Accelerator pump system for carburetors

Details Accelerator pump system for carburetors Accelerator pump system for carburetors

1982-09-30

1984-11-13

Dolinar, Andrew M.

Internal-combustion engines

Starting device

For airplane

261 34A, F02M 114

Patent

active

044819145

ABSTRACT:
An accelerator pump supplies additional fuel into a primary intake passage when a primary throttle valve is opened. A vacuum-operated actuator is responsive to a vacuum developed in a manifold passage upon cranking for actuating an accelerator pump plunger to discharge extra fuel into the primary intake passage. When the engine which is cold is to be started, such an additional supply of fuel assists the engine in getting started quickly. When the engine which is hot is to be restarted, the actuation of the accelerator pump clears away fuel vapor from the accelerator pump and a fuel feed passage connected therewith, thus readying the accelerator pump for normal operation. The primary throttle valve is operatively connected to the accelerator pump through a plate cam having a cam edge which is profiled such that the amount of extra fuel as supplied by the accelerator pump is proportional to opening of the primary throttle valve.

REFERENCES:
patent: 2768818 (1956-10-01), Egerer
patent: 3730495 (1973-05-01), Elam
patent: 3911062 (1975-10-01), Johnson
patent: 3934571 (1976-01-01), Mennesson
patent: 4172864 (1979-10-01), Hohsho et al.
patent: 4194483 (1980-03-01), McChesney et al.
patent: 4272459 (1981-06-01), Berger

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