1、 GMDAT ENGINEERING STANDARDS Test Procedures Powertrain Integration LIMITED USE EDS-T-2232 Examination of Rear Axle Oil Do Not Use on New Program; No Replacement. Examination of Rear Axle Oil Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 957%L: 6#$ . Copyright 2010 General Motors Company All
2、 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: In the event of conflict between the Korean and English language, the Korean language shall take
3、precedence. 1.1 Purpose. Test of oils for their suitability for rear axles. 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 Either 3.1 Rigging Test Stand I
4、I for Rear Axles (Bracing-Tube Design only). 3.2 Drive Line Test Stand. 4 Preparation 4.1 Assemble the rear axle to drawing specification using new gears and bearings. 4.2 An auxiliary axle must be prepared for the rigging test stand II. 4.3 Mount the rear axle assembly as installed in the vehicle.
5、4.4 Fill in the specified amount of oil to be tested. 4.5 A definite constant air cooling by means of a blower must be provided for the test axle. 4.6 The auxiliary axle is to be water cooled. 4.7 Connect the transducers and measuring instruments necessary to conduct the test: 4.7.1 Cooling air and
6、rear axle oil temperature monitoring device. 4.7.2 Torque monitoring device. 4.7.3 Monitoring equipment for rear axle housing borne sound. 5 Performance 5.1 Two test sequences (1 through 9 and 10 through 18) each having 9 increments are run according to the following schedule: GMDAT ENGINEERING STAN
7、DARDS EDS-T-2232 Copyright 2010 General Motors Company All Rights Reserved November 2010 Page 2 of 4 Version : 3 Increment Associated gear Pinion speed input (min-1) Pinion torque input (Nm) 1/10 2/11 3/12 4/13 4th 1,400 2,000 3,100 4,400 The pinion torque is to be determined from the speed torque c
8、haracteristics of the engine in question, considering the respective transmission range. Refer to example 5/14 6/15 3rd 1,800 3,100 7/16 8/17 2nd 800 1,500 9/18 1st 800 Example: Increment 6/15 : Take the appropriate Md from the speed torque curve at n = 3,100 min-1 i3rd gear. Multiply this value wit
9、h i3rd gear to obtain the pinion torque. 5.2 The rear axle is to be tested for 2 hours at each increment. 5.3 The oil sump temperature may not exceed +30 E at the beginning of each increment. 6 Bogy 6.1 For each test oil, at least one comparison test is to be conducted with the currently released pr
10、oduction oil. 6.2 If the oil sump temperature in the rear axle exceeds +200 E , the test is to be discontinued for the respective increment and continued at the next increment in the program (refer to 5.3). 7 Evaluation 7.1 Criterion for the suitability of a rear axle oil is the temperature curve at
11、 each increment. The oil sump temperatures shall be lower or not considerably higher than the temperatures measured for the same increments or released oils. 7.2 All rear axle components will be evaluated in cleaned condition by the responsible engineer (contact patterns, score marks, wear, etc.). 8
12、 Notes 8.1 Glossary. Not applicable. 8.2 Acronyms, Abbreviations, and Symbols. Not applicable. 9 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: EDS-T-2232 10 Release and Revisions This standard was originated in July 1996. It was first approved by GMD
13、AT Engineering Standards in July 1996. It was first published in July 1996. Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 3 NOV 2010 Limited use with no replacement (Chassis Subsystem Validation Team) / F9I957 ($4=E:4 68 ) =* (24 .E D4D4 ) GMDAT ENGINEERING S
14、TANDARDS EDS-T-2232 Copyright 2010 General Motors Company All Rights Reserved November 2010 Page 3 of 4 Version : 3 Rear Axle Rigging Test Stand II 1. Variable D. C. motor 2. Distributor gear box 3. Torque transducer and tachometer 4. Gear rig 5. Test axle 6. Auxiliary axle 7. Side gear box 8. Propshaft GMDAT ENGINEERING STANDARDS EDS-T-2232 Copyright 2010 General Motors Company All Rights Reserved November 2010 Page 4 of 4 Version : 3 Drive Line Test Stand 1. Variable D. C. motor (drive) 2. Test axle 3. Torque transducer and tachometer 4. Propshaft 5. Variable D. C. motor (brake)
