Variable venturi-type carburetor
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United States of America Patent
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-
Oct 16, 1984
Grant Date -
N/A
app pub date -
Aug 17, 1982
filing date -
Dec 21, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable venturi-type carburetor comprising a vacuum chamber and an atmospheric pressure chamber which are separated by a suction piston. A needle is mounted on the central portion of the tip face of the suction piston. A suction hole, interconnecting the vacuum chamber to a venturi portion of the carburetor, is formed on the tip face of the suction piston at a position located upstream of the needle. The vacuum chamber is open to the atmosphere via a flow rate control valve apparatus when the engine temperature is low. The vacuum chamber is disconnected from the atmosphere by the flow rate control valve apparatus when the engine temperature is high.
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