QC/T 1033-2016 PDF in English
QC/T 1033-2016 (QC/T1033-2016, QCT 1033-2016, QCT1033-2016)
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Air brake--Performance requirements and bench test methods of external automatic brake adjuster
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QC/T 1033-2016: PDF in English (QCT 1033-2016) QC/T 1033-2016
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.40
T 24
Air brake - Performance requirements and bench test
methods of external automatic brake adjuster
ISSUED ON. APRIL 05, 2016
IMPLEMENTED ON. SEPTEMBER 01, 2016
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
334 QC/T 687-2016
Technical conditions
for cylinder body of
motorcycle and
moped engine
QC/T 687-2002
2016-09-01
335 QC/T 688-2016
General
specifications of
motorcycles and
mopeds
QC/T 688-2007
2016-09-01
336 QC/T 724-2016
Specification for
direct current
flasher units of
motorcycles and
mopeds
QC/T 724-2004
2016-09-01
337 QC/T 752-2016
Motorcycle and
moped catalytic
converter test
method
QC/T 752-2006,
QC/T 751-2006
2016-09-01
338 QC/T 753-2016
Motorcycles and
mopeds - The form
format of technical
parameters
QC/T 753-2006
2016-09-01
339 QC/T 1031-2016
Motorcycle and
moped wheel spline
sets
2016-09-01
340 QC/T 1032-2016
Motorcycle and
moped engine
camshaft
2016-09-01
341 QC/T 1033-2016
Air brake - External
clearance automatic
adjustment device
technical
requirements and
bench test methods
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342 QC/T 1034-2016
Rectifier bridge for
automotive
alternator
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343 QC/T 1035-2016
Electronic throttle
body for automobile
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344 QC/T 1036-2016 Automobile power inverter
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345 QC/T 1037-2016 High voltage cable for road vehicles
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346 QC/T 1038-2016
Automotive Light
Emitting Diodes
(LEDs) and
Modules
2016-09-01
347 QC/T 1039-2016
Solar sensor for
automotive air
conditioning
2016-09-01
348 QC/T 1040-2016
Motorcycle and
moped electric fuel
pump
2016-09-01
349 QC/T 1041-2016
Technical
requirements for
motorcycle
evaporative
pollutant control
systems (devices)
for motorcycles and
mopeds
2016-09-01
350 QC/T 1042-2016
Motorcycle and
moped vibration
comfort test method
2016-09-01
351 QC/T 1043-2016
Nylon tube for
automotive fuel
system
2016-09-01
352 QC/T 1044-2016 Foot pad for automobile
2016-09-01
353 QC/T 1045-2016
Heat-shrinkable
tubing for
automotive pipe
2016-09-01
354 QC/T 1046-2016
Heat pipe shrinkage
for automobile
pipeline protection
2016-09-01
355 QC/T 1047-2016 City bus plastic seat 2016-09-01
356 QC/T 1048-2016 Bus emergency hammer
2016-09-01
357 QC/T 1049-2016
Technical
requirements and
test methods for
matching of
automobile rack and
pinion hydraulic
power steering
system
2016-09-01
Table of Contents
Foreword ... 8
1 Scope ... 9
2 Normative references ... 9
3 Terms and definitions ... 9
4 Technical requirements ... 10
5 Test related requirements ... 11
6 Test methods ... 12
Air brake - Performance requirements and bench test
methods of external automatic brake adjuster
1 Scope
This Standard specifies the terms and definitions, technical requirements, test
related requirements and bench test methods for external automatic brake
adjuster of car and trailer air drum brakes.
This Standard is applicable to external automatic brake adjuster of car and
trailer air drum brakes (hereinafter referred to as “automatic brake adjuster”).
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 175, General purpose Portland cement
GB/T 5620, Road vehicles - Braking of automotive vehicles and their trailers
- Vocabulary
QC/T 32-2006, Test methods of air cleaners for automobiles
3 Terms and definitions
The terms and definitions defined in GB/T 5620 as well as the followings apply
to this Standard.
3.1 rate torque, Te
the maximum working torque value of the worm gear rotating by the brake
chamber pushing rod under the rated working pressure and the rated working
pressure
NOTE. The unit of rated torque is N•m.
