Patent ID: 9149801
Filing Date: 2015-10-06
Classification: B01D,B01J,Y02A,Y02T

Abstract:
1. A system comprising: an engine that generates an exhaust stream during operation; an exhaust gas aftertreatment system coupled to and in fluid communication with the engine, the exhaust gas aftertreatment system including a selective catalytic reduction filter configured to catalytically convert constituents in the exhaust stream into inert byproducts and to filter particulate matter from the exhaust stream; a first pressure sensor disposed at an inlet side of the selective catalytic reduction filter between the selective catalytic reduction filter and the engine; a second pressure sensor disposed at an outlet side of the selective catalytic reduction filter; a differential pressure module in communication with the first pressure sensor and the second pressure sensor and configured to generate a delta pressure signal corresponding to an exhaust gas pressure drop between the first pressure sensor and the second pressure sensor; and a controller in communication with each of the engine, the first pressure sensor, the second pressure sensor, the differential pressure module, and the selective catalytic reduction filter, the controller having a processor and a memory on which is recorded instructions, wherein executing the recorded instructions causes the processor to: