SAE TECHNICAL PAPER SERIES 932416 Simulating Drive Train Performance of Off-Highway Dump Trucks Lakshmidhara Somayaji Bharat Earth Movers Ltd f The Engineering Society r For Advancing Mobility Land Sea Air and Space@ R N AT I O N A L 1993 International Off-Highway & Powerplant Congress & Exposition Milwaukee, Wisconsin September 13-15,1993 400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (412)776-4841 Fax:(412)776-5760 Downloaded from SAE International by Imperial College London, Sunday, September 09, 2018The appearance of the 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 $5.00 per article copy fee through the Copyright Clearance Center, Inc. Operations Center, 27 Congress St., Salem, MA 01970 for copying beyond that permitted by Sections 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such as copying for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Sales and Satisfaction Depart­ ment. 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. GLOBAL MOBILITY DATABASE All SAE papers, standards, and selected books are abstracted and indexed in the SAE Global Mobility Database. No part of this publication may by reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. ISSN 0148-7191 Copyright 1993 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 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 considered for presentation or publication through SAE should send the manuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Activity Board, SAE. * Printed in USA 90-1203B/PG Downloaded from SAE International by Imperial College London, Sunday, September 09, 2018932416 Simulating Drive Train Performance of Off-Highway Dump Trucks Lakshmidhara Somayaji Bharat Earth Movers Ltd. ABSTRACT Visualising the dump truck performance - be it mechanical or electrical, either while it is being designed or after its launch is an involved task. The complexities in the selection of power train and the conflicting design parameters make the selection procedure complicated and elaborate. The 'Performance Charts' give a simulated travel perfor­ mance of the Off-Highway trucks. The charts are the graphical output of vehicle speed vs. tractive effort vs. gradeability and are hence useful in determining the trucks' ability to negotiate grades at various speeds. The performance charts have been either manual or involved reading two graphs - speed vs. tractive effort and speed vs. gradeability. The article looks at the computerised combined chart. The steps involved in getting the performance charts are listed. Through an example it is shown, how, with the help of CAD, the blank semi-log performance charts can be obtained and using the data base, the curves can be plotted on the perfor­ mance charts. By comparing the performances of the currently used dump trucks with the near-obsolete truck, the design trends and the methodology is analysed.