Document 2JzVMwBOKkkLexe0LoynrkwkN

Supplement I I Presentation of Dr. James T. Trainor J. ~. ~rainor ~eating Co. LLC BMC/SAB J2430 Dynamometer ~est Program (Standardized Bffectiveness ~est for Aftermarket Brake Priction Products) Presented June 4, 2000, at the PMS I Annual Meeting Key Largo, Plorida FMSI 01226 FMSI 01227 L~- L ~ I) WHY A STANDARDIZED EEEECTIYENES$ .JI;ST FOR AFTERMARKET BRAKE FRICTION PRODUCTS? 1. POTENTIAL FOR GOVERNMENT REGULATION ** 1112 NHTSA RI!PORT & LETTI!R. ** CURRI!NT I!FFORTS BY I!UROPI!AN fRICTION PRODUCERS FOR U.S. ADOPTION OF REG. 10 AFTI!RMARKET STANDARD. ** ACTIVITII!S BY OTHER COUNTRII!S. 2. STRINGI!NT NEW VEHICLE BRAKE RI!QUIREMI!NTS **MAJOR 01! FRICTION MATI!RIAL COMPOSITION CHANGI!S FOR FMVSS 135 AND CUSTOMI!R COMPORT RI!QUIRI!MENTS. ** RI!PLACI!MI!NT FRICTION SHOULD Bl! SUITABLI! FOR THI!SI! VEHICLES. ** INCRI!ASI!D TI!STING TO AVOID UNI!XPI!CTI!D PI!RPORMANCI!. 3. INCREASING CUSTOMI!R INTI!RI!ST IN A STANDARDIZI!D TI!ST PROCI!DURI! FOR RI!LIABLI! & CONSISTI!NT MATI!RIAL COMPARISONS. 4. ITS THE RIGHT THING TO DO: ** LARGI! NUMBI!R OF FRICTION PRODUCI!RS ** Jll1 CHASI! TI!ST IS NOT A RI!LIABLI! BASIS FOR ASSI!SSING ., VI!HICLE BRAKING PERFORMANCI! 3en: ** PUBLIC ASSUMES THERE ARI! STANDARDS TO COVER SAFETY RELATED RI!PLACEMENT PRODUCTS. 0 ~ N N CQ BMC/SAE J2430 DYNAMOMETER TEST PROGRAM REVIEW & UPDATE FOR FMSI JUNE 4, 2000 OCEAN REEF CLUB-KEY LARGO, FL. OUTLINE OF TOPICS I) WHY A STANDARDIZED EFFECTIVENESS TEST FOR AFTERMARKET BRAKE FRICTION PRODUCTS? II) KEY PROJECT OBJECTIVES Ill) BACKGROUND-KEY EVENTS (1987-1991) IV) SAE J2430 RECOMMENDED PRACTICE V) J2430 VALIDATION TESTING VI) J2430 APPLICATION TO AFTERM~RKET PRODUCTS VII) ACCEPTANCE CRITERIA MEANING? WHAT THEY DO NOT MEAN? VIII) CURRENT ACTIVITIES AND DIRECTION IX) SUMMARY J.T.TRAINOR TESTING CO. LLC 8 RIVENDELL DR. SHELTON, CT. 08484 FMSI 01229 ~L L IX) SUMMARY 1. WHY AN AFTERMARKET EFFECTIVENESS STANDARD ** NO U.S. GOVERNMENT STANDARD FOR AFTERMARKET ** GOVERNMENTS MOVING TOWARD REGULATION **FUNDAMENTAL CHANGES IN FRICTION COMPOSITIONS ** CUSTOMERS WANT COMPARABLE PERFORMANCE DATA. ** CONSUMERS ASSUME STANDARDS. ** PREFER VOLUNTARY STANDARD. 2. SAE J2430 RECOMMENDED PRACTICE **SEVERAL TYPES OF USE. ** PARALLELS FMVSS 135 ** RANGE OF DISC & DRUM BRAKE APPLICATIONS **DETAILED FOR REPRODUCIBILITY & VALIDATION. ** NO PASS/FAIL ACCEPTANCE CRITERIA 3. VALIDATION TESTING **MATERIAL DIFFERENTIATION 'TI e:sn:: **TEST/TEST & LAB/LAB ** DYNONEHICLE CORRELATION 0 ~ wN 0 L.