Patent ID: 7174779
Filing Date: 2007-02-13
Classification: F01N,Y02T

Abstract:
1. A method for aging a catalyzed diesel particulate filter system equipped with a diesel oxidation catalyst and a catalyst-coated filter, comprising the steps of; applying to the catalyst-coated filter almost the same amount of particulate matter emissions as that which has been accumulated until the time to regenerate a filter in an actual vehicle which has been run, followed by the regeneration of the catalyst-coated filter by conducting the post-injection of fuel according to a previously set regeneration logic, determined by loads or rpm values for an engine during the operation of a vehicle and applied to the diesel vehicle, in the course of which changes in the temperature of exhaust gas and in the concentrations of oxygen, hydrocarbons, and carbon monoxide of the exhaust gas, are monitored; setting a standard mode applicable for the regeneration of the filter in the catalyzed diesel particulate filter system on the basis of the data obtained with regard to the temperature distribution, oxygen concentration, and gas concentration of the exhaust gas; subjecting the diesel oxidation catalyst alone to a simulated aging test by mounting only a diesel oxidation catalyst from the catalyzed diesel particulate filter system in an experimental apparatus for an aging test, and controlling the injection time and amount of fuel for post-injection according to the same regeneration logic for a filter set in an actual diesel vehicle; and subjecting the catalyst-coated filter alone to a simulated aging test by mounting only a catalyst-coated filter from the catalyzed diesel particulate filter system in the experimental apparatus for an aging test, and controlling the injection time and fuel amount for post-injection according to the same regeneration logic for a filter set in an actual diesel vehicle.