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A wire-controlled independent steering system and method thereof

A technology of independent steering and wire control, applied in the direction of fluid steering mechanism, etc., can solve the problems of complex structure and control, affecting normal steering, high complexity, etc., and achieve the effect of increasing steering stability, ensuring safe steering, and simple structure of the device

Active Publication Date: 2021-02-12
湖北凯圣汽车转向系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control complexity of independent front wheel steering by wire control is high, and it is difficult to realize redundant backup, so its development is limited
[0003] Some steering execution systems with fault-tolerant functions in the prior art have complex structures and controls, and it is difficult to achieve precise steering. There are also some steering execution systems that adjust the steering when a fault occurs and affect the normal steering, and the time is long, making it difficult to guarantee the fault. steering safety

Method used

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  • A wire-controlled independent steering system and method thereof
  • A wire-controlled independent steering system and method thereof
  • A wire-controlled independent steering system and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0048] figure 1 Shown is an implementation manner of the independent steering system by wire of the present invention, and the independent steering system by wire includes a detection mechanism, an execution mechanism and a control unit;

[0049] The detection mechanism is used to detect the steering wheel angle signal, the current / torque signal of the steering motor, the vehicle speed signal and the front wheel angle signal;

[0050] The executive mechanism includes a left steering motor 3, a right steering motor 11, a wheel steering mechanism, an oil supply system, a left hydraulic cylinder 5, a right hydraulic cylinder 7, an electromagnetic reversing valve 16 and two-way electromagnetic valves 12, 13, 14, 15, The left steering motor 3 is connected with the left front wheel through the left wheel steering mechanism, the left wheel steering mechanism is connected with the piston rod of the left hydraulic cylinder 5, the right steering motor 11 is connected with the right front ...

Embodiment 2

[0063] A vehicle includes the controlled-by-wire independent steering system described in Embodiment 1, so it has the beneficial effects of Embodiment 1, and will not be repeated here.

Embodiment 3

[0065] A method for controlling the independent steering system by wire according to Embodiment 1, comprising the following steps:

[0066] The detection mechanism detects the steering wheel angle signal, the current / torque signal of the steering motor, the vehicle speed signal and the front wheel angle signal, and transmits them to the control unit;

[0067] Described control unit determines the steering transmission ratio of steering motor 3,11 according to steering wheel angle signal, vehicle speed signal and front wheel angle signal, and control unit controls two-way solenoid valve 12,13,14,15 to be open state, and at this moment, left and right sides The side gear and rack 4, 9 are two independent parts, and the control unit controls the steering motor 3, 11 to drive the wheels to realize independent steering;

[0068] The control unit detects whether the steering motors 3, 11 fail according to the current / torque signal of the steering motors, and when the steering motors...

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Abstract

The invention provides a wire-controlled independent steering system and a method thereof, which include a detection mechanism, an execution mechanism and a control unit. The executive mechanism includes a steering motor, a wheel steering mechanism, an oil supply system and a hydraulic cylinder; when the vehicle is running normally, the left and right steering motors are used to drive the left and right racks respectively to perform independent steering coordination control; When one of the steering motors fails, the left and right racks are combined by closing the solenoid valve, and the other motor is used to drive the rack and pinion to ensure the normal steering of the vehicle. When the vehicle is close to the end of the steering, the redundant backup is used. The hydraulic system of the faulty steering wheel is fine-tuned to ensure the normal straight-line running and steering running of the vehicle; the invention can realize the flexible coordinated control of the left and right wheels turning independently during the normal steering-by-wire steering, increase the steering stability of the car, and It can ensure that when the steering system fails, the vehicle can travel in a straight line and turn normally.

Description

technical field [0001] The invention belongs to the field of vehicle steering systems, and in particular relates to a wire-controlled independent steering system and a method thereof. Background technique [0002] The steering system is an important part of the car chassis, and it is also a window for people to interact with the car. At present, due to the development of smart cars, steer-by-wire technology will be applied to future steering systems. In order to achieve more flexible control of smart cars, independent control of the left and right steering wheels can better meet the needs of future cars. However, the control complexity of independent front wheel steering by wire is relatively high, and it is difficult to realize redundant backup, so its development is limited. [0003] Some steering execution systems with fault-tolerant functions in the prior art have complex structures and controls, and it is difficult to achieve precise steering. There are also some steer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/06B62D5/30
Inventor 徐兴苏鹏威王峰解炬江昕炜江浩斌
Owner 湖北凯圣汽车转向系统有限公司
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