so as to ensure that the actual vehicle can respond in time when emergency steering is actually needed. In other words, the emergency steering test method of the power steering control system of the present application is not a "preparation" before the product goes online, but a test for a formal automobile product (i.e., an actual vehicle), and the purpose of the test is to check whether the emergency steering function equipped on the actual vehicle can respond normally and in time.

[0024] The emergency steering test method of the power steering control system, the power steering control system and the vehicle of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0025] The present application provides a power steering control system. Figure 1 and Figure 2 The working principle diagram of the power steering control system 100 of one embodiment of the present application is disclosed. Figure 1 and Figure 2 As shown, a power steering control system 100 of an embodiment of the present application may be, for example, an electric hydraulic power steering control system, which includes a power steering control device 110, a power steering power supply device 120 and a power steering actuator 130, wherein the power steering power supply device 120 is electrically connected to the power steering control device 110, and the power steering control device 110 is fixedly connected to the power steering actuator 130.

[0026] The power steering control device 110 includes a vehicle control unit (VCU) 111, a steering oil pump high-voltage controller 112, an emergency steering low-voltage controller 114, a steering motor high-voltage winding 113, and a steering motor low-voltage winding 115. The steering motor high-voltage winding 113 and the steering motor low-voltage winding 115 are both installed inside the steering motor.

[0027] The vehicle controller 111 is respectively connected to the steering oil pump high pressure controller 112 and the emergency steering low pressure controller 114. For example, the vehicle controller 111 can be respectively connected to the steering oil pump high pressure controller 112 and the emergency steering low pressure controller 114 via a CAN (Controller Area Network) bus.

[0028] The steering oil pump high-voltage controller 112 is electrically connected to the power steering power supply device 120, and the power steering power supply device 120 can be used to supply power to the steering oil pump high-voltage controller 112. The steering oil pump high-voltage controller 112 is connected to the steering motor high-voltage winding 113 and can be used to control the steering motor high-voltage winding 113.

[0029] The emergency steering low voltage controller 114 is electrically connected to the power steering power supply device 120, and the power steering power supply device 120 can be used to supply power to the emergency steering low voltage controller 114. The emergency steering low voltage controller 114 is connected to the steering motor low voltage winding 115 and can be used to control the steering motor low voltage winding 115.

[0030] In some embodiments, the power steering power supply device 120 may include a high voltage power supply 121 and an emergency steering low voltage power supply 122. The high voltage power supply 121 is electrically connected to the steering oil pump high voltage controller 112, and the emergency steering low voltage power supply 122 is electrically connected to the emergency steering low voltage controller 114.

[0031] The high-voltage winding 113 of the steering motor and the low-voltage winding 115 of the steering motor are fixedly connected to the power steering actuator 130. In some embodiments, the power steering actuator 130 may include a steering oil tank 131, a steering oil pump 132, a steering motor, a steering gear 133 and a steering wheel 134. The main function of the steering oil tank 131 is to store, filter and cool the working oil. The steering oil tank 131 is fixedly connected to one end of the steering oil pump 132 through an oil pipe, and the other end of the steering oil pump 132 is fixedly connected to the steering gear 133 through an oil pipe. The steering motor and the steering oil pump 132 work together to provide power for the power steering control system 100 to improve the response speed and power effect of the system. The steering oil pump 132 pumps the output high-pressure oil into the steering gear 133, drives the transmission mechanism inside the steering gear 133 to move, and the steering gear 133 is connected to the steering wheel 134 through a universal joint, thereby providing hydraulic power for the steering wheel 134 operated by the driver.

[0032] The power steering control system 100 of the present application has a high-pressure steering working mode and an emergency steering working mode. The power steering control system 100 of the present application can be switched between the high-pressure steering working mode and the emergency steering working mode.

[0033] like Figure 1 As shown, in the high-voltage steering working mode, the steering oil pump high-voltage controller 112 is connected to the steering motor high-voltage winding 113, and the steering motor high-voltage winding 113 is controlled by the steering oil pump high-voltage controller 112 to work. At this time, the emergency steering low-voltage controller 114 is disconnected from the steering motor low-voltage winding 115, and the low voltage does not participate in the work.

