| 摘要 |
PURPOSE:To improve fuel ignitability at the time of cold starting in particular, by feeding fuel in a starting fuel storage chamber to a crankcase of the like of an engine directly with discharge pressure out of a fuel pump at the time of engine starting, while increasing the quantity of starting air. 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. And, a fuel chamber 22 of the fuel tank T and a fuel inlet H of a carburetor body 1 are interconnected to each other by a fuel feed passage 25. In this case, a starting fuel storage chamber K is formed in this fuel feed passage 25 in a pump body 20. And, a starting fuel feed passage 28 is branched off from the starting fuel storage chamber K, and in this starting fuel feed passage 28, there is provided with a normally closed type on-off valve 29 opening or closing this passage 28. With this constitution, at time of starting the engine B, this on-off valve 29 is opened, and fuel inside the starting fuel storage chamber K is directly fed to the inside of a crankcase or the like of the engine B via the starting fuel passage 28.
|
