| 摘要 |
PURPOSE:To improve fuel ignitability at the time of cold starting in particular, by installing a starting fuel storage chamber and a starting fuel pump combinedly in the side of a carburetor body in order, and at the time of engine starting, feeding fuel inside the starting fuel storage chamber directly to a crankcase or the like of an engine. CONSTITUTION:Fuel in a fuel tank T is fed to a carburetor A which feeds an air-fuel mixture to a two-cycle engine B with pressure by a fuel pump P. In this case, a starting fuel storage chamber 20 is formed in the side of a carburetor body 1 separately from a float chamber 4. The starting fuel storage chamber 20 is interconnected to the float chamber 4 via a warm-up fuel jet 21, and to the atmosphere via a warm-up air jet 22, respectively. In addition, a starting fuel pump R is set up in the side of the starting fuel storage chamber 20, this pump is made up of partitioning the inside of a pump body 30 into a fuel chamber 32 and a pulsating chamber 33 by a partitioner 31 of a diaphragm or the like. And, a starting fuel discharge passage 35 to be opened to this fuel chamber 32 is connected to a crankcase or the like of the engine B via a normally closed type starting on-off valve 38.
|
