1、 GMDAT ENGINEERING STANDARDS Test Procedures Chassis SUPERCEDED EDS-T-2622 Rack and Pinion Steering Gear Ratio This standard may be applied only for current project (incl. 200 Series). It is Superceded for all future projects and replaced by GMW14396 and GMW15430. ( -Fp#6 3D$6* d6 /x8 Note: 8 E:48t
2、G8 =9 (200 SeriesE F ) 7 FF7 957%L+ , FG P-P Program .Bd# GMW14396 -C GMW15430 ) $4=F7 957F$ . Copyright 2010 General Motors Company All Rights Reserved November 2010 Originating Department: GMDAT Engineering Standards Page 1 of 2 Version : 4 1 Introduction Note: Nothing in this standard supersedes
3、applicable laws and regulations. Note: In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1 Purpose. The purpose of this specification is to determine the C-factor (rack gain: rack travel in mm per pinion revolutions) 1.2 Applicability. Not
4、 applicable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None. 2.2 GM Standards/Specifications. None. 3 Equipment 3.1 Dial Indicator to read tangential pinion movement. 3.2 Sliding Rule. 4 Procedure 4.1 Adjus
5、t steering gear to drawing specification. 4.2 Attach dial indicator to pinion shaft. 4.3 Measure total steering angle from lock to lock (). 4.4 Measure total rack travel from lock to lock (mm). 4.5 Determine the C-factor to the following equation: uu volutionsmmanglesteeringTotaltravelrackTotalRe360
6、GAINRACK 1 P7 :0 : ., E:48 6&F !7$ :4-8! 9I8x $4=F 3L 6$ . :0 : F67t 7568 18 88x 7 , F6* 72T8p) F$ . 1.1 +95 . ., E:48t ( 8 (Fp#6 G983L $- -4*-,Bd) E4%P ( 8% ( )9I8x +958p) F$ . 1.2 957 -88 . F$-1F 68 . 2 4) E:4 / :0 : C-H +d%P 9I8 6# F 48 07 38%P E:48x 957F$ . 2.1 17 E:4 / . F$-1F 68 . 2.2 GM E:4 /
7、 . F$-1F 68 . 3 4G 8/x 3.1 ( 8% (8x 88x 3L 8# l8-Gd . 3.2 3D$6* 5$ ?U9I8? . 4 4G 97 l8-Gd* .=F$ 4.3 8t 88?72P 8t 88?: (Lock to Lock) 8 3D$6* 5 ()8x ?U9IF$ . 4.4 8t 88?72P 8t 88?: (Lock to Lock) 8 98= ( 8% ( (mm)8x ?U9IF$ . 4.5 $8)47 &d( ( 88x 9IF$ . uu H:Z4nW4EF8 ,:Z?9&/*):Z? 9) mm360 GAIN)(RACK GMD
8、AT ENGINEERING STANDARDS EDS-T-2622 Copyright 2010 General Motors All Company Rights Reserved November 2010 Page 2 of 2 Version : 4 5 Requirements The C-factor must be within the tolerance range specified on the drawing. 6 Notes 6.1 Glossary. Not applicable. 6.2 Acronyms, Abbreviations, and Symbols.
9、 Not applicable. 7 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: EDS-T-2622 8 Release and Revisions This standard was originated in July 1996. It was first approved by GMDAT Engineering Standards in July 1996. It was first published in July 1996. 5 7
10、 9 ( 88t $+7 :9I%P )= !7 866 F$ . 6 768 9I8 6.1 98,l 76 . F$-1F 68 . 6.2 66 -C dGl . F$-1F 68 . 7 Ed - $* ,l2P! $+ &%72P ., E:48 87%T &# $80 M8 EdF$ . EDS-T-2622 8 9P9I -C P9I 8)Y ., E:48t 1996 “x 7 87 E:4 -Gl4 .7 %L6 , d3TE:41,h7 8F 1996“x 787 38%L6$ . ., E:48t 1996“x 787 ) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 4 NOV 2010 Superceded (Chassis Subsystem Validation Team) / F9I957 =* (24 .E D4D4 )
