Engine oil-gas separation test evaluation device and method

Abstract

The invention provides an engine oil-gas separation test evaluation device and method. The device comprises a gas pretreatment device, an engine simulation device and a gas detection device, wherein the gas pretreatment device comprises an air compressor, a dryer, an air filter, an oil removal filter and a storage tank; the air compressor is connected to the storage tank through the dryer, the airfilter and the oil removal filter in sequence; the engine simulation device comprises a heatable pressure stabilization box, a front-end gas flowmeter and an engine; the gas detection device comprises an oil-gas condenser, a collecting bottle, an oil-gas filter and a rear-end gas flowmeter; and the oil-gas condenser is connected to the rear-end gas flowmeter through the collecting bottle and theoil-gas filter in sequence. According to the engine oil-gas separation test evaluation device and method, the flow, temperature and pressure generated by an oil-gas mixture can be controlled, the testmethod is closer to a real working condition of the engine, and a test result is more accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of engine oil-gas separation, and in particular relates to an engine oil-gas separation test evaluation device and method. Background technique [0002] When the engine is running, the combustible mixture and burned gas in the combustion chamber will leak into the crankcase space through the gap between the piston group and the cylinder during the compression-combustion-expansion process. , The mixed gas will also enter the crankcase through the gap between the valve and the valve guide rod. These gases are the so-called "blow-by gas" of the crankcase. [0003] In order to solve the problem of crankcase blow-by, automobile gasoline engines around the world began to adopt a closed positive crankcase ventilation system (Positive Crankcase Ventilation, abbreviated PCV) in the 1960s. The crankcase ventilation system consists of two main One is the PCV valve, the main function is to maintain the proper pressure ...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention aims to propose an engine oil-gas separation test evaluation device and method, which solves the problem that in the prior art, the amount of oil and gas passing through the oil-gas separator cannot be adjusted quickly and flexibly during the development process, and further solves the problem of When it is necessary to verify the filtering effect of the oil-gas separator on different oil and gas throughputs, it is necessary to replace multiple engines with different blow-by gas volumes or to change the engine design, which brings about a double increase in the development cost and time of the oil-gas separator.

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