Variable venturi and zero droop vacuum assist
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United States of America Patent
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Apr 19, 2016
Grant Date -
Oct 24, 2013
app pub date -
Jun 20, 2013
filing date -
Mar 16, 2010
priority date (Note) -
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Abstract
An engine includes a carburetor including a variable venturi having a fixed surface and an adjustable surface that form a constricted section, a throttle valve downstream of the variable venturi, a governor assembly including a governor configured to detect an engine speed of the engine, a governor arm coupled to the governor, the venturi, and the throttle valve, and a governor spring coupled to the governor arm to bias the throttle valve towards the fully open position, and a vacuum actuator including an actuator linkage coupled to the governor spring and also coupled to a pressure-sensitive member for movement with the pressure-sensitive member in response to an engine vacuum, and an actuator spring biasing the actuator linkage to increase the tension on the governor spring.
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