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.

Model and Dynamic Characteristics of Electromagnetic Split Clutch for Hydraulic Power Steering Application

2014 ◽  
Vol 644-650 ◽  
pp. 759-762 ◽  
Author(s):  
Bin Tang ◽  
Hao Bin Jiang ◽  
Guo Qing Geng
Keyword(s):  
High Speed ◽  
Mathematic Model ◽  
Steering System ◽  
Hydraulic Power ◽  
Current Output ◽  
Power Steering System ◽  
Power Steering ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering ◽  
Speed Characteristic

In order to improve bus drivers’ high-speed road feel and reduce parasitic loss of hydraulic power steering system (HPS), a novel power steering system is proposed, which is characterized by an electromagnetic slip clutch (ESC) which regulates discharge flow of steering pump to realize variable assist characteristics as well as uniquely transfers on-demand power from ICE to steering pump. The mathematic model of ESC including flux linkage equations, voltage equations, electromagnetic torque equation and kinematic equations under synchronous rotating coordinate system (d-q coordinate) is constructed. Dynamic characteristic, mechanical characteristic, input-output characteristic and excited current-output speed characteristic of ESC are simulated. Finally, the experiment of ESC is implemented. The consistence of simulation results and experiment results indicate correctness and precision of the model.

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.

Energy Analysis for Electric Hydraulic Power Steering System of Electric Bus

2014 ◽  
Vol 610 ◽  
pp. 164-168
Author(s):  
Guo Biao Shi ◽  
Shuai Wang ◽  
Peng Gu ◽  
Huan Xin Xie ◽  
Yi Lin
Keyword(s):  
High Speed ◽  
Characteristic Curve ◽  
Steering System ◽  
Small Displacement ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Steering ◽  
Electric Bus ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

Electric hydraulic power steering system (EHPS) is an on-demand power steering system that uses a small displacement and high speed electric pump. By optimizing the assist characteristic curve, EHPS can save energy more significantly than traditional hydraulic power steering system. After overview of the energy saving principle for EHPS system, the energy consumption of the EHPS system is elaborated, and the energy loss of the mechanical, electrical, hydraulic subsystems is analyzed. Finally, targeted measures are proposed for energy conservation.

Computerized Simulation on Energy Saving Characteristics of Variable Displacement of Double Action Vane Pump

2011 ◽  
Vol 291-294 ◽  
pp. 2709-2712 ◽  
Author(s):  
Lei Chen ◽  
Pan Zhang
Keyword(s):  
Steering System ◽  
Vane Pump ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Characteristics ◽  
Power Steering ◽  
Variable Displacement ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering ◽  
Better Than

Based on the study of a patent, the configuration and action principle of a new variable displacement of double-action vane pump is discussed. The pump is equipped with 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. The mathematical and simulation model for the hydraulic power steering of an automobile was established. Different pump parameters were selected for simulation. The simulation results showed that the pump with the floating block can provide power characteristics are better than a common pump. The utilization of the proposed pump is expected to improve efficiency and decrease exhaust gas and noise.

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.

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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