QC/T 828-2010Technical specifications for automotive air-to-air charge air coolers (English PDF)

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

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°C. 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.

5.1.4.2 The parameters such as the heat release capacity and pressure drop shall be calculated in accordance with Appendix A.

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°C, 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%.

5.2 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.

5.4 Vibration test

Conduct test in accordance with those specified in JB/T 10408. The up & down, right & left and forward & backward sinusoidal vibration shall be imposed for the CAC, its vibration frequency shall be selected from small to large, the vibration shall be conducted at each […]