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Electro-hydraulic redundant all-wheel steering system

A steering system and rear wheel steering technology, applied in steering mechanism, steering rod, fluid steering mechanism, etc., can solve problems such as sealing problems that have a great impact on system efficiency, and achieve the effect of improving reliability

Active Publication Date: 2021-03-09
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The response speed of the rear wheels of the tandem four-wheel steering system is faster, but the sealing problems caused by the hydraulic cylinder and valve body manufacturing process have a great impact on the system efficiency

Method used

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  • Electro-hydraulic redundant all-wheel steering system
  • Electro-hydraulic redundant all-wheel steering system
  • Electro-hydraulic redundant all-wheel steering system

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Embodiment Construction

[0068] The present invention will be described in further detail in conjunction with the following, so that those skilled in the art can implement it with reference to the description.

[0069] Such as figure 1 As shown, an electro-hydraulic redundant all-wheel steering system provided by the present invention includes: a front axle electro-hydraulic steering system, a steering transmission system, and a rear axle electro-hydraulic steering system. For reference, the rear wheel angle is used as feedback, with the help of the speed control of the motor pump in the steering drive system and the displacement control of the two-way variable hydraulic motor, the vehicle can complete all-wheel reverse steering, all-wheel steering in the same direction, rear wheel angle correction and complete vehicle Lateral stability control.

[0070] Among them, such as figure 2 As shown, the front axle electro-hydraulic steering system includes a steering wheel 121, a steering column 122, a fr...

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PUM

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Abstract

The invention discloses an electro-hydraulic redundancy all-wheel steering system which comprises a front axle steering transmission mechanism and a first two-way electromagnetic valve connected withthe front axle steering transmission mechanism; a first emergency closing electromagnetic valve which is connected with the first two-way electromagnetic valve; a second emergency closing electromagnetic valve which is connected with the first two-way electromagnetic valve; a two-way variable hydraulic motor which is connected with the first emergency closing electromagnetic valve and the second emergency closing electromagnetic valve at the same time; a second two-way electromagnetic valve, wherein a port in one side of the second two-way electromagnetic valve is connected with an electric pump, and a port in the other side of the second two-way electromagnetic valve is connected with the two-way variable hydraulic motor; and a rear axle steering transmission mechanism which is connectedwith the two-way variable hydraulic motor and used for driving rear wheels of a vehicle to steer. The invention further discloses a control method of the electro-hydraulic redundancy all-wheel steering system, when the vehicle is in different modes, steering of the vehicle and the specific rear wheel steering angle are controlled according to the state parameters of the vehicle, and the lateral stability of the whole vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle steering systems, and more specifically, the invention relates to an electro-hydraulic redundant all-wheel steering system. Background technique [0002] The existing vehicle all-wheel steering system is divided into mechanical all-wheel steering system, electro-hydraulic all-wheel steering system and electric all-wheel steering system according to the driving mode. The mechanical all-wheel steering system needs to arrange complex mechanical transmission rods. In addition, the fatigue and wear of the mechanical transmission rod will increase the error of the rear wheel angle; the electric all-wheel steering system has high stability, and compared with the electro-hydraulic all-wheel steering system, the size of the motor with the same power is larger than that of the hydraulic actuator, and It is easily affected by external loads and has high cost. Therefore, electro-hydraulic all-wheel steering s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/06B62D5/065B62D6/00B62D113/00B62D119/00
CPCB62D5/062B62D5/064B62D5/065B62D6/00
Inventor 靳立强靳博豪肖峰
Owner JILIN UNIV