| 摘要 |
A carburetor in which a main-fuel flow rate characteristic and a slow-fuel flow rate characteristic are changeable in accordance with the change of kind of fuel such as between gasoline and alcoholic fuel or the change in the engine operating condition such as atmospheric pressure. The carburetor has a main nozzle opening to an intake passage, a main fuel passage connecting the main nozzle with a float chamber, a slow fuel nozzle opening to the intake passage, a slow fuel passage connecting the slow fuel nozzle with the main fuel passage, and a change-over valve interposed between the main fuel passage and the slow fuel passage. The change-over valve is provided with a plurality of main jet ports of different diameters and a plurality of slow jet ports of different diameters for changing the degree of communications between the main fuel passage and the float chamber, and between the slow fuel passage and the main fuel passage. |