[0034] like Figure 2 As shown, in the emergency steering working mode, the emergency steering low-voltage controller 114 is connected to the steering motor low-voltage winding 115, and the emergency steering low-voltage controller 114 controls the steering motor low-voltage winding 115 to work. At this time, the steering oil pump high-voltage controller 112 is disconnected from the steering motor high-voltage winding 113, and the high voltage does not participate in the work.

[0035] The main working principle of the power steering control system 100 of the present application is as follows:

[0036] Under normal circumstances, the steering oil pump high pressure controller 112 operates at a given frequency, and the emergency steering low pressure controller 114 does not operate at this time. Figure 1 The solid line process shown performs high-pressure steering control.

[0037] When an emergency steering test is required for the vehicle, such as an emergency steering test before the vehicle leaves the factory or during the certification announcement, the VCU forced low-voltage steering enable switch can be activated. In one embodiment, the rain and snow mode switch on the existing vehicle dashboard can be used, and the vehicle system can be pre-set to press the rain and snow mode switch a predetermined number of times within a predetermined time to trigger the VCU forced low-voltage steering enable switch to turn on. For example, it can be set to press the rain and snow mode switch 10 times within 20 seconds to trigger the VCU forced low-voltage steering enable switch to turn on.

[0038] Therefore, when the vehicle's rain and snow mode switch is pressed a predetermined number of times within a predetermined time, the VCU forced low-pressure steering enable switch is triggered to turn on. At this time, the vehicle controller 111 can receive the turn-on signal of the VCU forced low-pressure steering enable switch.

[0039] In the case where the VCU forced low-voltage steering enable switch is turned on, when the vehicle controller 111 receives the key ON signal and the received vehicle speed signal is greater than the predetermined vehicle speed threshold, the connection between the steering oil pump high-voltage controller 112 and the steering motor high-voltage winding 113 is controlled to be cut off, and the emergency steering low-voltage controller 114 is controlled to be connected to the steering motor low-voltage winding 115, and the emergency steering working mode is switched on. Figure 2 The solid line process shown performs emergency steering control, so that the vehicle can be tested for emergency steering in advance. After the emergency steering is turned on, the steering oil pump high pressure controller 112 is disconnected to form an interlocking relationship.

[0040] After the emergency steering is turned on, when the shutdown condition of the emergency steering is met, the vehicle controller 111 can also control the emergency steering low-voltage controller 114 to disconnect the steering motor low-voltage winding 115, thereby cutting off the emergency steering working mode. In one embodiment, when the emergency steering working mode works for a predetermined time or the vehicle speed is less than or equal to a predetermined vehicle speed threshold, the vehicle controller 111 can determine that the shutdown condition of the emergency steering is met. For example, when the emergency steering works for 60s or the vehicle speed is ≤5km / h, the vehicle controller 111 can automatically cut off the emergency steering.

[0041] After the emergency steering working mode is cut off, if the high-voltage steering start condition is met, the vehicle controller 111 can also control the steering oil pump high-voltage controller 112 to connect with the steering motor high-voltage winding 113, thereby switching to the emergency steering working mode. Figure 1 If the high-pressure steering operating mode is not satisfied at this time, the vehicle controller 111 controls both the high-pressure steering and the emergency steering to stop working.

[0042] After the emergency steering test is completed and the vehicle is powered on again, the vehicle returns to normal power steering mode.

[0043] The power steering control system 100 of the present application utilizes the VCU forced low-pressure steering enable switch and formulates corresponding control strategies to perform "forced low-pressure steering enablement" on the power steering control system of the entire vehicle. As a result, the vehicle can be tested for emergency steering in advance according to actual needs, and there is no need to simulate a high-pressure steering failure to start the emergency steering function. The system is popularizable and easy to operate.

[0044] The power steering control system 100 of the present application can ensure the effectiveness of the emergency steering function, so that when a high-voltage steering failure occurs during actual use, the emergency steering function can be enabled in a timely manner, thereby ensuring a timely response to the emergency steering and improving the active safety performance of the entire vehicle.

[0045] The present application also provides an emergency steering test method for a power steering control system 100. The power steering control system 100 includes a steering motor high voltage winding 113, a steering motor low voltage winding 115, a steering oil pump high voltage controller 112 for controlling the steering motor high voltage winding 113, and an emergency steering low voltage controller 114 for controlling the steering motor low voltage winding 115. The power steering control system 100 has a switchable high voltage steering working mode and an emergency steering working mode.

