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 2002-01-1919 Two Motor Electric Axle Codrin-Gruie Cantemir, Giorgio Rizzoni and Ahmed Soliman Center for Automotive Research and Intell igent Transportation, Ohio State University Chris Yakes Oshkosh Truck Corporation (SP-1721) Powertrain & Fluid Systems Conference & Exhibition San Diego, California USA October 21-24, 2002Reprinted From: Advanced Co ncepts and Power SourcesDownloaded from SAE International by University of Liverpool, Monday, September 10, 2018All 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]: 724-772-4028Tel: 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 © 2002 Society of Automotive 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 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 of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by University of Liverpool, Monday, September 10, 2018Copyright © 2002 Society of Automotive Engineers, Inc. ABSTRACT The paper presents a possible concept design for integration of individual wheel AC motors into Oshkosh Truck Corporation’s InDependent Suspension. A new axle concept design (including drive line and CV-joint) is presented with a new AC induction motor concept. Both concepts are able to match 100% the sever-heavy duty requirements in a large area of advanced on and off road traction applications. Concepts are suitable for modularity in a multi-axle (2-6 ) All-Wheel Drive, All Steer configuration vehicle. INTRODUCTION The suggested solution uses a hybrid series configuration and is base designed under independent wheel drive, suspension and steering concept. Thus, there are two electric tracti on motors per axle able to provide truly independent All-W heel Drive, allowing the vehicle, like a tank, to turn around in place by having one or more wheels turning in reverse directions. By going to individually driven wheels ATC and ABS becomes standard and not options and each wheel’s torque could be controlled with 0.1 percent accuracy of the max torque. This control, can be based on a variety of inputs (i.e. load sense, speed, real time dynamics) and providing capabilities just starting to be explored. Individually driven wheels along with the enhanced mobility associated with all wheel steering systems allows for unprecedented control of the vehicle dynamics, thus opening the door for more control in traditionally uncontrollable situations. Further more, the traction system can inst antaneously limit transmission torque. Consequently, the transmission components such as drive shafts, CV-joints, gears and axles can have an enhanced MTBF, and the possibility of an unpredictable failure dramatically reduces. However, the actual “classic” configuration [1] used in severe-heavy duty application is not adequate for the control strategy and/or configuration presented in this paper and a novel approach is needed in this area. In the spirit of this idea, this paper presents a totally new axle concept able to