QC/T 29078-2016Performance requirements and bench test methods for automotive air compressors (English PDF)
汽车用空气压缩机性能要求及台架试验方法
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
April 5, 2016
Implementation date
September 1, 2016
Scope
QC/T 29078-2016 is the English-translated version of 汽车用空气压缩机性能要求及台架试验方法.
QC/T 29078-2016 sets out the classification, performance requirements and bench test methods for vehicle air compressors, replacing QC/T 29078-1992. It applies to reciprocating piston air compressors for automobiles; units for construction machinery and other vehicles may be tested by reference to it.
Compressors are classified by standard discharge pressure into 0.8 MPa, 1.0 MPa and 1.25 MPa, by inlet and outlet valve design into plate valve and reed valve, and by cooling into water-cooled and air-cooled.
Measured volume flow and shaft power must meet the values declared in the product documentation.
The speed characteristic test plots volume flow, shaft power and discharge temperature against crankshaft speed, holds the volumetric power ratio and volumetric efficiency to Table 1, and reaches at least 120% of standard rotational speed, or 110% above 2000 r/min, over at least five measurement points.
Limits cap the drop in volumetric efficiency, the rise in unload shaft power and the drop in volume flow at 6% each, and oil carried over with the gas at 0.08 g/m3 below 2000 r/min standard speed and 0.1 g/m3 at or above.
Durability is a 500 h continuous run at standard conditions with the cooling air speed of Table 3, speed characteristics, air tightness and oil carry-over being measured before and after; an unload device runs 1000 h alternating 1 min loaded and 3 min unloaded.
Flow and power tests follow GB/T 3853, with GB/T 4980 cited as a normative reference for compressor sound level, and normative Appendices A and B cover oil carry-over by filter paper collection-weighing and lubricant consumption.
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Document preview — QC/T 29078-2016
National Standard of the People's Republic of China
- Replacing
- QC/T 29078-1992
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Announcement2
- Foreword8
- 1 Scope9
- 2 Normative references9
- 3 Terms and definitions9
- 4 Product's classification12
- 5 Performance requirements12
- 6 Test methods15
- Appendix A (Normative) Measurement method of oil discharge along with gas of air compressor - Filter paper collection-weighing method18
- Appendix B (Normative) Test method of lubricant consumption of air compressor20
1 Scope
This standard specifies the terms and definitions, product classification, performance requirements, test methods for bench test of air compressor of automobiles.
This standard is applicable to the reciprocating piston air compressors for automobiles (hereinafter referred to as "air compressor"). The air compressors for construction machinery and other vehicles may make reference to this standard.
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) are applicable to this standard.
GB/T 3853 Displacement compressors - Acceptance tests
GB/T 4980 Determination of sound level for noise emitted by displacement compressors
3 Terms and definitions
The terms and definitions as defined in GB/T 3853 as well as the following terms and definitions apply to this standard.
3.1 Standard discharge pressure, Pe
The maximum working pressure of the air compressor as adapted to the requirements of the complete vehicle (gauge pressure).
4 Product's classification
4.1 According to the standard discharge pressure of the air compressor, it is divided into three levels: 0.8 MPa, 1.0 MPa, 1.25 MPa.
4.2 According to the structure of the air inlet valve and air outlet valve of the air compressor, it is divided into plate valve and reed valve.
4.3 According to the cooling method, it is divided into water-cooled air compressor and air-cooled air compressor.
5 Performance requirements
5.1 Volume flow
The measured volumetric flow rate of the air compressor under standard conditions shall not be less than the standard volume flow as specified in the product's technical documentation.
5.2 Shaft power
The measured shaft power of the air compressor under standard conditions shall not exceed the standard shaft power as specified in the product's technical documentation.
5.3 Speed characteristics
5.3.1 The variation curve of the volumetric flow rate and shaft power of the air compressor with the crankshaft's rotational speed shall meet the technical requirements of the product. The discharge temperature shall meet the requirements of the discharge temperature of continuous working as specified in 5.3. The unload shaft power shall meet the requirements of the product's technical drawings.
5.3.2 The volumetric power ratio (q) and the volumetric efficiency (eta_v) of the air compressor shall meet the requirements of Table 1.
a) The drop of volumetric efficiency shall not exceed 6%;
b) The increase of shaft power increase under unload conditions shall not exceed 6%;
c) The drop of volume flow shall not exceed 6%;
d) For air compressors which have a standard rotational speed of less than 2000 r/min, the oil discharge along with gas shall not exceed 0.08 g/m3. For air compressors which have a standard rotational speed of more than or equal to 2000 r/min, the oil discharge along with gas shall not exceed 0.1 g/m3.
5.10 Durability of unload device
For the air compressor which is equipped with unload device, after finishing the 1000 h durability test for unload device, the unload device shall be able to work normally; the increase of shaft power under unload condition shall not exceed 6%.
6 Test methods
6.1 Volume flow
The test of volume flow of air compressor is in accordance with GB/T 3853.
6.2 Shaft power
The test of shaft power of air compressor is in accordance with GB/T 3853.
6.3 Speed characteristics
6.3.1 Under standard discharge pressure, follow the requirements of GB/T 3853 to measure the variation relationship of the volume flow, shaft power, discharge temperature of the air compressor with the crankshaft's rotational speed; draw the relevant test curve. The maximum rotational speed during the test shall not be lower than 120% of the standard rotational speed (when the standard rotational speed is higher than 2000 r/min, it shall be not less than 110%).
When using interval measurement, the number of measurement points shall not be less than 5.
After the test, calculate the volumetric efficiency and volumetric power ratio of the air compressor.
6.3.2 Under the unload conditions, follow the requirements of GB/T 3853 to measure the variation relationship of the shaft power of the air compressor.
6.6 Oil discharge along with gas
The oil discharge along with gas is measured in accordance with Appendix A.
6.7 Lubricant consumption
Lubricant consumption is measured in accordance with Appendix B.
6.8 Durability of air compressor
6.8.1 Before the durability test, first follow the requirements of 6.3, 6.4.1, 6.6 to respectively measure the speed characteristics, air-tightness, oil discharge along with gas of the air compressor.
6.8.2 Install the air compressor on the test bench of the durability of air compressor. Under standard conditions, continuously run it for 500 h. The cooling air speed is as specified in Table 3.
6.8.3 After the durability test, follow the requirements of 6.3, 6.4.1, 6.6 to respectively re-measure the speed characteristics, air-tightness, oil discharge along with gas of the air compressor.
6.9 Durability of unload device
6.9.1 Before the durability test of the unload device, first follow the requirements of 6.2 to measure the shaft power.
6.9.2 Install the air compressor on the test bench of the durability of air compressor. According to the following working modes, run it for 1000 h:
a) Run at standard condition for 1 min;
b) Run at unload condition for 3 min.
6.9.3 After the durability test, follow the requirements of 6.2 to re-measure the shaft power under the unload conditions.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of QC/T 29078
| Edition | Title | Revision | Status |
|---|---|---|---|
| QC/T 29078-2016 | Performance requirements and bench test methods for automotive air compressors | current edition | Current |
| QC/T 29078-1992 | Performance requirements and bench test methods for automotive air compressors | previous edition | Superseded |
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Related Standards
GB/T 3853-2017 — Displacement compressors -- Acceptance tests
GB/T 4980-2025 — Determination of sound level for noise emitted by displacement compressors
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QC/T 29078-2016
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