Engine secondary air flow control system

Details Engine secondary air flow control system Engine secondary air flow control system

1975-10-03

1976-11-23

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Material from exhaust structure fed to engine intake

60290, 123119A, F02B 7510

Patent

active

039928780

ABSTRACT:
An engine has an air injection system injecting air into the exhaust system to reduce emissions. The injection is scheduled by a bypass valve that normally permits injection, but bypasses or dumps the air as a function of a carburetor ported vacuum signal that is also used to control exhaust gas recirculation. A control is provided to maintain air injection for a short period during certain engine idle conditions, but dumping of the air after this period. An engine deceleration override is provided to dump the air when this condition exists, to prevent backfire. A cold engine vacuum lock-out also is provided.

REFERENCES:
patent: 3828746 (1974-08-01), Martelaere
patent: 3888080 (1975-06-01), Nohira
patent: 3905193 (1975-09-01), Heilman
patent: 3906723 (1975-09-01), Matumoto

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