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�������պ����ѧѧ�� 2007, Vol. 33 Issue (05) :605-607    DOI:
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1. �������պ����ѧ ��������ϵ, ���� 100083;
2. �廪��ѧ ��������ϵ,���� 100084
Primary calculation of electronically controlled hydraulic power steering
Gao Feng1, Liu Yahui1, Ji Xuewu2, Guo Xiaolin2*
1. Dept. of Automobile Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Dept. of Automobile Engineering, Tsinghua University, Beijing 100084, China

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Abstract�� Electronically controlled hydraulic power steering (ECHPS) improves driver-s ‘road feel’ because it has alterable assistance character. Steering gear model and bypass ECHPS model were built based on the hydraulic principle of the control valve and ECHPS. A simple formula suited the two models was used to analyze the assistance character of steering gear and ECHPS. The bypass ECHPS parameters- affections were analyzed by changing basic gap- width or slot-s radius of the control valve, or torsion bar-s stiffness of steering gear or both of basic gap- width and slot-s radius. The electromagnetic valve- affection was also analyzed by changing the orifice-s figure of the spool. The results show that the assistance character of the bypass ECHPS is determined mostly by the control valve of the steering gear, it has relations with the electromagnetic valve else.
Keywords�� electric control   hydraulic   steering   valve   character     
Received 2006-06-29;
Fund:

�й���ʿ���ѧ����������Ŀ(20060390457)

About author: �� ��(1955-),��,����������,����,gaof@buaa.edn.cn.
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�߷�, ���ǻ�, ��ѧ��, ������.���Һѹ����ת��ϵͳ�ij���ƥ�����[J]  �������պ����ѧѧ��, 2007,V33(05): 605-607
Gao Feng, Liu Yahui, Ji Xuewu, Guo Xiaolin.Primary calculation of electronically controlled hydraulic power steering[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(05): 605-607
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