GB/T 35472.3-2017Test method for friction element of wet automatic transmission—Part 3: Low-speed stepped power test method (English PDF)

1 Scope

GB/T 35472 provisions of this part of the SZBL friction test machine at 3600r/min power increment test test set

Preparation, typical test conditions and parameters, test procedures, data acquisition and results reporting.

This section applies to evaluate wet friction element with the power level changes. This section does not apply to evaluate the initial friction coefficient or run-in characteristic.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 35472.1 wet automatic transmission friction element test methods - Part 1. Terms and definitions

GB/T 35472.2 wet automatic gearbox friction element test methods - Part 2 .SZBL friction test machine use guide

3 test equipment

The test equipment is a SZBL type friction tester with static engagement device. Its performance and accuracy should be consistent with the provisions of GB/T 35472.2.

The configuration of its inertia should be consistent with the provisions of Table 1.

Table 1 initial speed of 3600r/min required inertia

Ascending order of power Total inertia/(kg · m2) Incremental inertia/(kg · m2) Total energy/kJ

1 0.227 Dynamic Motor A 16.08

2 0.269 0.042 19.15

3 0.313 0.044 22.22

4 0.356 0.043 25.29

5 0.399 0.043 28.36

6 0.442 0.043 31.43

7 0.485 0.043 34.50

8 0.529 0.044 37.58

9 0.572 0.043 40.65

10 0.615 0.043 43.73

11 0.659 0.044 46.80

12 0.701 0.042 49.83 […]