Patent ID: 7143999

Claim:
An accelerating apparatus of a carburetor sectioned into a pump chamber and a pressure receiving chamber by a partition body, the pump chamber being structured such that an acceleration fuel intake path provided with an intake side check valve in an inner portion and connected to a portion below a fixed liquid surface of a float chamber and an acceleration fuel discharge path provided with a discharge side check valve in an inner portion and connected to an intake passage in an upstream side from a venturi portion via an accelerating nozzle are arranged so as to be open in the pump chamber; and the pressure receiving chamber being provided with a negative pressure actuating accelerating apparatus, in which a negative pressure introducing path connected to an intake passage in a downstream side from a throttle valve is arranged so as to be open therein, and a solenoid apparatus having a valve body which opens an opening portion of a main fuel jet below the fixed liquid surface within the float chamber at the time of engine operation, and closes the opening portion at the time of engine stop, wherein a fuel discharge path ( 30 b ) connected to the inside of the float chamber ( 8 ) is arranged to be open in said pump chamber, and a jet opening and closing valve portion ( 34 a ) opening and closing the opening portion ( 6 a ) of the main fuel jet ( 6 ), and a discharge passage opening and closing valve portion ( 34 b ) opening and closing the fuel discharge passage ( 30 b ) are formed in the valve body ( 34 ) of said solenoid apparatus, wherein, when the engine is operated, the solenoid apparatus (S) opens the opening portion ( 6 a ) of the main fuel jet ( 6 ) by the jet opening and closing valve portion ( 34 a ) and closes and so keeps the fuel discharge path ( 30 b ) by the discharge path opening and closing valve portion ( 34 b ), and wherein, when the engine stops, the solenoid apparatus (S) closes the opening portion ( 6 a ) of the main fuel jet ( 6 ) by the jet opening and closing valve portion ( 34 a ) and opens and so keeps the fuel discharge path ( 30 b ) by the discharge path opening and closing valve portion ( 34 b ).