Cooling and heating system of automobile engine low temperature cold start test cabinet

The low-temperature cold-start test cabin of an automobile engine, as the name implies, is that the engine or the entire vehicle (buses, trucks, cars, and other types of vehicles, regardless of gasoline or diesel vehicles) is cold-started at low temperatures. It can be used for engine low temperature cold start, as well as engine room temperature performance and emission test.

The low-temperature cold-start test cabin of the automobile engine can be used for low-temperature cold start, as well as normal temperature performance and emission tests (when the freezer is not working). The engine cold-start test cabin has a cabin, a refrigeration system, a heating system, an air convection circulation system, The cold start cabin is composed of mechanical connection system, computer control system and safety protection system. Safe and reliable operation, fully meet the user’s test requirements.

The start-up operation of the engine will inhale the air in the test room. In order to ensure the balance of the pressure in the test room and the requirements of engine and personnel oxygen consumption, the room must be supplemented with an appropriate amount of fresh air. Due to the output of untreated fresh air, the temperature and humidity parameters in the test room will be out of control, and the test requirements will not be met. At the same time, the appropriate amount of fresh air supply can improve the control performance of the laboratory and reduce consumption. Therefore, constant temperature and humidity purification must be performed on the introduced fresh air deal with. The state of the new fan set is determined by the central control detection laboratory setting parameters and the external environment.

experiment procedure:

1. Make sure the function of the tested sample is intact before the test

2. Lead the voltage points of the DC/DC power module on the sample separately with wires.

3. Place the sample in the test box and connect the wiring harness. There should be no contact between the various products. After the temperature of the test chamber drops to the set temperature of -40℃, the sample is placed under this condition for 2 hours.

4. Connect the lead line of a certain voltage point of the tested sample to the oscilloscope, the oscilloscope is set to the rising edge trigger mode, and the sampling time is set to us level. Turn on the power of the sample to be measured, grab the start waveform of the voltage point, and save the waveform.

5. After the waveform capture is completed, turn off the power of the tested sample. Let stand for 10min and repeat step 3. (After completing a waveform grab test, turn off the power of the tested sample for 10 minutes)

6. After the whole test is completed, turn off the power of the test box according to the operating steps of the high and low temperature test box.

The cooling system, heating system and air convection circulation system in the test cabin can be provided by LNEYA. For example, our KRY series test cooler circulators usually require infinite circulation when performing tolerance tests. Equipped with a powerful circulation pump, while ensuring the delivery of high-viscosity liquids. The temperature change is usually in the range of -40 to 100 degrees (expandable to 150 degrees), and the temperature change curve of the test component can be recorded and exported as data analysis.

Leave a Reply