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QC/T 564-2008

Chinese Standard: 'QC/T 564-2008'
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Detail Information of QC/T 564-2008; QC/T564-2008
Description (Translated English): Performance requirements and bench test methods for passenger car brake
Sector / Industry: Automobile & Vehicle Industry Standard (Recommended)
Classification of Chinese Standard: T24
Classification of International Standard: 43.040.40
Word Count Estimation: 16,164
Date of Issue: 2008-06-04
Date of Implementation: 2008-11-01
Older Standard (superseded by this standard): QC/T 564-1999; QC/T 582-1999
Quoted Standard: GB/T 15089; QC/T 556
Drafting Organization: China First Automobile Group Corporation Technology Center
Administrative Organization: National Automotive Standardization Technical Committee
Regulation (derived from): NDRC Notice No. 38 of 2008
Summary: This standard specifies performance requirements for passenger car brakes and bench test method. This standard applies to GB/T 15089 specified category M1 vehicle assembly and brake linings (pads) assembly.

QC/T 564-2008
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing QC/T 564-1999 and QC/T 582-1999
Performance Requirements and
Bench Test Methods for Passenger Car Brake
乘用车制动器
性能要求及台架试验方法
ISSUED ON. JUNE 4, 2008
IMPLEMENTED ON. NOVEMBER 1, 2008
Issued by. National Development and Reform Commission of the
People's Republic of China
Attachment.
Numbers and Names of 8 Automobile Industry Standards
S.N. Standard no. Standard name Standard no. replaced
289 QC/T 79.1-2008
Road Vehicles – Coiled Pipe Assemblies for Pneumatic
Braking Connection between Motor Vehicles and Towed
Vehicles – Part 1. Dimensions
QC/T 79-1993
290 QC/T 79.2-2008
Road Vehicles – Coiled Pipe Assemblies for
Pneumatic Braking Connection between Motor Vehicles
and Towed Vehicles – Part 2. Performance
Requirements
QC/T 79-1993
291 QC/T 311-2008 Performance Requirements and Bench Test Methods for
Automobile Brake Master Cylinder
QC/T 311-1999
292 QC/T 564-2008 Performance Requirements and Bench Test Methods for
Passenger Car Brake
QC/T 564-1999
QC/T 582-1999
293 QC/T 800-2008 Method of Bed Test of Continuously Variable
Transmission for Motorcycles and Mopeds
294 QC/T 235-2008 Specifications and Test Methods for Exhaust Muffler of
Motorcycles and Mopeds
QC/T 235-1997
295 QC/T 61-2008 Specifications and Test Methods on Intensifying
Test for Engine of Motorcycles and Mopeds
QC/T 61-1993
296 QC/T 801-2008
Technical Requirements and Testing Methods of Reed
Valve Type Second Air Injectors for Motorcycles and
Mopeds
Table of Contents
Foreword ... 5 
1 Application Scope ... 6 
2 Normative References ... 6 
3 Terms and Definitions ... 6 
4 Performance Requirements ... 10 
5 Test Requirements ... 12 
6 Test Preparation ... 13 
7 Test Methods and Conditions ... 14 
Annex A (Normative) Method for Taking Braking Torque Values ... 20 
Foreword
This standard revises QC/T 564-1999, Limousine Brake Bench Test Method, and
QC/T 582-1999, Limousine Brake Performance Requirements; this revision
incorporates QC/T 564-1999 and QC/T 582-1999.
Compared with QC/T 564-1999 and QC/T 582-1999, the main changes of this
Standard are as follows.
-- it modifies the method for calculation of rotation inertia;
-- it modifies the initial braking speed and performance requirements for efficiency
test;
-- it modifies fade test conditions and evaluation method;
-- it adds abrasion test; and
-- it adds the method for taking braking torque value.
From the date of implementation, this Standard replaces QC/T 564-1999 and QC/T
582-1999.
Annex A of this Standard is normative.
The main drafting organizations of this Standard. China FAW Group Corporation
R&D Center, Chongqing Automobile Research Institute, Zhejiang Asia-Pacific
Mechanical & Electronic Co., Ltd. and Hebei Xingyue Braking Element Co., Ltd.
The main drafters of this Standard. Lin Dahai, Wang Min, Mei Zongxin, Huang
Guoxing and Shen Kunrui.
The editions of the standard replaced by this Standard are as follows.
-- JB 3980-1985 and JB 4200-1986;
-- QC/T 564-1999 and QC/T 582-1999.
Performance Requirements and
Bench Test Methods for Passenger Car Brake
1 Application Scope
This standard specifies the performance requirements and bench test methods for
passenger car brake.
This standard applies to passenger car brake assemblies and friction lining (lining
block) assemblies for vehicles of category M1 specified in GB/T 15089.
2 Normative References
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Standard,
