400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 Web: www.sae.org 2005-01-1020 AISIN AW New High Torque Capacity Six-Speed Automatic Transmissi on for FWD vehicles Satoru Kasuya, Takao Taniguchi, Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida and Akitomo Suzuki Aisin AW Co., Ltd. Hiroshi Niki AWTC Europe s.a. Reprinted From: Transmissions and Drivelines Symposium–4WD/AWD (SP-1979) 2005 SAE World Congress Detroit, Michigan April 11-14, 2005 SAE TECHNICAL PAPER SERIESDownloaded from SAE International by Stony Brook Univ, Monday, August 13, 2018The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE’s peer review process under the supervision of the session organizer. This process requires aminimum of three (3) reviews by industry experts. 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: [email protected] Tel: 724-772-4028 Fax: 724-772-4891 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] ISSN 0148-7191Copyright © 2005 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 to Secretary, Engineering Meetings Board, SAE.Printed in USADownloaded from SAE International by Stony Brook Univ, Monday, August 13, 20181ABSTRACT AISIN AW has developed a new FWD 6-speed automatic transmission “TF-80SC” for luxury cars with high torque engines. This newly developed automatic transmission (A/T) is based on the concept of the FWD 6-speed A/T “TF-60SN” that we have already introduced to the world market. The basic concept for the 6-speed A/T is to achieve weight saving and comp act as well as better fuel efficiency and driving performance in comparison with conventional 5-speed A/Ts. Of course the shift feel must be the top level in the world, so we increased torque capacity of the TF-80SC to cover luxury cars with high torque engine. One of the outstanding features of the A/T is an advanced band brake that allows simultaneous pursuits of high capacity, weight saving, size reduction and high efficiency as well as hig h-quality shift feeling qualified for luxury cars. This paper describes theadvantages and structure of the new A/T with a focus on our approach to new technology of the band brake system. INTRODUCTION The public sense of urgency over global-scale environmental destruction increases every year. Under these circumstances, the automotive industry plays an especially important role in fighting global warming. In particular, improvement of fuel efficiency is fundamental in order to reduce carbon dioxide emissions. While environmentally friendly compact cars with small engine sizes are getting firmly established in the market, needs for vehicles functionality is growing increasingly diverse and high-performance vehicles with large engine sizes are also desired. Since large engines are installed in luxury cars, they satisfy not only environmental requirements but also high-quality shift feeling. To fulfill the required conditions, a diesel engine, which enables higher torque output and achieves better fuel efficiency compared to gasoline engines, are becoming popular in the ma