| 摘要 |
PROBLEM TO BE SOLVED: To suppress after burn phenomenon of an engine right after stopping the engine in a vacuum operation type carburetor. SOLUTION: An acceleration device P is divided into a pump chamber 23 and a pressure receiving chamber 24. An acceleration fuel suction path 25 and an acceleration fuel discharge path 28 open in the pump chamber 23 and a fuel discharge path 30b opens toward an inside of a float chamber 8. A vacuum introduction path 30a opens and a pump spring 31 is compressed and provided in the pressure receiving chamber 24. A valve element 34 is formed out of a jet open close valve part 34a opening and closing an opening part 6a of a main fuel jet 6 and a discharge path open close valve part 34b opening and closing the fuel discharge path 30b, and moves synchronously with a movable core 17 of a solenoid device. The opening part 6a of the main fuel jet 6 is opened by the jet open close valve part 34a and the fuel discharge path 30b is shut off by the discharge path open close valve part 34b at a time of operation. The opening part 6a of the main fuel jet 6 is shut off by the jet open close valve part 34a and the fuel discharge path 30b is opened by the discharge path open close valve part 34b at a time of stop. COPYRIGHT: (C)2006,JPO&NCIPI
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