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Steering-mode adjustable electric automobile steering system and control method

A technology for steering systems and electric vehicles, which can be applied to mechanical steering gears, electric steering mechanisms, fluid steering mechanisms, etc., and can solve problems such as lack of

Inactive Publication Date: 2014-04-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In short, there is no electric vehicle steering system and control method with three adjustable steering modes such as mechanical steering, wire-controlled steering, and electric power steering in the prior art

Method used

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  • Steering-mode adjustable electric automobile steering system and control method
  • Steering-mode adjustable electric automobile steering system and control method
  • Steering-mode adjustable electric automobile steering system and control method

Examples

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Embodiment Construction

[0052] combined with Figure 1-8 , to further describe the present invention:

[0053]An electric vehicle steering system with adjustable steering mode, its technical solution is: including EPS, SBW ECU1, fault diagnosis ECU2, power supply module 3, first motor 6, EPS, SBW electromagnetic clutch 7, worm drive reducer 8 , reducer worm 8A, reducer worm gear 8B, universal joint 9, steering pinion 10, steering wheel 11, first steering shaft 12A, second steering shaft 12B, third steering shaft 12C, steering wheel angle torque sensor 13 , worm drive reducer 14, worm 14A, worm gear 14B, second motor 15, electromagnetic clutch 16, electromagnetic clutch 17 for mechanical steering and electric power steering, universal joint 18, steering gear input shaft 19, steering pinion 20, steering Wheel 21, steering rack 22, motor drive circuit 23, motor drive circuit 24, rack displacement sensor 25;

[0054] The steering wheel 11 is connected with the first steering shaft 12A with a fine s...

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Abstract

The invention relates to a steering-mode adjustable electric automobile steering system and a control method. The steering-mode adjustable electric automobile steering system comprises two motors, a mechanical steering module, an electric assisting steering module and a steering-by-wire module, wherein the two motors are arranged on a steering column and a steering pinion respectively, the mechanical steering module, the electric assisting steering module and the steering-by-wire module are formed by three electromagnetic clutches and the like and are used for mechanical steering, electric assisting steering and steering-by-wire. The control method mainly includes the first step of carrying out system initialization, the second step of allowing an ECU to start the corresponding steering mode and carrying out control according to the steering mode selected by a driver, the third step of controlling the steering modes, and the fourth step of carrying out fault diagnosis and fault-tolerant control on the steering system. The steering-mode adjustable electric automobile steering system and the control method have the advantages that the same automobile has high control flexibility on the precondition of being simple in structure, and consequently switching of driving modes can be achieved; when one motor breaks down, an original steering mode can be switched to a steering column assisting type electric assisting steering mode or a pinion assisting type electric assisting steering mode or a mechanical steering mode, and consequently the operation stability, reliability and the fault-tolerance capacity of the automobile are improved.

Description

technical field [0001] The invention relates to a steering system and a control method, in particular to an electric vehicle steering system and a control method with an adjustable steering mode. Background technique [0002] Automobile steering system is closely related to the active safety of automobiles, and is called "the lifeline of high-speed vehicles" and a security component. Automobile steering systems have gone through development stages such as mechanical steering systems, hydraulic power steering systems, electric power steering systems (Electric Power Steering, EPS), and wire steering (Steering-by-Wire, SBW) systems. The mechanical steering system was initially developed, which has the disadvantage of heavy steering for heavy vehicles. The widely used hydraulic power steering system at this stage is easy to steer, but it has the disadvantages of high-speed steering flutter and road feel that cannot be optimally adjusted with the speed of the vehicle. [0003] ...

Claims

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Application Information

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IPC IPC(8): B62D3/04B62D5/04B62D5/06
Inventor 于蕾艳贠平利伊剑波鲍长勇郑亚军李源泉
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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