Exhaust gas mixer arrangement

Patent metadata

Field	Value
Publication number	US-10184433-B2
Application number	US-201615195013-A
Country	US
Kind code	B2
Filing date	Jun 28, 2016
Priority date	Jun 29, 2015
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

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 defined in a mixer housing and having an inlet and an outlet downstream of the inlet, wherein the exhaust gas flow duct has a winding duct path between the inlet and the outlet, the mixer housing comprising a central housing part, a first side housing part and a second side housing part, the first side housing part defining, with the central housing part, a first flow duct area leading away from the inlet to a passage opening formed in a cylindrical or funnel-shaped bulge of the central housing part, the second side housing part defining, with the central housing part, a second flow duct area leading from the passage opening to the outlet, wherein the first flow duct area of the exhaust gas flow duct runs in a flow duct plane in a first flow duct section following the inlet and, subsequently to the first flow duct section, the first flow duct area has a second flow duct section leading through the passage opening and out of the flow duct plane; and
an additive injection arrangement for injecting additive into the first flow duct section, and wherein 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.

2. An exhaust gas mixer arrangement in accordance with 1 , wherein an exhaust gas flow direction at the inlet corresponds to an exhaust gas flow direction at the outlet.

3. An exhaust gas mixer arrangement in accordance with claim 1 , wherein the additive injection arrangement injects additive at an area of the additive injection close to the inlet area of the exhaust gas flow duct.

4. An exhaust gas mixer arrangement in accordance with claim 3 , wherein a main injection direction of the additive injection arrangement essentially corresponds to an exhaust gas flow direction in the exhaust gas flow duct in the area of the additive injection.

5. An exhaust gas mixer arrangement in accordance with claim 1 , wherein the central housing part is arranged between the first side housing part and the second side housing part.

6. 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 comprising an inlet, an outlet, a first side housing part, a central housing part, a second side housing part and an exhaust gas flow duct in fluid communication with the inlet and the outlet, the central housing part comprising a passage opening, the exhaust gas flow duct comprising at least one bend, the outlet being located downstream of the inlet with respect to a flow of exhaust fluid, the first side housing part and the central housing part defining a first flow duct area of the exhaust gas flow duct, the first flow duct area extending away from the inlet to the passage opening, the second side housing part and the central housing part defining a second flow duct area of the exhaust gas flow duct, the second flow duct area extending from the passage opening to the outlet, the second flow duct area being in fluid communication with the first flow duct area via the passage opening; and
an additive injection arrangement for injecting additive into the first flow duct area, the additive injection arrangement comprising an injector nozzle, the central housing part comprising an injector nozzle receiving opening, at least a portion of the injector nozzle being arranged in the injector nozzle receiving opening, wherein a deflection of flow in the range of 150° to 210° takes place in the first flow duct area and a deflection out of the flow duct plane in the range of 70° to 110° takes place in the second flow duct area.

7. An exhaust gas mixer arrangement in accordance with claim 6 , wherein the central housing part comprises a cylindrical or funnel-shaped bulge, the cylindrical or funnel-shaped bulge defining the passage opening.

8. An exhaust gas mixer arrangement in accordance with claim 6 , wherein the first flow duct area of the exhaust gas flow duct extends in a flow duct plane in a first flow duct section following the inlet and the first flow duct area has a second flow duct section leading through the passage opening and out of the flow duct plane, the second flow duct section being located downstream of the first flow duct section with respect to the flow of exhaust fluid.

9. An exhaust gas mixer arrangement in accordance with 6 , wherein an exhaust gas flow direction at the inlet corresponds to an exhaust gas flow direction at the outlet.

10. An exhaust gas mixer arrangement in accordance with claim 6 , wherein a main injection direction of the additive injection arrangement essentially corresponds to an exhaust gas flow direction in the exhaust gas flow duct in the area of the additive injection.

11. An exhaust gas mixer arrangement in accordance with claim 6 , wherein the central housing part is arranged between the first side housing part and the second side housing part.

12. 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 comprising an inlet, an outlet, a first side housing part, a central housing part, a second side housing part and an exhaust gas flow duct in fluid communication with the inlet and the outlet, the outlet being located downstream of the inlet with respect to a flow of exhaust fluid, the first side housing part comprising a first side housing part inner surface, the second side housing part comprising a second side housing part inner surface, the central housing part comprising a passage opening, a central housing part first side surface and a central housing part second side surface, the central housing part first side surface being located on one side of the central housing part and the central housing part second side surface being located on another side of the central housing part, the exhaust gas flow duct comprising at least one bend, the first side housing part inner surface and the central housing part side first surface defining the inlet and a first flow duct area of the exhaust gas flow duct, the first flow duct area extending away from the inlet to the passage opening, the second side housing part inner surface and the central housing part second side surface defining the outlet and a second flow duct area of the exhaust gas flow duct, the second flow duct area extending from the passage opening to the outlet; and
an additive injection arrangement for injecting additive into the first flow duct area, the additive injection arrangement comprising an injector nozzle, the central housing part comprising an injector nozzle receiving opening, at least a portion of the injector nozzle being arranged in the injector nozzle receiving opening, wherein a deflection of flow in the range of 150° to 210° takes place in the first flow duct area and a deflection out of the flow duct plane in the range of 70° to 110° takes place in the second flow duct area.

13. An exhaust gas mixer arrangement in accordance with claim 12 , wherein the first side housing part inner surface comprises at least one first side housing part bent portion, the central housing part first side surface comprising at least one central housing part bent portion, the at least one central housing part bent portion being located opposite the at least one first side housing part bent portion, the at least one first side housing

Assignees

• Eberspaecher Exhaust Tech Gmbh

Inventors

• Ferront Hervé
• Sang Wei
• Binder David

Classifications

• B01F5/0647

  Operations & Transport · mapped topic

• B01F3/04049

  Operations & Transport · mapped topic

• F01N3/2892

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

• F02M26/15 Primary

  in relation to engine exhaust purifying apparatus · CPC title

• F01N13/1894

  the parts being assembled in longitudinal direction · CPC title