QC/T 1168-2022 PDF English
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QC/T 1168-2022: Performance requirements and bench test methods for vehicle electric air compressor
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT1168-2022
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.40
CCS T 24
Performance requirements and bench test methods for
vehicle electric air compressor
ISSUED ON: APRIL 08, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 6
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 8
4 Performance requirements ... 9
5 Test method ... 12
Performance requirements and bench test methods for
vehicle electric air compressor
1 Scope
This document specifies the terms and definitions, performance requirements, bench
test methods of electric air compressors for automobiles.
This document is applicable to electric air compressors, which are used in commercial
vehicle pneumatic brake systems. Other electric air compressors for vehicles may make
reference to this standard.
2 Normative references
The contents of the following documents constitute the essential provisions of this
document through normative references in the text. Among them, for dated references,
only the corresponding version is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB 755-2019 Rotating electrical machines - Rating and performance
GB/T 2408-2021 Plastics - Determination of burning characteristics - Horizontal
and vertical test
GB/T 3853-2017 Displacement compressors - Acceptance tests
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 4975 Displacement compressors vocabulary - General
GB/T 4980 Determination of sound level for noise emitted by displacement
compressors
GB/T 7777 Measurement and evaluation of mechanical vibration of displacement
compressors
GB/T 10125-2021 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 18488.2-2015 Drive motor system for electric vehicles - Part 2: Test methods
GB/T 18655-2018 Vehicles, boats and internal combustion engines - Radio
disturbance characteristics - Limits and methods of measurement for the protection
of on-board receivers
GB 19153-2019 Minimum allowable values of energy efficiency and energy
efficiency grades for displacement air compressors
JB/T 7662 Displacement compressor vocabulary - Rotating compressor
JB/T 9107 Reciprocating compressors - Vocabulary
QC/T 413-2002 Basic technical requirements for automotive electric equipment
QC/T 29078-2016 Performance requirements and bench test methods of vehicle air
compressor
3 Terms and definitions
The terms and definitions as defined in GB/T 3853-2017, GB/T4975, JB/T 7662, JB/T
9107, as well as the following terms and definitions, apply to this document.
3.1
Electric air compressor
An air compressor powered by a motor.
3.2
Rated speed
The air compressor speed, which is corresponding to the rated speed of the driving
motor.
Note: The rated speed is expressed in revolutions per minute.
3.3
Rated discharge pressure
The rated working pressure required by the complete vehicle, to which the electric
air compressor is suitable.
Note: Rated exhaust pressure is expressed in MPa.
3.4
Rated condition
The working condition of the electric air compressor, operating at the rated speed,
4.5 Input specific power
The test shall be carried out, in accordance with the provisions of GB/T 19153-2019.
The unit input specific power of the electric air compressor, under rated working
conditions, shall meet the requirements of level 2 in GB/T 19153-2019.
4.6 Oil content with gas
The test shall be carried out, in accordance with the provisions of Appendix A of QC/T
29078-2016. The oil content in the exhaust of oil-lubricated electric air compressors,
under rated working conditions, shall not exceed 10 mg/m3.
4.7 Degree of protection
The overall degree of protection of the electric air compressor shall meet the
requirements of IP67 in GB/T 4208-2017.
4.8 Low temperature adaptability
The test shall be carried out, according to the requirements of 5.1. The electric air
compressor shall have no leakage of air or oil.
4.9 High temperature adaptability
The test shall be carried out, according to the requirements of 5.2. The electric air
compressor shall have no leakage of air or oil.
4.10 Vibration durability
The test shall be carried out, in accordance with the provisions in 3.12 of QC/T 413-
2002. The electric air compressor shall be able to work normally without loose fasteners,
air leakage or oil leakage.
4.11 Corrosion resistance
The test shall be carried out, according to the requirements of 5.3. The electric air
compressor shall be able to work normally, without air leakage or oil leakage. The
corrosion rate of its outer surface area shall not exceed 10%. The maximum width of a
single rust point shall not exceed 2 mm. There shall be free from cracks, wrinkles,
peeling off.
