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Hydraulic steering assist system

A steering assist and hydraulic technology, applied in the direction of steering mechanism, steering rod, fluid steering mechanism, etc., can solve the problems of increasing the driver's feel, affecting the driving feel, and low power assistance, so as to achieve wide application value, low system cost, and improved Effect of Steering Input Force

Active Publication Date: 2018-11-13
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The output of the steering force is determined by the instantaneous flow rate of the steering pump, but at low speeds, the speed is low and the flow rate is small, so the power assist is low and affects the driving feel. feel device

Method used

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  • Hydraulic steering assist system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] like figure 1 As shown, a hydraulic steering assist system includes a steering assist system controller, a vehicle speed sensor, a steering wheel angle sensor, an engine speed sensor and an engine controller, wherein the input end of the steering assist system controller is connected to the vehicle speed sensor, the steering wheel angle sensor and the The engine speed sensor is connected, and the output end of the steering assist system controller is controlled and connected to the engine controller;

[0020] Before using the hydraulic steering assist system, the steering speed value of the engine needs to be set first; the steering speed value of the engine is obtained through experiments, and the steering speed value is in the range of 900-1000rpm. When the engine speed is the steering speed value, the vehicle The flow of the steering pump can reach the maximum value.

[0021] When the vehicle power switch is turned on, the steering assist system controller is woken ...

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Abstract

The invention relates to the field of vehicle steering systems and particularly relates to a hydraulic steering auxiliary system which comprises a steering auxiliary system controller, a vehicle speed sensor, a steering wheel angle sensor, an engine speed sensor and an engine controller; when the steering auxiliary system controller determines that a vehicle is in a low-speed steering state according to signals of the vehicle speed sensor, the steering wheel angle sensor and the engine speed sensor, the steering auxiliary system controller controls the engine to increase the rotation speed to a steering speed value by virtue of the engine controller until the vehicle exits from the low-speed steering state, the steering auxiliary system controller stops controlling the rotation speed of the engine. When the vehicle is in the low-speed steering state, the rotation speed of the engine is controlled, so that the steering input force is improved, and the control stability of the whole vehicle is improved; during normal driving, the auxiliary system is not in charge of control, has no influence on the traffic safety, is low in cost and has extensive popularization and application value.

Description

technical field [0001] The invention relates to the field of vehicle steering systems, in particular to a hydraulic steering assist system. Background technique [0002] At present, the steering assist system is mainly divided into power steering assist system, electronic steering assist system and electronic hydraulic assist system. Due to the large hydraulic assist, simple structure, low manufacturing process and technical level requirements, it is widely used in commercial vehicles and economical It is generally composed of hydraulic steering pump, oil pipe, pressure flow control valve body, transmission belt, liquid storage tank and other components. The output of the steering force is determined by the instantaneous flow rate of the steering pump. However, at low speeds, the rotational speed is low and the flow rate is low, so the power assist is low, which affects the driving feel. Therefore, it is necessary to increase the steering force at low speeds and increase dri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/065B62D6/00B62D101/00B62D113/00B62D127/00
CPCB62D5/063B62D5/065B62D6/001
Inventor 杨斐斐陈庆丰李明祥石永金王祥
Owner SAIC MOTOR
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