Electronic variable steering ratio controller, steering system and vehicle

Abstract

The utility model discloses an electronic variable steering ratio controller, a steering system and a vehicle, and belongs to the technical field of automobile steering, the electronic variable steering ratio controller is arranged between a vehicle steering wheel and a steering gear, and a transmission structure is arranged between the vehicle steering wheel and the steering gear; the controller comprises a shell, a motor and a control module, wherein the motor and the control module are arranged in the shell. An output shaft of the motor is connected with the transmission structure; the control module is connected with a vehicle machine of a vehicle and used for receiving the current vehicle speed. The control module is further connected with a motor and used for adjusting the rotating speed of the motor according to the current vehicle speed so as to change the transmission ratio of the transmission structure. The rotating speed of the motor can be adjusted according to the current vehicle speed, so that the transmission ratio is changed, the steering ratio of the steering wheel and the steering gear is matched with the current vehicle speed, the sensitivity of the vehicle during low-speed driving steering and the stability of the vehicle during high-speed driving steering are both considered, the reliability of a steering system is improved, and the vehicle safety is enhanced.

Description

Technical Field

[0001] This application relates to the technical field of automotive steering, and more specifically, to an electronic variable steering ratio controller, a steering system, and a vehicle. Background Art

[0002] In a traditional steering system, there is a direct mechanical connection between the steering wheel and the steering gear, which also means that there is a certain relationship between the steering wheel angle and the locking angle of the steered wheels.

[0003] In the current steering system, the transmission ratio between the steering wheel and the steering gear is fixed, which results in the need to turn the steering wheel too many times when steering at low speeds, with low flexibility and maneuverability. While at high speeds, excessive steering wheel turning will cause the driving angle to deviate, affecting the stability and safety of the vehicle. Utility Model Content

[0004] The purpose of this application is to provide an electronic variable steering ratio controller, a steering system, and a vehicle, aiming to solve the problem that the fixed steering ratio in the prior art affects the maneuverability and stability of the vehicle.

[0005] This application provides an electronic variable steering ratio controller, which is arranged between the vehicle steering wheel and the steering gear, and there is a transmission structure between the vehicle steering wheel and the steering gear; the controller includes a housing, a motor and a control module arranged inside the housing; the output shaft of the motor is connected to the transmission structure; the control module is connected to the vehicle head unit for receiving the current vehicle speed; the control module is also connected to the motor for adjusting the rotation speed of the motor according to the current vehicle speed to change the transmission ratio of the transmission structure.

[0006] Further, the control module includes:

[0007] A receiving sub-module, connected to the vehicle head unit for receiving the current vehicle speed;

[0008] A storage sub-module, which pre-stores a first file and a second file. The first file is used to indicate the correspondence between the vehicle speed and the ideal transmission ratio, and the second file is used to indicate the correspondence between the transmission ratio and the motor rotation speed;

[0009] A processing sub-module, respectively connected to the receiving sub-module and the storage sub-module, for determining the ideal transmission ratio corresponding to the current vehicle speed according to the current vehicle speed and the first file, and determining the target motor rotation speed corresponding to the ideal transmission ratio according to the ideal transmission ratio and the second file;

[0010] A control sub-module, respectively connected to the processing sub-module and the motor, for controlling the motor to rotate at the target motor rotation speed.

[0011] Optionally, the control module further includes a verification sub-module; the verification sub-module is connected to the motor and is used to obtain the current motor speed; the control sub-module is connected to the verification sub-module and is used to adjust the current motor speed according to the target motor speed.

[0012] Optionally, the control module includes a control board and a drive board; the control board is arranged on the top of the motor, and the control board is connected to the wiring terminal of the motor; a first connector is arranged on the control board, and the first connector is connected to the vehicle-mounted computer; the drive board is arranged at the end of the motor, and a second connector is arranged on the drive board, and the second connector is connected to the control board.

