Secondary air control system for an internal combustion engine

Details Secondary air control system for an internal combustion engine Secondary air control system for an internal combustion engine

1978-08-09

1980-11-04

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 60289, 60306, F01N 315, F01N 310, F02B 7510

Patent

active

042312205

ABSTRACT:
Disclosed is a double feedback loop type of secondary air control system for an internal combustion engine, in which a valve provided in a secondary air feed passage for regulating a quantity of the secondary air fed into an exhaust passage of the engine is operated in response to a first error signal indicative of a deviation of the actual secondary air quantity from the desired secondary air quantity and a second error signal indicative of a deviation of the actual air-fuel ratio from the desired air-fuel ratio, thereby effecting a precise control of the air-fuel ratio.

REFERENCES:
patent: 3696618 (1972-10-01), Boyd
patent: 3730157 (1973-05-01), Gerhold
patent: 3863444 (1975-02-01), Nakajima
patent: 3974651 (1976-08-01), Nakajima
patent: 4110979 (1978-09-01), Miyagi

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