US 12,372,017 B2Granted

Exhaust gas treatment assembly

AssigneePurem GmbH

InventorsGregor Krüger, Matthias Kauer, Frank Glaser, Kirill Karelin, Shengxiao Lin, Peter Kast

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Abstract

An exhaust gas treatment assembly for an exhaust system of an internal combustion engine includes a housing having a circumferential wall and at least one base wall which in an external circumferential region is connected to the circumferential wall. In a housing interior space, which is defined by the circumferential wall and the base wall, at least one exhaust gas treatment unit is positioned so as to be removable from the housing. At least one base wall is an interchangeable base wall which is releasably connected to the circumferential wall via a connection assembly. The connection assembly includes a first connection portion, a first axial support portion, and on the base wall includes a second connection portion which via at least one connection member is releasably connected to the first connection portion and a second axial support portion is supported on the first axial support portion.

Claims24

Dependent claims

An exhaust gas treatment assembly for an exhaust system of an internal combustion engine, the exhaust gas treatment assembly comprising:

a housing having a circumferential wall and at least one base wall;
said circumferential wall being elongate in the direction of a housing longitudinal axis;
said at least one base wall being, in an external circumferential region, connected to said circumferential wall;
said circumferential wall and said at least one base wall defining a housing interior space;
at least one exhaust gas treatment unit positioned so as to be removable from said housing;
said at least one base wall being an interchangeable base wall which is releasably connected to said circumferential wall via a connection assembly;
said connection assembly, on said circumferential wall, including a first connection portion extending in a direction of the housing longitudinal axis and a first axial support portion which, in relation to said first connection portion, extends radially inward;
and,
said connection assembly, on said interchangeable base wall, including a second connection portion which, radially adjacent to and axially overlapping said first connection portion, extends in the direction of the housing longitudinal axis, said axially overlapping first and second connection portions being releasably connected to each other by a plurality of connection members, and a second axial support portion which, in relation to said second connection portion, extends radially inward and in the direction of the housing longitudinal axis is supported on said first axial support portion.

6 more elements

An exhaust gas treatment assembly for an exhaust system of an internal combustion engine, the exhaust gas treatment assembly comprising:

a housing having a circumferential wall and at least one base wall;
said circumferential wall being elongate in the direction of a housing longitudinal axis;
said at least one base wall being, in an external circumferential region, connected to said circumferential wall;
said circumferential wall and said at least one base wall defining a housing interior space;
at least one exhaust gas treatment unit positioned so as to be removable from said housing;
said at least one base wall being an interchangeable base wall which is releasably connected to said circumferential wall via a connection assembly;
said connection assembly, on said circumferential wall, including a first connection portion extending in a direction of the housing longitudinal axis and a first axial support portion which, in relation to said first connection portion, extends radially inward;
and,
said connection assembly, on said interchangeable base wall, including a second connection portion which, radially adjacent to said first connection portion, extends in the direction of the housing longitudinal axis and is releasably connected to said first connection portion via at least one connection member, and a second axial support portion which, in relation to said second connection portion, extends radially inward and in the direction of the housing longitudinal axis is supported on said first axial support portion;
wherein:
a plurality of first connection-member penetration openings are provided in said first connection portion, said plurality of first connection-member penetration openings being disposed so as to be mutually spaced apart in at least one of the circumferential direction about the housing longitudinal axis and the direction of the housing longitudinal axis;
a plurality of second connection-member penetration openings are provided in said second connection portion, said plurality of second connection-member penetration openings being disposed so as to be mutually spaced apart in at least one of the circumferential direction about the housing longitudinal axis and the direction of the housing longitudinal axis;
and,
when said interchangeable base wall is connected to said circumferential wall, a plurality of pairs of in each case one of said first connection-member penetration openings and one of said second connection-member penetration openings are in each case penetrated by one of said at least one connection members.

11 more elements

An exhaust gas treatment assembly for an exhaust system of an internal combustion engine, the exhaust gas treatment assembly comprising:

a housing having a circumferential wall and at least one base wall;
said circumferential wall being elongate in the direction of a housing longitudinal axis;
said at least one base wall being, in an external circumferential region, connected to said circumferential wall;
said circumferential wall and said at least one base wall defining a housing interior space;
at least one exhaust gas treatment unit positioned so as to be removable from said housing;
said at least one base wall being an interchangeable base wall which is releasably connected to said circumferential wall via a connection assembly;
said connection assembly, on said circumferential wall, including a first connection portion extending in a direction of the housing longitudinal axis and a first axial support portion which, in relation to said first connection portion, extends radially inward;
and,
said connection assembly, on said interchangeable base wall, including a second connection portion which, radially adjacent to said first connection portion, extends in the direction of the housing longitudinal axis and is releasably connected to said first connection portion via at least one connection member, and a second axial support portion which, in relation to said second connection portion, extends radially inward and in the direction of the housing longitudinal axis is supported on said first axial support portion;
wherein:
said second connection portion and said second axial support portion are provided on a first base element of said interchangeable base wall;
a second base element, which conjointly with the first base element delimits an insulation volume is disposed on a side of said second axial support portion facing away from said housing interior space;
and
said second axial support portion in a second transition region adjoins said second connection portion;
said second transition region includes a transition portion extending in the direction of the housing longitudinal axis and in relation to said second connection portion is radially offset at a radial spacing from said first connection portion;
and, said second base element in a region of said transition portion is connected to said first base element.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/057,089Filed 18 Nov 2022
Priority: DE 10 2021 130 261.719 Nov 2021
Published: US 2023/0160327 A125 May 2023
Granted: 29 Jul 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F01N 3/0211
By means of filters: arrangements for mounting filtering elements in housing, e.g. with means for compensating thermal expansion or vibration
F01N 13/1805
Construction facilitating manufacture, assembly, or disassembly: fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine…
F01N 13/1844
Characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and…
F01N 13/1855
Mechanical joints: the connection being realised by using bolts, screws, rivets or the like