Method for producing at least one ash-forming means for a particulate filter of an exhaust gas system of a gasoline engine

Patent metadata

Field	Value
Publication number	US-10828591-B2
Application number	US-201916441046-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Jun 14, 2018
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

A method is provided for producing at least one ash-forming element (1) for a particulate filter of an exhaust gas system of a gasoline engine or diesel engine. The method includes providing of a strip-shaped center layer (3), and making receiving holes (6) in the center layer (3). The method continues by providing of a strip-shaped bottom layer (4), and permanently connecting of the bottom layer (4) to the center layer (3). The method proceeds by filling the receiving holes (6) of the center layer (3) with ash-forming components (2), providing a strip-shaped top layer (5), and permanently connecting the top layer (5) to the center layer (3). The method then includes punching out of at least one ash-forming means (1) from the wafer, and making throughflow openings (7) in regions where there are no ash-forming components (2).

First claim

What is claimed is:

1. A method for producing at least one ash-forming means for a particulate filter of an exhaust gas system of a gasoline engine or diesel engine, the method comprising:
providing a strip-shaped center layer;
making receiving holes in the center layer;
providing a strip-shaped bottom layer;
permanently connecting the bottom layer to the center layer;
filling the receiving holes of the center layer with the ash-forming components;
providing a strip-shaped top layer
permanently connecting the top layer to the center layer to form a wafer;
punching out of at least one ash-forming means from the wafer; and
making throughflow openings in those regions of the ash-forming means in which there are no ash-forming components.

2. The method of claim 1 , wherein the center layer is made from paper or cardboard.

3. The method of claim 2 , wherein the bottom layer is made from paper or cardboard.

4. The method of claim 3 , wherein the top layer is made from paper or cardboard.

5. The method of claim 1 , wherein the bottom layer and the top layer are connected to the center layer by adhesive bonding.

6. The method of claim 1 , wherein the receiving holes are made in the center layer by being punched out.

7. The method of claim 1 , wherein the throughflow openings are made in the at least one ash-forming means by being punched out.

8. The method of claim 7 , wherein the at least one ash-forming means is punched out of the wafer with a contour so that that the ash-forming means can be used as a spacer element between two components of the exhaust gas system that are provided for conducting through exhaust gases.

9. The method of claim 1 , wherein the at least one ash-forming means is punched out of the wafer with an annular or circular contour.

10. The method of claim 1 , wherein a plurality of ash-forming means are punched out of the wafer.

Assignees

• Porsche Ag

Inventors

• Engin Lukas
• Wessels Michael

Classifications

• B01D46/80

  Chemical processes for the removal of the retained particles, e.g. by burning · CPC title

• F01N2330/04

  Methods of manufacturing · CPC title

• F01N2450/28

  by using adhesive material, e.g. cement · CPC title

• F01N3/033

  in combination with other devices {(with adsorbents or absorbents F01N3/0821)} · CPC title

• F01N2330/101

  using binders, e.g. to form a permeable mat, paper or the like · CPC title