Diesel particulate filters
AssigneeCorning Incorporated
InventorsWillard A. Cutler, David L. Hickman
Life of this patent
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Abstract
A ceramic filter which includes a plurality of end-plugged honeycomb structures which in combination act to trap and combust diesel exhaust particulates. The exhaust gas flows substantially equally through the end-plugged honeycombs. Preferably the ceramic filter includes two end-plugged honeycomb structures composed of a plurality of alternatingly end-plugged cell channels extending from an inlet face to an outlet face. The end-plugged honeycomb structures are arranged either parallel or perpendicular to the flow of the exhaust gas.
Claims7
A diesel exhaust particulate filter apparatus comprising:
- an enclosure provided with an inlet cone and an outlet cone, wherein exhaust gas flows through the inlet cone and out the outlet cone;
- a first end-plugged honeycomb structure positioned adjacent the inlet cone, and a second end-plugged honeycomb structure positioned adjacent the outlet cone,
- wherein the first end-plugged honeycomb structure and the second end-plugged honeycomb structure are parallel to the flow of exhaust gas;
- wherein the first end-plugged honeycomb structure and the second end-plugged honeycomb structure are mounted end-to-end and off-center within the enclosure;
- means for separating the unfiltered exhaust gas entering the filter from the exhaust gas filtered by the first end-plugged honeycomb structure and the second end-plugged honeycomb structure.
An apparatus for purification of diesel exhaust, comprising:
- an enclosure provided with an inlet cone and an outlet cone, wherein exhaust gas flows through the inlet cone and out the outlet cone;
- a couple of end-plugged honeycomb structures centrally positioned within the enclosure and mounted side-by-side, wherein the honeycomb structures have a square cross-section
- means for separating the unfiltered exhaust gas entering the filter from the exhaust gas filtered by the first end-plugged honeycomb structure and the second end-plugged honeycomb structure.
Dependencies are inferred from the claim text.