Carburetor equipped with needle jet

Details Carburetor equipped with needle jet Carburetor equipped with needle jet

2007-04-20

2009-12-29

Chiesa, Richard L (Department: 1797)

Gas and liquid contact apparatus

Fluid distribution

Valved

C261S050100, C261S051000, C261S059000, C261S060000, C261SDIG038

Reexamination Certificate

active

07637483

ABSTRACT:
A carburetor includes a valve mechanism, and a needle jet extending in an up and down direction. Also included is a jet needle provided to a sliding throttle valve disposed in an air intake tube and inserted into the jet needle. The valve mechanism includes a valve body, which has a plate shape and which is moved by the flow of the fuel. When a motorcycle lands on the ground after the motorcycle jumps while running, the fuel-in-jet, that is, the fuel in the needle jet, tends to accelerate downwardly. The valve mechanism prevents a downward reverse flow of the fuel-in-jet on which such downward acceleration acts. The resulting configuration prevents temporary production of a lean air-fuel mixture, which may possibly be produced when the fuel in the needle jet has accelerated downwardly.

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