~ L 0 IX) SUMMARY-- CONTINUED 4. J2430 APPLICATION TO AFTERMARKET PRODUCTS **FIXED TEST CONDITIONs-EACH APPLICATION **ACCEPTANCE CRITERIA & SUMMARY GRAPHS **EFFECTIVENESS & FADE TEST ONLY 5. WHAT DOES MEETING CRITERIA MEAN/NOT MEAN: ** GUIDELINES FOR QUANTITATIVE & CONSISTENT MATERIAL ASSESSMENT ** CAN'T MAKI! CONCLUSION ON INDIVIDUAL VEHICLE MEETNG FMVSS. ** .12430 INTENDED TO BE PART OF TESTING PROTOCOL. ** BMC/FMC POSITION PAPER 6. CURRENT ACTIVITIES ** EXPAND INDUSTRY UNDERSTANDING & USE. ** MECHANISM TO MAINTAIN ENGINEERING INTEGRITY **ANALYTICAL APPROACHES TO GENERALIZE , e:sn:: THANK YOU 0 ..a. Nw ..a. LL L BMC FRICTION MATERIAL COMMITTEE POSITION PAPER THE BIIC/FIIC POSITION PAPER WILL BE FOUND ON THE BIIC WEB SITE (www.brakecouncil.org). **ENDORSE J2430 ** DESCRIBE ACCEPTANCE CRITERIA & INTERPRETATION. I) "11 3en: 0 ..a. Nw N l._, L ~ VII) CURRENT STATUS & ACTIVITIES 1. COMPANIES RUNNING J2430 TESTS ON AFTERMARKET PRODUCTS. ** ASSESS MATERIALS & CONFIRM LAB/LAB REPRODUCIBILITY 2. COMMUNICATIONS TO BROADEN INDUSTRY UNDERSTANDING & USE. 3. ESTABLISH A MI!CHANISM TO MAINTAIN ENGINEI!RING INTI!GRITY. ** IMPROVI! THE J2430 PROCI!DURE & RI!PORTING FORMAT **INTRODUCE ADDITIONAL VEHICLE APPLICATIONS ., -esn: 0 Nww L l. L VII\ WHAT DOES MEETING ACCEPTANCE CRITERIA MEAN? 1. FIIVSSs ESTABLISH IIINIIIUII VEHICLE BRAKE PI!RFORIIANCE: ** SEVERE DUTY COND.TIONS. **DO NOT ADDRESS DURABILITY, NOISE ~R TYPICAL SE~VICE BRAKING CONDITIONS. 2. MATERIAL EFFECTIVENESS IS A MAJOR, BUT NOT THE ONLY FACTOR DETERMINING VEHICLE BRAKE PERFORMANCE: FRICTION PRODUCER DOES NOT KNOW CONDITIONS OF INDIVIDUAL VEHICLES USING A FRICTION MATERIAL ** CAN-"F RELIABLY PREDICT VEHICLE BRAKING PERFORMANCE OF AN INDIVIDUAL VEHICLE FROM MATERIAL EFFI!CTIVI!NESS ALONE. 3. ACCEPTANCE CRITERIA ARRIVED AT BY DEFINING CERTAIN VEHICLE BRAKI! SYSTEM PARAMETERS. WITH THESE PARAMETERS FIXED, FMVSS STOPPING DISTANCE & BALANCE CAN Bl! EXPRESSED IN TERIIS OF MATERIAL EFFECTIVENESS AND MEASURED FROM .12430 DATA. 5. ACCEPTANCE CRITERIA PROVIDE A QUANTITATIVE ASSESSMENT OF MATERIAL EFFECTIVENESS THAT IS TIED DIRECTLY TO FMVSS REQUIREMENTS. --e~n **INTENT IS THAT ACCEPTANCE CRITERIA SERVE AS USI!FUL & REALISTIC GUIDELINES TO PROVIDE A CONSISTENT, QUANTITATIVE BASIS 0 FOR ASSESSING MATERIAL EFFECTIVENESS. 