Exhaust gas mixer arrangement

Patent metadata

Field	Value
Publication number	US-2016377033-A1
Application number	US-201615195013-A
Country	US
Kind code	A1
Filing date	Jun 28, 2016
Priority date	Jun 29, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

An exhaust gas mixer arrangement for mixing exhaust gases of an internal combustion engine with an additive comprises an exhaust gas flow duct ( 28 ) with an inlet area ( 24 ) arranged upstream and with a discharge area ( 26 ) arranged downstream. The exhaust gas flow duct ( 28 ) is bent in a coil-like manner at least in some areas between the inlet area ( 24 ) and the discharge area ( 26 ).

First claim

What is claimed is:

1 . An exhaust gas mixer arrangement for mixing exhaust gases of an internal combustion engine with an additive, the exhaust gas mixer arrangement comprising:
an exhaust gas flow duct with an inlet area arranged upstream and with a discharge area arranged downstream, wherein the exhaust gas flow duct has a coil shape bend at least in some areas between the inlet area and the discharge area.

2 . An exhaust gas mixer arrangement in accordance with claim 1 , wherein the exhaust gas flow duct runs essentially in a flow duct plane in a first flow duct section following the inlet area and subsequently has a second flow duct section leading out of the flow duct plane at the first flow duct section.

3 . An exhaust gas mixer arrangement in accordance with claim 2 , wherein a deflection of flow in the range of 150° to 210° takes place in the first flow duct section or a deflection out of the flow duct plane in the range of 70° to 110° takes place in the second flow duct section or both a deflection of flow in the range of 150° to 210° takes place in the first flow duct section and a deflection out of the flow duct plane in the range of 70° to 110° takes place in the second flow duct section.

4 . An exhaust gas mixer arrangement in accordance with claim 1 , wherein the exhaust gas flow duct comprises a mixer housing comprising:
a central housing part; a first side housing part defining with the central housing part a first flow duct area leading away from the inlet area to a passage area; and a second side housing part defining, with the central housing part, a second flow duct area leading from the passage area to the discharge area.

5 . An exhaust gas mixer arrangement in accordance with claim 4 , wherein the passage area comprises at least one passage opening formed in the central housing part.

6 . An exhaust gas mixer arrangement in accordance with claim 5 , wherein the at least one passage opening is formed in the area of a cylindrical or funnel-shaped bulge of the central housing part.

7 . An exhaust gas mixer arrangement in accordance with claim 2 , wherein:
the exhaust gas flow duct comprises a mixer housing comprising: a central housing part; a first side housing part defining with the central housing part a first flow duct area leading away from the inlet area to a passage area; a second side housing part defining, with the central housing part, a second flow duct area leading from the passage area to the discharge area; and the first flow duct area comprises essentially the first flow duct section and the second flow duct section.

8 . An exhaust gas mixer arrangement in accordance with 1 , wherein an exhaust gas flow direction in the inlet area essentially corresponds to an exhaust gas flow direction in the discharge area.

9 . An exhaust gas mixer arrangement in accordance with claim 1 , further comprising an additive injection arrangement for injecting additive at an area of the additive injection close to the inlet area of the exhaust gas flow duct.

10 . An exhaust gas mixer arrangement in accordance with claim 2 , further comprising an additive injection arrangement for injecting additive at an area of the additive injection close to the inlet area of the exhaust gas flow duct, wherein the additive injection arrangement is essentially arranged in the first flow duct section.

11 . An exhaust gas mixer arrangement in accordance with claim 9 , wherein a main injection direction of the additive injection arrangement essentially corresponds to a main flow direction of the combustion waste gases in the exhaust gas flow duct in the area of the additive injection.

12 . An exhaust gas mixer arrangement in accordance with claim 1 , wherein the exhaust gas flow duct comprises a winding duct path between the inlet area and the discharge area.

13 . An exhaust gas mixer arrangement in accordance with claim 2 , wherein a deflection of flow in the range of about 180° takes place in the first flow duct section or a deflection out of the flow duct plane of about 90° takes place in the second flow duct section or both a deflection of flow in the range of about 180° takes place in the first flow duct section and a deflection out of the flow duct plane of about 90° takes place in the second flow duct section.

14 . An exhaust gas mixer arrangement for mixing exhaust gases of an internal combustion engine with an additive, the exhaust gas mixer arrangement comprising a mixer housing forming an exhaust gas flow duct with an inlet area arranged upstream and with a discharge area arranged downstream and a coil-shaped winding duct path between the inlet area and the discharge area.

15 . An exhaust gas mixer arrangement in accordance with claim 14 , wherein the winding duct path is essentially in a flow duct plane in a first flow duct section following the inlet area and subsequently leads out of the flow duct plane in a second flow duct section.

16 . An exhaust gas mixer arrangement in accordance with claim 15 , wherein a deflection of flow in the range of 150° to 210° takes place in the first flow duct section or a deflection out of the flow duct plane in the range of 70° to 110° takes place in the second flow duct section or both a deflection of flow in the range of 150° to 210° takes place in the first flow duct section and a deflection out of the flow duct plane in the range of 70° to 110° takes place in the second flow duct section.

17 . An exhaust gas mixer arrangement in accordance with claim 16 , wherein the mixer housing comprises:
a central housing part; a first side housing part defining with the central housing part a first flow duct area leading away from the inlet area to a passage area; and a second side housing part defining, with the central housing part, a second flow duct area leading from the passage area to the discharge area.

18 . An exhaust gas mixer arrangement in accordance with claim 17 , wherein the passage area comprises at least one passage opening formed in the central housing part and formed in the area of a cylindrical or funnel-shaped bulge of the central housing part.

19 . An exhaust gas mixer arrangement in accordance with claim 17 , wherein the first flow duct area comprises essentially the first flow duct section and the second flow duct section.

20 . An exhaust gas mixer arrangement in accordance with 17 , wherein an exhaust gas flow direction in the inlet area essentially corresponds to an exhaust gas flow direction in the discharge area.

Assignees

• Eberspächer Exhaust Tech Gmbh & Co Kg

Inventors

• Ferront Hervé
• Sang Wei
• Binder David

Classifications

• F02M26/15 Primary

  in relation to engine exhaust purifying apparatus · CPC title

• F01N3/2892

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

• B01F25/3141

  with additional mixing means other than injector mixers · CPC title

• B01F25/4331

  Mixers with bended, curved, coiled, wounded mixing tubes or comprising elements for bending the flow · CPC title

• B01F23/2132

  using nozzles · CPC title