Air eliminating return fuel recirculation valve

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

Patent

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Details

F02M 37/00 (2006.01) F02M 37/20 (2006.01) F02M 37/22 (2006.01)

Patent

CA 2386935

A recirculating valve (26) for the fuel system (10) of an internal combustion engine (18) includes a valve body (30) with a fuel supply passage (32) and a fuel return passage (38). An air separation chamber (43) and a restricted orifice (44) are provided in the fuel return passage (38). A pressure valve (54) allows excess heated return fuel in the air separation chamber (43) to recirculate with the fuel in the fuel supply passage (22). The valve (26) also directs return air back to the tank (12) and prevents the air from passing to the engine (18). A thermal actuator (80) maintains the pressure valve (54) in a closed condition when the fuel increases above a predetermined temperature. A relief valve (90) can be provided in the fuel return outlet port (42) to allow fuel to easily pass back to tank (12) during normal operating conditions.

Le corps de vanne (30) de cette vanne de retour (26) pour circuit de carburant (10) de moteur à combustion interne (18) comporte un passage d'arrivée de carburant (32) et un passage de retour de carburant (38). Ce passage de retour de carburant (38) est pourvu d'une chambre de dégazage (43) et d'un orifice à obturateur (44). Une soupape de pression (54) permet au surplus de carburant de retour chaud de la chambre de dégazage (43) de repartir avec le carburant dans le passage d'arrivée de carburant (32). La vanne de retour (26), qui renvoie également l'air dans le réservoir (12), empêche l'air d'arriver dans le moteur (18). Un thermocouple (80) maintient la vanne de pression (54) en position fermée lorsque le carburant dépasse une température définie. Une soupape de décharge (90) peut équiper l'orifice de sortie du retour de carburant (42) de façon à permettre au carburant de repasser facilement dans le réservoir (12) dans les conditions normales de fonctionnement.

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