Patent · US Active

Ceramic filter element and method of manufacture

US8557009B2 · kind B2 · utility

2Cited by

8References

9Claims

0Family size

Assignee

MANN+HUMMEL GmbH · DE

Inventors

Karin Gerlach · Eningen unter Achalm, DE
Stefan Tudyka · Ludwigsburg, DE
Jochen Linhart · Waiblingen, DE
Andreas Franz · Ludwigsburg, DE

Key dates

Filing date	Feb 24, 2011
Grant date	Oct 15, 2013
Priority date	—
Expiry date	Sep 7, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49083
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method of manufacturing a ceramic diesel particle filter (DPF) and a DPF manufactured by the method, the DPF having a ceramic filter body (1) including gas channels (18, 18′) with planar and porous filter segments (3), which are provided for the exhaust gas stream (2) to flow through them transversely to the face of the filter segments (3). The filter body (1) is formed by sintering at least one ceramic-impregnated fiber web (4) in a firing step under heat such that fibers (5) of the fiber material are burned off and the ceramic material (6) is sintered together to form the porous filter segment (3) between its two surfaces (7, 8). At least one fiber web (4) is corrugated to form the gas channels (18, 18′) and rolled up to form the filter body (1), and the cross section of at least a portion of the gas channels (18, 18′) changes from an inlet end (33) to a discharge end (34).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.