Exhaust gas post-treatment device

Patent metadata

Field	Value
Publication number	US-2016298518-A1
Application number	US-201415036848-A
Country	US
Kind code	A1
Filing date	Nov 12, 2014
Priority date	Nov 22, 2013
Publication date	Oct 13, 2016
Grant date	—

Abstract

A device, in particular an exhaust gas post-treatment device, having a pipe, in particular an exhaust pipe, through which a gas flow, in particular exhaust gas of an internal combustion engine, s is guided; having an injection device, associated with the pipe, for metered injection of a fluid medium, in particular exhaust gas post-treatment agent, into the gas flow; and having at least one mixing apparatus that is disposed in the pipe downstream from the injection device and has several air guidance elements disposed in one plane. Provision is made that the plane is oriented at least substantially perpendicularly to an injection direction of the injection device.

First claim

1 - 10 . (canceled)

11 . An exhaust gas post-treatment device, comprising:
an exhaust pipe, through which a gas flow is guided, the gas flow being an exhaust gas of an internal combustion engine; an injection device, associated with the pipe, for metered injection of an exhaust gas post-treatment agent into the gas flow; and at least one mixing apparatus disposed in the pipe downstream from the injection device, the mixing apparatus having several air guidance elements disposed in one plane, wherein the plane is oriented at least substantially perpendicularly to an injection direction of the injection device.

12 . The exhaust gas post-treatment device as recited in claim 1 , wherein the air guidance elements are embodied in vane-like fashion and are disposed in the pipe in at least substantially radially oriented fashion with a distribution around a circumference of the pipe.

13 . The exhaust gas post-treatment device as recited in claim 11 , wherein the air guidance elements are oriented at least substantially obliquely with regard to a flow direction of the gas flow in the pipe upstream from the mixing apparatus.

14 . The exhaust gas post-treatment device as recited in claim 11 , wherein the air guidance elements are twisted along their respective at least substantially radially oriented longitudinal axis.

15 . The exhaust gas post-treatment device as recited in claim 11 , wherein the air guidance elements are at a radial distance from an enveloping wall of the pipe.

16 . The exhaust gas post-treatment device as recited in claim 15 , wherein the air guidance elements are disposed on a support element disposed centeredly in the pipe.

17 . The exhaust gas post-treatment device as recited in claim 16 , wherein the support element is embodied as a tubular element on which the air guidance elements are disposed projecting radially inward.

18 . The exhaust gas post-treatment device as recited in claim 16 , wherein the support element is embodied as a tubular element on which the air guidance elements are disposed facing outward toward the enveloping wall of the pipe.

19 . The exhaust gas post-treatment device as recited in claim 17 , wherein the support elements are embodied integrally with the tubular element.

20 . The exhaust gas post-treatment device as recited in claim 11 , wherein at least two mixing apparatuses are disposed in the pipe, located one behind another in a flow direction.

Assignees

• Bosch Gmbh Robert

Inventors

• Kloeckner Siegurd
• Alt Christian

Classifications

• F01N3/2066

  Selective catalytic reduction [SCR] · CPC title

• F01N13/1805

  Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body (pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K) · CPC title

• F01N2610/102

  after addition to exhaust gases, e.g. by a passively or actively heated surface in the exhaust conduit · CPC title

• F01N3/2892 Primary

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

• F01N2240/20

  a flow director or deflector · CPC title