1\l Co) ~ LL L WHAT DOES MEETING ACCEPTANCE CRITERIA NOT MEAN? 1. SINCE ACCEPTANCE CRITERIA ARE BASED ON FIXED VEHICLE BRAKE SYSTEM PARAMETERS, THAT MAY DIFFER FOR AN INDIVIDUAL VEHICLE, MEETING THESE CRITERIA IS NOT A RELIABLE BASIS FOR CONCLUDING THAT AN INDIVIDUAL VEHICLE WILL OR WILL NOT MEET THE APPLICABLE FMVSS. 2. ACCEPTANCE CRITERIA ARE MINIMUM VALUES & DO NOT DISTINGUISH AMONG MATERIALS THAT MEET THESE LEVELS: ** MEETING THE CRITERIA DOES NOT SPECIFY THE BEST EFFECTIVENESS FOR A GIVEN BRAKE APPLICATION. 3. J2430 IS NOT DESIGNED TO ASSESS OTHER IMPORTANT ASPECTS OF MATERIAL PERFORMANCE SUCH AS, NOISE, DURABILITY, DRUM/ROTOR COMPATIBILITY OR EXTENDED LIGHT DUTY SERVICE. ., DECISION TO COMMERCIALIZE A FRICTION PRODUCT SHOULD BE BASED ON A PROTOCOL OF TEST METHODS 3: ~ J2430 IS INTENDED TO BE PART OF THIS PROTOCOL. 0 ~ Nw U'l '11 --e3n: 0 ewNn "" J2430 DYNO TEST SET'D-P PARAMETERS 1998 FORD EXPLORER 4 DOOR REQUIRED TEST PARAIETER 1. OE BRAKE PART NUMBERS: 1.1 FRONT BRAKE ROTOR 1.2 REAR DISC ROTOR 1.3 REAR DRUM 1.4 OE FRICTION 2. ROLLING RADIUS 3. WHEEL LOAD (CALCULATED FROII SPECIFIED INERTIA) 4. EFFECTIVE BRAKE INERTIA (FROM INERTIA ADJUSTMENT) 5. PRESSURE APLY RATE BEFORE KNEE 8. PROP VALVE ACTIVATION PRESSURE 7. POST KNEE PRESSURE APPLY RATE 8. SUSTAWED TORQUE CORRESPONDING TO: 8.1 0.15g 8.2 0.31g 8.3 0.85g 8.4 0.78g 8.5 O.IOg 8.6 1.00g I. SUSTAWED PRESSURE CORRESPONDING TO: 1.1 75 N PEDAL FORCE 8.2 500 N WITH POWER 8.3 500 N NO POWER 8.4 667 N WITH POWER U 667N NO POWER 8.6116.6 N POWER OTHER DATA FOR EFFECTIVENESS CALCULATIONS: 10. CENTER OF GRAVITY 10.1 OLLW 10.2 fiGVW 11. WHEEL BASE 12. FULLY LOADED STATIC WEIGHTS 12.1 TOTAL VEHICLE 12.2 FRONT AXLE 13. LIGHTLY LOADED STATIC WEIGHTS 13.1 TOTAL VEHICLE 13.2 FRONT AXLE UNITS VEHICLE m Kg KgmA2 kPala kPa kPa/a N.m N.m N.m N.m N.m N.m kPa kPa kPa kPa kPa kPa mm mm mm Kg Kg Kg Kg 0.367 308 714 701 2832 2426 1160 2130 1144 FRONT BRAKE REAR BRAKE F87Z1126BA F57A-20026A ABEX8083EE ABEX8083EE 855 109 8290 363 46 6290 NO PROP. VALVE 449 128 1146 2276 2314 2112 3360 8214 2676 10231 3687 5432 185 383 803 938 188 1236 3295 9387 2605 10389 3738 6414 L ( L~ SUMMARY ANALYSIS-AFTERMARKET FRICTION MATERIAL CHARACTERIZATION SAMPLE BASED ON SAE J2430 l l - - - - - ; 1J=24=3=0A=V::::E:;:::RA:::;:G:;:E::;.OF;::;R;::;:A;;:MP:;:::A:::;P::::PL:::IC;::;:A:;:TIO:;::;N=-S~I-~~ I ICOLD EFFECTIVENESS STOPS u "u Iu -u ~~STMAn l -- -...I AVERAGEOF RAMP APPLICATIONS 01 ~ \ :. I I I I I I ~~:~~~ITS / / ~ L / / Iu .. / u u/ 1 -0.1 ./ . / ~ .. __...,. / ................ --- ----------- ~ ~wII'~Ki~f!~C~-- - - ~ u .k-~~~QUE IIPECFICAT10N 1710 .1- 'i - ACTUAL TORQUE ,_' ~ j MAX. SPECFED PRESSURE ./ I ,.. 1-0 I 11 ACTUALPRESSURElV. -- I h I .II I> 12 II [Ji I I D HOT EFFECTIVENESS STOPS REQUIRED ACTUAL STOPI'I - SUSTAINED PRESSURE (kPa) SUSTAINED TORQUE (N.m) STOPt2 SUSTAINED PRESSURE (kPa) SUSTAINED TORQUE (N.m) ~--POIIn'EsTSTRUCTURAL INTEGRITY -~ I IFADE SNUBS -100 ~SPECFED TORQUE [ ,.... ""': I~!.,.. ! .. HACTUAL TORQUE I IMAX. PRESSURE ....!i-- . . ~ ~ ..A ~ l IACl\JAL PRESSURE 10 I { . .I JIi ..TEST DOCUMENTATION FRICTION MATERIAL: - -FRICTION IIANUFACT""'Uc=-RE:::R:::-:------ 0 I I 7I 10 II 12 I> 0 II , BRAKEAPPLICATION:_ _ _ _ _ _ __ en I~ TEST LABORATORY I COMMENTS - TEST NUMBERIDATE""R""'U~N.,.------..,-- 0 ..a. ......wN J.T.T. 11111110 l. L L IFIGURE 6 ---1 J2430 DYNO/VEHICLE CORRELATION REGRESSED SPECIFIC TORQUE-RAMP APPLICATIONS I0.5 H RA2=0.965 Ir-- COEFF. =1.004 0.4 f- I t- i" 0.3 f- z .::Jc ~ 0.2 - lfexP-R "~ - 0.1 - IHoN~I .,GP-R "-.... ." Ill IHON-FJ- ~- l JcvAN-R 1- 00 0.1 - ,..rCVAN-F_ '-... !...! GP-F IJexP-F I -F250-F~I I: ' 0.2 DYNO. N.mlkPa 0.3 I -0.4 0.5 "'T1 !TOTAL TEST FOR SECTIONS ANALVZED] s:en 0 -cwNo l_ L L VI) J2430 APPLICATION TO AFTERMARKET FRICTION PRODUCTS 1. SPECIAL CONSIDERATIONS I) EXACTLY SAME TEST CON.,ITIONS AT ALL LABS FOR A GIVEN BRAKE. ** BRAKE HARDWARE SPECIFICATIONS **NEW OE ROTOR/DRUM EACH TEST **WHEEL LOAD **BRAKE COOLING CURVES ** DYNAMOMETER SETUP CONTROL SHEET-EACH APPLICATION ** EXCI!L PROGRAM TO VALIDATE I!ACH TEST PROCEDURE **TEST LABS. HAVE HARDWARE & TEST CONDITIONS FOR THE 9 APPLICATIONS RELEASED TO DATI! 2. SPECIFIC ACCEPTANCE CRITERIA-BASED ON FMVSS 135 ** BCMIFMC RECOMMENDS MEET ALL CRITERIA **SUMMARY GRAPHS i) RAMP APPLICATIONS MEET FMVSS/EFFECTIVENESS SPACE ii) COLD EFFECTIVENESS STOPS iii) HOT EFFECTIVENESS STOPS s"'T:1 iv) FADE SNUBS -CJ) 0 v) POST TEST STRUCTURAL INTEGRITY ....a. wN CD l. L L ftGURE4- I CARAVAN REAR DRUM LINING .12430 AVERAGE SPECIFIC TORQUE 0.2 0.175 0.15 . 