SAE J 944-1968 STEERING CONTROL SYSTEM - PASSENGER CAR - LABORATORY TEST PROCEDURE.pdf

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1、STEERING CONTROL SYSTEM PASSENGER CAR-LABORATORYTEST PROCEDURE-SAE J944 JUN80- - Reproduced By GLOBAL J.=. ENGINEERING DOCUMENTS.- .i! With The Permission Of SAE? Under Royalty AgreementSAE Recommended PracticeReport of the AUlOmolIV(aiclYCommmee. approved Dembcr 1965. last revised :o“cmber 1968. re

2、affinned wnhout change June 1980.I. SCO/N-This SAE Recommended Practice describes a laboratorv testprocedure for evaluating- the characteristics of steering control systemsndersimulated driver impact conditions. The test procedure emplovs a torso shaped bodv block which is impacted against the steer

3、ing control sYStem.2. Definition-For the purposes of this recommended practice. the steeringcontrol svstem is detined as that portion of the vehicle steering mechanismhat mav affect the occupant impact characteristics.3. Riftnnet-SAE 9i7.4. ltmu to bt Determined4.1 Impact velocity of the body block.

4、4.2 Peak resultant force of the impact.5. Test Equipment and InstrumentDtian5.1 Body Block-The complete body block shall have the followingcharacteristics:BEST COpy AVAILABLE.5.1.1 SPRISG RATE-I07-143kit cm. when the cheslis loaded b a 4in.wide b 15 in. lonlt (10.0 b“ 38.0 ;m I beam. 90 delt to the

5、lonltitudinal a.xis ofthe bod“ block.adparaliel to the backing plate(Fig. II. The center of thebeam is placed 18.0 = 0.25 in. (45. i = 0.63 cm 1 from the top of the head.centered laterally. and preloaded to 5 Ib (2.26 kg) including the weight of thebeam. to establish baseline penetration. Test speed

6、 is 10 = 2 in. minute(25.0 = 5 cmiminute). The load is measured when the beam has moved0.50 in. (12.7 cm) into the body block from the baseline and the spring rate isobtained b“ doubling this load.5.1.2 “EIGHT-The bod block shall weilth i5 + 5 -Olb (33.9i + 2.26-0 kgl. . -5.1.3 BODY BLOCK CE!oolER O

7、F GRAvm-The center of !travitv of the complete bod“ block shall be 21.i = 0.25 in. (55.12 = 0,63c)fr;m the top ofthe head.5.1 A MOMEST OF ISERTIA-The moment of inenia around the lateral axisthrough the center of gravity of the complete body block shall be20 = 2 in.-Ib.sec(23 = 2.3 cm-kltsec).5.1.5 C

8、onfiguration of the bod“block is shown in Figs, 2-4. Information on_ 18.00.2IN.(47.t 0.63 CM),TEST BEAMFIG. I-TEST BEAM LOCATIONdetails and construction of the bod block can be obtained irom S.-E. Ill!iE. Eiltht Mile Road. Detroit. llichiltan 48021.5.2 Instrumentation-Amsstmof instrumentation that w

9、ill pronoedata from which the items inpaagraph4 can be determined and meet Ileperformapce requirements of SAE )97i is acceptable. with the followlIll:exception:5.2.1 The force measurinlt channels shall ha“e a frequenc“ response flat towithin =56., CUT ASREOOIICM)1.614.0 CM)0.2R10CM)0.38 R1096 CM) _I

10、DEI.R13.8CM) 14.701.9 CM).L-I 3.9 !-j (9.9 CM),70 WIDECM),R11.27 CM)t.Ii“,u=“0-SPACES: 0“I-I I 11.77 CM)1-.I_r-6 RIBS: 1.0 WI(2.4CM)1102.9CM), ., , i“,V.-i-u0v;(PR3.-40lIO.16 CM)Oo“l!1.2.I : 1317 CM)L- 12.01130.CM)FIG. 2-MOLD INSERTFIG. !I-BACKBOARD AND BASE34.146-PLANE 0 RIM-BODY BLOCK IN FREE FLIG

11、HTAT AN:! DURING IMPACTCOLUMN ANGLE a-r-:“DETERMINED FROMPACKAGE DRAWINGI,.,/SEATING REFERENCEPOINT OF THEDRIVERBODY BLOCK . - PREFERENCE LINE -l 0.75LINE THROUGH SEATING REFERENCEPOINT OF THE DRIVER. PARALLELTO THE VEHICLE HORIZONTALREFERENCE6.1.2 The bod block at impact is positioned as shown in F

12、i!. 5. The bod“block is centered laterally in relation to the plane of the steerin! wheel rim.The enical dimension. as defined in paralTaph 6.1.1. I the relallonshlpbetween the lower edge of the steering wheel and the reference line on thebod block. .6.2 The steering wheel or steering wheel and colu

13、mn assembl“ to betested is mounted at an angle within =I deg of the design angle in side andplan view.6.3 All pans under test shall be installed using the destgn attachmentpoints and production pans or simulations thereof torqued to the propervalue.6.4 All samples. and the body block. shall be stabi

14、lized at an ambienttemperature ranging between 70-85 F for 4 hr immediate“ prior to teSlln!.-DIRECTION OFIMPACT VELOCITY -.,r-+-iOU“CD“,;1.0 (2.51 CMlLEATHERVESTRUBBER-LIKEMATERIAL TAPEDAND STRAPPEDTO BACKBOARDHOLLOWBODY BLOCKREFERENCE LINE-ALSOMETAL BANDf-A I+-+-iSCOTCH FILAMENT TAPENO B9B I DR I IN WIDE(2.5 OR 10.2 CM)PLYWOOD BACKBOARD2.1, (5,10 CMl-iioo!SECTION A-A(SECTION ROTATED90 DEG5BE!ilCOUNTER-CLOCKWISE) -,15,15 CM)FIG, 4-BODY BLOCK PROFILE FIG. 5-STEERING WHEEL-BODY BLOCK RELATIONSHIPS