Particulate filter for a motor vehicle

Patent metadata

Field	Value
Publication number	US-9976461-B2
Application number	US-201615155293-A
Country	US
Kind code	B2
Filing date	May 16, 2016
Priority date	Jul 8, 2015
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A particulate filter for a motor vehicle has a casing ( 2 ) that allows through flow. A core ( 4 ) is accommodated in the casing ( 2 ) and allows through flow. The casing ( 2 ) has a longitudinal axis ( 3 ). A through flow duct ( 9 ) is formed between the casing ( 2 ) and the core ( 4 ) to allow the through flow of exhaust gas from an internal combustion engine of the motor vehicle. A ring ( 7 ) is arranged in the through flow duct ( 9 ) and gives the through flow duct ( 9 ) a labyrinth-type configuration.

First claim

What is claimed is:

1. A particulate filter for a motor vehicle, comprising:
a casing having a longitudinal axis and an inner surface allowing through flow through the casing;
a core accommodated in the casing and spaced inward of the inner surface of the casing, the core allowing through flow and being formed from a particulate-absorbing material;
a through flow duct formed in the casing between the inner surface of the casing and the core to allow the through flow of exhaust gas from an internal combustion engine of the motor vehicle; and
at least first and second particulate-absorbing rings arranged in the through flow duct, the first and second rings allowing at least partial through flow therethrough, the first ring being at a first radial position relative to the core and the casing and the second ring being at a second radial position relative to the core and the casing that is different from the first radial position, thereby giving the through flow duct a labyrinth configuration.

2. The particulate filter of claim 1 , wherein an axial first clearance is formed between the first ring and the second ring.

3. The particulate filter of claim 2 , wherein a first radial clearance is formed between the core and the first ring.

4. The particulate filter of claim 3 , wherein a second radial clearance is formed between the inner surface of the casing and the second ring.

5. The particulate filter of claim 1 , further comprising a third particulate-absorbing ring axially adjoining one of the first and second particulate-absorbing rings, with an axial second clearance being formed between the third particulate-absorbing ring and the adjoining one of the first and second particulate-absorbing rings.

6. The particulate filter of claim 1 , wherein the core is produced from a ceramic material or a metal.

7. A particulate filter, comprising:
a casing having a longitudinal axis and an inner surface allowing through flow through the casing;
a core accommodated in the casing and spaced inward of the inner surface of the casing, the core allowing through flow;
a through flow duct formed in the casing between the inner surface of the casing and the core to allow the through flow of exhaust gas from an internal combustion engine of the motor vehicle; and
at least first and second circumferentially continuous rings arranged in the through flow duct, wherein a first outside diameter of the first ring is greater than a second outside diameter of the second ring, a first inside diameter of the first ring is greater than a second inside diameter of the second ring, and the first inside diameter is less than the second outside diameter, thereby giving the through flow duct a labyrinth configuration.

8. The particulate filter of claim 7 , wherein the rings allows at least partial through flow.

Assignees

• Porsche Ag

Inventors

• Henseler Lukas

Classifications

• F01N2470/08

  Exhaust gas passages being formed between the walls of an outer shell and an inner chamber · CPC title

• B01D46/4236

  Reducing noise or vibration emissions · CPC title

• F01N3/0335 Primary

  with exhaust silencers in a single housing · CPC title

• F01N1/083

  using transversal baffles defining a tortuous path for the exhaust gases or successively throttling exhaust gas flow · CPC title

• F01N2340/00

  Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the exhaust apparatus; Spatial arrangements of exhaust apparatuses · CPC title