Exhaust-gas treatment module

Patent metadata

Field	Value
Publication number	US-11680508-B2
Application number	US-202217737699-A
Country	US
Kind code	B2
Filing date	May 5, 2022
Priority date	May 6, 2021
Publication date	Jun 20, 2023
Grant date	Jun 20, 2023

Abstract

An exhaust-gas treatment module for an exhaust system of an internal combustion engine has a plurality of elements which follow one another in an exhaust-gas flow direction. The elements include a first mixing path with a first reactant dispensing arrangement in an upstream end region of the first mixing path and with a first mixing channel which is elongate in the direction of a first mixing path longitudinal axis. A first exhaust-gas treatment arrangement follows and is elongate in the direction of a first exhaust-gas treatment arrangement longitudinal axis and has an upstream end region connected to a downstream end region of the first mixing path, a second mixing path with a second reactant dispensing arrangement in an upstream end region which is connected to a downstream end region of the first exhaust-gas treatment arrangement.

First claim

What is claimed is:

1. An exhaust-gas treatment module for an exhaust system of an internal combustion engine, the exhaust-gas treatment module defining an exhaust-gas flow direction and an exhaust-gas treatment module longitudinal axis (L), said exhaust-gas treatment module comprising:
a first exhaust-gas treatment arrangement;
a first mixing path associated with said first exhaust-gas treatment arrangement and having upstream and downstream end regions and defining a first mixing path longitudinal axis (M 1 );
said first mixing path including a first reactant dispensing arrangement in said upstream end region thereof for dispensing a first reactant;
said first mixing path further including a first mixing channel elongated in a direction of said first mixing path longitudinal axis (M 1 );
said first exhaust-gas treatment arrangement defining a first exhaust-gas treatment longitudinal axis (A 1 ) and being elongated in a direction of said first exhaust-gas treatment longitudinal axis (A 1 ), said first exhaust-gas treatment arrangement including at least one exhaust-gas treatment unit, at least one exhaust-gas treatment unit of said at least one exhaust-gas treatment unit of said first exhaust-gas treatment arrangement including at least one SCR catalytic converter unit;
said first exhaust-gas treatment arrangement having upstream and downstream end regions and said upstream end region being connected to said downstream end region of said first mixing path;
a second exhaust-gas treatment arrangement;
a second mixing path associated with said second exhaust-gas treatment arrangement and defining a second mixing path longitudinal axis (M 2 ) and having upstream and downstream end regions and said upstream end region thereof being connected to said downstream end region of said first exhaust-gas treatment arrangement;
said second mixing path having a second reactant dispensing arrangement in said upstream end region thereof for dispensing a second reactant;
said second mixing path having a second mixing channel elongated in a direction of said second mixing path longitudinal axis (M 2 );
said second exhaust-gas treatment arrangement defining a second exhaust-gas treatment arrangement longitudinal axis (A 2 ) and being elongated in a direction of said second exhaust-gas treatment longitudinal axis (A 2 ), said second exhaust-gas treatment arrangement including at least one exhaust-gas treatment unit, at least one exhaust-gas treatment unit of said at least one exhaust-gas treatment unit of said second exhaust-gas treatment arrangement including at least one SCR catalytic converter unit;
said second exhaust-gas treatment arrangement having an upstream end region connected to said downstream end region of said second mixing path and a downstream end region open for releasing at least one of exhaust gas and reactant; and,
wherein said first mixing path, said first exhaust-gas treatment arrangement, said second mixing path and said second exhaust-gas treatment arrangement overlap one another in a direction of said exhaust-gas treatment module longitudinal axis (L), wherein said first mixing path, said first exhaust-gas treatment arrangement, said second mixing path and said second exhaust-gas treatment arrangement are arranged so as to follow one another about said exhaust-gas treatment module longitudinal axis (L) so as to cause said first mixing path and said second mixing path to lie diametrically opposite one another with respect to said exhaust-gas treatment module longitudinal axis (L) and so as to cause said first exhaust-gas treatment arrangement and said second exhaust-gas treatment arrangement to lie diametrically opposite one another with respect to said exhaust-gas treatment module longitudinal axis (L).

