1、 GMDAT ENGINEERING STANDARDS Test Procedures Interior SUPERCEDED EDS-T-2629 Moment of Inertia for Steering Wheel This standard may be applied only for current project (T250/5). It is Superceded for all future projects and replaced by GMW14096. 3D$6* HT8 :( 42e +C ?U9I Note: 8 E:48t G8 =9 (T250/5)7 F
2、F7 957%L+ , FG P-P Program .Bd# GMW14096) $4=F7 957F$ . Copyright 2010 General Motors Company All Rights Reserved November 2010 Originating Department: GMDAT Engineering Standards Page 1 of 4 Version : 3 1 Introduction Note: Nothing in this standard supersedes applicable laws and regulations. Note:
3、In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1 Purpose. This standard aims at specifying the procedures of measuring moment of inertia for the steering wheel, thus ensuring reproducibility and reliability of the data. 1.2 Applicabilit
4、y. This standard specifies the method of measuring steering wheel moment of inertia measuring for passenger cars. For information not specified in this standard, requirements in drawings shall be followed. 2 References Note: Only the latest approved standards are applicable unless otherwise specifie
5、d. 2.1 External Standards/Specifications. None. 2.2 GM Standards/Specifications. None. 3 Test Item Moment of inertia. 4 Preparation for Test 4.1 Wire having elasticity enough not to cause length change by the weight of the steering wheel to which the airbag and other components are attached 4.2 Non-
6、Contact Laser Counter for measuring the no of free movement of the steering wheel 5 Test Procedures 5.1 The length of the wire to hold the steering wheel shall be determined in consideration of test conditions and be at least 4 m. 1 P7 :0 : ., E:48 6&F !7$ :4-8! 9I8x $4=F 3L 6$ . :0 : F67t 7568 18 8
7、8x 7 , F6* 72T8p) F$ . 1.1 +95 . ., E:48t 3D$6* HT8 :( 42e +C ?U9I907 38%P E:48x 957F$ . 2.1 17 E:4 / . F$-1F 68 . 2.2 GM E:4 / . F$-1F 68 . 3 4G F+ :( 42e +C . 4 4G :4/x 4.1 76-e -C 4) .E8x 62|/H* F 3D$6* HT8 ,h7 8F l88 -G4 2d: 68x 9I$8 A2e8x 4: :8 . 4.2 3D$6* HT8 88T7%G3L ?U9I8x 88F /x9E=4 )2F 4 m
8、 818 %L66 F$ . GMDAT ENGINEERING STANDARDS EDS-T-2629 Copyright 2010 General Motors All Company Rights Reserved November 2010 Page 2 of 4 Version : 3 5.2 Mount the steering wheel with two wires at two points representing “12 and 6 oclock” directions in the vehicle condition as shown in Fig 1. 5.3 In
9、stall the reflecting plate on the wire 50 mm above the steering wheel that can be detected by the laser counter. 5.4 Install the laser counter appropriately apart from the reflecting plate (within the distance detectable by the laser counter that does not affect the hinder free movement of the steer
10、ing wheel). 5.5 Let the steering wheel move freely by rotating it 90. 5.6 Leave it unhindered for 300 seconds after starting free movement. When the rotational movement of the steering wheel becomes stabilized, measure the no of rotations of the steering wheel for 900 seconds. 5.7 If the steering wh
11、eel comes to a stop within 900 seconds by its weight, measure its no of rotation for the maximum measurable period and then record the measuring time and no of rotation. 5.8 Conversion Formula of Moment of Inertia. Where, I: Moment of Inertia. A: Upper mounting length divided by 2 (m). B: Radius of
12、steering wheel rim (m). W: Weight of steering wheel (Kgf). H: Length of wire (m). T: Time during which the steering wheel makes reciprocation (sec/1cycle). 5.2 ,* 10 M8 3D$6* HT8x 4= 8=1B8 124 -F0 64 -F8 % 8x :87 8=F$ . 5.3 3D$6* HT).Bd 1$ 50 mm %L# :9D8 :87 )$448: ?U9IF G ?U9I480 G98G3L* d)F$ . 5.8
13、 :( 42e+C G14 . 7 d2P , I: :( 42e+C . A: 1$ ?. l8* 2) !#Q7.)G3L?U9I48Q TGMDAT ENGINEERING STANDARDS EDS-T-2629 Copyright 2010 General Motors All Company Rights Reserved November 2010 Page 3 of 4 Version : 3 Figure 1 / ,* 1 6 Evaluation Moment of inertia shall meet the design requirements. 7 Notes 7.
14、1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: EDS-T-2629 6 D4 :( 42e+C# 2X +E?* +9F7 6 F$ . 7 768 9I8 7.1 98,l 76 . F$-1F 68 . 7.2 66 -C dGl . F$-1F 68 . 8 Ed - $
15、* ,l2P! $+ &%72P ., E:48 87%T &# $80 M8 EdF$ . EDS-T-2629 GMDAT ENGINEERING STANDARDS EDS-T-2629 Copyright 2010 General Motors All Company Rights Reserved November 2010 Page 4 of 4 Version : 3 9 Release and Revisions This standard was originated in September 2000. It was first approved by GMDAT Engi
16、neering Standards in September 2000. It was first published in September 2000. 9 9P9I -C P9I 8)Y ., E:48t 2000 “x 9 87 E:4 -Gl4 .7 %L6 , d3TE:41,h7 8F 2000“x 987 38%L6$ . ., E:48t 2000“x 987 ) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 3 NOV 2010 Superceded (Interior Subsystem Validation Team) / F9I957 =* (Interior .E D4D4 )
