Oil-gas separation device and crankcase

Abstract

The invention belongs to the field of crankcase ventilation systems, and discloses an oil-gas separation device and a crankcase. The oil-gas separation device comprises an upper base, a lower base, a supporting assembly, a first filtering layer and a second filtering layer, the upper base and the lower base are arranged in a vertically spaced mode, an inlet is formed in the upper base, an outlet is formed in the lower base, the supporting assembly is arranged between the upper base and the lower base and comprises a first supporting piece and a second supporting piece, and the first supporting piece is arranged in the second supporting piece in a spaced mode; and the first filtering layer is attached to the inner side face of the first supporting piece, the second filtering layer is arranged on the outer side of the second supporting piece in a sleeving mode, the first supporting piece is of a solid structure, a first flow channel is formed in the upper base, a second flow channel is formed in the second supporting piece, and the second flow channel communicates with the first flow channel. The blow-by gas flows upwards in the first filtering layer and then enters the second filtering layer after passing through the first flow channel in the upper base and the second flow channel in the second supporting piece, so that the flowing path of the blow-by gas in the first filtering layer is longer, the flowing time is longer, and the filtering effect on the blow-by gas is guaranteed.

Description

technical field [0001] The invention relates to the field of crankcase ventilation systems, in particular to an oil-gas separation device and a crankcase. Background technique [0002] When the engine is working, the high-temperature and high-pressure gas burned in the power stroke cylinder will escape into the crankcase along the gap between the piston assembly and the cylinder wall, causing the crankcase to be filled with blow-by gas. The blow-by gas will increase the temperature of the crankcase and increase the evaporation of oil in the oil pan. In addition, some parts in the crankcase are splash lubricated, and oil mist will be generated during the splash lubrication process, which makes the blow-by gas contain residual fuel and combustion. In addition to the exhaust gas and carbon black, there is also a lot of engine oil. If the blow-by gas cannot be discharged in time, on the one hand, the fuel vapor in the blow-by gas will condense, which will deteriorate the engine...

AI Technical Summary

Problems solved by technology

[0003] In the existing oil-gas separation device, multiple filter layers are generally arranged from the inside to the position, and the blow-by gas passes through each filter layer in sequence along the thickness direction of the filter layer, and the filtering effect is poor.

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