1、 GMDAT ENGINEERING STANDARDS General Specification Chassis SUPERCEDED EDS-T-2604 Power Steering Hose Performance Test Procedure This standard may be applied only for current project (incl. 200 Series). It is Superceded for all future projects and replaced by GMW14600, GMW15348 and GMW15422. D76 3D$6
2、* Gl38 2e# 4G 98 88x 7 , F6* 72T8p) F$ . 1.1 +95 . ., E:48t 37=7 D8 3D$6* Gl38 2e# 4G 907 38%P E:48x 957F$ . 2.1 17 E:4 / . ISO1402 BS 5173 2.2 GM E:4 / . F$-1F 68 . 3 4G 8? 3.1 +# 8* 4G d . 3.2 8T6 4*$ . 3.3 6)Y . 3.4 948 7d . 3.5 6)Y =$ -l/ . 3.6 /$)O (Accuracy: 0.05cm3). 3.7 X - Y d) . GMDAT ENGI
3、NEERING STANDARDS EDS-T-2604 Copyright 2010 General Motors All Company Rights Reserved November 2010 Page 2 of 5 Version : 4 4 Sample Preparations 4.1 Number of Samples. At least 3 for approval test and at least 1 for regular quality check test. 4.2 Conditions. Samples shall be tested at least 7 day
4、s after manufacturing for approval test, and 3 days for regular quality check. Before test, samples shall be exposed to 23 E 5K for over 8 hours under no-load conditions. 5 Test Method Test shall be conducted at 23 E 5K except specified otherwise in the drawing. 5.1 Tensile Force Test. 5.1.1 Mount t
5、he sample including end fitting on the U.T.M without torsion. 5.1.2 While testing at 50mm/min., record the force-displacement diagram. 5.2 Burst Pressure Test. 5.2.1 Mount the sample on the test equipment without torsion and tension. 5.2.2 Fill the sample with test liquid and remove air bubble. 5.2.
6、3 Use the hydraulic cylinder to apply pressure up to the test pressure (PB) at a constant speed as in Table 1. 4 4G E :4/x 4.1 4G E 3L( . 4G E 3L(8t 38 4G 47# 3P 81 , 9Id E: B 4G 47# 1P 818p) F$ . 4.2 4G E8 9 . 38 4G 47# 9P9 G 2F 78 , 8-L958 E:B 4G 47# 9P9 G 2F 7248 0G 4G F7 6 F+ 4G 98 -L (Tension)8
7、 6$) 8=F$ . 5.2.2 4G E!7 4G 68x =x7 dE (AIR BUBBLE)* 9PF$ . 5.2.3 8T6 4*$* 17F7 4G 6)Y (PB): E 10 M8 89I 2$) 46F$ . Table 1: Pressure-application speed (Refer to ISO 1402) / E 1: 4G 6)Y7 &d* 462$ (ISO 1402 =l9 ) Test Pressure (PB) / 4G 6)Y (PB) Speed / 46 2$ PB d 12.5 MPa PB 12.5 MPa PB t 40 MPa 0.0
8、75 ) 0.175 MPa/sec 0.35 ) 1.0 MPa/sec 120 sec max. 5.2.4 Measure burst pressure when the sample produces leak or cracks. 5.2.5 Exclude from evaluation failure occurring within 25mm from the end fitting and coupling or within the same length as external diameter of the hose. In such cases, test again
9、 with a new sample. (Refer to ISO1402). 5.3 Volumetric Expansion Test 5.3.1 Mount the sample on the test equipment as in paragraphs 5.2.1 and 5.2.2. 5.3.2 While applying pressure up to the maximum test pressure(9 MPa), keep it for 305 sec. and release pressure for 12010 sec. 5.2.4 4G E8 #88T (Leak)
10、D# A ( (Crack), D7(48 6)Y8x ?U9IF$ . 5.2.5 End Fitting. -C F* (Coupling). 25 mm 8! D# Gl38 7. :0 % 8 l8 8!72P8 D2 (Failure)8t D472P 9P7F+ 1)7 4G E8p) 8 44F$ . (ISO1402 =l9 ). 5.3 .Fp Dq=q 4G 5.3.1 5.2.1F -C 5.2.2F0 M8 4G E8x 4G 8?7 8=F$ . 5.3.2 $4 4G 6)Y (9MPa): 46F7 30r5 -l/ (Outlet Valve)* 7(6 /$)
11、O7 4G 68 60r5 -l/* $ 4G 68 13 F8x 8#$ . 5.3.6 1P8 4G E7 $4F7 888 09I8x 3G 44F7 , D F8x ?U9IF8p) F$ . 5.4 l8 -G 4G (ISO1402 -C BS5173 =l9 ). 5.4.1 5.2.1F -C 5.2.2F0 M8 4G E8x 4G 8?7 8=F$ . 8& 4G E8t 3LD8p) F$ . 5.4.2 ) 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 )
