Starting fuel system for engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorNorihisa Mochizuki
Life of this patent
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Abstract
A motorcycle powered by a two cycle crankcase compression fuel injected internal combustion engine. The injection system for the engine includes a main fuel air/injector that injects fuel directly into the combustion chamber and a second or auxiliary fuel injector that injects fuel into the induction system for the engine. Control means control the fuel injectors so that the second or auxiliary fuel injector supplies fuel only during starting and high load, high speed conditions. The engine components are laid out in such a way that the spark plugs of the engine and the fuel injector will each be exposed to unobstructed air flow for cooling.
Claims25
A fuel injection system for a two cycle crankcase compression engine having an induction system and a combustion chamber to which the induction system delivers a charge, a first fuel injector for injecting fuel directly into said combustion chamber, a second fuel injector for injecting fuel into said induction system, and control means for controlling the operation of said fuel injectors so that only said second fuel injector supplies fuel to said engine during starting.
A method of operating a fuel injection system for a two cycle crankcase compression engine having an induction system and a combustion chamber to which the induction system delivers a charge, a first fuel injector for injecting fuel directly into said combustion chamber, and a second fuel injector for injecting fuel into said induction system, said method comprising the step of controlling the operation of said fuel injectors so that only said second fuel injector supplies fuel to said engine during starting.
Dependencies are inferred from the claim text.