Engine air cylinder cap and crankshaft box ventilation circulation system

Abstract

The invention provides an engine air cylinder cap and a crankshaft box ventilation circulation system. An impact-type oil-air separation cavity and a whirlwind-type oil-air separation cavity are integrated on an air cylinder cap assembly, an air outlet passage on the end of the impact-type oil-air separation cavity is directly connected with an air inlet on the side wall on the upper part of the whirlwind-type oil-air separation cavity, the top part of the whirlwind-type oil-air separation cavity is provided with an air outlet, a siphon-type oil return structure is integrally formed on the bottom part, and the oil return structure is led to a camshaft chamber. The air outlet of the whirlwind-type oil-air separation cavity of the air cylinder cap is connected with an adjusting valve through an external connection pipeline and then is accessed to an air inlet manifold, and the air inlet manifold is re-connected with an engine cylinder body; and the siphon-type oil return structure of the whirlwind-type oil-air separation cavity of the air cylinder cap extends to the camshaft chamber, and the air cylinder cap and the camshaft chamber are communicated with an oil bottom shell through an oil return channel inside the engine cylinder body. The engine air cylinder cap can increase the compactness of the structure, can reduce the invalid pressure loss of the air flow, and can improve the oil-air separation effect.

Description

technical field [0001] The invention relates to a crankcase ventilation circulation system of an internal combustion engine and a cylinder cover technology, in particular to an engine cylinder cover and a crankcase ventilation circulation system comprising the cylinder cover. Background technique [0002] see figure 1 , in the existing engine crankcase ventilation circulation system, the cylinder head cover 7 is generally integrated with an impact separation cavity structure (ie a labyrinth oil-gas separation structure), and the first level and the second level are connected outside the cylinder head cover 7 through an external pipeline 14. The external separation chamber for secondary separation, such as the cyclone oil-gas separation chamber 3, the separated oil is introduced into the oil pan 9 through the external oil passage 17, and the separated gas is connected back to the engine intake system through the pressure regulating flow limiting valve 15 Intake manifold 16. ...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of this structure are: 1. A part of the oil-gas separation structure is integrated in the cylinder head cover, and a part is set outside the cylinder head cover, and the structure is redundant; 2. The oil-gas separation structure inside and outside the cylinder head cover needs to pass through a long external pipe High pressure loss due to ineffective gas flow, making it difficult to guarantee the oil-gas separation effect

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