DE102009008296A1 - Method for producing a ceramic filter element and filter element - Google Patents

Abstract

A method for producing a ceramic filter element in an exhaust gas filter for internal combustion engines, in particular a diesel particulate filter, in which a combustible, non-ceramic carrier web is used, is presented. Holes are introduced into the non-ceramic carrier web in a defined position.

Description

Technical area

The The invention relates to a method for producing a ceramic Filter element in an exhaust filter of an internal combustion engine. In particular, it concerns the invention a diesel particulate filter.

State of the art

In Patent Abstracts of Japan JP 63134020 A a ceramic filter element is described for an exhaust filter in an internal combustion engine, which is constructed of a corrugated, spirally wound filter web. To produce the filter web, heat-resistant, inorganic fibers are mixed with ceramic powder in an aqueous suspension and processed to form a web. Several superimposed webs are rolled up to the desired shape of the filter body, wherein honeycomb flow channels are formed between adjacent filter webs. The filter body is then fired at high temperature.

The WO 2006/005668 discloses a method of manufacturing a ceramic filter element in an exhaust gas filter for internal combustion engines. Here, a combustible, non-ceramic carrier web is first soaked with a ceramic slurry and then burned out in the gewünsch th geometric shape until the carrier web is burned and a rigid filter body is formed.

adversely At this procedure is that no purposeful cavities can be introduced into the component to be produced.

It there is a need, therefore, to provide ceramic filter elements, avoid the disadvantages of the prior art.

Disclosure of the invention

It is therefore the object of the present invention, a method for producing a ceramic filter element in an exhaust gas filter to provide an internal combustion engine that allows targeted To introduce cavities in the filter element.

These and other tasks are performed by the method of manufacture a ceramic filter element according to claim 1 and the filter element according to Claim 2 solved.

Embodiment (s) of the invention

at a diesel particulate filter may result in the need to that partial parts of the entire component to be separated or later z. B. in the exhaust system influence the flow should be taken.

• 1) Einbringen der Löcher bzw. Schnitte mit einem Messer oder einem Dorn auf der Papierbahn vor oder nach dem Falten oder nach dem Tränken.
• 2) Auftragen von Tinte bzw. Flüssigkeit mit einem Drucker oder einer Düse an den Stellen, an denen sich die Löcher/Schnitte später auf der Papierbahn befinden sollen. Dies kann vor oder nach dem Falten durchgeführt werden. Versuche haben gezeigt, dass an den Stellen, die mit Tinte bzw. Flüssigkeit aus einem Tintenstrahldrucker getränkt wurden, eine schlechte bis keine Anlagerung von Keramikschlicker erfolgte, so dass sich dort nach dem Sintern keine Keramik befand.

According to the invention this is achieved in that during the production of the filter element targeted holes and / or cuts are introduced into the component. Two options are proposed for this:

• 1) introducing the holes or cuts with a knife or a mandrel on the paper web before or after folding or after soaking.
• 2) apply ink or liquid to a printer or a nozzle where the holes / cuts should later be on the paper web. This can be done before or after folding. Experiments have shown that at the points that were soaked with ink or liquid from an inkjet printer, there was a bad to no deposition of ceramic slip, so there was no ceramic after sintering.

One Advantage of the method lies For example, in that for separating parts of the device no Sawing must be used as a perforation is generated at which the parts can be selectively separated.

One Another advantage is the fact that for the introduction of holes / cuts no drilling is necessary.

On this way holes can be defined in Position introduced in the flow channel of a diesel particulate filter become. In addition, the inventive allows Method of introducing holes in otherwise inaccessible Put.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - JP 63134020 A [0002]
• WO 2006/005668 [0003]

Claims (2)

Method for producing a ceramic filter element in an exhaust gas filter for internal combustion engines, in particular a diesel particulate filter, in which a combustible, non-ceramic carrier web is used, characterized in that holes are introduced into the non-ceramic carrier web in a defined position. Ceramic filter element, in particular diesel particle filter, with flow channels, characterized that the flow channels holes in a defined position exhibit.