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US 2013/0152530 A1Published application
Filtering device, in particular diesel particulate filter
AssigneeMann+Hummel GmbH
InventorsArndt-Udo Rolle, Frank Ehlen, Kathrin Lichtenwalter, Jochen Linhart, Nadine Dietsch
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Abstract
A filtering device features a ceramic filter body for filtering a fluid flow, the filter body consisting of a wavy layer and a flat layer and the wavy and flat layer being wound in a spiral-shaped manner. The wave length of the waves increases from the inside to the outside with increasing distance to the longitudinal axis of the filter body such that the wave troughs and the wave peaks of at least two radially adjacent windings each lie on a common radial plane.
Claims11
A diesel particulate filter, comprising:
- a ceramic spirally wound filter body for filtering a fluid flow, the ceramic filter body including
- a wavy layer of filter material having a porosity and forming wave troughs and wave peaks;
- and
- a flat layer of filter material having a porosity;
- and
- wherein the wavy layer and the flat layer are overlaid onto each other and spirally wound so that waves of the wave troughs and or peaks of the wavy layer form flow channels on the side facing the flat layer and/or facing away from it;
- wherein the wavy length in the wavy layer increases from the inside to the outside with increasing distance to the longitudinal axis of the filter body in such a way that the wave troughs and wave peaks of at least radially adjacent windings lie each on a common radial plane.
4 more elements
Dependencies are inferred from the claim text.