Patent ID: 7749314
Filing Date: 2010-07-06
Classification: B01D,F01N,F02B,F02D,Y02T,Y10S

Abstract:
1. A particulate matter accumulation amount detection apparatus comprising: a filter pressure loss detecting section configured and arranged to detect an upstream-downstream differential pressure of an exhaust gas purification filter having a plurality of substrate walls that filter particulate matter in exhaust gas from an engine to prevent the particulate matter from being discharged into the atmosphere; an incombustible component amount estimating section configured to estimate an amount of an incombustible component included in the exhaust gas; an incombustible component accumulation state estimating section configured to estimate an accumulation distributional state of the incombustible component on the substrate walls of the exhaust gas purification filter that is indicative of a wall surface area coverage of the incombustible component covering the substrate wall based on the engine operating state and the amount of the incombustible component estimated in the incombustible component amount estimating section; and a particulate accumulation amount detecting section configured to detect an amount of the particulate matter accumulated in the exhaust gas purification filter based on the upstream-downstream differential pressure of the exhaust gas purification filter and the accumulation distributional state of the incombustible component on the substrate walls.