Fuel primer and enrichment system for an internal combustion engine
AssigneeOutboard Marine Corporation
InventorsGene F. Baltz, Paul W. Breckenfeld
Life of this patent
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Abstract
An engine comprises a combustion chamber and a fuel transfer passage having a fuel outlet port communicating with the combustion chamber. A primary fuel delivery system communicates with the combustion chamber and introduces fuel from the fuel source into the combustion chamber. The engine further comprises a fuel pump which is adapted to be connected with a source of fuel and a fuel return line having a first end communicating with the source. A mechanism selectively controls the communication of the fuel pump with either the fuel return line or the fuel transfer passage, so that an enriched flow of fuel can be selectively supplied to the combustion chamber prior to and after starting.
Claims11
An engine comprising a combustion chamber having a fuel port, a primary fuel delivery means adapted for connection to a source of fuel and communicating with said combustion chamber for introducing fuel from the fuel source into said combustion chamber, and a secondary fuel delivery means including a fuel pump adapted to be connected to a source of fuel, a fuel return line adapted for communication with the source of fuel, and means for selectively communicating said fuel pump with said fuel return line and with said fuel port independently of said primary fuel delivery means, said means for selectively communicating said fuel pump with said fuel return line and with said fuel port including means operative independently of said fuel pump for pumping fuel to said fuel port.
An engine comprising a combustion chamber having a fuel port, primary fuel delivery means adapted for connection to a source of fuel and communicating with said combustion chamber for introducing fuel from the fuel source into said combustion chamber, and a secondary fuel delivery means including a fuel pump adapted to be connected to a source of fuel, a fuel return line adapted for communication with the source of fuel, and means for selectively communicating said fuel pump with said fuel return line and with said fuel port independently of said primary fuel delivery means, said means for selectively communicating said fuel pump with said fuel return line and with said fuel port including a fuel supply line including an inlet end portion communicating with said fuel pump, and an outlet end portion communicating with said fuel pump, and a midportion between said fuel supply line inlet and outlet end portions and communicable with said fuel return line, and valve means movable in said fuel supply line for selectively communicating said inlet and outlet end portions of said fuel supply line and said inlet end portion of said fuel supply line and said fuel return line.
An engine comprising a combustion chamber, wall means for defining a fuel transfer passage having a fuel outlet port communicating with said combustion chamber, primary fuel delivery means adapted for connection to a source of fuel and communicating with said combustion chamber for introducing fuel from the fuel source into said combustion chamber, a fuel pump adapted to be connected with a source of fuel, a fuel return line having a first end adapted for communicating with the source, and a second end spaced from said first end, and means for selectively controlling the communication of said fuel pump with said fuel return line and said fuel transfer passage and comprising a fuel supply line including an inlet end portion communicating with said fuel pump, and outlet end portion communicating with said fuel transfer passage, and a midportion between said fuel supply line inlet and outlet end portions and communicable with said second end of said fuel return line, and valve means movable in said fuel supply line for selectively controlling the communication between said inlet and outlet end portions of said fuel supply line and between said inlet end portion of said fuel supply line and said second end of said fuel return line, said valve means including means operative independently of said fuel pump for pumping fuel from said inlet end portion of said fuel supply line through said outlet end portion thereof and into said fuel transfer passage in response to sequential movement of said valve means in said fuel supply line.
Dependencies are inferred from the claim text.