400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 Web: www.sae.org SAE TECHNICAL PAPER SERIES 2006-01-1339 Development of a New Hybrid Transmission for RWD Car Masatoshi Adachi, Hiroat su Endo, Tsuyoshi Mikami and Katsunori Yagi Toyota Motor Corp. Satoru Wakuta and Tatsuki Uchida AISIN AW CO., LTD. Reprinted From: Advanced Hybrid Vehicle Powertrains 2006 (SP-2008) 2006 SAE World Congress Detroit, Michigan April 3-6, 2006 Downloaded from SAE International by Univ of California Berkeley, Saturday, July 28, 2018The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE's peer review process under th e supervision of the session organi zer. This process requires a minimum 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]: 724-772-4028 Fax: 724-776-3036 For multiple print copies contact: SAE Customer Service Tel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-776-0790Email: [email protected] ISSN 0148-7191 Copyright © 2006 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 th e paper. A process is available by which discussions will be printed with the pap er if it is publishe d in SAE Transactions. Persons wishing to submit papers to be considered for presentation or publicat ion by SAE should send the manuscript or a 300 word abstract to Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by Univ of California Berkeley, Saturday, July 28, 20182006-01-1339 Development of a New Hybrid Transmission for RWD Car Masatoshi Adachi, Hiroatsu Endo, Tsuyoshi Mikami and Katsunori Yagi Toyota Motor Corp. Satoru Wakuta and Tatsuki Uchida AISIN AW CO., LTD. Copyright © 2006 SAE International 1 ABSTRACT The new L110 hybrid transmission was developed for use in front-engine, rear wheel drive (FR) vehicles with 3.5-liter engines. The project goals were to develop a compact, slim structure that could be installed on a platform with an FR layout, and to provide the power performance, high-speed performance, and quietness of a luxury car while maintaining the fuel economy performance of a hybrid. To accomplish this, a new gear train, motor, and other components were developed. The newly developed hybrid transmission also uses coordinated control between the shift mechanism and the motor to achieve acceleration performance without causing the driver to feel any shock from an abrupt change of speed. This paper describes the main structural elements of the transmission and various aspects of its performance. 2 INTRODUCTION Efforts to protect the environment and conserve energy are important for the entire world. For example, in the case of automobiles, such efforts include decreasing the amount of CO 2 emissions and improving fuel consumption efficiency. It is in this context that the hybrid vehicle has achieved both strong acceleration performance and good fuel economy performance. When the original Prius made its debut in 1997, it was seen as a family car with amazingly good fuel economy. In 2003, the New Prius, built on the new concept of Hybrid Synergy Drive, provided even better fuel economy and performance that made it fun to drive. With the RX400h in 2004, the hybrid technology was introduced in a 3-liter class sport utility vehicle, and this year, the hybrid concept was extended to rear wheel drive luxury cars. The new hybrid transmissi