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Control method of electro-hydraulic power-assisted steering and system for implementing method

A technology of hydraulic power steering and control method, which is applied in the direction of electric steering mechanism, power steering mechanism, steering mechanism, etc., and can solve the problem of low-temperature start-up with long-term steering without power assistance or small power assistance, so as to overcome the problem of no power steering or small power assistance , enhance adaptability, and prevent safety accidents

Active Publication Date: 2015-09-09
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide an electro-hydraulic power steering control method to solve the problem that the existing steering control method cannot effectively overcome the problem that the vehicle starts at low temperature for a long time without power assistance or with little power assistance. Control Method of Electrohydraulic Power Steering System

Method used

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  • Control method of electro-hydraulic power-assisted steering and system for implementing method
  • Control method of electro-hydraulic power-assisted steering and system for implementing method
  • Control method of electro-hydraulic power-assisted steering and system for implementing method

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Effect test

Embodiment 1

[0033] Such as figure 2 As shown, when the vehicle is started (key ON gear):

[0034]Step 1: the temperature information detected by the temperature sensor 3 is transmitted to the steering controller 5, and corresponding comparison information can be obtained from the temperature information, which is the current value I. Of course, in other embodiments, the comparison information can also be directly is the temperature value, since the comparison information in this embodiment is the current value I, so the steering controller 5 is preset with a set threshold Ia, the set threshold Ia is the temperature sensor 3 when the hydraulic oil temperature T=-10°C The current value corresponding to the sent electrical signal corresponds to the lower limit low temperature value of the hydraulic oil for normal operation. The steering controller 5 compares the actual detected current value with the set threshold Ia: when I≥Ia, that is, when the hydraulic oil temperature T≤-10°C, the stee...

Embodiment 2

[0043] When the vehicle is started (key ON gear):

[0044] Step 1: the temperature information detected by the temperature sensor 3 is transmitted to the steering controller 5, and corresponding comparison information can be obtained from the temperature information, which is the current value I. Of course, in other embodiments, the comparison information can also be directly is the temperature value, since the comparison information in this embodiment is the current value I, so the steering controller 5 is preset with a set threshold Ia, which is set by the temperature sensor when the hydraulic oil temperature T=-10°C The current value corresponding to the electrical signal sent out corresponds to the lower limit low temperature value of the hydraulic oil for normal operation. The steering controller compares the actual detected current value with the set threshold value Ia: when I≥Ia, that is, when the hydraulic oil temperature T≤-10°C, the steering controller sends a high-f...

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Abstract

The invention relates to a control method of electro-hydraulic power-assisted steering and a system for implementing the method. The control method comprises the following steps: detecting the temperature of inputted hydraulic oil of a steering oil pump; then comparing the detected temperature value with a set threshold value, and transmitting a corresponding frequency control signal to a steering motor according to a comparative result, so that the steering motor is controlled to operate at a rotational speed corresponding to a given frequency. The system comprises the steering oil pump, the steering motor and a controller for controlling the motor, wherein the steering oil pump is driven to rotate by the steering motor; the power-assisted steering system further comprises a temperature sensor, the temperature sensor is used for detecting the temperature of the inputted hydraulic oil of the steering oil pump, and the controller is connected with the temperature sensor during sampling. According to the control method and the system, which are disclosed by the invention, not only can the electric energy depletion of the electro-hydraulic power-assisted steering system be effectively reduced and the effective utilization rate of a vehicle-mounted energy resource be increased, but also the problems that assisted power for starting the steering motor does not exist or the assisted power is lower under the low temperature can be effectively solved, so that a response property of the power-assisted steering is improved, and the adaptability of a vehicle in an alpine region is improved.

Description

technical field [0001] The invention relates to an electrohydraulic power steering control method and a system for implementing the method, belonging to the field of vehicle power steering. Background technique [0002] Hydraulic vane pumps are widely used in automotive hydraulic power steering systems and electrohydraulic power steering systems. According to the difference in power consumption between non-steering and steering conditions, two control technologies are mainly used in the prior art to ensure the normal operation and realization of power steering. The purpose of energy saving. [0003] The first is pressure switch technology: [0004] On a car equipped with a low-power fuel (gasoline, natural gas or petroleum gas) engine, the configured hydraulic power steering system generally uses a vane-type steering oil pump with a pressure switch, which is driven by the engine. When the vehicle is idling and turning on the spot, the steering resistance is the largest, an...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D5/06
CPCB62D5/06B62D5/062B62D5/064
Inventor 闫帅林彭能岭李振山陈运来王浩宇
Owner ZHENGZHOU YUTONG BUS CO LTD
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