FMVSS 571.202 Standard No. 202
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ID： |
3F15B25C3FCA4718B27DC89385474BED |
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文件大小(MB)： |
0.03 |
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页数： |
3 |
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文件格式： |
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日期： |
2008-8-25 |
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购买： |
文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
474,§ 571.202 49 CFR Ch. V (10–1–03 Edition),[62 FR 16725, Apr. 8, 1997; 63 FR 28, Jan. 2,1998; 63 FR 41464, Aug. 4, 1998; 63 FR 45965,Aug. 28, 1998; 64 FR 7140, Feb. 12, 1999; 64 FR,69671, Dec. 14, 1999; 67 FR 41354, June 18, 2002;,68 FR 51711, Aug. 28, 2003],EFFECTIVE DATE NOTE: At 67 FR 79439, Dec.,23, 2002, § 571.201 was amended by removing,the definition of motor home in S3, Definitions,effective Dec. 27, 2004.,§ 571.202 Standard No. 202; Head restraints.,S1. Purpose and scope. This standard,specifies requirements for head restraints,to reduce the frequency and,severity of neck injury in rear-end and,other collisions.,S2. Application. This standard applies,to passenger cars, and to multipurpose,passenger vehicles, trucks and,buses with a GVWR of 4,536 kg or less.,VerDate jul<14>2003 09:13 Dec 08, 2003 Jkt 200207 PO 00000 Frm 00474 Fmt 8010 Sfmt 8010 Y:\SGML\200207T.XXX 200207T,ER08AP97.009,475,Nat’l Highway Traffic Safety Admin., DOT § 571.202,S3. Definitions. Head restraint means a,device that limits rearward angular,displacement of the occupant’s head,relative to his torso line.,S4. Requirements.,S4.1 Each passenger car shall comply,with S4.3.,S4.2 Each truck, multipurpose passenger,vehicle and bus with a GVWR of,4,536 kg or less, shall comply with S4.3.,S4.3 Performance levels. Except for,school buses, a head restraint that conforms,to either (a) or (b) shall be provided,at each outboard front designated,seating position. For school,buses, a head restraint that conforms,to either (a) or (b) shall be provided for,the driver’s seating position.,(a) It shall, when tested in accordance,with S5.1, during a forward acceleration,of at least 78 m/s2 on the seat,supporting structure, limit rearward,angular displacement of the head reference,line to 45° from the torso reference,line; or,(b) It shall, when adjusted to its fully,extended design position, conform to,each of the following—,(1) When measured parallel to torso,line, the top of the head restraint shall,not be less than 700 mm above the seating,reference point;,(2) When measured either 64 mm,below the top of the head restraint or,635 mm above the seating reference,point, the lateral width of the head restraint,shall be not less than—,(i) 254 mm for use with bench-type,seats; and,(ii) 171 mm for use with individual,seats:,(3) When tested in accordance with,S5.2, the rearmost portion of the head,form shall not be displaced to more,than 102 mm perpendicularly rearward,of the displaced extended torso reference,line during the application of,the load specified in S5.2(c); and,(4) When tested in accordance with,S5.2, the head restraint shall withstand,an increasing load until one of the following,occurs:,(i) Failure of the seat or seat back; or,(ii) Application of a load of 890 N.,S5. Demonstration procedures.,S5.1 Compliance with S4.3(a) shall,be demonstrated in accordance with,the following with the head restraint,in its fully extended design position:,(a) On the exterior profile of the head,and torso of a dummy having the,weight and seated height of a 95th percentile,adult male with an approved,representation of a human, articulated,neck structure, or an approved equivalent,test device, establish reference,lines by the following method:,(1) Position the dummy’s back on a,horizontal flat surface with the lumbar,joints in a straight line.,(2) Rotate the head of the dummy,rearward until the back of the head,contacts the same flat horizontal surface,in paragraph (1).,(3) Position the SAE J–826 two-dimensional,manikin’s back against the,flat surface in S5.1(a)(1), alongside the,dummy with the h-point of the manikin,aligned with the h-point of the,dummy.,(4) Establish the torso line of the,manikin as defined in SAE Aerospace-,Automotive Drawing Standards, sec.,2.3.6, P.E1.01, September 1963.,(5) Establish the dummy torso reference,line by superimposing the torso,line of the manikin on the torso of the,dummy.,(6) Establish the head reference line,by extending the dummy torso reference,line onto the head.,(b) At each designated seating position,having a head restraint, place the,dummy, snugly restrained by a Type 1,seat belt, in the manufacturer’s recommended,design seated position.,(c) During forward acceleration applied,to the structure supporting the,seat as described in this paragraph,measure the maximum rearward angular,displacement between the dummy,torso reference line and head reference,line. When graphically depicted, the,magnitude of the acceleration curve,shall not be less than that of a halfsine,wave having the amplitude of 78,m/s2 and a duration of 80 milliseconds,and not more than that of a half-sine,wave cu……
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