400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-0790 Web: www.sae.org SAE TECHNICAL PAPER SERIES 2007-01-0964 Development of an Engine Torquemeter for In-Vehicle Application and Parametric Study on Fuel Consumption Contribution Kyoung-Pyo Ha, Jin Kook Kong and Woo Tae Kim Hyundai Motor Company Reprinted From: Testin g & Instrumentation, 2007 (SP-2131) 2007 World Congress Detroit, Michigan April 16-19, 2007 Downloaded from SAE International by North Carolina State Univ, Monday, September 17, 2018By mandate of the Engin eering Meetings Board, th is paper has been approved for SAE publication upon completion of a peer review process by a minimum of three (3) industry experts under the supervision of the session organizer. 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]: 724-776-3036Tel: 724-772-4028 For multiple print copies contact: SAE Customer ServiceTel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-776-0790Email: Customer [email protected] ISSN 0148-7191Copyright © 2007 SAE InternationalPositions 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 North Carolina State Univ, Monday, September 17, 20182007-01-0964 Development of an Engine Torquemeter for In-vehicle Application and Parametric Study on Fuel Consumption Contribution Kyoung-Pyo Ha, Jin Kook Kong and Woo Tae Kim Hyundai Motor Company Copyright © 2007 SAE International ABSTRACT The mechanical energy of an engine is lost by engine friction and in driving the engine’s auxiliary components, which is then transferred to transmission. Thus, it is very important to know the exact value of engine friction and the driving torque of engine’s auxiliary components in order to reduce fuel consumption of an engine by reducing these losses. And, it is also helpful to know the braking torque of an engine in actual vehicle so as to improve vehicle’s driving performance. For these reasons, present study developed an engine torquemeter for in-vehicle application, and measured braking torque of an engine in vehicle and analyzed fuel consumption contributi ons of engine’s auxiliary components. INTRODUCTION Higher engine torque and lower fuel consumption rate is one of the most important characteristics in modern vehicles. In order to develop a vehicle having higher performances in view of torque and fuel consumption, it is necessary to know exac tly the influence of various design parameters on these performances. Measuring torque from an engine and engine’s auxiliary components in vehicle gives ve ry useful information to investigate not only vehicle dynamics but also vehicle’s fuel economy. Figure 1 shows a simple energy diagram of an engine both inside and outside. It is necessary to know engine’s final output torque to investigate vehicle dynamics, however it is also very helpful to know the torque transferred at several points of an engine and engine’s auxiliary components in order to study vehicle’s fuel economy more precisely. For instance, an auxiliary component of an engine is known to consume 10% of fuel supplied to the engine, that is, contribution t