Car exhaust gas purification device controlling circuit

Details Car exhaust gas purification device controlling circuit Car exhaust gas purification device controlling circuit

1977-01-04

1979-04-24

Feinberg, Samuel

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

60276, F02M 724

Patent

active

041506430

ABSTRACT:
A car exhaust gas purification device controlling circuit wherein a deviation between an output of an exhaust gas sensor and a set value is converted into a time-width signal and a proportional electromagnetic valve is controlled by an integrated output of the time-width signal to control the air-fuel ratio around a theoretical air-fuel ratio, whereby an offset of air-fuel ratio due to hysteresis of such as the proportional electromagnetic valve used for controlling the air-fuel ratio is eliminated.

REFERENCES:
patent: 3998189 (1976-12-01), Aoki
patent: 4019474 (1977-04-01), Nishimiya et al.
patent: 4022171 (1977-05-01), Laprade et al.

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