Patent ID: 8557009

Claim:
A diesel particulate filter, comprising: a filter body formed of a ceramic material for filtering an exhaust gas stream of a diesel engine, wherein the filter body has gas channels with porous filter segments through which the exhaust gas stream can flow transversely to the face of the filter segments, wherein said filter body of ceramic material comprises at least one ceramic fiber-web sheet superimposed in layers and formed into a desired geometric shape, wherein each of said at least one ceramic fiber-web sheet includes: a combustible, non-ceramic, fiber web substrate sheet, said sheet having two opposing surfaces, a ceramic slip impregnated into the combustible, non-ceramic, fiber web substrate sheet, wherein the filter body is formed by sintering the at least one ceramic-impregnated fiber web sheet under heat in said a firing step such that fibers of the at least one ceramic-impregnated fiber web sheet are burned off and the ceramic material is sintered together to form the continuously porous and gas-permeable filter segment between its two opposing surfaces, wherein at least one fiber web sheet of the at least one ceramic-impregnated fiber web sheet is corrugated to form gas channels, said at least one ceramic-impregnated fiber web sheet arranged in a roll into a plurality of superimposed layers to form the filter body, wherein a cross section of at least a portion of the gas channels changes from an inlet side to a discharge side of said filter body, wherein said sintered filter body is a monolithic ceramic filter body.