150 mm arm length), and zeroing the measuring device. Then apply the same
test torque in the opposite direction to 6.2.2, while recording the displacement
of the displacement measuring device.
6.2.4 Rotate the worm shaft to turn the worm gear 72°±3°, then repeat at this
position 6.2.2 and 6.2.3.
6.2.5 Repeat 6.2.4 for a total of 3 times.
6.3 High-low temperature test
6.3.1 Immerse the automatic brake adjuster in a closed tank and apply a
constant pressure of (21±5) kPa inside the tank.
6.3.2 Remove the automatic brake adjuster from the water after 24h (do not
dry). Immediately install it on the test fixture as follows.
a) install and adjust the automatic brake adjuster according to the product
technical documentation requirements;
b) when the automatic brake adjuster is in the brake release state, the
residual torque it receives shall be (22.5 ±11.5) N•m;
c) when the torque applied by the automatic brake adjuster is 200 N•m, the
brake chamber push rod stroke shall be greater than the upper limit of the
maximum brake interval of the automatic brake adjuster.
6.3.3 Place the automatic brake adjuster and test fixture at least for 16 h in an
environmental chamber at an ambient temperature of (-40±2)°C.
6.3.4 At the end of the installation, the automatic brake adjuster is still subjected
to 3 braking tests with a test torque of 200 N•m under this ambient temperature
condition. Observe and record the operation of the automatic brake adjuster
and the brake chamber push rod stroke for each brake.
6.3.5 Adjust the automatic brake adjuster to the initial state before the low
temperature test. The sample and test fixture are then allowed to stand for at
least 16h in an environmental chamber at an ambient temperature of (80±3)°C.
6.3.6 At the end of the placement, the automatic brake adjuster is still subjected
to 100 braking tests with a test torque of 200 N•m under this ambient
temperature condition. Observe and record the operation of the automatic
brake adjuster and the stroke of the air chamber pusher during each braking.
6.4 Corrosion resistance
6.4.1 Install the automatic brake adjuster on the test fixture in the salt bath
according to the technical documentation requirements of the product.
6.5.7 After the test, adjust the torque according to 6.1.
6.6 Dust test
6.6.1 The automatic brake adjuster sample is mounted on the test fixture in the
dust chamber with a cavity size of approximately 900mm × 900mm × 900mm
as required by the product technical documentation. The distance between the
surface of the sample and the chamber shall not be less than 150mm.
6.6.2 Perform 100 brake tests at a test torque of 0.2Te or until the chamber push
stroke is stable.
6.6.3 Perform braking at a test torque of 0.2Te, and the displacement at the arm
length of 150 mm shall be recorded as the initial stroke.
6.6.4 Spread 4.5 kg of cement in accordance with GB 175 evenly on the bottom
of the box.
6.6.5 Carry out 5000 brake tests according to the test torque of 0.2Te, and the
working time of each brake shall be the same as 6.4.8.
6.6.6 During the test, in order to simulate the brake lining wear, the brake gap
shall be increased every 160 times of brake tests are performed, so that the
angle of the automatic brake adjuster is increased by 0.5°.
6.6.7 During the test, the cement is stirred once with compressed air or blower
every 15 minutes. Each stirring time is 2s, and the cement dust shall be filled
into the dust box when stirring.
6.6.8 During the test, if the working stroke measured at the arm length of 150
mm from the center of the worm gear of the automatic adjustment device
exceeds the initial stroke by 6.2 mm, the automatic adjustment mechanism of
the gap is considered to be invalid, and the test shall be terminated.
6.6.9 After the test is finished, repeat the adjustment torque according to 6.1.
6.7 Durability test
6.7.1 Gear pair integrity
6.7.1.1 Install the automatic brake adjuster on the test bench according to the
product technical documentation requirements.
6.7.1.2 Adjust the angle between the brake chamber push rod and the arm of
the automatic brake adjuster, so that when the test load reaches the rated
torque, the brake chamber push rod and the arm of the automatic brake adjuster
are in a vertical state, that is, the angle between the push rod and the arm is
90°±3°.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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