Crankcase ventilation system

Abstract

The invention discloses a crankcase ventilation system. The crankcase ventilation system comprises a first oil-gas separator, a ventilation pipe, a gas storage cavity, a first one-way valve and a second one-way valve, wherein the first oil-gas separator is fixedly arranged on a cylinder cover shield; one end of the ventilation pipe communicates with the first oil-gas separator, and the other end of the ventilation pipe communicates with a breather; the air storage cavity is fixedly arranged on the cylinder cover shield and provided with a gas inlet and a gas outlet, the gas inlet communicates with the ventilation pipe, and the gas outlet communicates with a crankcase; the first one-way valve is fixedly arranged at the joint between the ventilation pipe and the first oil-gas separator; and the second one-way valve is fixedly arranged at the gas outlet. According to the crankcase ventilation system provided by the invention, only through one oil-gas separator, oil-gas separation requirements can be met when an engine works in the large load state or in the small load state; and the gas storage cavity is arranged and made to communicate with the ventilation pipe and the crankcase at the same time, thus, fresh air can be introduced, and gas in the crankcase can be cleaned through the fresh air.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a crankcase ventilation system. Background technique [0002] Determined by the characteristics of the engine, during the operation of the engine, due to the gap between the piston ring and the cylinder wall, it is inevitable that some gases will continuously escape from the combustion chamber into the crankcase of the engine. It will cause the gas pressure in the engine to gradually increase, resulting in oil seal damage, crankcase gas leakage and environmental pollution. Therefore, all engines need to be equipped with a crankcase ventilation system to guide this part of the exhaust gas out of the engine, and enter the cylinder through the intake manifold to be burned. But because the gas in the crankcase will carry a certain amount of engine oil, it is necessary to separate the engine oil from the mixed gas before passing it into the cylinder for combustion, which requires the...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a crankcase ventilation system to solve the above-mentioned problems in the prior art, eliminate gaseous water or gasoline remaining in the crankcase due to blow-by gas, prevent oil emulsification, and solve the problem of gas leakage at the same time problem, protect the atmosphere

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