초록 ▼

A fuel shut off solenoid device of a carburetor has a solenoid chamber which typically fills with fuel. When the solenoid device is energized, fuel flows from a fuel chamber into a mixing passage of the carburetor to mix with air. During the energized state, heat from the solenoid tends to vaporize

A fuel shut off solenoid device of a carburetor has a solenoid chamber which typically fills with fuel. When the solenoid device is energized, fuel flows from a fuel chamber into a mixing passage of the carburetor to mix with air. During the energized state, heat from the solenoid tends to vaporize the fuel within the solenoid chamber. Also when energized, the solenoid device is held in a retracted position whereby a head at a distal end of the shaft mates with or seals to a washer which in turn seals to an upward face of the encasement of the fuel shut off solenoid device. Thus the potential migration of large vapor bubbles from the solenoid chamber to the mixing passage of the carburetor is eliminated, providing a smoother idling or running engine at light loads.

대표청구항 ▼

1. A fuel shut-off solenoid device for a carburetor, the solenoid device comprising:an encasement having an outward face and an inner brim; a solenoid chamber defined by the encasement below the outward face; a shaft disposed within the solenoid chamber and extending through the outward face radiall

1. A fuel shut-off solenoid device for a carburetor, the solenoid device comprising:an encasement having an outward face and an inner brim; a solenoid chamber defined by the encasement below the outward face; a shaft disposed within the solenoid chamber and extending through the outward face radially inward of the inner brim, the shaft having a head at a distal end and disposed outward from the outward face of the encasement, the head having a trailing face, a peripheral edge and an inner perimeter edge, the trailing face defined between the peripheral edge and the inner perimeter edge, the trailing face opposing the outward face of the encasement, and the peripheral edge larger than the inner brim of the outward face; an electrical coil aligned axially with the solenoid chamber, the electrical coil encapsulated by the encasement and isolated from the solenoid chamber, the shaft capable of movement between an extended position and a retracted position upon energizing the coil; and a clearance defined radially between the shaft and the inner brim of the encasement, the clearance communicating with the solenoid chamber wherein fuel migrates into the solenoid chamber through the clearance when the shaft is in the extended position, the trailing face of the head of the shaft sealing with the outward face of the encasement when the shaft is in the retracted position.