| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotor internal configuration of a 2-bore rotary carburetor for a stratified-scavenging engine stabilizing the engine of a power saw, a lawnmower or the like in idling and all position changing. SOLUTION: A fuel supply side bore 8 of a carburetor rotor valve 6 is formed with groove pockets 10 communicating with the fuel supply side bore 8 respectively in opening edges of an upstream end and a downstream end on a side of accelerating rotation direction of the rotor valve 6. The groove pocket 10 is in a shape of gradually turning upward to the side of accelerating rotation direction along a peripheral surface of the rotor valve 6 and decreasing in cross sectional area. The construction is therefore such that in horizontal rotation of the rotor valve 6, the groove pockets 10 first lap over a mix passage, the fuel supply side bore 8 and the mix passage are brought into communication and the fuel supply side bore 8 is opened before an air supply side bore 7. COPYRIGHT: (C)2008,JPO&INPIT
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