STARTING CIRCUIT FOR FUEL SYSTEM

摘要

PROBLEM TO BE SOLVED: To actualize a fuel system for starting and purging, which removes old liquid fuel, residing fuel vapor and air from a diaphragm carburetor of an engine while starting the carburetor and/or the engine with the liquid fuel.

SOLUTION: A starting pump for the fuel system supplies at least the liquid fuel to a starting circuit, preferably supplies at least the liquid fuel and air to a purge circuit for the fuel system. The starting circuit supplies starting fuel to the engine through a conduit connected to an isolated chamber 50 located between an intake nozzle and an exhaust nozzle. The sectional flow range of each nozzle is large enough for the amount of liquid fuel required for starting the engine without flooding it with fuel to flow to the engine. The expanded isolated chamber 50 and the nozzles are combined to prevent the drip of the fuel in a way from the starting circuit to the engine during the normal operation of the engine.

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