SA E TECHNICAL PAPER SERIES Intricacies of SAE #2 Computerized Clutch Friction Durability Testing Steve Marty and Bill Carpenter Southwest Research Institute /d 7 F--53 The Engineering Society Fuels and Lubricants *A =For Advancing Mobility and Sea Air and Space, Meeting and Exposition INTERNATIONAL Philadelphia, Pennsylvania October 18-21,1993 400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (41 2)776-4841 Fax:(412)776-5760 Downloaded from SAE International by University of Edinburgh, Sunday, August 26, 2018The appearance 01 the ISSN code al Ihe bottom 01 lhis page indkales SAE's consenl lhal copies 01 Ihe paper may be made for personal or inlernal use 01 specillc clienls. Thisconsent is gbenon ihe condilion, however, lhal Ihe copier pay aS5.00per arlicle copy fee lhrough the Copyrlghl Clearance ~enler, Inc. Operalions Cenler, 27 Congress St., Salem, MA 01970 lor copying beyond lhal permilled by Seclions 107 or 108 of the U.S. Copyrighl Law. Thls consenl does no1 exlend lo olher kinds 01 copying such as copying lor general dlslribulion, lor adverlising or promotional purposes, lor creating new collective works, or lor resale. SAE roulinely slocke prlnled papers lor a period 01 lhree years following dale ol publicallon. Direct your orders lo SAE Cuslomer Sales and Salislacllon Deparl- menl. Quanlily reprlnl rales can be oblained from Ihe Cuslomer Sales and Salisfaclion Deparlmenl. To request permisslon lo reprint a lechnlcal paper or permission lo use copyrighled SAE publications In olher works, contact the SAE Publicalions Group. All SAE pepers, elan&&, end releded books are abstracted ad indexed h Ihe SAE Globel MoMllly Detahse. No part of this pubticalion may by reproduced In any lorm, In an electronic relrieval wtem or olhemlee, wlt~wt the prior wrinen pennlsslon ol lhe publisher. ISSN 0148-7191 Copyright le(M Society of Automotive Engineers, Inc. Podllons and opinions advanced in lhls paper are Ulose d the aulhor(s) and no1 necessarily lhose of SAE. The aulhor is solely responsible lor lhe contenl of Ihe paper. A process le available by which discusdone will be prhled with the paper if I1 is published In SAE Iransaclions. For pennlsdon to publish lhls paper In lul or in part, mlacl the SAE Publications Group. Persons wishing lo submil papers lo be considered lor presenlalion or puMicaUon Ihrough SAE ~hould send lhe manuscript or a 300 word abstracl of a proposed manuscript lo: Secrelary, Engineering Aclivily Board, SAE. Printed in USA -1~0581~0 Downloaded from SAE International by University of Edinburgh, Sunday, August 26, 2018Intricacies of SAE #2 Computerized Clutch Friction Durability Testing Steve Marty and Bill Carpenter Southwest Research Institute ABSTRACT clutch packs and band-drum assemblies. These types of clutches are shown in Figure 1. This paper discusses the implications of com- ~uterizina the SAE #2 clutch friction durability tests ihat ~eniral Motors Corporation and Ford-~otor Company require for automatic transmission fluid certification. There are three reasons for this pa- per. 1) Friction durability testing is a significant part of a much larger battery of tests needed to qualify a fluid. 2)There have been recent modifications concerning computerization of both the Ford and GM tests. 3) Because there are only two OEM qualified testing facilities, the details of certain test- ing intricacies in the areas of data acquisition, re- duction and reporting may not be as understood as well as in other areas of automotive-based standardized testing. Formulators of automatic transmission fluid need to be aware of all details surrounding the collection and evaluation of the data that will result in the final test report. This paper focuses on the algorithms and nuances of data acquisition, data reduction, and report generation as based on the issued test specifications by Ford and GM. The intention of this paper is to give i