[0013] Optionally, the verification sub-module includes a position sensor and an induction magnet; the induction magnet is fixed on the outer circumference of the rotor of the motor; the position sensor is arranged on the drive board and is connected to the control board through the second connector; along the axial direction of the rotor, the position of the position sensor is consistent with the position of the induction magnet; the position sensor is used to obtain the rotation information of the rotor according to the magnetic field change of the induction magnet, and the control board is used to obtain the current motor speed according to the rotation information of the rotor.

[0014] Optionally, the controller further includes a locking structure, and the locking structure is arranged on the motor and is used to limit the rotation of the rotor of the motor when power is off.

[0015] Optionally, the locking structure includes a solenoid valve and a mating part; the mating part is fixed on the outer circumference of the rotor of the motor, and a plurality of card slots are distributed at intervals along the circumferential direction on the mating part; the solenoid valve includes a valve seat and a moving part movably connected to the valve seat, and the size of the moving part is adapted to the card slot; the moving part can move radially relative to the valve seat along the rotor so that the moving part enters or disengages from the card slot.

[0016] Optionally, a heating element is arranged on the control board, the housing includes a metal material, and a boss is arranged at the position corresponding to the heating element on the inner side of the housing, and the boss is in contact with the heating element.

[0017] Beneficial effects:

[0018] The electronic variable steering ratio controller described in this application is arranged between the vehicle steering wheel and the steering gear, and a transmission structure is arranged between the vehicle steering wheel and the steering gear; the controller includes a housing, a motor and a control module arranged inside the housing; the output shaft of the motor is connected to the transmission structure; the control module is connected to the vehicle's on-board computer for receiving the current vehicle speed; the control module is also connected to the motor for adjusting the rotation speed of the motor according to the current vehicle speed so as to change the transmission ratio of the transmission structure. The electronic variable steering ratio controller described in this application can adjust the rotation speed of the motor according to the current driving speed of the vehicle, change the transmission ratio by the high or low rotation speed of the motor, make the steering ratio between the steering wheel and the steering gear adapt to the current vehicle speed, take into account the sensitivity of the vehicle during low-speed driving steering and the stability during high-speed driving steering, improve the reliability of the steering system, and enhance the vehicle safety.

[0019] This application also provides a steering system, including the electronic variable steering ratio controller described above.

[0020] The advantages of the steering system and the above-mentioned electronic variable steering ratio controller over the prior art are the same and will not be elaborated here.

[0021] This application also provides a vehicle, including the electronic variable steering ratio controller or the steering system described above.

[0022] The advantages of the vehicle and the above-mentioned steering system and electronic variable steering ratio controller over the prior art are the same and will not be elaborated here. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required to be used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic structural diagram of an electronic variable steering ratio controller proposed in an embodiment of this application;

[0025] Figure 2 is a schematic structural diagram of the top cover of the housing in the electronic variable steering ratio controller proposed in an embodiment of this application;

[0026] Figure 3 is a schematic structural diagram of the locking structure in the electronic variable steering ratio controller proposed in an embodiment of this application.

[0027] Description of the Reference Numerals:

[0028] 11. Motor; 12. Control module; 13. Winding; 14. Induction magnet; 15. Three-phase terminal; 16. Control board; 17. Drive board; 18. Second connector; 19. Position sensor; 20. Top cover; 21. Boss; 22. Solenoid valve; 23. First connector; 24. Moving part; 25. Fitting part; 26. Card slot. Detailed implementation

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0030] In the related art, in a traditional steering system, there is a direct mechanical connection between the steering wheel and the steering gear, which also means that there is a certain relationship between the steering wheel angle and the locking angle of the steered wheels.

[0031] In the current steering system, the transmission ratio between the steering wheel and the steering gear is fixed, which results in the need to turn the steering wheel too many times when steering at low speeds, with low flexibility and maneuverability. And when driving at high speeds, too large a steering wheel turn will cause the driving angle to deviate, affecting the stability and safety of the vehicle.

[0032] In view of this, an electronic variable steering ratio controller is proposed in the embodiments of the present application.

