GB/T 32692-2016 in English

《GB/T 32692-2016商用车辆缓速制动系统性能试验方法》由TC114（全国汽车标准化技术委员会）归口，TC114SC11（全国汽车标准化技术委员会制动分会）执行，主管部门为工业和信息化部。

Performance test methods for endurance braking systems of commercial vehicles

1 Scope

This standard specifies the performance test methods for endurance braking systems of commercial vehicles.

It is applicable to the commercial vehicles fitted with endurance braking systems.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 5620 Road vehicles - Braking of automotive vehicles and their trailers - Vocabulary
GB 12676-2014 Technical requirements and testing methods for commercial vehicle and trailer braking systems

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 5620, GB 12676-2014 and the following apply.

3.1

endurance braking system

auxiliary braking system which can provide and hold the braking efficiency for a long time without obvious performance degradation

Note 1: The endurance braking system refers to the overall system including the control device. This definition does not cover the electric regenerative braking system.

Note 2: An endurance braking system can be composed of a single device or a combination of several devices. Each device may be fitted with its own control device.

Note 3: An endurance braking system may contain one or more retarder(s), and may include:

——energy supplying device(s);

——control device(s);

——transmission device(s);

——energy dissipation device(s);

Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Test methods
4.1 General
4.2 Downhill test
4.3 Drag test
4.4 Drum test
5 Test conditions
5.1 Environment
5.2 Test site
5.3 Test vehicle preparation
6 Downhill test
6.1 General
6.2 Test track
6.3 Normal test parameters
6.4 Adjustment of specific test parameters
6.5 Test procedure
6.6 Presentation of results
7 Drag test
7.1 General
7.2 Test road
7.3 Normal test parameters
7.4 Adjustment of specific test parameters
7.5 Test requirements
7.6 Data processing and presentation of results
8 Drum test
8.1 General
8.2 Test bench
8.3 Normal test parameters
8.4 Adjustment of specific test parameters
8.5 Test requirements
8.6 Data processing and presentation of results
9 Deceleration and heat fade evaluation test for retarders
Annex A (Normative) Symbols and definitions
Annex B (Informative) Evaluation test method for deceleration and heat fade of retarders
B.1 General
B.2 Test on road
B.3 Drum test