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Steering system used for heavy vehicle

A technology for heavy-duty vehicles and steering systems, applied in steering mechanisms, vehicle components, electric steering mechanisms, etc., can solve the problem of difficult to achieve accurate return of the steering system, improve driving comfort, prevent vehicle rollover, and ensure accurate return. positive effect

Active Publication Date: 2019-07-09
SHAANXI HEAVY DUTY AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned patent application only realizes the real-time adjustment of the power assist characteristics.
It is still difficult to achieve accurate return of the steering system at low speeds and good driving comfort when driving on potholes

Method used

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  • Steering system used for heavy vehicle
  • Steering system used for heavy vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1Shown is a schematic structural view of the steering system for heavy vehicles in the present invention. A steering system for heavy vehicles provided by the present invention includes a steering wheel 1, a steering column 3, a hydraulic steering assembly and a steering link 10, the steering column 3 is rotationally connected to the steering wheel 1, and the hydraulic steering assembly Connected to the steering link 10 , the steering system provided in this embodiment also includes a controller 6 , a signal collection system and a booster motor assembly 5 , and the signal collection system and the booster motor assembly 5 are electrically connected to the controller 6 respectively. Preferably, the booster motor assembly 5 is directly connected to the controller 6 , or the booster motor assembly 5 is electrically connected to the controller 6 through a motor driver 8 . When the controller 6 is electrically connected to the booster motor assembly 5 throug...

Embodiment 2

[0057] The difference between this embodiment and embodiment 1 is:

[0058] 1. Working process of low-speed power steering

[0059] When the vehicle speed signal value read by the controller 6 is less than the threshold value Vmin, the controller 6 processes the vehicle speed signal and the torque signal output by the torque angle sensor assembly 2, and the controller 6 calculates the steering assist characteristic according to the processed signal and formula value.

[0060] 2. Low-speed return to normal to assist the work process

[0061] When the vehicle speed signal read by the controller 6 is less than the threshold value Vmin, and the torque angle sensor assembly 2 outputs the rotation angle of the steering wheel 1 and the direction of the rotation speed is opposite, the controller 6 processes the vehicle speed signal and the steering wheel angle signal, and the controller 6 according to the processed Signals and formulas calculate the return to center assist character...

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Abstract

The invention provides a steering system. The steering system comprises a steering wheel, a steering column, a hydraulic steering gear assembly and a steering linkage, wherein the steering column is rotationally connected with the steering wheel, and the hydraulic steering gear assembly is connected with the steering linkage. The steering system further comprises a controller, a signal collectingsystem and a power assisting motor assembly, wherein the signal collecting system and the power assisting motor assembly are electrically connected with the controller, the signal collecting system comprises a vehicle speed sensor and a torque angle sensor assembly, and the torque sensor assembly is arranged on a rotary shaft between the steering column and the steering wheel; the controller is used for analyzing a signal and controlling the power assisting motor assembly. Compared with the prior art, the steering system has the advantages that the system can effectively solve the problems that steering force of a heavy vehicle is heavy at a low speed, the steering wheel is insignificantly straightened, and the driving comfort on a bumpy road is poor; the anti-interference performance of the steering system can be improve when the heavy vehicle runs at high speed, and the emergency steering stability can be improved.

Description

technical field [0001] The invention relates to the technical field of vehicle steering systems, in particular to a dynamic steering system suitable for heavy vehicles. Background technique [0002] With the wide application of hydraulic power steering system on heavy-duty off-road vehicles, the work intensity of the driver when driving the vehicle is greatly reduced. However, the assist characteristics of the traditional hydraulic power steering system are determined by the steering control valve and the oil supply of the hydraulic pump, which cannot achieve the ideal steering assist characteristic curve of the vehicle. Ideally, the power steering system provides greater steering assistance when the vehicle is at low speed, and the power steering system provides less steering assistance when the vehicle is at high speed. Therefore, when the existing hydraulic power steering system is applied to a heavy-duty off-road vehicle with a large axle load on the steering axle, it o...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D5/06
CPCB62D5/0463B62D5/061
Inventor 黄茂虎忠
Owner SHAANXI HEAVY DUTY AUTOMOBILE