Fuel primer and enrichment system for an internal combustion engine

摘要

An engine comprises a combustion chamber and a first fuel delivery system which communicates with the combustion chamber and which is adapted for connection with a fuel source. The first fuel delivery system is operative for introducing fuel from the source into the combustion chamber. A second fuel delivery system also communicates with the combustion chamber and is adapted for connection with a fuel source. The second fuel delivery system is operative for introducing fuel from the source into the combustion chamber in addition to the fuel introduced by said first fuel delivery system. The second fuel delivery system includes a fuel pump for pumping fuel through the second fuel delivery system. A control mechanism is movable in the second fuel delivery system for controlling the introduction of fuel into the combustion chamber by the second fuel delivery system during operation of the fuel pump as well as for manually pumping fuel through the second fuel delivery system independent of operation of the fuel pump.