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Composite steering system and mode switching method thereof

A steering system and steering control technology, applied in the field of steering systems, can solve the problems of energy waste, the electric power steering system is difficult to meet the steering assistance, and achieve the effect of making up for poor reliability.

Pending Publication Date: 2017-07-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large passenger cars, sometimes the electric power steering system is difficult to meet the requirements of steering assistance.
In order for the car to provide corresponding steering assistance under any circumstances, two sets of power steering systems may be required to intervene at the same time, but when two sets of power steering systems work at the same time, a certain amount of energy waste will be generated

Method used

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  • Composite steering system and mode switching method thereof
  • Composite steering system and mode switching method thereof
  • Composite steering system and mode switching method thereof

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Embodiment Construction

[0060] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0061] Such as figure 1 Shown, the present invention has developed a kind of compound steering system, comprises electric power steering system and wire control four-wheel steering system;

[0062] The electric power steering system includes a steering wheel, a steering wheel angle sensor, a steering column, a reduction mechanism, a clutch, a power assist motor, a steering control ECU, a vehicle speed sensor, a lateral acceleration sensor, and a rack and pinion steering gear;

[0063] The four-wheel steering system includes a front axle, a left front wheel hub motor, a right front wheel hub motor, a motor control unit, a left rear wheel hub motor, a right rear wheel hub motor and a rear axle;

[0064] One end of the steering column is fixedly connected with the steering wheel of the automobile, and the other end is connected with the front axle th...

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PUM

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Abstract

The invention discloses a composite steering system and a mode switching method thereof. The composite steering system comprises an electric power-assisted steering system and a drive-by-wire four-wheel steering system, wherein the electric power-assisted steering system comprises a power-assisted motor, and the drive-by-wire four-wheel steering system comprises four hub motors. The current yaw velocity can be calculated according to the steering angle of a steering wheel controlled by a driver and the vehicle speed. The mode switching method of the composite steering system is provided according to the yaw velocity, the lateral acceleration, the vehicle speed and the steering wheel angle, working states of the power-assisted motor and the hub motors can be switched at different vehicle speeds and under different operations by the driver, different power-assisted effects can be provided, and a vehicle can run easily and flexibly when steering at a low speed and can run stably and reliably when steering at a high speed.

Description

technical field [0001] The invention relates to the technical field of steering systems, in particular to a compound steering system and a mode switching method thereof. Background technique [0002] The automobile steering system is the key assembly that determines the active safety of the automobile. The traditional automobile steering system is a mechanical system. The steering movement of the automobile is realized by the driver manipulating the steering wheel and transmitting it to the steering wheels through the steering gear. [0003] The steering-by-wire steering system of automobiles cancels the mechanical connection between the steering wheel and the steering wheel, and the steering is completely realized by electronic control, which gets rid of various restrictions of the traditional steering system. Not only can the force transmission characteristics of the steering wheel be freely designed, but also the steering The angular transfer characteristics of the car br...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D6/00B62D101/00B62D113/00B62D137/00
CPCB62D5/0418B62D5/0463B62D6/00
Inventor 杨遵四赵万忠王春燕张寒高琪王云琦
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS