SAE TECHNICAL PA PER SERlES Vibration Analysis of Control Valve for Active Suspension Motohiro Okade, Takahisa Hasebe, and Masahiro Fukuta Aisin Seiki Co., Ltd. Toshio Oonuma and Shuuichi Buma Toyota Motor Corp. Katsuhiko Hattori Toyota Central Res. & Develop. Labs., Inc. Reprinted from: Automotive Suspensions and Steering Systems (SP-917) The Engineering Society 2i//9& International Congress & Exposition *A =For Advancing Mobility and sea ~ir and spacee, Detroit, Michigan INTERNATIONAL February 24-28,1992 400 COMMONWEALTH DRIVE, WARRENDALE, PA 15096-0001 U.S.A. Downloaded from SAE International by Imperial College London, Sunday, September 09, 2018The appearance of the ISSN code at the bottom of this page indicates SAE's consent that copies of the paper may be made for personal or internal use of specific clients. Thisconsent is given on thecondition, however, that the copier paya$5.00 per article copy fee through the Copyright Clearance Center, Inc. Operations Center, 27 Congress St., Salem, MA 01 970 for copying beyond that permitted by Sections 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such as copying for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Service Department. To obtain quantity reprint rates, permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. All SAE papers, standards, and selected books are abstracted and indexed in the SA E Global Mobilrty Database. No part of this publication may by reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. ISSN 0148-7191 Copyright 1992 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the paper if it is published in SAE transactions. For permission to publish this paper in full or in part, contact the SAE Publications Division. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Activity Board, SAE. Printed in USA Downloaded from SAE International by Imperial College London, Sunday, September 09, 2018Vibration Analysis of Control Valve for Active Suspension Motohiro Okade, Takahisa Hasebe, and Masahiro Fukuta Aisin Seiki Co., Ltd. Toshio Oonuma and Shuuichi Buma Toyota Motor Corp. Katsuhiko Hattori Toyota Central Res. & Develop. Labs., Inc. ABSTRACT inexpensive and yet has good response and An active suspension system controls a spring constant and an attenuater in real time using a power supply. Generally, the hydraulic pressures are used for transmitting the power. Therefore, a highly reliable and inexpensive control system has been required for a commercial use. This has been achieved by developing a mechanical fluid servo valve which comprises a simple combination of a solenoid valve and a spool valve. The technical problem of the valve vibrations has been solved through the numerical analyses, the fluid flow visualization tests and the vehicle tests. INTRODUCTION Recently, in accordance with the high performance of automobiles, an active suspension system has been focused on, which has a high degree of ride comfort and stability. The active suspension is a system which controls the spring constant and the attenuater in real time by utilizing the external power supply. In order to transmit the power, most of the systems use hydraulic pre