PURPOSE: To supply optimum starting fuel according to engine temperature from an accelerating fuel system by supplying bleed air into the accelerating fuel supply passage of a variable venturi type carburetor through a means for controlling the bleed air quantity according to the engine temperature.
CONSTITUTION: In a carburetor 1 with a variable venturi 3, accelerating fuel discharged by an accelerating pump 23 is supplied from a float chamber 7 to the nozzle 27 of a venturi part 8 through check valves 25, 28. Bleed air is supplied into an accelerating fuel passage 29 through a control valve 31 in which bimetals 43, 44, 45 change openings 50, 51, 52, 53 according to engine temperature. At the time when the engine is started, negative pressure in the venturi sucks the fuel from the float chamber 7, and the bleed air quantity for the said fuel is decreased by the control valve 31 as the engine temperature becomes lower. Therefore a large quantity of the fuel can be supplied.
JPS63189660 | CARBURETOR |
JPS5720547U | 1982-02-02 | |||
JPS523938A | 1977-01-12 |
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