MECHANISM FOR PREVENTING FASTENING OF CARBURETOR DUE TO RESIDUAL FUEL, AND CARBURETOR AND INTERNAL COMBUSTION ENGINE COMPRISING THE MECHANISM

摘要

PROBLEM TO BE SOLVED: To provide a mechanism capable of preventing a carburetor from being fastened due to residual fuel, and a carburetor or internal combustion engine comprising the mechanism.;SOLUTION: An auxiliary chamber 620 is provided separately from a fuel tank, and can change its volume within a fixed range; the auxiliary chamber 620 and a flat chamber 613 of a carburetor 610 are made communicate with each other; the volume of the auxiliary chamber 620 is increased as needed, so that fuel in the float chamber 613 is suctioned to temporarily save the fuel; the volume of the auxiliary chamber 620 is contracted as needed, so that fuel temporarily saved into the float chamber 613 can be returned; and on condition that a fuel cock 650 for controlling fuel supply from the fuel tank to the carburetor 610 employs a negative pressure system where fuel supply is controlled by negative pressure, the fuel cock 650 and a suction pipe of an internal combustion engine are made communicate with each other through a negative pressure transmission pipe 660.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT