| 摘要 |
PROBLEM TO BE SOLVED: To automatically open an opening/closing solenoid valve, when an engine is accelerated, so as to supply fuel from an accelerating fuel passage via an accelerating fuel nozzle hole to an intake path. SOLUTION: An accelerating fuel nozzle hole 17a is provided adjacently to a high speed fuel nozzle hole 1 of a venturi part 6 in an intake path 3 of a carburetor. An opening/closing solenoid valve 10 is provided in the halfway of fuel passages 16, 17 leading to the accelerating fuel nozzle hole 17a from a fuel storage tank. The opening/closing solenoid valve 10 is opened by an output when voltage, detected by a rotation sensor 20 arranged to be opposed to a valve shaft 4 supporting a throttle valve 5, exceeds a prescribed value.
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