400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 Web: www.sae.orgSAE TECHNICAL PAPER SERIES 2004-01-0652 AISIN AW New Six-Speed Automatic Transmission for RWD Vehicles Shingo Uozumi, Takao Taniguchi, Kazumasa Tsukamoto, Masahiro Hayabuchi, Tatsuya Iwatsuki and Satoru Kasuya AISIN AW Co., Ltd. Reprinted From: Transmissi on & Driveline Symposium 2004 (SP-1817) 2004 SAE World Congress Detroit, Michigan March 8-11, 2004Downloaded from SAE International by University of Minnesota, Monday, July 30, 2018All 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: [email protected]: 724-772-4891Tel: 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: 724-776-1615Email: [email protected] ISBN 0-7680-1319-4Copyright © 2004 SAE International 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 discussionswill be printed with the paper if it is published in SAE Transactions. Persons wishing to submit papers to be considered fo r presentation or publication by SAE should send the manuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE.Printed in USADownloaded from SAE International by University of Minnesota, Monday, July 30, 2018 1 2004-01-0652 A I S I N A W N e w S i x - S p e e d A u t o m a t i c Transmission for RWD Vehicles Shingo Uozumi, Takao Taniguchi, Kazumasa Tsukamoto, Masahiro Hayabuchi, Tatsuya Iwatsuki and Satoru Kasuya AISIN AW Co., Ltd. Copyright © 2004 SAE International ABSTRACT AISIN AW has developed a new six-speed automatic transmission TR-60SN for rear wheel drive (RWD) vehicles, for use in sports utility vehicles with high torque engines. This new TR-60SN has been developed based on the concept of improving fuel consumption and drivability while minimizing the number of component parts, and covering engine torque of 10 or 12 cylinders. To achieve this, TR-60SN utilizes component parts including gear train, torque converter, oil pump, and casing that have a completely new design. In addition, a new electric-hydraulic control unit has also been developed that offers both world class shift quality and a sporty shift feeling. INTRODUCTION Recently, five-speed automatic transmissions for RWD vehicles have become standard throughout the world. Further, there has been a rapid increase in market demand for automatic transmissions with more multi speeds for further improved fuel efficiency and better driving performance. To meet these requirements, in 2002, AISIN AW developed a new RWD six-speed automatic transmission TR-60SN which can cover a range of engines, from a 6 cylinder medium class engine to a large 10 or 12 cylinder engine for sports utility vehicles. This is achieved by using different sizes of torque converter, and varying the number of simple planetary pinions and friction discs, so as to cover the wide torque range with one kind of transmission and a hydraulic control unit. Specially, for 6 cylinder engine application, weight reduction by 15 kg was realized as compared to large engine application, by using a small torque converter, a 3 pinion simple planetary gear, fewer friction discs, and so on. Conventional automatic transmissions have been developed by increasing the number of planetary gears and clutches one by one in order to increase from 3 speed to 4 speed or 5 speed. The