Marine propulsion device including a fuel injected, four-cycle internal combustion engine

An internal combustion engine comprising an engine block including a combustion chamber, a fuel vapor separator, means for supplying fuel to said fuel vapor separator, fuel supply means for introducing fuel to said combustion chamber from said fuel vapor separator, and means for venting fuel vapor from said fuel vapor separator during engine start-up and for preventing venting of fuel vapor from said fuel vapor separator during engine operation subsequent to engine start-up.

A fuel feed system for an internal combustion engine, said system comprising a fuel vapor separator adapted to contain a fuel supply, high-pressure fuel supply means for introducing fuel from said fuel vapor separator to the engine, low-pressure fuel supply means for supplying fuel from a fuel tank to said fuel vapor separator, and means responsive to conditions in said fuel vapor separator for controlling said high-pressure fuel supply means and said low-pressure fuel supply means.

A fuel feed system for an internal combustion engine, said system comprising an engine block including a combustion chamber, a fuel vapor separator including a reservoir portion adapted to contain a fuel supply, means for supplying fuel to said reservoir portion, fuel supply means for introducing fuel to said combustion chamber from said reservoir portion, and means for pressurizing and cooling the fuel supply in said reservoir portion.

An internal combustion engine comprising an engine block including a combustion chamber, fuel injector means for supplying fuel to said combustion chamber, said fuel injector means including a fuel vapor separator, an air intake manifold defining an air intake plenum housing said fuel injector means, and means for draining said plenum into said combustion chamber.

An internal combustion engine comprising an engine block including a combustion chamber, fuel injector means for supplying fuel to said combustion chamber, a fuel pump, an air intake manifold defining an air intake plenum including therein said fuel pump and said fuel injector means, and means for draining said plenum into said combustion chamber.

An internal combustion engine comprising an engine block including a combustion chamber, a fuel vapor separator, means for introducing fuel to the combustion chamber, conduit means communicating between said fuel vapor separator and said means for introducing fuel, and means for cooling said fuel vapor separator.

An internal combustion engine comprising an engine block, a wall extending outwardly therefrom and defining a compartment, a fuel tank, a fuel vapor separator housed in said compartment and communicating with said tank, means for pumping fuel from said tank to said fuel vapor separator, fuel injector means adapted for supplying fuel to a combustion chamber provided in said engine block and being housed in said compartment, means for pumping fuel from said fuel vapor separator to said fuel injector means, said means for pumping fuel to said fuel injector means being housed in said compartment, and means for conducting fuel from said fuel injecting means to said fuel vapor separator.

An internal combustion engine comprising an engine block including a combustion chamber, an intake manifold supported by said block, and fuel feed means for supplying fuel to said combustion chamber and including a fuel pump, and as fuel vapor separator communicating with said fuel pump and housed in said intake manifold.

A fuel feed system for an internal combustion engine, said fuel feed system comprising a fuel vapor separator including a reservoir portion and a cover portion releasably fixed to said reservoir portion, means for injecting fuel to the engine, pump means mounted on said cover portion of said fuel vapor separator, and conduit means communicating between said fuel vapor separator and said means for injecting fuel and including a first conduit communicating between said pump means and said fuel vapor separator, and a second conduit communicating between pump means and said means for injecting fuel.

An internal combustion engine comprising an engine block defining a cylinder, a crankcase, air intake means communicating with said cylinder, a water jacket between said air intake means and said crankcase, and a fuel vapor separator in heat exchanging relation to said water jacket.

A fuel vapor separator including a housing defining a fuel reservoir, a fuel inlet communicating with said fuel reservoir, a fuel outlet communicating with said fuel reservoir, a fuel vapor outlet communicating with said reservoir, and a coolant jacket in heat exchanging relation to said housing.

An air inlet manifold including wall means defining an air inlet passage, defining a cooling jacket, defining a fuel vapor separator including a fuel reservoir, and defining a wall between said fuel reservoir and said coolant jacket.