QC/T 1095-2018 PDF in English
QC/T 1095-2018 (QC/T1095-2018, QCT 1095-2018, QCT1095-2018)
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Performance requierments and bench test methods of motor vehicle assist vacuum pump
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Standards related to (historical): QC/T 1095-2018
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QC/T 1095-2018: PDF in English (QCT 1095-2018) QC/T 1095-2018
QC
AUTOMOBILE INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.40
T 24
Performance requirements and bench test methods of
motor vehicle assist vacuum pump
ISSUED ON: JULY 04, 2018
IMPLEMENTED ON: JANUARY 01, 2019
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Performance requirements ... 7
5 Test-related requirements ... 10
6 Test method ... 12
Annex:
Number, standard name, implementation date of 11 automotive industry
standards
No. Standard No. Standard name
Replaced
standard number
Date of
implementation
101
QC/T 645-
2018
Tow truck QC/T 645-2005 2019-01-01
102
QC/T 1094-
2018
General specification of lithium ion batteries for
motorcycle starting
2019-01-01
103
QC/T 1095-
2018
Performance requirements and bench test
methods of motor vehicle assist vacuum pump
2019-01-01
104
QC/T 788-
2018
Performance requirements and bench test
methods of automobile pedal device
QC/T 788-2007 2019-01-01
105
QC/T 311-
2018
Performance requirements and bench test
methods of motor vehicle brake master cylinder
QC/T 311-2008 2019-01-01
106
QC/T 564-
2018
Performance requirements and test methods for
passenger car service brake
QC/T 564-2008 2019-01-01
107
QC/T 1096-
2018
Bench test methods of fatigue life for torsion
beam rear axle of passenger cars
2019-01-01
108
QC/T 1097-
2018
Bench test methods of fatigue life for front axle
horizontal module of passenger cars
2019-01-01
109
QC/T 491-
2018
Automobile shock absorber technique
requirements and test methods
QC/T 491-1999
QC/T 545-1999
2019-01-01
110
QC/T 1098-
2018
Technical specification for powder metallurgy
hub used in automotive clutch
2019-01-01
111
QC/T 1099-
2018
Specification for collapsible spacer used in
automotive drive head assembly
2019-01-01
Performance requirements and bench test methods of
motor vehicle assist vacuum pump
1 Scope
1.1 This standard specifies the terms and definitions, performance
requirements, test-related requirements, test methods of assist vacuum pumps
used in automotive hydraulic brake systems.
1.2 This standard applies to electric vacuum pumps, that provide assist vacuum
pressure for vacuum booster servo devices, in automotive hydraulic brake
systems.
1.3 This standard does not apply to independent electric vacuum pumps.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 4942.1-2006 Degrees of protection provided by the integral design of
rotating electrical machined (IP code) - Classification
GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 10587 Specifications for salt mist testing chambers
GB/T 18655-2010 Vehicles boats and internal combustion engines - Radio
disturbance characteristics - Limits and methods of measurement for the
protection of on-board receivers
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Assist vacuum pump
shall meet the requirements specified in Table 1.
4.3.3 Resistance to mechanical vibration shock
After the mechanical vibration shock test, the evacuation air time, at room
temperature, shall meet the requirements specified in Table 1.
4.4 Environmental performance
4.4.1 Alternative high-low temperature performance
After the test according to 6.4.1, the evacuation air time, at room temperature,
shall meet the requirements specified in Table 1.
4.4.2 Heat resistance at high temperature
After the test according to 6.4.2, the evacuation air time, at room temperature,
shall meet the requirements specified in Table 1.
4.4.3 Storage at high and low temperature
After the test according to 6.4.3, the evacuation air time, at room temperature,
shall meet the requirements specified in Table 1.
4.4.4 Working performance in damp heat environment
After the test according to 6.4.4, the evacuation air time, at room temperature,
shall meet the requirements specified in Table 1.
4.4.5 Constant temperature and humidity storage performance
After the test according to 6.4.5, the evacuation air time, at room temperature,
shall meet the requirements specified in Table 1.
4.4.6 Degree of protection
4.4.6.1 The degree of protection of the sample shall not be lower than IP55,
which is specified in GB/T 4942.1-2006.
4.4.6.2 After the dustproof and waterproof performance test, the evacuation air
time, at normal temperature, shall meet the requirements specified in Table 1.
4.5 Corrosion resistance
4.5.1 Salt spray corrosion resistance
After the test according to 6.5.1, the corrosion resistance of the sample shall
meet the requirements specified in Table 3. The evacuation air time, at normal
temperature, shall meet the requirements specified in Table 1.
6.1.2.2.1 The installation of test sample, the related pipeline, the circuit
connections are the same as 6.1.2.1.1.
6.1.2.2.2 Set the test temperature of the high-low temperature test chamber to
-40 °C ± 2 °C. Start the high-low temperature test chamber. After reaching the
specified temperature, place it at this temperature for another 2 hours. THEN,
when the initial pressure, in the vacuum tank, is the standard atmospheric
pressure, start the assist vacuum pump, until the maximum vacuum is reached.
