Breather structure for blow-by gas in internal combustion engine

Details Breather structure for blow-by gas in internal combustion engine Breather structure for blow-by gas in internal combustion engine

1996-07-11

1997-11-25

McMahon, Marguerite

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123573, F01M 1304

Patent

active

056900848

ABSTRACT:
A breather structure for a blow-by gas which is capable of reducing the oil content in a blow-by gas as much as possible. A breather structure for the blow-by gas in an internal combustion engine, in which an auxiliary machinery is provided in a crank chamber of the internal combustion engine for centrifugally separating the oil content from a blow-by gas by rotation of a rotor portion, integrated with a crank shaft, of the auxiliary machinery. A breather passage for introducing the blow-by gas from which the oil content is separated to the outside of a crank chamber is formed in an auxiliary machinery cover for covering side portions of the auxiliary machinery. In this structure, a cylindrical wall having a center axis identical to the rotational center axis of the rotor portion of the auxiliary machinery is formed in such a manner so as to project from the auxiliary machinery cover to the rotor portion. Also, an outlet is in communication with the breather passage and is formed in a base portion of the cylindrical wall. Additionally, a discharge port opened inwardly of the cylindrical wall in the rotational direction of the rotor portion of the auxiliary machinery is provided for communicating the inside with the outside of the cylindrical wall. The discharge port is formed in the cylindrical wall.

REFERENCES:
patent: 4651704 (1987-03-01), Sekiguchi
patent: 5239972 (1993-08-01), Takeyama et al.
patent: 5487371 (1996-01-01), Beckman et al.
patent: 5542402 (1996-08-01), Lee et al.

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