Crankcase ventilation mechanism and engine

Abstract

The invention provides a crankcase ventilation mechanism and an engine. The crankcase ventilation mechanism comprises a valve chamber cover cap and a cylinder cover, wherein the valve chamber cover cap is provided with a first inner cavity and a second inner cavity which are isolated from each other, a first air inlet used for communicating with a crankcase and a second air inlet used for communicating with the crankcase, the first air inlet communicates with the first inner cavity, and the second air inlet communicates with the second inner cavity; and the cylinder cover is connected with thevalve chamber cover cap and provided with an air inlet flow channel and an air conveying flow channel, one end of the air inlet flow channel communicates with the first inner cavity, the other end ofthe air inlet flow channel is used for communicating with an air inlet channel of the cylinder cover, one end of the air conveying flow channel communicates with the second inner cavity, and the other end of the air conveying flow channel is used for communicating with a supercharger. According to the crankcase ventilation mechanism and the engine, a large amount of space occupied by an externalpipeline in the crankcase ventilation mechanism can be saved, lightweight design is achieved, and assembling can be completed conveniently and rapidly.

Description

technical field

[0001] The present disclosure relates to the technical field of automobile engines, in particular to a crankcase ventilation mechanism and an engine. Background technique

[0002] When the engine is working, the combustible mixture in the combustion chamber and the exhaust gas after combustion can enter the crankcase through the gap between the piston and the cylinder wall and the gap between the piston ring openings. In addition, when the supercharger is working, some blow-by air will escape from the supercharger intermediate body to the crankcase. Therefore, a crankcase ventilation mechanism is usually provided to discharge the exhaust gas in the crankcase from the crankcase in time to prevent the pressure of the crankcase from rising and avoid oil leakage and engine damage.

[0003] In the related art, the crankcase ventilation mechanism usually returns the exhaust gas to the engine for re-combustion, so as to reduce air pollution and protect the environm...

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