400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-0790 Web: www.sae.org SAE TECHNICAL PAPER SERIES 2007-01-0463 Computational Analysis of Pressure Control Characteristics in a VFS Solenoid Valve Hyung-Man Kim School of Mechanical and Automotive Engineering, Inje University Il-Hwan Kang, Kap-Seung Choi and Hak-Min Wang Graduate School of Mechanical Engineering, Inje University Hyeok-Jun Tae KyungWon Tech. Inc. Reprinted From: Body Engineerin g and Design, Gl ass Applications, Corrosion Prevention and Design Tools (SP-2069) 2007 World Congress Detroit, Michigan April 16-19, 2007 Downloaded from SAE International by University of Bath , Sunday, September 30, 2018By mandate of the Engin eering Meetings Board, th is paper has been approved for SAE publication upon completion of a peer review process by a minimum of three (3) industry experts under the supervision of the session organizer. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise,without the prior written permission of SAE. For permission and licensing requests contact: SAE Permissions 400 Commonwealth DriveWarrendale, PA 15096-0001-USAEmail: permissions@sae.orgFax: 724-776-3036Tel: 724-772-4028 For multiple print copies contact: SAE Customer ServiceTel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-776-0790Email: Customer Service@sae.org ISSN 0148-7191Copyright © 2007 SAE InternationalPositions 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 pap er if it is publishe d in SAE Transactions. Persons wishing to submit papers to be considered for presentation or publication by SAE should send themanuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by University of Bath , Sunday, September 30, 2018ABSTRACT A solenoid valve is a mechanical part used to generate spatial movement by an electrical signal. A number of solenoid valves have already been used in the electronic control systems of automobile parts. A solenoid valve used in an automobile is divided into the amplitude-modularity solenoid valve and the VFS solenoid valve according to the operational method. A VFS solenoid valve has a short opening delay time and has advantages of a simple structure, compact size, and little fluctuation pressure co mpared with the amplitude- modularity solenoid valves. In the present paper, the pressure control characteristics have been performed numerically in the VFS solenoid valve. Dynamics analyses of the pressure co ntrol characteristics have been evalvated by the Finite Different Method, which show the pressure distribution in the VFS solenoid valve. The results of numerical analyses show the dependence of pressure distribution on the displacement of the spool in the VFS solenoid valve, and then, are compared with the experimental results. INTRODUCTION Electronic control systems ar e an essential part of the automobile and numerous solenoid valves are used in the electronic control of the automobile. The solenoid valves used in the automobile are divided into the amplitude modularity solenoid valve and the VFS solenoid valve, according to the operational method. The solenoid valves which is us ed in most automatic transmissions is the amplitude modularity solenoid valve. The shift shock of the automatic transmission is the quality indicator which is felt not only by the driver but also the passengers and affects the quality of newly developed cars. Therefore, most motor companies have developed an active shift control method using the solenoid valve; this p