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 2004-01-0651 AISIN AW New Six-Speed Automatic Transmission for FWD Vehicles Naoji Katou,Takao Taniguchi, Kazumasa Tsukamoto, Masahiro Hayabuchi and Masaaki Nishida Aisin AW Co., Ltd. Akitoshi Katou AWTC Europe s.a. Reprinted From: Transmission & Driveline Symposium 2004 (SP-1817) 2004 SAE World Congress Detroit, Michigan March 8-11, 2004Downloaded from SAE International by University of British Columbia, Thursday, August 02, 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 Service Tel: 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 for 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 British Columbia, Thursday, August 02, 20182004-01-0651 AISIN AW New Six-Speed Automatic Transmission for FWD Vehicles Naoji Katou, Takao Taniguchi, Kazumasa Tsukamoto, Masahiro Hayabuchi and Masaaki Nishida Aisin AW Co., Ltd. Akitoshi Katou AWTC Europe s.a. Copyright © 2004 SAE International ABSTRACT AISIN AW has developed a six-speed automatic transmission TF-60SN for front wheel drive (FWD) vehicles. This new TF-60SN has been developed based on the concepts of minimizing length and mass increase as compared with current five-speed automatic transmissions, and providing the world’s first transverse FWD six-speed automatic transmission. This has been accomplished using a newly developed planetary gear set, and a new “squeezed” torque converter. In addition, the control system features a unique design that maintains outstanding compactness and achieves a high quality smooth shift feeling. This paper describes the construction, characteristics, and functions of this six-speed automatic transmission. INTRODUCTION Almost 7 years have passed since FWD five-speed automatic transmission became main stream in the world. AISIN AW’s five-speed automatic transmission, 55-50SN, announced in 1998, was an advanced automatic transmission, and still offers advantages in terms of its short length compared with competing models. On the other hand, social demands to protect the global environment are growing stronger, and the automobile industry is now facing the requirements posed by CO2 emission reduction and fuel efficiency improvement. Moreover, demands for better drivability have been rising in the market, and manufactures have to strike a balance between better fuel consumption and better drivability, which are completely opposed demands. AISIN AW has developed an advanced new six-speed automatic transmission TF-60SN for FWD vehicles that is superior in terms of installation, performance, and function, in order to meet these demands. This newly developed TF-60SN is constructed with a reduced number of component parts as compared with our current FWD five-speed automatic transmission, and uses a unique gear train. Six-speeds could be realized b