Standard No.:	QC/T 239-2015
English Name:	Specifications and bench test methods for commercial vehicle service brake
Chinese Name:	商用车辆行车制动器技术要求及台架试验方法
Professional Classification:	QC    Professional Standard - Automobile
ICS Classification:	43.040.40 43.040.40    Braking systems 43.040.40
Issued by:	MIIT
Issued on:	2015-04-30
Implemented on:	2015-10-1
Status:	valid
Superseding:	QC/T 239-1997 Performance Requirements for Truck & Bus Brakes QC/T 479-1999 Trucks and Buses Brake Bench Test Method
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	110.0
Delivery:	via email in 1 business day

1 Scope 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. 2 Normative References The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this standard. For undated references, the latest edition (including any amendments) applies to this standard. GB/T 5620 Road Vehicles - Braking of Automotive Vehicles and Their Trailers – Vocabulary GB/T 15089 Classification of Power - Driven Vehicles and Trailers QC/T 556 Automotive Brake - Temperature Measurement and Thermocouple Attachment 3 Terminologies and Definitions For the purposes of this standard, the terminologies and definitions specified in GB/T 5620 and the following ones apply. 3.1 Braking period The time from stating a braking to the next braking in a continuous braking procedure.

Foreword I 1 Scope 2 Normative References 3 Terminologies and Definitions 4 Performance Requirements 5 Relevant Requirements for Test 6 Test Preparation 7 Test Methods and Conditions Appendix A (Normative) Evaluation Method of Braking Torque