SAE TECHNICAL PAPER SERIES Aisin AW New Four-Speed Automatic Transmission for FWD Vehicles Kazuhisa Ozaki and Fumitomo Yokoyama Aisin AW Co., Ltd. Yoshinari Kuwayama AW Europe S. A. Masaaki Nishida, Tatsuya Iwatsuki, and Mitsuhiko Ando Aisin AW Co., Ltd. Reprinted from: New Developments in Transmission and Driveline Design (SP-1087) The Engineering Society * AEFor Advancing Mobility so and Sea Alr and Soace- International Congress and Exposition Detroit, Michigan February 27 - March 2,1995 400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (41 2)776-4841 Fax:(412)776-5760 Downloaded from SAE International by University of Leeds, Monday, September 24, 2018The appearance of the 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 isgiven on the condition, however, that the copier pay a $5.00 per article copy fee through the Copyright Clearance Center, Inc. Operations Center, 222 Rosewood Drive, Danvers, MA 01 923 for copying beyond that permitted by Sections 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, lor 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 t'o use copyrighted SAE publications in other works, contact the SAE Publications Group. All SAE papers, standards, and selected books are abstracted and indexed in the Global Mobility Database. No part of this publication may by reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. lSSN 01 48-71 91 Copyright 1995 Society of Automotlve 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 tho content of the paper. A process is available by which discussions will be printed with the paper if it is published 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 300 word abstract of a proposed manuscript to: Secretary, Engineering Activity Board, SAE. Printed in USA 90-1 ~O~DIPG Downloaded from SAE International by University of Leeds, Monday, September 24, 2018Aisin ABSTRACT AW New Four-Speed Automatic Transmission for FWD Vehicles Kazuhisa Ozaki and Fumitomo Yokoyama Aisin AW Co., Ltd. Yoshinari Kuwayama AW Europe S. A. Masaaki Nishida, Tatsuya Iwatsuki, and Mitsuhiko Ando Aisin AW Co., Ltd. summarized. Aisin AW has developed a new lightweight, compact automatic transmission: the 60-50LE. The 60-40LE is designed for small cars of up to 1.6L engine displacement. The transmission is an electronically controlled, +speed, front wheel drive transaxle utilizing a unique, compact planetary gear train. This new planetan gear train, combining a dual planetary gearset, establishes the shortest shaft length of its kind. The electronic control system allowvs far improved shift quality. Application of a linear solenoid allows for optimum control, especially during 2nd to 3rd gear shifting and shifting without the application of a one-way clutch. INTRODUCTION For today's small, front wheel drive automobiles, an increasing number of restrictions are imposed on installation space. In order for the automatic transmission to meet the restrictions, such as a broader cabin space, while also assuring higher body r