[0033] See Figure 1 , an electronic variable steering ratio controller is provided between the vehicle steering wheel and the steering gear, and a transmission structure is provided between the vehicle steering wheel and the steering gear; the controller includes a housing, a motor 11 and a control module 12 disposed inside the housing; the output shaft of the motor 11 is connected to the transmission structure; the control module 12 is connected to the vehicle head unit for receiving the current vehicle speed; the control module 12 is also connected to the motor 11 for adjusting the rotation speed of the motor 11 according to the current vehicle speed to change the transmission ratio of the transmission structure.

[0034] Specifically, the vehicle steering wheel is connected to the steering gear through a transmission structure, and the transmission ratio of the transmission structure is the steering ratio between the vehicle steering wheel and the steering gear. The electronic variable steering ratio controller described in the embodiments of the present application is disposed between the steering wheel and the steering gear, and includes a motor 11 and a control module 12. Both the motor 11 and the control module 12 are integrated inside the housing. Among them, the input end of the control module 12 is connected to a power supply and communicates with the vehicle computer through a CAN (Controller Area Network) bus, so that the current driving speed of the vehicle can be received through the vehicle computer. The output end of the motor 11 is connected to the transmission structure, and the transmission ratio of the transmission structure can be changed by adjusting the speed of the motor 11. The control module 12 is connected to the motor 11 and can adjust the speed of the motor 11 according to the current vehicle speed, so as to change the transmission ratio and optimize the steering ratio between the steering wheel and the steering gear according to the current vehicle speed. When driving at a low speed, a smaller transmission ratio is provided, which can reduce the number of turns of the steering wheel and improve flexibility and controllability; when driving at a high speed, a larger transmission ratio is provided to improve the stability and safety of the vehicle.

[0035] Further, the control module 12 includes:

[0036] A receiving sub-module, connected to the vehicle computer, for receiving the current vehicle speed;

[0037] A storage sub-module, pre-storing a first file and a second file. The first file is used to indicate the correspondence between the vehicle speed and the ideal transmission ratio, and the second file is used to indicate the correspondence between the transmission ratio and the speed of the motor 11;

[0038] A processing sub-module, respectively connected to the receiving sub-module and the storage sub-module, for determining the ideal transmission ratio corresponding to the current vehicle speed according to the current vehicle speed and the first file, and determining the target motor speed corresponding to the ideal transmission ratio according to the ideal transmission ratio and the second file;

[0039] A control sub-module, respectively connected to the processing sub-module and the motor 11, for controlling the motor 11 to rotate at the target motor speed.

[0040] Specifically, when the vehicle is turning at a low speed, the steering wheel needs to have a high sensitivity, and the number of turns of the steering wheel should be minimized as much as possible. At this time, the required transmission ratio is small; while when turning at a high speed, the sensitivity of the steering wheel needs to be reduced to prevent the steering angle of the steering gear from being too large and deviating from the original lane. At this time, the required transmission ratio is large. According to the needs of vehicle steering at different speeds, the corresponding relationship between vehicle speed and the ideal transmission ratio can be obtained through simulation experiments. The output shaft of the motor 11 is connected to the transmission structure. The speed of the output rotation of the motor 11 affects the size of the transmission ratio of the transmission structure. The corresponding relationship between the transmission ratio and the speed of the motor 11 can be obtained through simulation experiments. The obtained corresponding relationships between vehicle speed and the ideal transmission ratio, and between the transmission ratio and the speed of the motor 11 are pre-stored in the storage sub-module in the form of a first file and a second file respectively. After the receiving sub-module receives the current vehicle speed and sends the current vehicle speed to the processing sub-module, the processing sub-module can determine the ideal transmission ratio corresponding to the current vehicle speed according to the current vehicle speed and the first file. Then, according to the ideal transmission ratio and the second file, the target motor speed corresponding to the ideal transmission ratio can be determined. Finally, the control sub-module controls the motor 11 to rotate according to the target motor speed. Thus, the control module 12 realizes the function of adjusting the speed of the motor 11 according to the current vehicle speed, thereby changing the transmission ratio, achieving the optimal configuration of the transmission ratio and the vehicle speed, and improving the operability and stability of the vehicle.

