A test device and method for testing engine pcv flow by simulating engine state
A state test and test device technology, which is used in engine test, measurement device, machine/structural component test, etc., can solve the problems of lack of system flow test, one-sidedness, inaccurate data, etc. The effect of low cost and simple structure
Active Publication Date: 2016-01-20
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology
However, it is very one-sided to understand the entire system in this way, and there is a lack of testing of the entire system traffic
Now, although the traffic data can be obtained by calculation, due to the influence of various factors, the data is often not very accurate
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[0021] see figure 1 , the main structure of the device includes: 1. Power supply, 2. Frequency conversion motor, 3. Compressor, 4. The first stabilizing chamber, 5. The second stabilizing chamber, 6. Flowmeter, 7. PCV valve, 8. The first 1. Pressure regulating valve, 9. Second pressure regulating valve, 10. First pressure gauge, 11. Second pressure gauge.
[0022] Among them, the power supply 1, frequency conversion motor 2, and compressor 3 constitute the vacuum part of the device. The first pressure stabilizing chamber 4 simulates the intake manifold of the engine, the first pressure regulating valve 8 simulates the throttle body of the engine, and the air outlet of the compressor simulates the intake manifold of the engine. The air leakage of the engine piston is regulated by the second pressure regulating valve 9 .
[0023] The whole working cycle of the test method of simulated engine state test PCV valve flow of the present invention is as follows:
[0024] 1. Vacuum p...
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The invention relates to a test device for testing PCV (pressure controlled ventilation) value through simulating the engine state. The test device comprises a power supply, a variable-frequency motor, a compressor, two pressure stabilizing cavities, a flow meter, a PCV value, two pressure regulating valves and two pressure meters, wherein the power supply, the variable-frequency motor and the compressor form a vacuum part of the device, the first pressure stabilizing cavity simulates an intake manifold of an engine, the first pressure regulating valve simulates a throttle body of the engine, the outlet gas of the compressor simulates the piston gas leakage quantity of the engine, and the regulation is carried out through the second pressure regulating valve. The test device has the advantages that the structure is simpler, the PCV flow under the engine operation state can be accurately simulated for testing, and the prospective matching of PCV characteristics and pipelines is convenient in the development early period of PCV products.
Description
technical field [0001] The invention relates to a new test method for simulating the working cycle of the whole engine tortuous system and testing the PCV flow. Background technique [0002] In the engine crankcase ventilation test, generally only the temperature and pressure of the entire system are measured. However, it is very one-sided to understand the entire system in this way, and there is a lack of testing of the entire system traffic. Now, although the flow data can be obtained through calculation, due to the influence of various factors, the data is often not very accurate. Accurate flow data, combined with pressure and pipe diameter, can provide an optimal matching solution for engine design. On the one hand, it can solve the problem of crankcase positive pressure, and on the other hand, it can match the best value of PCV flow. However, there is still a simple and effective method for obtaining the accurate flow data at present. Contents of the invention [0...
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IPC IPC(8): G01M15/00
Inventor 代昌建黄春玉向垒饶利东
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD