Liquid Stream in the Rotary Valve of the Hydraulic Power Steering Gear

2007 ◽  
Author(s):  
Ji Xuewu ◽  
Liu Yahui ◽  
Gao Feng
Keyword(s):  
Rotary Valve ◽  
Liquid Stream ◽  
Hydraulic Power ◽  
Power Steering ◽  
Hydraulic Power Steering

Electric Hydraulic Power Steering System Simulation Study

2013 ◽  
Vol 373-375 ◽  
pp. 154-157
Author(s):  
Jun Wang ◽  
Li Chao Xu
Keyword(s):  
Control Strategy ◽  
Steering System ◽  
Vehicle Speed ◽  
Motor Speed ◽  
Rotary Valve ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Steering ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

Properly controlling electro hydraulic power steering system can improve steering performance. The relation of motor speed, vehicle speed and steering speed is gained, according to the influence of motor speed on the steering performance. The force and angle input is set in the driver input model. Rotary valve is simulated by four orifices. The steering resistance between tire and ground is simulated by the coulomb friction on two tips of the rack. The method of double closed-loops PID is used to control the motor. The influence of the control strategy on the steering performance is realized by the simulations of three typical situation, which includes steering portability, road feel, the speed of assist force response and its stability. The results of simulation validate the availability of the control strategy, which is the basic of optimization.

Simulation on Displacement Characteristics of Variable Displacement of Double-Action Vane Pump

2010 ◽  
Vol 152-153 ◽  
pp. 1088-1091
Author(s):  
Lei Chen ◽  
Pan Zhang
Keyword(s):  
Simulation Model ◽  
High Speed ◽  
Steering System ◽  
Vane Pump ◽  
Hydraulic Power ◽  
Power Steering ◽  
Simulink Simulation ◽  
Variable Displacement ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

On of the practical difficulties of high speed automotive hydraulic power steering is that the output exceeds the actual demands of the system, i.e., there is a substantial power loss. This paper discusses the configuration and the action principle of a new variable displacement of double-action vane pump, which consists of floating blocks. The pump belongs to an automotive hydraulic power steering system, and prosperous utilization is expected. In the meantime the mathematical and simulation model for hydraulic power steering of automobile were established and the Matlab Simulink simulation model was presented. Different parameters of pump are selected in simulating programming. The simulating results are analyzed and compared.

Design of Traditional Hydraulic Steering System with Variable Power

2014 ◽  
Vol 644-650 ◽  
pp. 755-758
Author(s):  
Jie Li ◽  
Jian Tong Song ◽  
Li Hong Wang ◽  
Jv Biao Yao
Keyword(s):  
High Speed ◽  
Steering System ◽  
Vehicle Speed ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Characteristics ◽  
Power Steering ◽  
Hydraulic Steering ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

Conventional hydraulic steering system has the problems of "low-speed heavy, high-speed flight" and energy-wasting when steering, the main reason is after the system is designed, the power characteristics are fixed. To solve this problem it is necessary to achieve the power characteristics of changing power steering system according to speed of vehicles, in order to offer the power that matches the speed. Using vehicle speed sensor signal to control pilot solenoid unloading valve to regulate the pressure of hydraulic system, can achieve the regulation of power characteristics, this article is based on such idea to design variable hydraulic power steering system for hydraulic power steering system of light trucks.

Structure Optimization Design of Vane Steering Pump

2014 ◽  
Vol 496-500 ◽  
pp. 904-907
Author(s):  
Lian Fu Yang
Keyword(s):  
Optimization Design ◽  
Structure Optimization ◽  
Low Noise ◽  
Transition Curve ◽  
Hydraulic Power ◽  
Power Steering ◽  
Fitting Method ◽  
Noise Impact ◽  
Curve Fitting Method ◽  
Hydraulic Power Steering

How to reduce or eliminate the noise of the vane steering pump is a key problem to use hydraulic power steering car to solve. After a lot of experiments and demonstration, the methods of adopting correct transition curve, and a large circular arc method, adopting low noise impact curve of eight times optimization design, and the advanced stator curve fitting method, are to be good solutions to the problem of the vane steering pump noise.

Reliability Analysis of the Electric Hydraulic Power Steering Controller Based on Fault Tree Method

2013 ◽  
Vol 427-429 ◽  
pp. 1350-1355 ◽  
Author(s):  
Hao Li Wang ◽  
Guo Biao Shi ◽  
Jin Long Cui
Keyword(s):  
Reliability Analysis ◽  
Fault Tree ◽  
Reliability Prediction ◽  
Relative Importance ◽  
Tree Model ◽  
Hydraulic Power ◽  
Power Steering ◽  
Type Of Failure ◽  
Hydraulic Power Steering ◽  
Tree Method

A fault tree model of the electric hydraulic power steering controller has been built and the minimum cut sets leading to the fault of system has been found out. Then, the method of count reliability prediction is used to get the failure rate of each basic event and the type of failure distribution. We use MATLAB to get the top event probability and the possibility importance and relative importance of each basic event. Lastly, MATLAB, based on Monte Carlo simulation, is used to make the simulation of fault tree model accurate and to calculate reliability index. The accuracy of this method is verified perfectly by calculating. Especially for complex system, this method of reliability analysis is of great significance.

Discussion Structure of Variable Displacement of Double Action Vane Pump

2011 ◽  
Vol 80-81 ◽  
pp. 616-620
Author(s):  
Lei Chen ◽  
Pan Zhang ◽  
Hai Yan Wang ◽  
Ji An
Keyword(s):  
Flow Model ◽  
Steering System ◽  
Vane Pump ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Steering ◽  
Variable Displacement ◽  
Flow Changes ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

This paper discusses the configuration and the action principle of a new variable displacement of double-action vane pump, which consists of floating blocks. The floating blocks that may move up and down in accordance with the rotational speed of the pump. The pump belongs to an automotive hydraulic power steering system, and prosperous utilization is expected. The theoretical flow model of the new pump was established and the pump flow changes under different speed were compared.

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