1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards TEST METHOD FOR THE DETERMINATIONOF DAMPING FORCES OF HYDRAULICSHOCK ABSORBER Do Not Use on New Programs. Being Replaced by GMW14243 EDS-T-2502 ISSUED DATE: 1988. 01. 29 REVISED DATE: 2008. 03. 26 VERSION: 4 (Superced
2、ed) TEST METHOD FOR THE DETERMINATION OF DAMPING FORCES OF HYDRAULIC SHOCK ABSORBER EDS-T-2502PAGE: 1/3 ISSUED DATE: 1988. 01. 29 REVISED DATE: 2008. 03. 26 VERSION: 4 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project (incl. T255 Program). It is Superceded for a
3、ll future projects and replaced by GMW14243. 1. PURPOSE This standard specifies the method for determination of damping forces of hydraulic shock absorber(hereinafter referred to as the shock absorber) 2. SCOPE This standard specifies test equipment, test condition for determining the damping force
4、of the shock absorber and the method for determining damping force characteristics. 3. EQUIPMENT 3.1. Vibrator: The device which vibrates, fixing the upper end part of shock absorber and varying the speed of the lower end part according to testing conditions. 3.2. Force measuring device: The device
5、outfitted with the meters for test stroke and speed (piston speed) and capable of measuring and recording the damping force at the stroke and the speed. 4. TEST CONDITIONS 4.1. Temperature of testing room: Room temperature 4.2. The test sample temperature at the beginning of test: 222K 4.3. Test str
6、oke length: 100mm 4.4. Speed (rpm) : 10, 25, 50, 75, 100, 200, 300 4.5. Vibration position: The center of the stroke 4.6. Prepare at least 6 test samples. 5. PERFORMANCE 5.1. Mount the test sample on test machine. 5.2. Test the test sample according to test conditions and in the automatic sequence,
7、measure and record the damping forces. 5.3. Draw damping force - displacement characteristics curve TEST METHOD FOR THE DETERMINATION OF DAMPING FORCES OF HYDRAULIC SHOCK ABSORBER EDS-T-2502PAGE: 2/3 ISSUED DATE: 1988. 01. 29 REVISED DATE: 2008. 03. 26 VERSION: 4 GM DAEWOO Auto & Technology 5.4. Dra
8、w damping force - speed characteristics curve 5.5. Determine the lag of damping force. 6. INDICATION AND LIMITING VALUES 6.1. Indicate as shown in Appendix 1 figure. 6.2. The range of damping force shall conform to those specified in the drawing. 6.3. The lag of damping forces shall be 20% max. of t
9、he test stroke. 7. RELATED STANDARDS KS R 4019 Telescopic shock absorbers GME L-0-11 Basic Test TEST METHOD FOR THE DETERMINATION OF DAMPING FORCES OF HYDRAULIC SHOCK ABSORBER EDS-T-2502PAGE: 3/3 ISSUED DATE: 1988. 01. 29 REVISED DATE: 2008. 03. 26 VERSION: 4 GM DAEWOO Auto & Technology Appendix 1 Figure 1. Force velocity characteristics Figure 2. Diagrammatic representation of damping lag
