Patent ID: 7263824
Filing Date: 2007-09-04
Classification: F01N,Y02T

Abstract:
1. An exhaust gas aftertreatment device for an internal combustion engine, the device comprising: an inlet configured to receive the exhaust gas, an outlet from which the exhaust gas exits the device, a first passageway defined between the inlet and the outlet, a first aftertreatment element disposed in the first passageway, the first aftertreatment element defining a peak conversion efficiency in a first range of exhaust gas temperatures, a second passageway defined between the inlet and the outlet and separated from the first passageway, a second aftertreatment element disposed in the second passageway, the second aftertreatment element defining a peak conversion efficiency in a second range of exhaust gas temperatures different than the first range, and an exhaust gas flow control mechanism configured to selectively control exhaust gas flow through the first and second passageways.