[0041] Optionally, the control module 12 further includes a verification sub-module; the verification sub-module is connected to the motor 11 and is used to obtain the current motor speed; the control sub-module is connected to the verification sub-module and is used to adjust the current motor speed according to the target motor speed.

[0042] Specifically, the control module 12 further includes a verification sub-module. The verification sub-module is connected to the motor 11 and can obtain the current motor speed. The control sub-module is connected to the verification sub-module, can receive the current motor speed, and adjusts the current motor speed according to the target motor speed. After the speed adjustment is completed, the verification sub-module continues to obtain the current motor speed. The control sub-module determines whether the difference between the current motor speed and the target motor speed is within a preset error range. If so, no further adjustment is made; if not, the adjustment continues.

[0043] By setting the verification sub-module and cooperating with the control sub-module, the actual speed of the motor 11 can be verified, and the real-time working condition of the motor 11 can be monitored to ensure that the motor 11 works normally according to the control instructions.

[0044] Optionally, the control module 12 includes a control board 16 and a drive board 17; the control board 16 is disposed on the top of the motor 11, and the control board 16 is connected to the terminal of the motor 11; a first connector 23 is disposed on the control board 16, and the first connector 23 is connected to the vehicle head unit; the drive board 17 is disposed at the end of the motor 11, and a second connector 18 is disposed on the drive board 17, and the second connector 18 is connected to the control board 16.

[0045] See Figure 1 , the control module 12 includes a control board 16 and a drive board 17, and the motor 11 includes a winding 13 and a rotor. The control board 16 is arranged on the top of the motor 11, and a first connector 23 is disposed on the control board 16. Through the first connector 23, a power supply, an ignition signal, and a CAN bus can be accessed to realize connection with the vehicle head unit. At the same time, the control board 16 is connected to the three-phase terminals 15 of the winding 13, and can control the motor 11. The drive board 17 is arranged at the end of the motor 11, and a second connector 18 is disposed on the drive board 17. Through the second connector 18, the drive board 17 is connected to the control board 16.

[0046] With the above arrangement, the control board 16 is disposed on the top of the motor 11, and the drive board 17 is disposed at the end of the motor 11, optimizing the electrical layout and structure and improving the space utilization rate.

[0047] Optionally, the check sub-module includes a position sensor 19 and an induction magnet 14; the induction magnet 14 is fixed on the outer periphery of the rotor of the motor 11; the position sensor 19 is disposed on the drive board 17 and is connected to the control board 16 through the second connector 18; along the axial direction of the rotor, the position of the position sensor 19 is consistent with the position of the induction magnet 14; the position sensor 19 is used to obtain the rotation information of the rotor according to the magnetic field change of the induction magnet 14, and the control board 16 is used to obtain the current motor speed according to the rotation information of the rotor.

[0048] Specifically, the check sub-module includes a position sensor 19 and an induction magnet 14, see Figure 1, The induction magnet 14 is fixed on the outer circumference of the rotor of the motor 11. The position sensor 19 is arranged on the drive board 17 and is electrically connected to the control board 16 through the second connector 18. In the axial direction of the rotor, the position of the position sensor 19 is aligned with the position of the induction magnet 14 to ensure the accuracy of signal acquisition. When the motor 11 rotates, the induction magnet 14 rotates synchronously with the rotor and generates a magnetic field change during the rotation. The position sensor 19 can collect the magnetic field change of the induction magnet 14, obtain the rotation information of the rotor based on the magnetic field change, generate a corresponding rotation signal, and send it to the control board 16. After the control board 16 analyzes and processes the rotation signal, the current motor speed can be obtained.

[0049] Optionally, the controller further includes a locking structure arranged on the motor 11 for restricting the rotation of the rotor of the motor 11 when power is off.

[0050] Specifically, when a fault occurs in the motor 11, a power-off measure will be taken. Due to inertia, the rotor of the motor 11 usually cannot stop rotating immediately after power-off. Therefore, in order to prevent the continuous rotation from affecting the transmission ratio, a locking structure is arranged on the motor 11. The locking structure can lock and limit the rotor at the moment of power-off to ensure that the motor 11 stops working immediately. The motor 11 does not work when it is not powered on or fails to power off, and the transmission ratio of the transmission mechanism remains constant. Mechanical transmission can still be carried out between the steering wheel and the steering gear to ensure the steering performance.

