Carburetor fuel bowl vent valve assembly

Details Carburetor fuel bowl vent valve assembly Carburetor fuel bowl vent valve assembly

1982-06-04

1984-06-26

Myhre, Charles J.

Valves and valve actuation

Heat or buoyancy motor actuated

251DIG1, 123516, 261DIG67, F02M 508

Patent

active

044562160

ABSTRACT:
A carburetor fuel bowl vent valve assembly consists of a one-piece plastic housing having a central partition with a central well defining a zigzag shaped path for the flow of fuel vapors from the carburetor fuel bowl to a carbon canister. The well contains a vacuum operated vent valve that is spring opened during engine-off operation to allow the storage of fuel vapors under engine hot soak conditions, and is closed by engine manifold vacuum during engine running operation so that the fuel vapors will be rerouted into the engine. The vent valve further includes thermally responsive means to close the vent valve during low ambient temperature conditions. It also includes seal locating means that retain the seal in position without stretching or deforming it.

REFERENCES:
patent: Re30552 (1981-03-01), Ludwig
patent: 2917110 (1959-12-01), Brohz
patent: 3400906 (1968-09-01), Stocklin
patent: 3847178 (1974-12-01), Keppel
patent: 4092994 (1978-06-01), McGowan
patent: 4283356 (1981-08-01), Arai
patent: 4377146 (1983-03-01), Oniki

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