Drive-by-wire independent steering system and method thereof

An independent steering, wire-controlled technology, applied to the fluid steering mechanism and other directions, can solve the problems of complex structure and control, affect normal steering, and high complexity, and achieve the effect of increasing steering stability, ensuring safe steering, and simple device structure.

Active Publication Date: 2019-06-07
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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  • Drive-by-wire independent steering system and method thereof
  • Drive-by-wire independent steering system and method thereof
  • Drive-by-wire 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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PUM

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Abstract

The invention provides a drive-by-wire independent steering system and a method thereof. The drive-by-wire independent steering system comprises a detecting mechanism, an execution mechanism and a control unit; the execution mechanism comprises steering motors, a vehicle wheel steering mechanism, an oil supplying system and hydraulic cylinders; under the condition that a vehicle runs normal, the left steering motor and the right steering motor are used for driving a left rack and a right rack correspondingly to perform independent steering coordination control; and when a fault occurs to one of the left steering motor and the right steering motor, the left rack and the right rack are combined into one through closing of magnetic valves, the other one motor is used for driving gears and theracks to ensure normal steering of the vehicle, and when the vehicle approaches steering ending, a redundant backup hydraulic system is used for performing micro-adjustment of fault steering vehiclewheels to ensure normal linear running and steering running of the vehicle. According to the drive-by-wire independent steering system and the method thereof, flexible coordination control over independent steering of a left vehicle wheel and a right vehicle wheel during normal drive-by-wire steering can be realized to improve the operation and control stability of the vehicle, and the condition that the vehicle can perform normal linear running and steering running when the fault occurs to the steering system can be ensured as well.

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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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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