Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1975-06-11
1977-08-09
Dority, Jr., Carroll B.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
261 72R, 261DIG67, F02M 508
Patent
active
040403998
ABSTRACT:
Vacuum, created by venturi effect of the throttle valve within the throat of a carburetor of a two cycle outboard motor, in company with a vacuum source orifice positioned opposite a peripheral edge of the throttle valve, is partially applied, by strategic placement of a vacuum source hole, to the fuel float chamber of the carburetor to reduce fuel flow over a selected range of engine RPM; normally when the boat it is driving is cruising on plane. A changeable vent to atmosphere is used to adjust the vacuum level to compensate for altitude changes and to adjust the carburetor to a particular motor. An expansion chamber in the vacuum source line may be required to prevent engine hesitation upon acceleration.
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Argenbright Tony M.
Brunswick Corporation
Dority Jr. Carroll B.
Lloyd Lewis L.
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