Patent ID: 8104266
Filing Date: 2012-01-31
Classification: B01D,F01N,Y02T

Abstract:
1. An exhaust purification device of internal combustion engine arranging a catalyst in which SO x contained in an exhaust gas is trapped and stored in an engine exhaust passage, wherein an SO x sensor having a sensor part trapping SO x contained in exhaust gas and able to detect an amount of SO x trapped at the sensor part from a change in a physical property of the sensor part is arranged in the engine exhaust passage upstream of the catalyst, and deviation correcting means for correcting deviation of an estimated value of a stored amount of SO x arising due to a difference in an SO x trapping rate of the sensor part and an SO x trapping rate of the catalyst when estimating the amount of SO x stored in the catalyst from the amount of SO x trapped at the sensor part is provided.