Air-fuel ratio control device of a variable venturi-type carbure

Details Air-fuel ratio control device of a variable venturi-type carbure Air-fuel ratio control device of a variable venturi-type carbure

1982-08-04

1984-07-03

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Auxiliary control of carburetor fuel metering

261 44C, F02B 3300

Patent

active

044572794

ABSTRACT:
A variable venturi-type carburetor comprising a main fuel passage which is open to the intake passage of the carburetor. An air bleed passage is connected to the main fuel passage. The inlet of the air bleed passage is divided into a first passage and a second passage. A first control valve and a first jet are arranged in the first passage. A second control valve and a second jet are arranged in the second passage. The second jet has a flow area which is larger than that of the first jet. The first control valve opens the first passage only when the engine is operating under an idling state. The second control valve opens the second passage only during the cruising operation of a vehicle.

REFERENCES:
patent: 3906910 (1975-09-01), Szlaga
patent: 4039638 (1977-08-01), Hill
patent: 4085716 (1978-04-01), Minami
patent: 4091781 (1978-05-01), Mituyasu
patent: 4100234 (1978-07-01), Lindberg
patent: 4111170 (1978-09-01), Nakajima
patent: 4173956 (1979-11-01), Ikeura
patent: 4314535 (1982-02-01), Takeuchi
patent: 4369749 (1983-01-01), Sugi

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