Diaphragm-controlled carburetor with manual fuel enrichment

Details Diaphragm-controlled carburetor with manual fuel enrichment Diaphragm-controlled carburetor with manual fuel enrichment

1988-07-21

1989-03-21

Miles, Tim

Gas and liquid contact apparatus

Fluid distribution

Pumping

261DIG8, 261DIG68, F02M 1704

Patent

active

048141143

ABSTRACT:
A diaphragm-controlled carburetor which includes a diaphragm positioned in a chamber and dividing the chamber into wet and dry chamber sides. A valve is positioned in the wet chamber side, and is responsive to the diaphragm for feeding fuel to fuel jets and thence to a fuel/air passage. The dry chamber side is connected to receive pressure pulses from the engine crankcase through a three-position valve. The valve has orifices selectively interconnected by a rotatable valve disc for feeding pulses at first intensity to provide an enriched fuel/air mixture for starting, at a second lesser intensity to provide a less enriched fuel-air mixture for engine warm-up, and to block pressure pulses from the dry side of the control diaphragm.

REFERENCES:
patent: 3265050 (1966-08-01), Tuckey
patent: 3441010 (1969-04-01), Barr et al.
patent: 3743253 (1973-07-01), Tuckey et al.
patent: 4159012 (1979-06-01), Pizzuto et al.
patent: 4455266 (1984-06-01), Gerhardy

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