Oil scavenger for gas-oil separator of engine

Abstract

The invention provides an oil scavenger for a gas-oil separator of an engine for preventing oil suck-back phenomena. The oil scavenger comprises a slab for separating an induction manifold from a crankcase. A circular oil return hole is disposed on the slab. A self-closing valve which is disposed under the oil return hole can automatically plug up the oil return hole under the action of the upwardairflow of the crankcase. When gas and oil are normally separated, the self-closing valve is under the oil return hole with a clearance and the separated oil turns back to the crankcase from the oilreturn hole. When suck-back phenomena is caused by the higher pressure in the crankcase of engine than the pressure in the induction manifold, the suck-back airflow will drive the self-closing valve to move upward for plugging up the oil return hole and efficiently preventing the suck-back phenomena. The oil scavenger of the invention has the advantages of simple structure, low cost, easy manufacture and installation, and better oil scavenging effect. The oil scavenger further can efficiently prevent the suck-back phenomena to ensure the gas-oil separating effect of the gas-oil separator.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to an oil-gas separator of an engine crankcase ventilation system. Background technique [0002] In order to prevent the oil and gas in the engine crankcase from escaping into the atmosphere and causing the oil to deteriorate, the engine must be equipped with an oil and gas separator. At present, there are many kinds of oil and gas separators in engines, such as labyrinth type, cyclone type, filter type, etc. These oil and gas separators are often arranged in the engine valve chamber cover or outside the valve chamber cover, and then in the valve chamber cover or An oil return hole is arranged outside to allow the oil separated by the oil-air separator to flow back into the crankcase of the engine, while the gas enters the engine through the intake manifold. Regardless of the type of oil-gas separator, the oil return effect plays an important role in the oil-gas separat...

AI Technical Summary

Problems solved by technology

Regardless of the type of oil-gas separator, the oil return effect plays an important role in the oil-gas separation efficiency. Once the pressure in the upper part of the oil return hole is lower than the pressure in the lower part, the oil will be sucked back and the effect of oil-gas separation will be greatly reduced.

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