Patent ID: 9694321
Date: 2017-07-04
CPC Classifications: B01D,F01N

Claim:
1. An exhaust treatment system, comprising: a first particulate filter configured to receive an exhaust stream from an engine and to generate a reduced-particulate exhaust stream, the first particulate filter including a first filter body having an oxidation catalyst, the first filter body including a first inlet side and a first outlet side spaced from the first inlet side, the first filter body defining a first plurality of flow-through channels between the first inlet side and the first outlet side allowing a portion of the exhaust stream to pass through the first filter body relatively unimpeded, and a first plurality of wall-flow channels between the first inlet side and the first outlet side; and a second particulate filter configured to receive the reduced-particulate exhaust stream from the first outlet side of the first particulate filter and filter remaining particulate matter in the reduced-particulate exhaust stream, the second particulate filter including a second filter body that includes a second inlet side and a second outlet side spaced from the second inlet side, the second filter body defining a second plurality of wall-flow channels between the second inlet side and the second outlet side.