[0046] Figure 3 The flowchart of the emergency steering test method of the power steering control system 100 according to one embodiment of the present application is disclosed. Figure 3As shown, the emergency steering test method of the power steering control system 100 according to one embodiment of the present application may include steps S11 to S15.

[0047] In step S11, an emergency steering test needs to be performed on the vehicle.

[0048] In step S12, when an emergency steering test is required for the vehicle, the VCU is controlled to force the low-voltage steering enable switch to turn on.

[0049] For example, the vehicle's rain and snow mode switch may be used to trigger the VCU to force the low-voltage steering enable switch to turn on by pressing the vehicle's rain and snow mode switch a predetermined number of times within a predetermined time.

[0050] In step S13, it is determined whether a key-ON signal and a vehicle speed signal greater than a predetermined vehicle speed threshold are received. If the result of the determination is "yes", the process proceeds to step S14. Otherwise, the process returns to continue monitoring and determination.

[0051] In step S14, when the key ON signal is received and the vehicle speed is greater than a predetermined vehicle speed threshold, the connection between the steering oil pump high-voltage controller 112 and the steering motor high-voltage winding 113 is cut off, and the emergency steering low-voltage controller 114 is connected to the steering motor low-voltage winding 115. Then, the process enters step S15.

[0052] In step S15, the emergency steering working mode is switched to perform an emergency steering test on the vehicle.

[0053] Figure 4 A flow chart of an emergency steering test method of a power steering control system 100 according to another embodiment of the present application is disclosed. Figure 4 As shown, in some embodiments, after entering the emergency steering working mode in step S15, the emergency steering test method of the power steering control system 100 of the present application may further include step S21 and step S22.

[0054] In step S21, it is determined whether the emergency steering shutdown condition is met. If the result of the determination is "yes", the process proceeds to step S22. Otherwise, the process returns to continue monitoring and determination.

[0055] In step S22, when the emergency steering shutdown condition is met, the emergency steering low voltage controller 114 is controlled to be disconnected from the steering motor low voltage winding 115 to cut off the emergency steering working mode.

[0056] In one embodiment, when the emergency steering working mode is operated for a predetermined time or the vehicle speed is less than or equal to a predetermined vehicle speed threshold, it can be determined that the emergency steering shutdown condition is met.

[0057] Continue to refer to Figure 4 In some embodiments, after the emergency steering working mode is cut off, the emergency steering test method of the power steering control system 100 of the present application may further include steps S23 to S25.

[0058] In step S23, it is determined whether the high pressure steering start condition is met. If the result of the determination is "yes", the process proceeds to step S24. Otherwise, the process proceeds to step S25.

[0059] In step S24 , if the start condition of the high-pressure steering is met, the steering oil pump high-pressure controller 112 is controlled to be connected to the steering motor high-pressure winding 113 to switch to the high-pressure steering working mode.

[0060] In step S25, if the activation condition of the high-pressure steering is not met at this time, both the high-pressure steering and the emergency steering may be controlled to stop working.

[0061] The emergency steering test method of the power steering control system 100 of the present application can utilize the VCU forced low-pressure steering enable switch, and by formulating corresponding control strategies, "forced low-pressure steering enable" can be performed on the power steering control system 100 of the entire vehicle. Therefore, the vehicle can be tested for emergency steering in advance according to actual needs, and there is no need to simulate a high-pressure steering failure to start the emergency steering function. The method is popularizable and easy to operate.

[0062] The emergency steering test method of the power steering control system 100 of the present application can perform emergency steering tests on the vehicle in advance as needed to ensure the effectiveness of the emergency steering function, so that when a high-voltage steering failure occurs during actual use, the emergency steering function can be enabled in time to ensure timely response of the emergency steering and improve the active safety performance of the entire vehicle.

[0063] The present application also provides a vehicle, which includes the power steering control system 100 as described above.

[0064] The emergency steering test method, power steering control system and vehicle provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the emergency steering test method, power steering control system and vehicle in the embodiments of the present application. The description of the above embodiments is only used to help understand the core idea of ​​the present application and is not intended to limit the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the spirit and principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications should also fall within the scope of protection of the claims attached to the present application.

