Diaphragm carburetor for an internal combustion engine with a ma

Details Diaphragm carburetor for an internal combustion engine with a ma Diaphragm carburetor for an internal combustion engine with a ma

1998-08-27

2000-10-24

Chiesa, Richard L.

Gas and liquid contact apparatus

Fluid distribution

Pumping

261 63, F02M 712

Patent

active

061354287

ABSTRACT:
A diaphragm carburetor for a combustion engine having a manual starter has a housing and a control chamber arranged in the housing and filled with fuel. A suction channel is arranged in the housing and has a venturi section. A throttle flap is rotatably supported in the suction channel downstream of the venturi section in the flow direction of combustion air sucked into the suction channel. A main valve path connects a control chamber to the venturi section. An idle valve path connects the control chamber to the suction channel and opens into the suction channel at a location downstream of the throttle flap in the flow direction. A choke flap is rotatably supported in the suction channel and positioned upstream of the venturi section. The choke flap has identical cold start and warm start positions and allows a flow volume of combustion air into the suction channel sustaining engine operation after the engine has been started.

REFERENCES:
patent: 1870411 (1932-08-01), Horscroft
patent: 1968553 (1934-07-01), Heitger
patent: 2110211 (1938-03-01), Farrell
patent: 3395899 (1968-08-01), Kopa
patent: 3836128 (1974-09-01), Lunsford
patent: 4158352 (1979-06-01), Blatter
patent: 4769185 (1988-09-01), Nagasaka et al.
patent: 4770823 (1988-09-01), Sejimo
patent: 5200118 (1993-04-01), Hermle
patent: 5215049 (1993-06-01), Wolf
patent: 5992829 (1999-11-01), Andreasson

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