F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/47
F02M 17/44 (2006.01) F02D 35/00 (2006.01) F02M 7/17 (2006.01) F02M 9/06 (2006.01)
Patent
CA 1083444
AIR VALVE TYPE CARBURETOR Abstract of the Disclosure An air valve type carburetor has a pressure transducer for detecting the pressure in a venturi portion of the carburetor and emitting electric signals corresponding to such pressure. A passage introduces a vacuum from a suction passage supplying air-fuel mixture to an engine downstream of a throttle valve to a suction chamber containing one end of a slidable piston, the other end of which is disposed in the venturi portion of the suction passage. An electromagnetic valve is provided as well as a control unit. The control unit receives electric signals from the pressure transducer, compares these signals with a reference value and emits signals corresponding to the difference. The electromagnetic valve controls the vacuum transmitted to the suction chamber through the passage according to the difference signals from the control unit, so that the pressure in the venturi portion is kept constant. The advantage is that the air-fuel ratio is subject to much less fluctuation than in a conventional carburetor when the position of the throttle value is changed suddenly.
311502
Nakagawa Tohru
Takamaru Takeshi
Hitachi Ltd.
Kirby Eades Gale Baker
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