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A study on the improvement of the load pressure feedback mechanism of the proportional pressure control valve
Authors:Inho Oh  Jiseong Jang  Illyeong Lee  Daijong Chung  Sunghyun Cho
Affiliation:(1) Korea Maritime University, Pusan, Korea;(2) Graduate School, Tokyo Institute of Technology, Japan;(3) Eukyong National University, Pusan, Korea;(4) R&D Centre, Mando Machinery Co, Ltd., Seoul, Korea
Abstract:The proportional pressure control valve having versatile functions and higher performance is an essential component in the open loop controlled rear wheel steering gear of the four wheel steering system on a passenger car. In this study, the authors suggest a new type of load pressure feedback mechanism which can make it easy to change the control range of load pressure without changing the capacity of solenoid. The concept of the suggested mechanism, composed of the pressure chamber with throttles in series, was described. The mathematical model was derived from the rear wheel steering gear system consisting of a valve and a cylinder for the purpose of analyzing the valve characteristics. And the programme for computing the characteristic of the valve was developed. Experiments were carried out to confirm the performance of the valve and computations were performed to ascertain the usefulness of the developed programme. The results from the computations fairly coincide with those from the experiments. The results from the experiments and computations show that the performance of new valve is as good as that of the already developed one and the new valve has an advantage in the easiness in varying the control range of load pressure.
Keywords:Four Wheel Steering System  Rear Wheel Steering Gear  Proportional Pressure Control Valve  Load Pressure Feedback Mechanism
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