Variable venturi carburetor
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United States of America Patent
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Jul 5, 2011
Grant Date -
Jul 23, 2009
app pub date -
May 12, 2008
filing date -
Jan 21, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A carburetor includes a main body defining a bore, a main passage and a venturi defined within the bore, and a fuel nozzle carried by the main body and including a fuel nozzle outlet communicating with the venturi. The carburetor may also include a valve member translatable across an axis of the bore, such that in a closed state, the valve member closes the main passage but maintains the venturi at least partially open. The carburetor may also include a needle valve disposed at an end of the fuel nozzle substantially opposite of the fuel nozzle outlet to variably control flow of fuel into a fuel nozzle inlet, and a needle valve transmission may be coupled between a throttle shaft and the needle valve to convert rotation of the throttle shaft to translation of the needle valve.
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