Secondary air feed device of an engine

Details Secondary air feed device of an engine Secondary air feed device of an engine

1992-07-23

1993-08-17

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

60289, F02B 2300

Patent

active

052359565

ABSTRACT:
A secondary air feeding device comprising an air pump for feeding secondary air into the exhaust passage upstream of the three way catalytic converter. The air-fuel ratio is normally maintained at the stoichiometric air-fuel ratio by a feedback control. When the amount of fuel is to be increased, the feedback control is stopped, and the supply of secondary air is started. At this time, the amount of secondary air is basically calculated from the amount of fuel fed into the engine.

REFERENCES:
patent: 5024201 (1991-06-01), Kobayashi et al.
patent: 5043899 (1991-08-01), Okada et al.
patent: 5113651 (1992-05-01), Kotzan et al.
patent: 5119631 (1992-06-01), Kayanuma et al.
patent: 5148788 (1992-09-01), Saikalis et al.
patent: 5152137 (1992-10-01), Nishizawa
patent: 5157920 (1992-10-01), Nakaniwa
patent: 5168706 (1992-12-01), Kawamura

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