Fuel supply control device for an engine

Details Fuel supply control device for an engine Fuel supply control device for an engine

1996-03-27

1998-02-24

Argenbright, Tony M.

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60285, F02D 4108, F01N 320

Patent

active

057201668

ABSTRACT:
An engine is equipped with a mechanism for supplying supplementary air into an exhaust conduit upstream of a catalytic converter in order to increase catalytic activity thereof. An incremental proportion for fuel supply during this supply of supplementary air is determined so as to keep the concentration of oxygen upstream of the catalytic converter substantially at a predetermined value which corresponds to an air/fuel ratio on the lean side of stoichiometric. Further, the amount of fuel supplied is corrected according to the greater of this incremental proportion and an incremental proportion which is determined according to the temperature of the engine. By doing this, the oxygen concentration in the vicinity of the intake of the catalytic converter is maintained at the predetermined value which is lean, and the catalyst is activated at an early stage.

REFERENCES:
patent: 3949551 (1976-04-01), Eichler et al.
patent: 5483946 (1996-01-01), Hamburg et al.
patent: 5584176 (1996-12-01), Meyer et al.

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