Exhaust management system control

Details Exhaust management system control Exhaust management system control

1997-07-22

1999-06-08

Tran, Hien

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232132, 422171, 422177, 422178, 422108, 60274, 60295, F01N 310

Patent

active

059102934

ABSTRACT:
An exhaust management control method comprising the steps of: immediately following a cold start of an engine, adsorbing hydrocarbons from engine exhaust into a hydrocarbon adsorber; determining when a catalytic converter catalyst light-off is obtained and thereafter purging the adsorber, wherein a first regeneration of the adsorber is obtained; detecting an engine off condition of the vehicle; and injecting air through the adsorber following the detected engine off condition while the adsorber is hot enough that coke deposits thereon are oxidized and thereby removed from the adsorber, wherein a second regeneration of the adsorber is achieved.

REFERENCES:
patent: 5447694 (1995-09-01), Sawroop et al.
patent: 5510086 (1996-04-01), Hemingway et al.
patent: 5587137 (1996-12-01), Swaroop et al.
patent: 5662869 (1997-09-01), Abe et al.

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