DE102008031060A1 - Device for distributing exhaust gas flow in exhaust gas pipe, has guide plate which is arranged in exhaust gas pipe, where guide plate extends in flow direction over complete longitudinal direction of exhaust gas pipe - Google Patents

Abstract

The device has a guide plate (5) which is arranged in an exhaust gas pipe (4). The guide plate extends in flow direction over a complete longitudinal direction of the exhaust gas pipe. The progression of guide plate follows the progression of the exhaust gas pipe. The guide plate is fixed and welded at an inner wall of the exhaust gas pipe.

Description

The The invention relates to a device for distributing an exhaust gas flow arranged in one between an exhaust gas turbocharger and a catalytic converter Exhaust pipe, in particular exhaust manifold, an internal combustion engine, wherein in the exhaust pipe at least one baffle is arranged.

Out the prior art is known that optimized due to space Construction in an engine compartment of a vehicle, for example, a Supply line of an inflow channel of a catalyst such is arranged curved, that an exhaust gas flow unequal distributed, whereby the catalyst have a one-sided load can.

From the DE 198 38 703 A1 is a device for flow calming and distribution of an exhaust gas stream in an exhaust pipe of an internal combustion engine, in particular at the exhaust side output of the internal combustion engine downstream exhaust gas turbocharger known. The device is formed from a guide plate, which comprises a plurality of web plates extending in the flow direction in a small longitudinal extent and extending transversely to the exhaust pipe. The baffle is for this purpose connected by welding or pressing with the exhaust pipe.

Of the Invention is based on the object, a relation to the Prior art improved device for uniform distribution of a Specify exhaust flow.

The The object is achieved by the in the claim 1 specified characteristics solved. Advantageous developments The invention are the subject of the dependent claims.

The The invention relates to a device for distributing an exhaust gas flow arranged in one between an exhaust gas turbocharger and a catalytic converter Exhaust pipe, in particular exhaust manifold, an internal combustion engine, wherein in the exhaust pipe at least one baffle is arranged. According to the invention, the baffle extends in Flow direction over an entire longitudinal extent the exhaust pipe, whereby the exhaust stream is particularly preferably at least approximately over the entire course of the exhaust pipe is equally distributed and the catalyst at one end with an approximately uniform distribution the exhaust stream can be acted upon. This is preferably a known from the prior art reduced power of the catalyst avoided and ensured an efficient emission control effect. In addition, the catalyst is no longer one-sided loaded, causing a premature wear effect excluded and thus a lifetime of the catalyst advantageous is increased.

The Device is particularly advantageous in any internal combustion engine can be used to optimize the flow of the catalyst to realize.

embodiments The invention will be explained in more detail with reference to drawings.

there demonstrate:

1 schematically a section of an exhaust system of an internal combustion engine in a perspective view, and

2 schematically a sectional view of an arranged between an exhaust gas turbocharger and a catalyst exhaust pipe with arranged in this baffle.

each other corresponding parts are denoted by the same reference numerals in all drawings Mistake.

In 1 is a section of an exhaust system 1 , in particular a combustion engine according to the prior art in a perspective view.

It is between an exhaust gas turbocharger 2 and a catalyst 3 an exhaust pipe 4 , in particular an exhaust manifold, as a supply of an exhaust gas flow to the catalyst 3 arranged. Due to the small available space within an engine compartment is the exhaust pipe 4 arranged so curved that a risk of uneven flow distribution of the exhaust gas stream within the catalyst 3 arises, whereby this can have a shortcoming. The catalyst 3 is flowed unequally, whereby this is loaded on one side. This can cause a premature wear effect of the catalyst 3 use, resulting in a shortened life results.

In 2 is an enlarged sectional view of the between the exhaust gas turbocharger 2 and the catalyst 3 arranged exhaust pipe 4 shown.

To pressure losses within the exhaust pipe 4 and an uneven flow of the catalyst 3 is to be avoided according to the invention in the flow direction R over an entire longitudinal extent of the exhaust pipe 4 a baffle 5 arranged. Here is the baffle 5 preferably directly at an outlet opening 2.1 the exhaust gas turbocharger 2 arranged. It ends at an entrance opening 3.1 a front side of the catalyst 3 , whereby this can be acted upon with a uniform distribution of the exhaust gas flow. The course of the baffle follows 5 the course of the exhaust pipe 4 ,

In one possible embodiment, the baffle 5 also in the entrance opening 3.1 of the catalyst 3 protrude.

By the arrangement of the baffle 5 in the exhaust pipe 4 the exhaust gas flow is specifically steerable, causing this within the exhaust pipe 4 more preferably at least approximately evenly distributed.

The baffle 5 For this purpose, it is preferably on an inner wall 4.1 of the exhaust pipe 4 fixed material and form-fitting, in particular welded. For example, the baffle 5 punctually on the inner wall 4.1 be welded.

Here is the baffle 5 with respect to the inner diameter d of the exhaust pipe 4 arranged in the half, in particular fastened, whereby the exhaust stream is preferably steered in particular divided. This is the catalyst 3 Optimized against flow, whereby the one-sided load of the catalyst 3 is avoided and thus advantageously increases the life.

A width b or height h of the baffle 5 corresponds to a maximum of the inner diameter d of the exhaust pipe 4 , where the baffle 5 on the inner wall 4.1 depending on an arrangement of the catalyst 3 is attached.

The baffle 5 can be arranged in an advantageous manner in addition to other positions of an exhaust system of an internal combustion engine in order to achieve an even distribution of the exhaust gas flow.

The baffle 5 is designed in particular as a molded part and designed, for example, as a sheet metal or plastic part.

1

exhaust system

2

turbocharger

2.1

outlet opening

3

catalyst

3.1

inlet opening

4

exhaust pipe

4.1

inner wall

5

baffle

R

flow direction

b

width

d

Inner diameter

H

height

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19838703 A1 [0003]

Claims (5)

Device for distributing an exhaust gas flow in one between an exhaust gas turbocharger ( 2 ) and a catalyst ( 3 ) arranged exhaust pipe ( 4 ), in particular exhaust manifold, of an internal combustion engine, wherein in the exhaust pipe ( 4 ) at least one baffle ( 5 ), characterized in that the baffle ( 5 ) in the flow direction (R) over an entire longitudinal extent of the exhaust pipe ( 4 ). Apparatus according to claim 1, characterized in that the course of the baffle ( 5 ) the course of the exhaust pipe ( 2 ) follows. Apparatus according to claim 1 or 2, characterized in that the guide plate ( 5 ) on an inner wall ( 4.1 ) of the exhaust pipe ( 4 ) is attached. Apparatus according to claim 3, characterized in that the baffle ( 5 ) to the inner wall ( 4.1 ) of the exhaust pipe ( 4 ) is welded. Device according to one of claims 1 to 4, characterized in that a width (b) or a height (h) of the baffle ( 5 ) maximum one inner diameter (d) of the exhaust pipe ( 4 ) corresponds.