Whirlwind type oil-gas separator having self-sealing oil return structure

Abstract

The invention relates to a whirlwind type oil-gas separator having a self-sealing oil return structure. The whirlwind type oil-gas separator is used for solving the technical problems of the present whirlwind type oil-gas separator that the oil-gas separation efficiency is low and the oil return is unsmooth. The whirlwind type oil-gas separator comprises an upper cover, a first sleeve, a second sleeve and a bottom shell, wherein the first sleeve and the second sleeve are assembled and are mounted in a cavity formed by the bottom shell and the upper cover; and the bottom shell is fixed on an engine cylinder cover through a mounting hole on an outer wall of the bottom shell. According to the whirlwind type oil-gas separator, three oil-gas separating mechanisms with different structures are used for performing three-level separation, so that a separating effect is obvious and thorough; the whirlwind type oil-gas separator has the characteristics of simple structure, convenience in mounting, low in manufacturing cost and long in service life; the oil-gas separating efficiency is increased, so that the influence of vehicle exhaust on the atmospheric environment is reduced; and the emission performance and the economic performance of the vehicle are improved.

Description

technical field [0001] The invention relates to an oil-gas separator for a crankcase ventilation system of an automobile engine, in particular to a cyclone-type oil-gas separator with an oil return structure, belonging to the technical field of engines. Background technique [0002] With the increase in the global car ownership, the air pollution caused by automobile exhaust is becoming more and more serious, and the regulatory requirements on automobile emissions in various countries are becoming more and more strict. Energy saving and emission reduction have become the main goals pursued by major automobile companies. Engine crankcase blow-by gas is one of the main causes of automobile emission pollution. The crankcase ventilation system using oil and gas separator is an effective measure to reduce crankcase exhaust gas. [0003] The oil and gas separators in the prior art mainly include labyrinth baffle type, cyclone type, centrifugal type, filter element type and electro...

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Problems solved by technology

[0003] The oil-gas separators in the prior art mainly include labyrinth baffle plate type, cyclone type, centrifugal type, filter element type and electrostatic type, among which the separation efficiency of the labyrinth baffle plate type oil-gas separator is low, and the shape of the cylinder head cover is complicated; the centrifugal type Although the filter element and electrostatic oil-gas separators have high oil-gas separation efficiency, their manufacturing or use costs are relatively high; the cyclone-type oil-gas separator has the advantages of easy installation, low price, and long life, but it has low oil-gas separation efficiency. , the disadvantage of poor oil return

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