4.12 Damp heat resistance
The test shall be carried out, according to the requirements of 5.4. The electric air
compressor shall be able to work normally. Its outer surface shall be free of corrosion.
The insulation resistance of the driving motor shall meet the requirements of 4.15.
4.13 Withstand voltage
The test shall be carried out, in accordance with the provisions in 9.2 of GB 755-2019.
The leakage current of the drive motor of the electric air compressor shall not exceed
10 mA; there shall be no dielectric breakdown and arc.
4.14 Grounding resistance
The test shall be carried out, according to the requirements of 5.5. The resistance value
-- between the grounding point of the electric air compressor and the accessible metal
casing of the drive motor -- shall not be greater than 0.1 Ω.
4.15 Insulation resistance
The test shall be carried out, according to the provisions in 5.7 of GB/T 18488.2-2015.
The insulation resistance value of the electric air compressor drive motor's stator
winding to the casing shall not be less than 20 MΩ.
4.16 Flame retardant properties
The test shall be carried out, according to the provisions of GB/T 2408-2008. The flame
retardant performance of the insulating material, which is used for the drive motor of
the electric air compressor, shall comply with the HB level for horizontal combustion
and the V-0 level for vertical combustion, in GB/T 2408-2008.
4.17 Temperature rise of drive motor
The test shall be carried out in accordance with the requirements of 5.6. The temperature
rise limit of the drive motor of the electric air compressor shall comply with the
provisions of 8.10 in GB 755-2019.
4.18 Electromagnetic compatibility
The test shall be carried out, according to the requirements of 5.7. The conduction and
radiation disturbance limits of the electric air compressor's drive motor shall meet the
requirements of level 2 in GB/T 18655-2018.
4.19 Working durability
The test shall be carried out, according to the requirements of 5.8. The electric air
compressor shall have no parts damage, air leakage, oil leakage, etc. The volumetric
flow rate of the electric air compressor, after the test, shall not be lower than 95% of the
volume flow rate, before the test. The oil content in the exhaust gas shall not be greater
than 30 mg/m3.
4.20 Overload
The test shall be carried out, according to the requirements of 5.9. The electric air
compressor shall have no parts damage, air leakage, oil leakage, etc.
motor, in accordance with the provisions of 5.7 in GB/T 18488.2-2015, under this
environmental condition. Check whether the electric air compressor can work normally
and whether there is corrosion on its outer surface.
5.5 Ground resistance
Use a ground resistance tester, to measure the resistance -- between the ground point of
the electric air compressor and the accessible metal casing of the drive motor.
5.6 Temperature rise of drive motor
Start the electric air compressor. After the drive motor continues to run at the rated
power until the heat is stable, measure the temperature rise of the drive motor, according
to the provisions of 8.5 in GB 755-2019.
5.7 Electromagnetic compatibility
Start the electric air compressor. Continue to operate at the rated speed. Then carry out
the electromagnetic compatibility test, according to the conduction disturbance and
radiation disturbance test methods in GB/T 18655-2018.
5.8 Working durability
5.8.1 The volumetric flow test shall be carried out, according to the provisions in 5.6 of
GB/T 3853-2017.
5.8.2 See Figure 1, for the schematic diagram of the test device.
5.8.3 Start the electric air compressor. Make it work cyclically -- between 70% of the
rated discharge pressure and 110% of the rated discharge pressure (when the electric air
compressor has the function of shutdown and unloading, the starting pressure shall not
be lower than the maximum pressure in the unloading state) for 1000 h. The working
time shall not exceed 1 min each time, meanwhile the downtime shall be consistent
with the working time.
5.8.4 The test shall be carried out, according to the requirements of 5.1.3 and 5.1.4.
5.8.5 The volumetric flow test shall be carried out, in accordance with the provisions in
5.6 of GB/T 3853-2017. The gas-entrained oil content test shall be carried out, in
accordance with Appendix A of QC/T 29078-2016.
5.8.6 Disassemble and inspect the electric air compressor samples. Record the damage
of parts.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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