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 2006-01-1503 Development of Hybrid System for 2006 Compact Sedan Takaaki Iijima Honda R&D 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 University of British Columbia, Monday, July 30, 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 University of British Columbia, Monday, July 30, 2018ABSTRACT An Integrated Motor Assist (IMA) system for the 2006 Civic Hybrid has been developed, with the goal of having class leading fuel economy among compact vehicles and enhanced driving performance. The IMA system has been enhanced for greater power and efficiency. Combining the 3-stage i-VTEC engine with a higher power, higher efficiency electric motor assist mechanism enables an increase in deceleration regeneration energy and a drive mode powered by the electric motor alone. The engine is a newly developed 3-stage i-VTEC, based on the 1.3L SOHC i-DSI engine. The new 3-stage i- VTEC engine incorporates both a VTEC mechanism that switches cam profiles in low and high engine speed ranges, and a cylinder de activation mechanism. The CVT has both an expanded ratio range and a higher final gear ratio. Through these technological enhancements, we have achieved the highest levels of fuel economy in the compact class and enhanced acceleration performance. INTRODUCTION Automotive consumer demand for better fuel economy and improved power continues to rise year after year. This consumer demand for improved fuel economy and power, has made it necessary to develop hybrid systems to achieve these aims concurrently. In response, Honda introduced the Insight in 1999, the Civic Hybrid in 2002 [1], and the Accord Hybrid in 2004, further advancing fuel economy and driving performance by means of the hybrid system [2]. This paper explains the newly developed IMA system for the 2006 Civic Hybrid. It is based on the IMA used in the 2003 Civic Hybrid (referred to hereafter as the previous system). AIM OF DEVELOPMENT The aim is to achieve 50 mpg for both city and highway fuel economy and 0-60 mph acceleration in 11.5 seconds. OVERALL SYSTEM CONFIGURATION Fig. 1 shows the in vehicle IMA system configuration, and Fig. 2 shows the IMA power train. The basic structure is the same as that of the conventional IMA system. The power train, with the electric motor between the engine and the CVT, is in the