[0051] Optionally, the locking structure includes a solenoid valve 22 and a mating part 25; the mating part 25 is fixed on the outer circumference of the rotor of the motor 11, and a plurality of card slots 26 are circumferentially and spacedly distributed on the mating part 25; the solenoid valve 22 includes a valve seat and a moving part 24 movably connected to the valve seat, and the size of the moving part 24 is adapted to the card slot 26; the moving part 24 can move radially relative to the valve seat along the rotor so that the moving part 24 enters or disengages from the card slot 26.

[0052] Specifically, refer to Figure 3, the locking structure includes a solenoid valve 22 and a mating part 25. Among them, the solenoid valve 22 is arranged on the housing outside the motor 11, and the solenoid valve 22 is connected to the second connector 18 through a wire harness to realize connection with the drive board 17; the mating part 25 is fixed on the outer circumference of the rotor of the motor 11, and a plurality of card slots 26 are circumferentially and spacedly distributed on the mating part 25. The solenoid valve 22 includes a valve seat and a moving part 24 movably connected to the valve seat. The size of the moving part 24 is adapted to the size of the card slot 26, and the moving part 24 can move relative to the valve seat along the radial direction of the rotor. Specifically, when the solenoid valve 22 is not powered on, the moving part 24 is located in the card slot 26 of the mating part 25 and is engaged with the card slot 26, and the rotor of the motor 11 cannot rotate; when the solenoid valve 22 is powered on instantaneously, the moving part 24 is affected by electromagnetic force and will move along the radial direction of the rotor away from the mating part 25, so that the moving part 24 disengages from the card slot 26, thereby releasing the locking of the rotor; when the solenoid valve 22 is powered off instantaneously, the electromagnetic force disappears, and the moving part 24 moves along the radial direction of the rotor towards the mating part 25 to reset, so that the moving part 24 enters the card slot 26 and is engaged with it to realize the locking of the rotor.

[0053] Optionally, a heating element is arranged on the control board 16, the housing includes a metal material, and a boss 21 is arranged on the inner side of the housing corresponding to the position of the heating element, and the boss 21 is in contact with the heating element.

[0054] Specifically, in this embodiment, the housing includes a top cover 20, the top cover 20 is located above the control board 16, and working elements are arranged on the control board 16, and some of the working elements are heating elements, which will generate heat during the working process and need to be dissipated. Refer to Figure 2 , a boss 21 is arranged on the inner side of the top cover 20, the position of the boss 21 corresponds to that of the heating element, and the boss 21 protrudes from the inner surface of the top cover 20 towards the heating element, so that the boss 21 can be in direct contact with the heating element. Also, since the housing is made of a metal material, the heat generated by the heating element can be directly and quickly transferred to the boss 21, and then transferred to other parts of the housing through the boss 21, realizing efficient and rapid heat dissipation and ensuring the working performance of the control board 16.

[0055] The electronic variable steering ratio controller described in the embodiment of the present application can adjust the motor speed according to the current driving speed of the vehicle, change the transmission ratio by the high or low motor speed, make the steering ratio of the steering wheel and the steering gear adapt to the current vehicle speed, take into account the sensitivity of the vehicle when steering at low speed and the stability when steering at high speed, improve the reliability of the steering system, and enhance the vehicle safety.

[0056] The embodiment of the present application also provides a steering system, including the electronic variable steering ratio controller as described above.

[0057] The steering system has the same advantages over the prior art as the above-mentioned electronic variable steering ratio controller, which will not be elaborated here.

[0058] An embodiment of the present application further provides a vehicle, including the above-mentioned electronic variable steering ratio controller or steering system.

[0059] The vehicle has the same advantages over the prior art as the above-mentioned steering system and electronic variable steering ratio controller, which will not be elaborated here.

[0060] It should be noted that the embodiments in this specification are all described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0061] It should also be noted that in this text, the orientation or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or terminal device including the element.

