Air-fuel ratio control device of an internal combustion engine

Details Air-fuel ratio control device of an internal combustion engine Air-fuel ratio control device of an internal combustion engine

1988-04-06

1989-06-27

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123489, 123416, F02M 2508, F02M 5100

Patent

active

048419400

ABSTRACT:
An air-fuel ratio control device comprising an electric air bleed control valve which controls the amount of air fed into the fuel passage of the carburetor so that an air-fuel ratio becomes equal to the stoichiometric air-fuel ratio. The degree of opening of the air bleed control valve is increased as an electric current fed into the air bleed control valve is increased. Fuel vapor is fed into the intake passage from the canister. When the electric current fed into the air bleed control valve is increased and reaches a predetermined upper limit due to the supply of purge gas, the current fed into the air bleed control valve is instantaneously increased by a fixed amount.

REFERENCES:
patent: 3680318 (1972-08-01), Nakajima et al.
patent: 3872848 (1975-03-01), King
patent: 4748959 (1988-06-01), Cook et al.
patent: 4771752 (1988-09-01), Nishimura et al.

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