Membrane carburetor

Details Membrane carburetor Membrane carburetor

1995-03-20

1996-08-06

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

261 341, F02D 4100

Patent

active

055424058

ABSTRACT:
The invention relates to a membrane carburetor for an engine of a motor-driven chain saw. The membrane carburetor has a fuel-filled control chamber delimited by a control membrane. A throttle flap is mounted in an intake channel and a main nozzle opens into the intake channel upstream of the throttle flap. The main nozzle opening is connected to the control chamber via a fuel channel and a fixed nozzle limiting the inflowing fuel-mass flow. In order to make the mixture composition controllable, an air-supply channel opens into the fuel channel and a control valve is mounted in the air-supply channel. The control valve can be adjusted by a positioning device in dependence upon engine operating data. The positioning device is actuated by a control apparatus.

REFERENCES:
patent: 3900014 (1975-08-01), Bundesen et al.
patent: 3974813 (1976-08-01), Knapp et al.
patent: 4083338 (1978-04-01), Bertling et al.
patent: 4084562 (1978-04-01), Eckert
patent: 4089311 (1978-05-01), Bretteschneider
patent: 4091781 (1978-05-01), Mituyasu et al.
patent: 4308835 (1992-01-01), Abbey

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