Exhaust gas treatment device with replaceable insert

Patent metadata

Field	Value
Publication number	US-10132226-B2
Application number	US-201615071549-A
Country	US
Kind code	B2
Filing date	Mar 16, 2016
Priority date	May 27, 2015
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

An exhaust gas treatment device ( 1 ), for an exhaust system of an internal combustion engine, includes a tubular housing ( 2 ) and an insert ( 5 ) arranged replaceably in the housing ( 2 ). The insert ( 5 ) has an exhaust gas treatment element ( 7 ) fixed in a tubular jacket ( 6 ) and is able to be pushed into the housing ( 2 ) in a pushing-in direction ( 9 ), which extends parallel to a central longitudinal axis ( 10 ) of the housing ( 2 ). The jacket ( 6 ) has, on an outer side ( 15 ), an axial stop ( 14 ), axially in contact with an axial counterstop ( 18 ) in the pushing-in direction ( 9 ) and is formed on the housing ( 2 ) on an inner side ( 17 ). A locking element ( 19 ) is axially supported on a support contour ( 20 ), is formed on the jacket ( 6 ) in the pushing-in direction ( 9 ), and is provided on the inner side ( 17 ) of the housing.

First claim

What is claimed is:

1. An exhaust gas treatment device for an exhaust system of an internal combustion engine, the exhaust gas treatment device comprising:
a tubular housing;
an insert arranged in the tubular housing, the insert comprising a tubular jacket and at least one exhaust gas treatment element fixed in the tubular jacket, wherein the insert can be pushed into the housing in a pushing-in direction, which pushing-in direction extends parallel to a central longitudinal axis of the housing;
an axial stop on an outer side of the tubular jacket;
an axial counterstop formed on an inner side of the housing, the axial stop being axially in contact with the axial counterstop in the pushing-in direction;
at least one locking element axially supported on a support contour formed on the tubular jacket in the pushing-in direction, the at least one locking element being provided on the inner side of the housing, the at least one locking element fixing the insert in an axial direction with respect to the central longitudinal axis of the housing; and
another locking element to provide a plurality of locking elements, wherein each of the locking elements has a ramp on a locking side interacting with the support contour, each of the locking elements being located at a circumferentially spaced location from another one of the locking elements with respect to the central longitudinal axis,
wherein the locking elements are arranged radially elastically in relation to the inner side of the housing and is in contact with the support contour in a radially prestressed state, so that the ramp locking side introduces an axial prestress into the jacket.

2. A device in accordance with claim 1 , wherein the locking element is configured as a radially elastic locking element that is elastically adjustable between a locked position, in which the locking element interacts with the support contour for axial fixation of the insert in the housing, and an unlocked position, in which the locking element releases the support contour, so that the insert can be extracted from the housing in an extraction direction that is opposite to the pushing-in direction, the jacket comprising a fluid intake end and a fluid discharge end, the locking element being located adjacent to the fluid discharge end, the counterstop being located adjacent to the fluid intake end.

3. A device in accordance with claim 1 , wherein the locking element is supported in a prestressed state at the support contour, so that the stop is in contact with the counterstop in an axially prestressed state.

4. A device in accordance with claim 1 , wherein the stop is arranged at an axial end section of the jacket, which end section is a leading end section in the pushing-in direction.

5. A device in accordance with claim 1 , wherein the jacket comprises an outer jacket surface, the outer jacket surface defining the stop, the stop comprising a jacket step, which extends in an annular pattern in a circumferential direction and connects an element-mounting section containing the at least one exhaust gas treatment element with a jacket collar, the jacket collar having an outer cross section that is smaller than an outer cross section of the element-mounting section, the outer jacket surface extending continuously, without interruption, from one end of the jacket to another end of the jacket.

6. A device in accordance with claim 1 , wherein the housing comprises an inner housing surface, the inner housing surface defining the counterstop, the counterstop comprising a housing step, which extends in an annular pattern in the circumferential direction and which connects an insert-mounting section containing the insert with a housing collar, the housing collar having an inner cross section that is smaller than an inner cross section of the insert-mounting section, the inner housing surface extending continuously, without interruption, from one end of the housing to another end of the housing.

7. A device in accordance with claim 1 , wherein:
the jacket comprises an outer jacket surface, the outer jacket surface defining the stop, the stop comprising a jacket step, which extends in an annular pattern in a circumferential direction and connects an element-mounting section containing the at least one exhaust gas treatment element with a jacket collar, the jacket collar having an outer cross section that is smaller than an outer cross section of the element-mounting section, the outer jacket surface extending continuously, without interruption, from one end of the jacket to another end of the jacket;
the housing comprises an inner housing surface, the inner housing surface defining the counterstop, the counterstop comprising a housing step, which extends in an annular pattern in the circumferential direction and which connects an insert-mounting section containing the insert with a housing collar, the housing collar having an inner cross section that is smaller than an inner cross section of the insert-mounting section, the inner housing surface extending from one end of the housing to another end of the housing;
the inner cross section of the housing collar is larger than the outer cross section of the jacket collar and smaller than the outer cross section of the element-mounting section; and
the inner cross section of the insert-mounting section is larger than the outer cross section of the element-mounting section.

8. A device in accordance with claim 1 , further comprising at least one a gap seal, wherein an annular gap, in which the at least one gap seal is arranged, is formed radially between the inner side of the housing and the outer side of the jacket.

9. A device in accordance with claim 1 , wherein the support contour is formed on an axial end face of the jacket, the end face facing away from the stop opposite the pushing-in direction.

10. A device in accordance with claim 1 , wherein at least one support bracket, which radially supports the jacket on the inner side of the housing, is provided on the jacket.

11. A device in accordance with claim 1 , wherein the insert has at least one extraction contour, with which an extraction tool configured to connect in a positive-locking manner in order to extract the insert from the housing.

12. A device in accordance with claim 1 , wherein the housing is configured be opened and closed again in an area located at a spaced location from the respective locking element opposite the pushing-in direction, wherein with the housing opened, the insert is configured be extracted from the housing and configured to be pushed into the housing.

13. An insert device for installation in an exhaust gas treatment device comprising a tubular housing with a counterstop and an insert to be arranged in the tubular housing, the insert device comprising:
a jacket;
at least one exhaust gas treatment element fixed in the jacket, the jacket being adapted to be pushed axially into the tubular housing in a pushing-in direction;
an axial stop axially in contact with the counterstop of the housing in an installed state of the jacket;
a support contour with a locking element axially supported in the installed state, the locking element fixing the insert in an axial direction with respect to a central longitudinal axis of the housing; and
another locking element to provide a plurality of locking elements,
wherein:
each of the locking elements has a ramp on a locking side interacting with the support contour;
each of the locking elements is located at a circumferentially spaced location from another one of the locking elements with respect to the central longitudinal axis; and
each of the locking elements arrange

Assignees

• Eberspaecher Exhaust Tech Gmbh

Inventors

• VYELYAYEV Oleksandr
• Ehrler Simon
• Henzler Markus

Classifications

• F01N3/2853

  using mats or gaskets between catalyst body and housing · CPC title

• F01N3/2839 Primary

  Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration · CPC title

• F01N3/0211

  Arrangements for mounting filtering elements in housing, e.g. with means for compensating thermal expansion or vibration · CPC title

• F01N3/2878

  by using non-elastic means for retaining catalyst body in the housing, e.g. a metal chamfer, or by corrugation or deformation of the metal housing · CPC title

• F01N3/2875

  by using elastic means, e.g. spring leaves, for retaining catalyst body in the housing (F01N3/2853 - F01N3/2871 take precedence) · CPC title