400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 Web: www.sae.org 2005-01-0274 Development of a Hybrid System for the V6 Midsize Sedan Kohei Hanada, Masaaki Kaizuka, Su sumu Ishikawa, Toshitaka Imai, Hideki Matsuoka and Hiromitsu Adachi Honda R&D Co., Ltd. Reprinted From: Advanced Hybrid Vehicle Powertrains 2005 (SP-1973) 2005 SAE World Congress Detroit, Michigan April 11-14, 2005 SAE TECHNICAL PAPER SERIESDownloaded from SAE International by University of British Columbia, Thursday, August 02, 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 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]: 724-772-4028Fax: 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: Customer [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 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 publication by SAE should send themanuscript or a 300 word abstract to Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by University of British Columbia, Thursday, August 02, 20182005-01-0274 Development of a Hybrid System for the V6 Midsize Sedan Kohei Hanada, Masaaki Kaizuka, Susumu Ishikawa, Toshitaka Imai, Hideki Matsuoka and Hiromitsu Adachi Honda R&D Co., Ltd. Copyright © 2005 SAE International ABSTRACT The Accord Hybrid has been developed to offer the driving performance of a V6 midsize sedan while achieving Civic class fuel economy. The engine is based on a V6 3.0L SOHC VTEC engine, with VCM (variable cylinder management) system. The transmission is a thin 5-speed automatic tr ansmission, modified to integrate with a hybrid system for idle stop, regeneration driving and so on. The IMA (Integrated Motor Assist) system is based on the model employed in the Civic Hybrid. During development the size of the thin DC brushless motor was increased and an IPM (Interior Permanent Magnet) rotor employed, resulting in an improvement of approximately 26% in maximum torque. Controls were developed to effectively utilize the deceleration energy regenerated by the IMA system that assist in providing expansion to the 3-cylinder operation zone, and increase the frequency of the 3-cylinder operation. Establishing these fuel economy-improving technologies has resulted in the vehicle achieving the world’s best fuel economy for a V6 midsize sedan, with a value of 29 mpg in the city and 37mpg on the highway. INTRODUCTION The requirements for better fuel economy and lower exhaust emissions in automobiles are becoming more stringent in the interests of global environmental preservation and resource conservation. A great deal of attention has therefore been focused on better fuel economy vehicles employing hybrid systems. To respond to these requirements, Honda released the ultra-high fuel economy vehicle Insight in 1999 and the compact sedan Civic Hybrid in 2002. (1), (2) For the new 2005 Accord Hybrid, a VCM (Variable Cylinder Management) system has been developed based on the V6 3.0L VT