Then close the assist vacuum pump. Measure and record the time to reach the
vacuum, which is specified in Table 1, during the test, as well as the maximum
working current within 100 ms after starting, AND the working current after
starting for 400 ms.
6.1.2.3 High temperature performance
Except that the temperature of the high-low test chamber is 100 °C ± 2 °C, the
rest is the same as 6.1.2.2.
6.1.2.4 Single continuous working time
6.1.2.4.1 The installation of tested sample, pipeline, circuit connections are the
same as in 6.1.2.1.1.
6.1.2.4.2 The initial vacuum pressure in the vacuum tank is set to 35 ~ 45 kPa.
6.1.2.4.3 Start the assist vacuum pump. Turn off the vacuum pump, after 60 s
of continuous operation. During the test, the pressure in the vacuum tank shall
be kept within the range of 35 ~ 45 kPa.
6.1.2.4.4 After the test, perform the normal temperature performance test
according to 6.1.2.1.
6.2 Electrical performance
6.2.1 Overvoltage
6.2.1.1 The installation of tested sample, pipeline, circuit connections are the
same as in 6.1.2.1.1.
6.2.1.2 Carry out the test according to the test conditions specified in Table 5.
After the test, carry out the normal temperature performance test, according to
6.1.2.1.
6.3.3.3 After the test is over, carry out the normal temperature performance test,
according to 6.1.2.1. Disassemble the sample, if necessary. Record the status
of the sample.
6.4 Environmental performance
6.4.1 Alternative high and low temperature performance
6.4.1.1 Seal the air extraction port of the sample. Place the sample in a high
temperature test chamber, which has an ambient temperature of 100 °C ± 2 °C,
in the vertical direction, for 1 h. Then place the sample in a low temperature test
chamber, which has an ambient temperature of -40 °C ± 2 °C, for 1 h. This
forms 1 test cycle; totally 100 cycles are performed. The switching time between
the two temperatures shall not exceed 10 s.
6.4.1.2 After the test, perform the normal temperature performance test,
according to 6.1.2.1.
6.4.2 High temperature heat resistance
6.4.2.1 Install the sample in the temperature test chamber, according to the
actual vehicle installation state. Connect the relevant pipelines and circuits.
Carry out the test, according to the test conditions specified in Table 11.
6.4.2.2 After the test, perform the normal temperature performance test,
according to 6.1.2.1.
6.4.3 High and low temperature storage
6.4.3.1 Fix the sample, in the vertical direction, in a high-low temperature
chamber. Place it at ambient temperature of 120 °C ± 2 °C for 24 h. Then place
it at room temperature for 1 hour. Place it at ambient temperature of -40 °C ±
2 °C, for 24 hours. Finally place it at room temperature for 1 hour.
6.4.3.2 After the end of the test, perform the normal temperature performance
test, according to 6.1.2.1.
6.4.4 Working performance in damp heat environment
6.4.4.1 Fix the sample, according to the actual vehicle installation state. Put it
into the constant temperature and humidity chamber. Connect the relevant
pipelines and circuits. Carry out 7 cycles of tests, according to the test
the test, according to the corresponding degree of protection, which is specified
in Chapter 8 of GB/T 4942.1-2006.
6.4.6.1.2 After the dustproof test, perform the normal temperature performance
test, according to 6.1.2.1.
6.4.6.2 Waterproof test
6.4.6.2.1 Seal the air extraction port of the sample. Install and connect the
power harness, according to the actual vehicle installation state. Then conduct
the test, according to the corresponding degree of protection, which is specified
in Chapter 9 of GB/T 4942.1-2006.
6.4.6.2.2 After the waterproof test, perform the normal temperature
performance test, according to 6.1.2.1.
6.5 Corrosion resistance
6.5.1 Resistance to salt spray corrosion
6.5.1.1 After sealing the air extraction port of the sample, place the sample in
the salt spray test chamber, in the vertical direction. Carry out the continuous
spray test for 144 hours, according to the neutral salt spray test requirements
in GB/T 10125-2012. After the test, use the clean running water, which is not
higher than 40 °C, to remove the salt deposits from the surface of the sample.
Then use air to dry it within 2 minutes. Check and record the corrosion of the
protective layer on the surface of the sample.
6.5.1.2 After the salt spray test, the sample shall be subjected to the normal
temperature performance test, according to 6.1.2.1.
6.5.2 Surface resistance to medium
6.5.2.1 At room temperature, smear the following test medium on the outer
surface of the sample. After placing it at room temperature for 1 h, place it at an
ambient temperature of 60 °C for 24 h. Then use free air to dry it, at room
temperature.
Note: It may divide multiple areas on the surface of the same sample. Apply a
medium to each area.
a) Gasoline or diesel;
b) Brake fluid;
c) Engine oil;
d) Coolant;
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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