however, parties who reach an agreement based on this Standard are encouraged
to study if the latest versions of these documents are applicable. For undated
references, the latest edition of the referenced document applies.
GB/T 15089, Classification of Power-driven Vehicles and Trailers
QC/T 556, Road Vehicle Brakes – Temperature Measurement and Thermocouple
Installation
3 Terms and Definitions
For the purposes of this Standard, the following terms and definitions apply.
3.1
braking period
the time of a continuous braking process from the start of this braking to the start of
the next braking
NOTE Braking period is expressed in s.
the ratio of average braking torque to average braking pressure within a braking
process
3.8
final braking temperature
the maximum temperature of braking drum (disc) or friction lining (lining block)
during a braking process or after braking
NOTE Final braking temperature is expressed in °C.
3.9
fade rate
the degree of fall and rise of braking torque during fade test, in percentage. And it is
calculated in accordance with Equations (1) and (2).
where
Fai – fade rate of the ith fade test, in %;
MBi – average braking torque value of the 1st braking during fade test, in Nm;
PBi – average braking pressure of the 1st braking during fade test, in MPa;
MBmin – average braking torque value relative to the braking with the minimum unit
average braking torque between the 2nd braking and the last braking, in Nm;
PBmin – average braking pressure value relative to MBmin in fade test, in MPa;
MBmax – average braking torque value relative to the braking with the max unit
average braking torque between the 2nd braking and the last braking, in Nm; and
PBmax – average braking pressure value relative to MBmax in fade test, in MPa.
3.10
recover rate
The requirements for the abrasion loss of brake friction lining (lining block) and
braking drum (disc) shall be as agreed by the supplier and the purchaser.
5 Test Requirements
5.1 Requirements for test apparatus
5.1.1 The test apparatus is an inertial brake test bench (single-wheeled or
two-wheeled); its performance indexes shall meet all test requirements of this
Standard.
5.1.2 Braking pressure supply system of the test apparatus shall meet the
requirements of all kinds of braking conditions for braking pressure and maintain
stability. The rate of rise and fall of braking pressure shall be controlled within (25 ± 5)
MPa/s.
5.1.3 The cooling equipment of brake of the test apparatus shall make the air
speed at brake tested 11 m/s and cover the whole brake assembly.
5.1.4 The control errors of braking pressure and rotation speed of the test bench
spindle shall be ± 3%. The relative error of rotation inertia (including the inertia of the
test bench rotation part) shall be ± 5%.
5.1.5 The system errors of the device recording the parameters such as braking
torque, braking pressure and test bench spindle rotation speed shall be ± 1%; the
devices and thermocouples recording the temperature of braking drum (disc) and
braking friction lining (lining block) shall be as specified in QC/T 556; when the
temperature is lower than 300°C, the error of the measuring system shall be ± 3°C
and when the temperature is higher than 300°C, it shall be ± 1°C.
5.1.6 The accuracy grade of the instruments or meters indicating all parameters
shall not be lower than grade 2.5.
5.2 Other requirements
5.2.1 All test passenger car speeds shall be rounded off to an integral multiple of 5.
5.2.2 Except fade test and that it is specified otherwise, cooling speed for the test is
11 m/s and temperature of cooling air is room temperature.
5.2.3 Unless specified otherwise, final braking speeds of all tests are zero.
5.2.4 When measuring braking noise, place the sound head of the sound level
meter in the rotation plane of brake to be tested, 500 mm right above the rotation
axis; mount the sound head in the wind guard.
where
Ga – total mass of passenger car under full load, in kg;
L – distance between shafts of passenger car, in m;
hg – gravity center height of passenger car under full load, in m;
b – distance from gravity center to rear shaft, in m; and
a – distance from gravity center to front shaft, in m.
6.4 Braking deceleration required by the test is converted into the braking torque
control value of the test bench in accordance with Equation (8).
where
Mc – braking torque control value of the test bench, Nm; and
Jc – braking deceleration......
Related standard:   QC/T 564-2018  QC/T 307-2016
   
 
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