QC/T 1095-2018Performance requirements and bench test methods for automotive auxiliary vacuum pumps (English PDF)

4.3.3 Resistance to mechanical vibration shock

After the mechanical vibration shock test, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1.

4.4 Environmental performance

4.4.1 Alternative high-low temperature performance

After the test according to 6.4.1, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1.

4.4.2 Heat resistance at high temperature

After the test according to 6.4.2, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1.

4.4.3 Storage at high and low temperature

After the test according to 6.4.3, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1.

4.4.4 Working performance in damp heat environment

After the test according to 6.4.4, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1.

4.4.5 Constant temperature and humidity storage performance

After the test according to 6.4.5, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1.

4.4.6 Degree of protection

4.4.6.1 The degree of protection of the sample shall not be lower than IP55, which is specified in GB/T 4942.1-2006.

4.4.6.2 After the dustproof and waterproof performance test, the evacuation air time, at normal temperature, shall meet the requirements specified in Table 1.

4.5 Corrosion resistance

4.5.1 Salt spray corrosion resistance

After the test according to 6.5.1, the corrosion resistance of the sample shall meet the requirements specified in Table 3. The evacuation air time, at normal temperature, shall meet the requirements specified in Table 1.

6.1.2.3 High temperature performance

Except that the temperature of the high-low test chamber is 100 °C ± 2 °C, the rest is the same as 6.1.2.2.

6.1.2.4 Single continuous working time

6.1.2.4.1 The installation of tested sample, pipeline, circuit connections are the same as in 6.1.2.1.1.

6.1.2.4.2 The initial vacuum pressure in the vacuum tank is set to 35 ~ 45 kPa.

6.1.2.4.3 Start the assist vacuum pump. Turn off the vacuum pump, after 60 s of continuous operation. During the test, the pressure in the vacuum tank shall be kept within the range of 35 ~ 45 kPa.

6.1.2.4.4 After the test, perform the normal temperature performance test according to 6.1.2.1.

6.2 Electrical performance

6.2.1 Overvoltage

6.2.1.1 The installation of tested sample, pipeline, circuit connections are the same as in 6.1.2.1.1.

6.2.1.2 Carry out the test according to the test conditions specified in Table 5. After the test, carry out the normal temperature performance test, according to 6.1.2.1.

6.3.3.3

After the test is over, carry out the normal temperature performance test, according to 6.1.2.1. Disassemble the sample, if necessary. Record the status of the sample.

6.4 Environmental performance

6.4.1 Alternative high and low temperature performance

6.4.1.1 Seal the air extraction port of the sample. Place the sample in a high temperature test chamber, which has an ambient temperature of 100 °C ± 2 °C, in the vertical direction, for 1 h. Then place the sample in a low temperature test chamber, which has an ambient temperature of -40 °C ± 2 °C, for 1 h. This forms 1 test cycle; totally 100 cycles are performed. The switching time between the two temperatures shall not exceed 10 s.

6.4.1.2 After the test, perform the normal temperature performance test, according to 6.1.2.1.

6.4.2 High temperature heat resistance

6.4.2.1 Install the sample in the temperature test chamber, according to the actual vehicle installation state. Connect the relevant pipelines and circuits. Carry out the test, according to the test conditions specified in Table 11.

6.4.2.2 After the test, perform the normal temperature performance test, according to 6.1.2.1.

6.4.3 High and low temperature storage

6.4.3.1 Fix the sample, in the vertical direction, in a high-low temperature chamber. Place it at ambient temperature of 120 °C ± 2 °C for 24 h. Then place it at room temperature for 1 hour. Place it at ambient temperature of -40 °C ± 2 °C, for 24 hours. Finally place it at room temperature for 1 hour.

6.4.3.2 After the end of the test, perform the normal temperature performance test, according to 6.1.2.1.

6.4.4 Working performance in damp heat environment

6.4.4.1 Fix the sample, according to the actual vehicle installation state. Put it into the constant temperature and humidity chamber. Connect the relevant pipelines and circuits. Carry out 7 cycles of tests.

6.4.6.1.2

After the dustproof test, perform the normal temperature performance test, according to 6.1.2.1.

6.4.6.2 Waterproof test

6.4.6.2.1 Seal the air extraction port of the sample. Install and connect the power harness, according to the actual vehicle installation state. Then conduct the test, according to the corresponding degree of protection, which is specified in Chapter 9 of GB/T 4942.1-2006.

6.4.6.2.2 After the waterproof test, perform the normal temperature performance test, according to 6.1.2.1.

6.5 Corrosion resistance

6.5.1 Resistance to salt spray corrosion

6.5.1.1 After sealing the air extraction port of the sample, place the sample in the salt spray test chamber, in the vertical direction. Carry out the continuous spray test for 144 hours, according to the neutral salt spray test requirements in GB/T 10125-2012. After the test, use the clean running water, which is not higher than 40 °C, to remove the salt deposits from the surface of the sample. Then use air to dry it within 2 minutes. Check and record the corrosion of the protective layer on the surface of the sample.

6.5.1.2 After the salt spray test, the sample shall be subjected to the normal temperature performance test, according to 6.1.2.1.

6.5.2 Surface resistance to medium

6.5.2.1 At room temperature, smear the following test medium on the outer surface of the sample. After placing it at room temperature for 1 h, place it at an ambient temperature of 60 °C for 24 h. Then use free air to dry it, at room temperature.

Note: It may divide multiple areas on the surface of the same sample. Apply a medium to each area.

a) Gasoline or diesel;

b) Brake fluid;

c) Engine oil;

d) Coolant;