2. The exhaust-gas treatment module of claim 1 , wherein said first mixing path longitudinal axis (M 1 ), said first exhaust-gas treatment arrangement longitudinal axis (A 1 ), said second mixing path longitudinal axis (M 2 ) and said second exhaust-gas treatment arrangement longitudinal axis (A 2 ) being at least one of the following:
i) mutually parallel; and,
ii) parallel to said exhaust-gas treatment module longitudinal axis (L).

3. The exhaust-gas treatment module of claim 1 , wherein at least one of said upstream end region of said first mixing path, said downstream end region of said first exhaust-gas treatment arrangement, said upstream end region of said second mixing path and said downstream end region of said second exhaust-gas treatment arrangement are arranged in the same axial region with respect to said exhaust-gas treatment module longitudinal axis (L).

4. The exhaust-gas treatment module of claim 1 , wherein at least one of said downstream end region of said first mixing path, said upstream end region of said first exhaust-gas treatment arrangement, said downstream end region of said second mixing path and said upstream end region of said second exhaust-gas treatment arrangement are arranged in the same axial region with respect to the exhaust-gas treatment module longitudinal axis (L).

5. The exhaust-gas treatment module of claim 1 , wherein at least one of the following applies:
a) said exhaust-gas treatment module further comprises a first flow-diverting housing connecting said downstream end region of said first mixing path to said upstream end region of said first exhaust-gas treatment arrangement;
b) said exhaust-gas treatment module further comprises a second flow-diverting housing connecting said downstream end region of said first exhaust-gas treatment arrangement to said upstream end region of said second mixing path; and,
c) said exhaust-gas treatment module further comprises a third flow-diverting housing connecting said downstream end region of said second mixing path to said upstream end region of said second exhaust-gas treatment arrangement.

6. The exhaust-gas treatment module of claim 5 , further comprising first, second and third outer housing walls;
said first, second and third flow-diverting housings having respective first, second and third housing inner walls;
said first, second and third outer housing walls and said first, second and third housing inner walls conjointly defining respective first, second and third flow-diverting volumes; and,
said first, second and third housing inner walls having respective first, second and third inlet openings leading to corresponding ones of said first, second and third flow-diverting volumes and having respective first, second and third outlet openings leading out of corresponding ones of said first, second and third flow-diverting volumes.

7. The exhaust-gas treatment module of claim 5 , wherein said second reactant dispensing arrangement is supported on the second flow-diverting housing.

8. The exhaust-gas treatment module of claim 1 , further comprising an inlet flow-diverting housing; said upstream end region of said first mixing path being connected to said inlet flow-diverting housing; and, said first reactant dispensing arrangement being supported on said inlet flow-diverting housing.

9. The exhaust-gas treatment module of claim 8 , wherein said inlet flow-diverting housing includes a housing inner wall and a housing outer wall; said housing inner wall and said housing outer wall conjointly delimit an inner volume; said housing inner wall of said inlet flow-diverting housing has an outlet opening provided therein leading from said inlet volume into said first mixing path; said outlet opening is an outlet opening of said inlet flow-diverting housing; and, said first reactant dispensing arrangement is supported on said housing outer wall of said inlet flow-diverting housing.

10. The exhaust-gas treatment module of clai

Assignees

• Purem GmbH

Inventors

• Brenner Holger

Classifications

• F01N2610/1453

  Sprayers or atomisers; Arrangement thereof in the exhaust apparatus · CPC title

• B01D53/9418

  for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas · CPC title

• F01N2610/02

  the substance being ammonia or urea · CPC title

• B01F23/2132

  using nozzles · CPC title

• F01N3/2892 Primary

  Exhaust flow directors or the like, e.g. upstream of catalytic device · CPC title