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Control method of electric hydraulic power steering system

A technology of hydraulic power steering and control method, applied in power steering mechanism, steering mechanism, fluid steering mechanism, etc., can solve problems such as reducing vehicle safety and transmission, and achieve the effect of ensuring driving safety.

Inactive Publication Date: 2019-04-05
WUHU DEFU STEERING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the sensor fails, the vehicle speed signal and the steering wheel angular velocity signal cannot be transmitted to the controller, the electro-hydraulic pump will stop working, and the steering wheel will lose power during the driving process, greatly reducing the safety of the vehicle.

Method used

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  • Control method of electric hydraulic power steering system
  • Control method of electric hydraulic power steering system

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Embodiment Construction

[0022] The specific embodiment of the present invention will be described in further detail by describing the embodiments below with reference to the accompanying drawings, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and contribute to its implementation.

[0023] like figure 1 As shown, the present invention provides a control method of an electrohydraulic power steering system, comprising the following steps:

[0024] S1, sensor fault detection;

[0025] S2. After the failure of the sensor is determined, the speed signal of the motor of the electrohydraulic power steering system is collected;

[0026] S3. Control the motor of the electro-hydraulic power steering system to run at a fixed speed, and the motor drives the hydraulic pump to run.

[0027] Specifically, the electrohydraulic power steering system is mainly composed of high-pressure oil ...

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PUM

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Abstract

The invention discloses a control method of an electric hydraulic power steering system. The method includes the steps that S1, a sensor fault is detected; S2, after it is judged that the fault happens to a sensor, a rotation speed signal of a motor of the electric hydraulic power steering system is acquired; and S3, the motor of the electric hydraulic power steering system is controlled to run atthe fixed rotation speed, and the motor drives a hydraulic pump to run. By the adoption of the control method of the electric hydraulic power steering system, the working state of the sensor is detected, so that whether the fault happens to the sensor or not is judged, a vehicle can normally steer after the fault happens to the sensor, and vehicle traveling safety is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of vehicle steering systems, in particular, the invention relates to a control method of an electrohydraulic power steering system. Background technique [0002] Electric hydraulic power steering system (Electric Hydraulic Power Steering System, EHPS) is a steering system that is directly assisted by a booster motor. The controller controls the current of the booster motor according to the vehicle speed and steering wheel angular velocity signals collected by the sensor to achieve The purpose of providing assistance to the steering wheel of the car. Since the vehicle speed and angular velocity signals collected by the sensor are the preconditions for the controller to control the operation of the motor, the sensor plays a huge role in realizing the steering action, and its working status is also monitored by the controller in real time to ensure driving safety. [0003] If the sensor fails, the vehicle spee...

Claims

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Application Information

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IPC IPC(8): B62D5/06B62D5/30
CPCB62D5/064B62D5/30
Inventor 刘培培王静古长风张双杰苏本罡向坤
Owner WUHU DEFU STEERING SYST