Claims

1. An emergency steering test method for a power steering control system, characterized in that: The power steering control system comprises a steering motor high voltage winding, a steering motor low voltage winding, a steering oil pump high voltage controller for controlling the steering motor high voltage winding, and an emergency steering low voltage controller for controlling the steering motor low voltage winding. The power steering control system has a switchable high voltage steering working mode and an emergency steering working mode. The method comprises: When the vehicle needs to be tested for emergency steering, the VCU is controlled to force the low-voltage steering enable switch to turn on; When a key ON signal is received and the vehicle speed is greater than a predetermined speed threshold, the control cuts off the connection between the steering oil pump high-voltage controller and the steering motor high-voltage winding, and controls the emergency steering low-voltage controller to be connected to the steering motor low-voltage winding, switching to the emergency steering working mode to perform an emergency steering test on the vehicle.

2. The method according to claim 1, characterized in that Also includes: When the shutdown condition of the emergency steering is met, the emergency steering low-voltage controller is controlled to be disconnected from the low-voltage winding of the steering motor to cut off the emergency steering working mode.

3. The method according to claim 2, characterized in that When the emergency steering working mode works for a predetermined time or the vehicle speed is less than or equal to the predetermined vehicle speed threshold, it is determined that the closing condition of the emergency steering is met.

4. The method according to claim 2, characterized in that Also includes: After the emergency steering working mode is cut off, if the start condition of the high-pressure steering is met, the steering oil pump high-pressure controller is controlled to be connected to the high-pressure winding of the steering motor to switch to the high-pressure steering working mode.

5. The method according to claim 1, characterized in that The controlling the VCU to force the low-voltage steering enable switch to turn on includes: The vehicle's rain and snow mode switch is used to trigger the VCU to force the low-pressure steering enable switch to turn on by pressing the rain and snow mode switch a predetermined number of times within a predetermined time.

6. A power steering control system, characterized in that: It includes a vehicle controller, a steering motor high-voltage winding, a steering motor low-voltage winding, a steering oil pump high-voltage controller for controlling the steering motor high-voltage winding, and an emergency steering low-voltage controller for controlling the steering motor low-voltage winding. The power steering control system has a switchable high-voltage steering working mode and an emergency steering working mode. In the high-voltage steering working mode, the steering oil pump high-voltage controller is connected to the high-voltage winding of the steering motor, and the emergency steering low-voltage controller is disconnected from the low-voltage winding of the steering motor; in the emergency steering working mode, the emergency steering low-voltage controller is connected to the low-voltage winding of the steering motor, and the steering oil pump high-voltage controller is disconnected from the high-voltage winding of the steering motor. Among them, the vehicle controller is used to control the connection between the steering oil pump high-voltage controller and the steering motor high-voltage winding to be cut off, and control the emergency steering low-voltage controller to be connected to the steering motor low-voltage winding when the key ON signal is received and the vehicle speed is greater than a predetermined vehicle speed threshold when the VCU forced low-voltage steering enable switch is turned on, and switch to the emergency steering working mode to perform an emergency steering test on the vehicle.

7. The power steering control system according to claim 6, characterized in that: The vehicle controller is also used to control the emergency steering low-voltage controller to disconnect from the steering motor low-voltage winding to cut off the emergency steering working mode when the emergency steering shutdown condition is met.

8. The power steering control system according to claim 7, characterized in that: When the emergency steering working mode is used for a predetermined time or the vehicle speed is less than or equal to the predetermined vehicle speed threshold, the vehicle controller determines that the closing condition of the emergency steering is met.

9. The power steering control system according to claim 7, characterized in that: The vehicle controller is also used to control the steering oil pump high-pressure controller to connect with the steering motor high-pressure winding to switch to the high-pressure steering working mode after the emergency steering working mode is cut off, if the start condition of the high-pressure steering is met.

10. The power steering control system according to claim 6, characterized in that: The vehicle controller is used to receive an on signal of the VCU forced low-voltage steering enable switch which is triggered when the vehicle's rain and snow mode switch is pressed a predetermined number of times within a predetermined time.

11. A vehicle, characterized in that: The invention comprises a power steering control system as claimed in any one of claims 6 to 10.

Images