Patent ID: 8122705

Claim:
A catalyst regenerating control method for an exhaust cleaning apparatus of a vehicle comprising: conducting exhaust from a combustion chamber of an internal combustion engine to a main catalytic converter disposed in a main exhaust channel; determining occurrence of a deceleration state in the vehicle; determining establishment of at least one condition for stopping fuel supply to the internal combustion engine during the deceleration state of the vehicle; performing a fuel cutting operation upon the determining of the establishment of the condition for stopping fuel supply to the internal combustion engine; and switching a main-channel blocking device from an open state to a closed state so that the exhaust discharged from the combustion chamber flows into a bypass exhaust channel disposed upstream from the main catalytic converter, through a bypass catalytic converter disposed in the bypass exhaust channel and then merges again with the main exhaust channel upstream from the main catalytic converter in response to determining one of an elapse of a prescribed period of time after performing the fuel cutting operation, or an air-fuel ratio of the exhaust reaching a stable state after performing the fuel cutting operation.