Patent ID: 7874145

Claim:
An emission control device for an internal combustion engine, comprising: a fuel control means for controlling fuel supply to cylinders of the internal combustion engine, and an HC adsorption catalytic converter provided in an exhaust passage of the internal combustion engine, said HC adsorption catalytic converter being designed to have an oxygen storage capacity for storing oxygen from exhaust when an oxidizing atmosphere is formed and releasing the stored oxygen when a reducing atmosphere is formed, and to adsorb HC from exhaust in a specific low temperature range and desorb the adsorbed HC above said specific low temperature range, wherein the fuel control means includes a fuel cut means for, when fuel-cut conditions are met, performing fuel cut by stopping fuel supply to all the cylinders of the internal combustion engine, and when recovery-from-fuel-cut conditions are met, terminating the fuel cut and recovering fuel supply to the internal combustion engine, and the fuel control means performs control such that when the HC adsorption catalytic converter is within a specified temperature range above said specific low temperature range, fuel supply quantity is increased with a first increase ratio relative to basic fuel quantity based on the operating state of the internal combustion engine, in a first specified period after the end of the fuel cut, and increased with a second increase ratio smaller than the first increase ratio, in a second specified period succeeding the first specified period.