QC/T 239-2015: Translated English of Chinese Standard. (QCT 239-2015, QC/T239-2015, QCT239-2015): Specifications and Bench Test Methods for Commercial Vehicle Service Brake
https://www.chinesestandard.net, 2017 M09 15 - 21 pages
This standard specifies the terminologies and definitions, performance requirements as well as bench test methods of commercial vehicle service brake assembly. This standard applies to the service brake assembly for Categories M2, M3 and N vehicles specified in GB/T 15089 as well as friction lining (brake block) assembly. The brake assembly for Category O vehicles may also refer to the provisions of this standard.
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4 Performance Requirements
5 Relevant Requirements for Test
6 Test Preparation
7 Test Methods and Conditions
Appendix A Normative Evaluation Method of Braking Torque
according to Formula average braking pressure average braking torque axle brake Bench Test Methods brake disc brake drum disc braking efficiency test braking final temperature braking in fade braking period braking pressure value braking torque value bright film calculated according Category N1 vehicles conducted according cracks Drum Brake drum or brake force distribution ratio friction lining brake friction surface GB/T hydraulic brake initial braking speed initial braking temperature km/h for Category last braking lining brake block M2 vehicles maximum braking torque N1 and Category normal temperature efficiency output braking torque published by China QC/T reference test rotational inertia running-in test second efficiency test specified braking pressure speed is 50 stability for braking stability for speed standards were organized standards were published surface of brake temperature efficiency test test bench cooling test bench main test conditions test equipment test were modified Tested according thermal braking efficiency Thermocouple torque over average wear test