Fuel feed system of engine

F - Mech Eng,Light,Heat,Weapons – 02 – M

Patent

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F02M 37/00 (2006.01)

Patent

CA 2612676

A fuel feed system of an engine is provided with a gas-fuel separating unit for separating oil mist generated in an engine case from air with a labyrinth, and an auto fuel cock is operated by pressure pulsation of the air from which the oil mist is separated by the gas-liquid separating unit. Thus, infiltration of the oil mist into the auto fuel cock is suppressed to the minimum, and a malfunction of the auto fuel cock caused by accumulation of the oil can be prevented. Additionally, a breather passage for feeding the air, from which the oil mist is separated by the gas-liquid separating unit, to a breathing unit is connected the auto fuel cock via a negative pressure tube. Thus, it is unnecessary to provide a specific passage for transmitting the pressure pulsation of the air in the engine case to the auto fuel cock.

La présente invention concerne un distributeur de carburant de moteur, comprenant un dispositif de séparation gaz-liquide, séparant de l~air par un labyrinthe la dispersion d~huile produite dans un carter de moteur. Un robinet automatique de carburant est manoeuvré par la pulsation de la pression de l~air duquel la dispersion d~huile est séparée par le dispositif de séparation gaz-liquide. Ainsi, on peut éviter que le robinet automatique de carburant soit manoeuvré de façon inappropriée à cause de la stagnation du carburant à l~intérieur, en minimisant l~entrée de la dispersion de carburant dans le robinet automatique de carburant. En outre, une voie d~aération pour conduire l~air duquel la dispersion de carburant est séparée par le dispositif de séparation gaz-liquide vers un dispositif d~aération, peut communiquer avec le robinet automatique de carburant par l~intermédiaire d~un tube à pression négative. Il en résulte qu~un passage spécial pour transmettre la pulsation de pression de l~air dans le carter de moteur vers le robinet automatique de carburant ne doit pas être placé à l~intérieur du distributeur de carburant.

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