0.121 -A. ~ z~ 0.1 0.075 O.Oii ,.,. - - 0.02& 0 I'' T TP R R 8 RRE F R8 R EC RR TEST SECTION I I'"11 LN K 98A423-A 0 LNK 98A423-B 3C ~ 0 ..a. N ~ 0 LL L I IFIGURE 5 FORD EXPLORER FRONT BRAKE ..12430 AVERAGE SPECIFIC TORQUE 0.5 ,----------------------------------------------------------------------------. 0.4 t----------------------------------------------------------------------------1 0.3 Cl A. I ~ z 0.2 'I I 0.1 ......- .__A. I0 I II I I I I I I I I I I I I II II II II II II I II I I I II II I I II II II I I I I I I I I I I I I I I I II II II I I I I II I I I I I I I !! I I I I I I I 111 1 1 11 1 1 1 1 111 11 1 1 1 11 1 1 11 1 1 11 1 1 111 1 T TP R R B RRE F RB R EC RR TEST SECTION [~--LNK 98A266-E LNK 88A288-D GTL 110601771 -en"T1 3: LNK AVG. 0.263 GTL0.261 0 ..a. N ~ ..a. LL L IFIGlJRE2 I J1653 COMPARISON OF COMMERCIAL DRUM LININGS 1.2~-------FM-SI-2-42 C-HEV-Y C-APR-ICE -=======~--~ 1 1---------1 o.ar------ ~ID 0.1 r - - - - _ _ j ~ It: 0.4 t - - - - - - - - - 1 ., 3: -tJ) 0 N -l:lo N 0.2 t - - - - - - - - - - 1 0 ....__ _ _ ____. I IMAli. A MATL.B ----. MATL.C D MATL.D MA'R..E MA'R..F MATL.G [REGRESSED SPECIFIC TORQUE) LNK TESTING DATA --- - -- - - - - ----- L [RGUie3l 0.6 \.. GRAND PRIX FRONT BRAKE .12430 AVERAGI! SPECIFIC TORQUE L 0.4 ca 0.3 - -- 'z 0.2 [E.r:: "'-~ oo u 0.1 - ~ II .... . ~,ljli....., 0 ~WP --- --t 0 : ' I ' I I J I I [ j , II I l l I ))II) II , I II I II ', I'' I I I I I ' I l l ) l i l l l [ l i l l i i J I J ,') ' I II I I 1 I II I I I 111111 11111111111 i l l II I l l I I I I I T TP R R B RRE F RB R EC RR TI!ST SECTION Is"1:1: I -.-;T~~.;;;024-08 0 GTL 1108024-07 -CJ) 0 ~ N w.I:Jo, LL L V) J2430 VALIDATION TESTING 1. TOTAL PROGRAM ** OE & AFTERMARKET DISC & DRUM LININGS ** 250+ DYNAMOMETER TESTs-GREENING & LINK TESTING ** 12 INSTRUME,_,TED VEHICLE TEST&-GM & LINK WEST 2. DIFFERENTIATE A.ON' MATERIALS **FIGURES 1 & 2 SUMMARIZE RESULTS FOR SEVERAL COMMERCIAL AFTERMARKET DISC & DRUM LININGS 3. TEST/TEST ** FIGURES 3 & 4 IHOW DETAILS OF DUPLICATE .12430 TESTS ON DISC AND DRUM LININGS. 3. LAB/LAB . ** FIGURE 5 SHO"'S A COMPARISON OF LINK & GREENING RESULTS FOR THE FO"D PPLORER FRONT DISC BRAKE 4.. DYNAMOMETER/VEHICLE ** FIGURE 8 SU M. M ' A RI Z ES DYNAMOMETER/VEHICLE CORRELATION FOR THE BRAKES TESTED. "TT 3: ** 1997 HONDA CIVIC; 1997 CARAVAN; 1997 GRAND PRIX; ~ 1998 EXPLORER; 1998 F250. 0 ~ N t \_ L L [F!GuRe1J SAE J1652 COMPARISON OF COMMERCIAL DISC PRODUCTS 2.------===---------,FIISI D-821 CHI!VY CAPRICE 21--- 1.11------- ! 