Exhaust gas cleaning device for an internal combustion engine

Details Exhaust gas cleaning device for an internal combustion engine Exhaust gas cleaning device for an internal combustion engine

1993-02-03

1994-05-17

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123695, F02D 4114

Patent

active

053118537

ABSTRACT:
An exhaust gas cleaning device for controlling the air-to-fuel ratio of the air-fuel mixture supplied to an internal combustion engine (1) provided with a catalytic converter (14) disposed in the exhaust pipe (13). The air-to-fuel ratio is oscillated around the central level of the integral control or proportional plus integral feedback control signal based on the output of an air-to-fuel ratio sensor (12); the amplitude of oscillation and the proportional control amount are, or alternatively, the frequency of the oscillation is, varied in accordance with the operating condition of the engine.

REFERENCES:
patent: 4287865 (1981-09-01), Seitz
patent: 4314537 (1982-02-01), Asano et al.
patent: 4402291 (1983-09-01), Aono
patent: 4451793 (1984-05-01), Ohgami et al.
patent: 4512313 (1985-04-01), Tsuchida et al.
patent: 4628884 (1986-12-01), Geering et al.

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