F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
115/3, 123/95
F02B 33/02 (2006.01) F01M 3/00 (2006.01) F02M 37/00 (2006.01) F02B 61/04 (2006.01) F02B 75/02 (2006.01)
Patent
CA 1328062
ABSTRACT A marine propulsion system (200) having an outboard two cycle internal combustion engine (212) and an oil-fuel mixing fuel delivery system (2, 5, 7) has a vapor separator (702) connected to prevent excess oil in the mixture as fuel runs out. The vapor separator (702) has a fuel inlet (704) receiving fuel from the fuel tank (5), a fuel outlet (706) delivering fuel to the fuel inlet (4) of the oil-fuel mixer (2), and a vapor outlet (708) delivering vapor or air through a bypass connection (710) to the suction intake side of a fuel pump (11) and bypassing the mixer (2). The fuel pump (11) suctions oil-fuel mixture from the mixer (2). When the fuel tank (5) runs out of fuel, then air from the fuel tank (5) is sucked through the bypass connection (710) rather than through the mixer (2), which termination of flow through the mixer (2) stops further delivery of oil from the oil tank (7) to the engine (212) which would otherwise cause an overly rich oil-fuel mixture supplied to the engine (212) from the remaining oil-fuel mixture in a carburetor bowl or the like. The invention also maintains accuracy of the oil-fuel mixture ratio during normal operation.
605362
Brunswick Corporation
Mitchell Richard J.
LandOfFree
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