[0062] The technical solutions provided by the present application have been introduced in detail above. Specific examples are used in this text to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only for helping to understand the present application. The content of this specification should not be construed as a limitation to the present application. At the same time, for those of ordinary skill in the art, according to the present application, there will be various forms of changes in the specific implementation manners and application scopes. It is not necessary and impossible to list all the implementation manners here, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An electronic variable steering ratio controller, characterized in that, It is arranged between the vehicle steering wheel and the steering gear, and a transmission structure is arranged between the vehicle steering wheel and the steering gear; the controller includes: A housing, a motor and a control module arranged inside the housing; The output shaft of the motor is connected to the transmission structure; The control module is connected to the vehicle head unit and is used to receive the current vehicle speed; the control module is also connected to the motor and is used to adjust the rotation speed of the motor according to the current vehicle speed so as to change the transmission ratio of the transmission structure.

2. The electronic variable steering ratio controller according to claim 1, wherein: The control module includes: A receiving sub-module, connected to the vehicle head unit and used to receive the current vehicle speed; A storage sub-module, pre-storing a first file and a second file, the first file being used to indicate the correspondence between the vehicle speed and the ideal transmission ratio, and the second file being used to indicate the correspondence between the transmission ratio and the motor rotation speed; A processing sub-module, respectively connected to the receiving sub-module and the storage sub-module, and used to determine the ideal transmission ratio corresponding to the current vehicle speed according to the current vehicle speed and the first file, and determine the target motor rotation speed corresponding to the ideal transmission ratio according to the ideal transmission ratio and the second file; A control sub-module, respectively connected to the processing sub-module and the motor, and used to control the motor to rotate at the target motor rotation speed.

3. The electronic variable steering ratio controller according to claim 2, wherein: The control module further includes a verification sub-module; The verification sub-module is connected to the motor and is used to obtain the current motor rotation speed; the control sub-module is connected to the verification sub-module and is used to adjust the current motor rotation speed according to the target motor rotation speed.

4. The electronic variable steering ratio controller according to claim 3, wherein: The control module includes a control board and a drive board; The control board is arranged on the top of the motor, and the control board is connected to the wiring terminal of the motor; a first connector is arranged on the control board, and the first connector is connected to the vehicle head unit; The drive board is arranged at the end of the motor, and a second connector is arranged on the drive board, and the second connector is connected to the control board.

5. The electronic variable steering ratio controller according to claim 4, wherein: The verification sub-module includes a position sensor and an induction magnet; The induction magnet is fixed on the outer circumference of the rotor of the motor; the position sensor is arranged on the drive board and is connected to the control board through the second connector; along the axial direction of the rotor, the position of the position sensor is consistent with the position of the induction magnet; The position sensor is used to obtain the rotation information of the rotor according to the magnetic field change of the induction magnet, and the control board is used to obtain the current motor rotation speed according to the rotation information of the rotor.

6. The electronic variable steering ratio controller according to claim 1, wherein: The controller further includes a locking structure, and the locking structure is arranged on the motor and is used to limit the rotation of the rotor of the motor when power is off.

7. The electronic variable steering ratio controller according to claim 6, characterized in that: The locking structure includes a solenoid valve and a mating member; The mating member is fixed on the outer periphery of the rotor of the motor, and a plurality of card slots are circumferentially and spacedly distributed on the mating member; The solenoid valve includes a valve seat and a moving member movably connected to the valve seat, and the size of the moving member is adapted to the card slot; the moving member can move radially along the rotor relative to the valve seat so that the moving member enters the card slot or disengages from the card slot.

8. The electronic variable steering ratio controller according to claim 4, characterized in that: A heating element is provided on the control board, the housing includes a metal material, and a boss is provided on the inner side of the housing corresponding to the position of the heating element, and the boss is in contact with the heating element.

9. A steering system, characterized in that, Including the electronic variable steering ratio controller according to any one of claims 1-8.

10. A vehicle, characterized in that, Including the electronic variable steering ratio controller according to any one of claims 1-8, or including the steering system according to claim 9.

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