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QC/T 828-2010 English PDF (QCT828-2010)

QC/T 828-2010 English PDF (QCT828-2010)

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QC/T 828-2010: Automobile air-to-air charge air cooler technical specification
This standard specifies the technical requirements, test methods and inspection rules, marking, packing, transportation and storage of the automobile air-to-air charge air cooler assembly (hereinafter referred to as CAC).
ICS 43.040.10
T 35
INDUSTRY STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Automobile Air-to-air Charge
Air Cooler Technical Specification
ISSUED ON. AUGUST 16, 2010
IMPLEMENTED ON. DECEMBER 1, 2010
Issued by. Ministry of Industry and Information Technology of the People's Republic of China
QC
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Contents
Foreword ... I
1 Scope ... 2
2 Normative References ... 2
3 Terms and Definitions ... 2
4 Technical Requirements ... 4
5 Testing Methods ... 5
6 Inspection Rules ... 8
7 Marking, Packing, Transportation, and Storage ... 9
Appendix A (Normative) Calculation Methods for the Heat Release and Pressure Drop Tests on Air-to-air Charge Air Coolers ... 10
Appendix B (Normative) Test Record Sheet for the Heat Release and Pressure Drop Tests on Air-to-air Charge Air Coolers ... 14
Appendix C (Normative) CAC Reliability Test Record Sheet ... 16
Appendix D (Normative) Terms and Symbols ... 17
IForeword
This standard is formulated to provide the theoretical basis and technical support for the design criteria, test method and quality inspection rules of the charge air coolers (CACs), thus their performance and quality can be improved.
CAC is the important component for which the engine pressurization and intercooling technology is universally applicable to the finished automobile, its action is to cool the high pressure and temperature air after the pressurizer is pressurized so as to further increase the air inflow density and air intake of the engine, reduce the peak value of the combustion temperature, improve the engine power, reduce the oil consumption and improve the emission. The formulation of this standard is significant to the energy conservation and emission reduction of motor vehicles.
This standard is formulated by reference to the relevant standards of foreign countries such as Japan and France.
This standard is proposed and is under the jurisdiction of the National Technical Committee of Auto Standardization.
Drafting organizations of this standard. Dongfeng Motor Corporation Technical Center, Zhejiang Yinlun Machinery Co., Ltd.
Chief drafting staffs of this standard. Meng Jianjun, Fan Zhengyin, Yin Shjengdai, Xia Lifeng, Cui Jingming.
This standard is issued for the first time.
2PROFESSIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Automobile Air-to-air Charge Air
Cooler Technical Specification
1 Scope
This standard specifies the technical requirements, test methods and inspection rules, marking, packing, transportation and storage of the automobile air-to-air charge air cooler assembly (hereinafter referred to as CAC).
2 Normative References
The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
CB/T 3821 "Small and Medium Power Internal Combustion Engines - Cleanliness Measurement"
GB/T 15089 "Classification of Power-driven Vehicles and Trailers"
JB/T 10408 "Internal Combustion Engines - Test Method for Reliability of Exchangers" 3 Terms and Definitions
3.1
Air-to-air charge air cooler (CAC)
It refers to the heat exchanger which is installed between engine supercharger and intake manifold and reduces the pressurized air temperature through air cooling. 3.2
Hot side
It refers to the side at which the pressurized air passes through.
3.3
Cold side
It refers to the side at which the cooling air passes through.
3.4
CAC effectiveness
It refers to the ratio of the actual heat release of CAC to the maximum heat release under the same condition, which is expressed by the ratio of the difference of temperature at the inlet and outlet on the CAC hot side to the difference between the temperature at the inlet in the CAC hot/cold side, in % and of which the formula is as Formula (1).
%100

aciahi
ahoahi
a TT
TTE (1)
Where,
Ea——the CAC effectiveness, %;
Tahi——the inlet temperature at the hot side of CAC,℃;
Taho——the outlet temperature at the hot side of CAC, ℃;
Taci——the inlet temperature at the cold side of CAC, ℃.
3.5
Temperature rise
It refers to the difference between the outlet temperature at the hot side of CAC and the inlet temperature at the cold side of CAC, of which the formula is as Formula (2). ΔT=Taho-Taci (2)
3.6
Pressure drop of hot side (Δρah)
It refers to the pressure drop which is caused due to the pressurized air passes through the CAC under test conditions.
3.7
Pressure drop of cold side (Δρac)
It refers to the pressure drop which is caused due to the cooling air passes through the CAC under test conditions.
3.8
CAC frontal area (Af)
It refers to the windward area (core height× core width) of the CAC core. 3.9
CAC heat radiating area
It refers to the surface area of the cooling tube and heat radiating belt of the CAC which are exposed in the cooling air.
3.10
Heat release coefficient
It refers to the heat quantity which is transferred by the unit heat radiating area of CAC if the temperature changes by 1℃.
3.11
Heat rejection of hot side
The air circuit on the hot side shall be able to supply the high-temperature compressed air within 50%~150% of the rated flow for the CAC according to the specified pressure and temperature.
5.1.3 Measurement parameters.
Measurement parameters shall be as those in Appendix B.
5.1.4 Test procedures.
The CAC is installed at the test bench; start up the test equipment after the connections are confirmed by inspection to be without any leakage. Regulate the test parameters to the designated values; control the temperature of inlet air of the hot side within ±2℃. Control the pressure of the inlet air of the hot side within ±5%; control the flow of the inlet air on the hot side within ±1.5%. It is regarded that the system is sufficiently stable, then begin to measure and record the test data. In the test, data of points in each test condition are collected within the time greater than or equal to 30s.
5.1.4.1 Tests on heat radiating performance and pressure drop.
5.1.4.1.1 The air volume is the maximum air volume which is corresponding to the windward air velocity on the CAC fromt of 12m/s±0.4m/s, if the air volume is less than the above one, 4 (at least) operating points shall be selected in accordance with the test outline for each product.
5.1.4.1.2 Firstly, set the operating point of the hot side, and then change operating conditions of the cold side successively, after the operating condition of the hot side is stable, measure them; the temperature of the inlet air for the hot side in each operating point is within ±2℃, the pressure of the inlet air for the hot side is controlled within ±5% and the inlet air flow of the hot side is controlled within ±1.5%. Then change to another operating condition of the hot side and successively change the operating conditions of the cold side, at last, measure all the parameters under all the operating conditions. The test result is valid if the measurement error of its thermal balance is within ±5%.
5.1.4.2 The parameters such as the heat release capacity and pressure drop shall be calculated in accordance with Appendix A.
5.2 Sealing test
5.2.1 The CAC is connected with the air compression source on the dry inspection platform, and the CAC is immersed in the water channel; then the compressed air with the pressure of 250kPa is lead to the hot side of the CAC, and the time for pressure maintaining is greater than or equal to 30s.
5.2.2 The compressed air with the pressure of 250kPa is lead to the CAC on the dry inspection platform and the pressure drop value is measured.
5.2.3 If the test conclusions obtained through the two methods above are inconsistent, the method of wet inspection shall preferably adopted.
5.3 Static pressure test
Under the normal temperature, the media with the relative pressure of 500kPa is lead to the CAC. The pressure maintaining lasts for 3min.
5...
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