400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 SAE TECHNICAL PAPER SERIES 981102 Study on the Dynamic Property of a Paper-Based Wet Clutch Tatsuhito Miura, Noboru Sekine, Toshiaki Azegami and Yasunori Murakami Honda R&D Co., Ltd. Kazuhiro Itonaga and Hiroaki Hasegawa F.C.C. Co., Ltd. Reprinted From: 1998 Transmission and Driveline Systems Symposium: New Developments and Advanced Concepts in Systems and Components (SP-1324) International Congress and Exposition Detroit, Michigan February 23-26, 1998Downloaded from SAE International by Univ of Nottingham - Kings Meadow Campus, Monday, September 10, 2018The appearance of this 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. This consent is given on the condition, however, that the copier pay a $7.00 per article copy fee through the Copyright Clearance Center, Inc. Operations Center, 222 Rosewood Drive, Danvers, MA 01923 for copying beyond that permitted by Sec- tions 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 Sales and Satisfaction Department. Quantity reprint rates can be obtained from the Customer Sales and Satisfaction Department. To request permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior wri tten permission of the publisher. ISSN 0148-7191 Copyright 1998 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 pu blished in SAE Transactions. For permission to publish this paper in full or in part, contact the SAE Publications Group. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 30 0 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USAAll SAE papers, standards, and selected books are abstracted and indexed in the Global Mobility DatabaseDownloaded from SAE International by Univ of Nottingham - Kings Meadow Campus, Monday, September 10, 20181981102 Study on the Dynamic Property of a Paper-Based Wet Clutch Tatsuhito Miura, Noboru Sekine, Toshiaki Azegami and Yasunori Murakami Honda R&D Co., Ltd. Kazuhiro Itonaga and Hiroaki Hasegawa F.C.C. Co., Ltd. Copyright © 1998 Society of Automotive Engineers, Inc. ABSTRACT The effect of the groove configuration of segment bonded type paper-based wet clutches and porosity of friction materials on dynamic friction properties was evaluated in this paper. This evaluation was carried out through visu- alization of the sliding interface of the clutch disk and measurement of the automatic transmission fluid (ATF) velocity into the lining at the surface of friction plate. This evaluation founded that friction plate configurations with large numbers of grooves (small segments) exhibited sta- ble dynamic friction properties with respect to changes in the oil permeation speed at the friction interfaces. INTRODUCTION Dynamic friction properties, one of the important charac- teristics of the paper-based wet clutch, are related to the torque transmission capability of the automatic transmis- sion and significantly affect transmission shift quality, etc. Recently, increasing number of friction disks are being manufactured by t