0.1 1-----------1 0'------- r- IIIIATL A IIIATLB IIIATLC a IIIATLD IIIATLE IIIATLF REGRESSED SPECIFIC TORQUE ., GTL TEST DATA 3: --C/) 0 N ~ C1l t L \.__ IV) SAE J2430 RECOMMENDED PRACTICE 1. J243D UIBfUL FOR: ** QA TilTING ** PQRU~ATION DEVELOPMENT ** BRAKB HARDWARE DESIGN/EVALUATION ** AFTB"'ARKBT MATERIAL CHARACTBRIZATION 2. APPROVED & PUBLISHED BY SAE-AUGUST 1111 3. PARALLBLS PMVSS 135, NOT FMVSS 105 ** FMVSS 135 DYNAMOMBTER SIMULATION TEST. 4. SUITABLE POR A RANGE OF DISC & DRUM BRAKE APPLICATIONS ** OUTLINBS DATA REQUIRED TO RUN A SPBCIPIC APPLICATION. 5. DETAILED SPECIFICATION-REQUIRED FOR REPRODUCIBILITY **ONLY ONE WAY TO RUN EACH APPLICATION, NO OPTlONS. 7. NO PASS/FAIL ACCBPTANCE CRITERIA ** NO MEANING TO SAY A MATERIAL PASSES J243D "T1 I. DESIGNBD FOR EFFECTIVENESS & FADE EVALUATION --3en: **NOT INTENDED TO ASSESS WEAR, NOISB, ROTOR WEAR OR EXTENDED LIGHT DUTY VEHICLE SERVICE. 0 N.p. Q) I -e"sTn::'' .0.... N .~.... (. L L- J2430 PROCEDURE SYNOPSIS I. CHECK BURNISH NUMBER OF SPEED APPLICATIONS iUIJII SUSTAI-D D..I,!.C.z.L 5 SD-3 3 .5 100-3 3 3 SD-3 5 50 RAIIP' 5 100 RAIIP INSTRUMENT CHECK COOLING CURVE zoo 110-3 3 SUSTAINED PRESSURI! kP . . -75N . EFFECTIVENESS FADE 5 50 RAIIP 5 100 IIAIIP 100-3 S.A 15 12o-stl 3 . HOT PI!RFORIIANCI! COOUNG 2 4 10D-3 5D-3 1)8EST COLD EFFI!CT. Z)eSOON. 3 RECOVI!RY RAIIP 2 100 IIAIIP REBURNISH 35 8D-3 3 EFFECTIVENESS 5 50 RAIIP 5 100 RAIIP I 180 RAIIP POST TEST COOLING CURVES - ... INITIAL TEMP. DRUIIIROTOR DEG.C <100 100 100 100 100 100 100 100 55 FIRST SNUB 100 FIRST STOP 100 100 100 I ., sen:: 0 ~ N ~ ()Q lL Ill) KEY EVENTS 1996--1999 1996 ** SAE TAS" FORC:E RLIECTS CONCEPT TO EXTRAPOLATE LINING PERFORMANCE ACROSS PLATFORMS ** BIIC/FMC PUILIIHES OBJECTIVE-RELATES FRICTION MATERIAL PERFORMANCI! TO FMVSS, NOT TO OE MATERIAL **COMPLETE PROCEDURE & TESTING OF DRUM LINING PROCEDURE. -DECISION NOT TO PURSUE SAE STANDARD ** BIIC/FMC SQ.PPOR. T SAE TASK FORCE FOR GENERALIZED PROCEDURE 1997 ** FMVSS/I!FFICTIVI!NESS MODEL ** DRAFT GI!N.....IZI!D DISC & DRUM LINING PROCI!DURE-.12430 ** BMC/FMC FUN,ING FOR .12430 VALIDATION TESTING 1998 ** INSTRUMENTED VEHICLE TESTING-5 VEHICLES ** ESTIMATE B~E INERTIA FROM FRONT/REAR BRAKE TORQUE RATIO 1999 ** SAE PUBLISHED .12430 RECOMMENDED PRACTICE ** COMPANIES RUNNING .12430 TESTS ** PRELIMINARY WORK ON ANALYTICAL APPROACH TO APPLY .12430 TO A BROADIIIl RANGE OF VEHICLE BRAKES ( ( (._ L Ill) KEY EVENTS 1987--1995 1987 ** SAE FORMS PASSENGER CAR BRAKE EFFECTIVENESS TASK FORCE _ 1992 ** NHTSA LETTER TO AFTERMARKET COMPANIES & REPORT ON AFTERMARKET D.SC & DRUM LINING PERFORMANCE. 