400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 SAE TECHNICAL PAPER SERIES 2002-01-0930 Hybrid Powertrain with an Engine-Discon necting Clutch Michael B. Levin, Shailesh S. Kozarekar and Jeffrey E. Chottiner Ford Motor Co. Edmund Maucher and Aliihsan Karamavruc LuK Inc. Robert Shankland Adapco, Ltd. Reprinted From: Transmission and Driveline Systems Symposium 2002 (SP–1655) SAE 2002 World Congress Detroit, Michigan March 4-7, 2002Downloaded from SAE International by Lulea Technical University, Friday, September 14, 2018The appearance of this 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 is given on the condition,however, that the copier pay a per article copy fee through the Copyright Clearance Center, Inc. OperationsCenter, 222 Rosewood Drive, Danvers, MA 01923 for copying beyond that permitted by Sections 107 or108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such as copying forgeneral distribution, for advertising or promotional purposes, for creating new collective works, or forresale. Quantity reprint rates can be obtained from the Customer Sales and Satisfaction Department.To request permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior wr itten permission of the publisher. ISSN 0148-7191 Copyright © 2002 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the aut hor(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 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 consi dered for presentation or publication through SAE should send the manuscript or a 3 00 word abstract of a proposed manuscript to: Se cretary, Engineering M eetings Board, SAE. Printed in USAAll SAE papers, standards, and selected books are abstracted and indexed in the Global Mobility DatabaseDownloaded from SAE International by Lulea Technical University, Friday, September 14, 20182002-01-0930 Hybrid Powertrain with an Engine-Disconnecting Clutch Michael B. Levin, Shailesh S. Ko zarekar and Jeffrey E. Chottiner Ford Motor Co. Edmund Maucher and Aliihsan Karamavruc LuK Inc. Robert Shankland Adapco, Ltd. ABSTRACT Several types of hybrid-electric vehicles have been developed at Ford Research Laboratory. Among the parallel hybrid systems with a single electric motor, two types were studied. In the first type, the electric motor was attached directly to the crankshaft (mild hybrid) [1], to enable the engine start-stop and regeneration functions. In the second type (full hybrid) the electric motor was connected to the engine through the use of a clutch to allow electric launch of the vehicle and pure electric driving at low speeds. The full hybrid powertrain described in this paper uses a more powerful electric motor for enhanced regenerative braking and engine power assist. An engine-disconnecting clutch saves energy during both the electric propulsion and during vehicle braking. When the clutch is disengaged the engine is shut-off, which eliminates the energy otherwise spent on motoring the engine during electric propulsion. Similarly, during the vehicle braking the energy, that otherwise is wasted on motoring the engine, is collected in the battery. The design analysis includes a dynamic analysis of bearing loads for the cranksha ft, starter-alternator, and transmission input shaft. The rotor radial deflections, amplified by a