Patent ID: 8490383
Filing Date: 2013-07-23
Classification: F01N,Y02T

Abstract:
1. An exhaust system for an internal combustion engine, said exhaust system comprising: a main exhaust duct and a secondary exhaust line operative for exhaust gas to pass therethrough; an oxidation catalyst located inline with said main exhaust duct; a main particulate filter located inline with said main exhaust duct with all of the exhaust gas passing through said main exhaust duct also passing through said main particulate filter; a catalytic monitoring filter located within said secondary exhaust line, said secondary exhaust line and said catalytic monitoring filter located downstream from said main particulate filter, said catalytic monitoring filter being smaller than said main particulate filter; a pressure sensor operative to detect an increase in pressure across said catalytic monitoring filter; and a temperature sensor operative to detect an increase in temperature across said catalytic monitoring filter; said catalytic monitoring filter monitoring said main particulate filter with a detected increase in pressure across said catalytic monitoring filter used to alert at least one of an operator, driver and service person of a failure or potential failure of said main particulate filter; said catalytic monitoring filter also monitoring said oxidation catalyst with a detected increase in temperature across said catalytic monitoring filter used to alert at least one of an operator, driver and service person of a failure or potential failure of said oxidation catalyst.