1993 ** BMC FRICTION COMMITTEE INITIATES SUPPORT FOR SAE TASK FORCE ** THREE PHASE PROGRAM: I) SINGLI! APPLICATION DISC TEST II) SINGLE APPLICATION DRUM LINING TEST Ill) GI!NERALIZED PROCEDURE WITH ACCEPTANCE CRITERIA 1994 ** DYNO & VEHICLE TESTING FOR .11652 1995 ** SAE PUBLISHES .11652-SINGLE APPLICATION DISC BRAKE TEST -"'11 e3n: ** BMC/FIIC FUNDING FOR REAR DRUM BRAKE PROCEDURE 0 ..a. N ~ U) I ., -e-s:n: 0 Nen 0 L. L II) KEY PROJECT OBJECTIVES 1. SINGLI ~ DYNAMOMETER TEST i~":' t' ' 2. PARALLf!J.. fMVSS 135 ** BECO.ING U.S. GOVERNMENT BRAKE PERFORMANCE STAND~--D FOR HYDRAULIC BRAKE VEHICLES. 3. REPRODUCIBILITY ** LAB/~B, AS WELL AS TEST/TEST * * FUN.AJIEf,tTAL CHANGE FROM AlBIC COMPARISON TESTS 4. CAPABILITY TO DIFFERENTIATE AMONG MATERIALS. 5. APPLICABLE TO A RANGE OF VEHICLE BRAKIES. **INITIALLY, VEHICLE SPECIFIC APPLICATIONS ** WANT AN ANALYTICAL BASIS FOR BROADER ASSESSMENT OF MATIRIAL ACCEPTABILITY. 5. ACCEPTANCE CRITERIA * SEPAUTE DOCUMENTS FOR SAl! RECOMMENDED PRACnCE & FOR APPLICATION TO AFTERMARKET PRODUCTS I. PUBLIS"ED AS SAE RECOMMENDED PRACTICE 7. REASONABLE TEST TIME \. I e"sTn:T: 0 ...I. N U'l ...I. l L L BMC OBJECTIVE THE BMC FRICTION MATERIAL COMMITTEE OB.IECTIVE STATES IN PART: THE BMC FRICTION MATERIALS COMMITTEE RESOLVES THAT AFTERMARKET BRAKE FRICTION MATERIALS SHOULD NOT DETERIORATE VEHICLE BRAKE PERFORMANCE BELOW THE APPLICABLE FEDERAL MOTOR VEHICLE SAFETY STANDARD, AND RECOGNIZES THAT ON VEHICLE, DYNAMOMETER, OR OTHER EQUIVALENT TESTING OR ENGINEERING OR COMPUTER ANALYSES MAY BE EMPLOYED BY MANUFACTURERS OF REPLACEMENT FRICTION IN MAKING GOOD FAITH EFFORTS TO DETERMINE FMVSS PERFORMANCE. THE BMC FRICTION MATERIALS COMMITTEE RECOMMENDS: I) AFTERMARKET FRICTION PERFORMANCE SHOULD BE TIED TO THE APPLICABLE FMVSS. II) BRAKE PERFORMANCE OF AN INDIVIDUAL VEHICLE IS INFLUENCED BY FACTORS IN ADDITION TO THI! FRICTION MATERIAL BEING TESTED. FOR THIS REASON, THE FRICTION PRODUCER ~AKES CERTAIN ASSUMPTIONS TO DEFINE VEHICLE SPECIFIC BRAKE PARAMETERS. BASED ON THESE PARAMETERS, FMVSS STOPPING D~STANCE AND BALANCE REQUIREMENTS CAN Bl! EXPRESSED IN TERMS OF MATERIAL EFFECTIVENESS.