Exhaust gas system for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10240488-B2
Application number	US-201515307810-A
Country	US
Kind code	B2
Filing date	Apr 30, 2015
Priority date	Apr 30, 2014
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

An exhaust gas system for a motor vehicle may include an exhaust gas aftertreatment device communicating fluidically with an exhaust gas evaporation device. The exhaust gas aftertreatment device and the exhaust gas evaporation device may be arranged in one or more housings. A connecting line may be provided to fluidically connect the exhaust gas aftertreatment device to the exhaust gas evaporation device. The connecting line may include a fluid inlet connected to the exhaust gas aftertreatment device and a fluid outlet connected to the exhaust gas evaporation device. An evaporation bypass line may branch off from the connection line at a branching-off point. A valve apparatus may be arranged in at least the connecting line and may be adjustable between a first position to fluidly connect the fluid inlet to the fluid outlet, and a second position to fluidly connect the fluid inlet to the evaporator bypass line.

First claim

The invention claimed is:

1. An exhaust gas system for a motor vehicle, comprising:
an exhaust gas aftertreatment device arranged in a first housing to a portion of the motor vehicle;
an exhaust gas evaporation device fluidically communicating with the exhaust gas aftertreatment device and arranged in a second housing;
at least one fastening element provided on the first housing and the second housing, the at least one fastening element configured to secure the first housing and the second housing to the portion of the motor vehicle;
at least one other fastening element arranged to secure the first housing and the second housing to one another;
a connecting line connecting the exhaust gas aftertreatment device fluidically to the exhaust gas evaporation device, the connecting line including a fluid inlet communicating fluidically with the exhaust gas aftertreatment device and a fluid outlet communicating fluidically with the exhaust gas evaporation device, the connecting line being arranged at least partially between the first housing and the second housing;
an evaporator bypass line communicating fluidically with a surrounding environment and branching off from the connecting line at a branching point; and
a valve apparatus arranged in the connecting line and adjustable between a first position and a second position, wherein the fluid inlet communicates fluidically with the fluid outlet in the first position and the fluid inlet communicates fluidically with the evaporator bypass line in the second position.

2. The exhaust gas system as claimed in claim 1 , wherein the branching point is arranged between the first housing of the exhaust gas aftertreatment device and the second housing of the exhaust gas evaporation device.

3. The exhaust gas system as claimed in claim 1 , wherein the connecting line and the evaporator bypass line are disposed integrally on the second housing of the exhaust gas evaporation device.

4. The exhaust gas system as claimed in claim 1 , wherein the valve apparatus includes a butterfly valve arranged at the branching point, the butterfly valve including at least two flap sections and a valve spindle arranged rotationally fixed between the at least two flap sections such that the butterfly valve is rotationally adjustable between the first position and the second position.

5. The exhaust gas system as claimed in claim 4 , wherein the at least two flap sections are configured to define a line wall section of the connecting line in the first position of the valve apparatus and define a line wall section of the evaporator bypass line in the second position of the valve apparatus.

6. The exhaust gas system as claimed in claim 4 , further comprising a common line wall section having a curved configuration disposed integrally between the connecting line and the evaporator bypass line, wherein the common line wall section delimits a transition region between the connecting line and the evaporator bypass line, and wherein at least one flap section of the at least two flap sections is adjustable in the transition region between the first position and the second position to adjust the valve apparatus.

7. The exhaust gas system as claimed in claim 1 , wherein the valve apparatus includes a valve spindle mounted adjustably on the connecting line and a valve flap attached on the valve spindle, wherein the valve flap closes the evaporator bypass line and releases the fluid outlet when the valve apparatus is in the first position, and the valve flap releases the evaporator bypass line and closes the fluid outlet when the valve apparatus is in the second position.

8. The exhaust gas system as claimed in claim 7 , wherein the valve apparatus further includes a prestressing device, the presstressing device configured to prestress the valve flap into the second position.

9. The exhaust gas system as claimed in claim 1 , wherein:
the valve apparatus includes a first butterfly valve including at least two flap sections and a valve spindle arranged rotationally fixedly between the at least two flap sections, the first butterfly valve arranged between the branching point of the evaporator bypass line and the fluid outlet in the connecting line, wherein the first butterfly valve releases the connecting line for communicating a flow through of exhaust gas when the valve apparatus is in the first position and closes the connecting line when the valve apparatus is in the second position; and
the valve apparatus further includes a second butterfly valve including at least two flap sections and a valve spindle arranged rotationally fixedly between the at least two flap sections of the second butterfly valve, the second butterfly valve arranged in the evaporator bypass line, wherein the second butterfly valve closes the evaporator bypass line when the valve apparatus is in the first position and releases the evaporator bypass line for communicating a flow through of exhaust gas when the valve apparatus is in the second position.

10. The exhaust gas system as claimed in claim 1 , wherein the connecting line and the bypass line are formed integrally on the second housing of the exhaust gas evaporation device.

11. An exhaust gas system for a motor vehicle, comprising: an exhaust gas aftertreatment device;
an exhaust gas evaporation device communicating fluidically with the exhaust gas aftertreatment device, the exhaust gas aftertreatment device and the exhaust gas evaporation device being arranged in a common housing;
at least one fastening element provided on the common housing for securing the common housing to a portion of the motor vehicle;
a connecting line fluidically connecting the exhaust gas aftertreatment device to the exhaust gas evaporation device, the connecting line including a fluid inlet communicating fluidically with the exhaust gas aftertreatment device and a fluid outlet communicating fluidically with the exhaust gas evaporation device;
an evaporator bypass line, wherein the exhaust gas aftertreatment device communicates fluidically via the evaporator bypass line with a surrounding environment;
the connecting line and the evaporator bypass line including a valve apparatus arranged adjustable between a first position and a second position, wherein in the first position of the valve apparatus the connecting line is released for communicating a flow through of exhaust gas and the evaporator bypass line is closed, and in the second position the second position of the valve apparatus the connecting line is closed and the evaporator bypass line is released for communicating a flow through of the exhaust gas;
a butterfly valve in at least one of the connecting line and the evaporator bypass line;
a dividing wall disposed in the common housing, the dividing wall separating the common housing into a first housing interior space and a second housing interior space;
the exhaust gas aftertreatment device is arranged in the first housing interior space and the exhaust gas evaporation device is arranged in the second housing interior space;
a first aperture receiving the connecting line arranged in the dividing wall; and a second aperture receiving the bypass connecting line arranged in the dividing wall; and
a third aperture receiving the evaporator bypass line arranged on a housing wall of the second housing interior space, the housing wall disposed opposite of the dividing wall;
wherein the evaporator bypass line extends through the second housing interior space and is separated fluidically from the second housing interior space.

12. The exhaust gas system as claimed in claim 11 , further comprising:
a through opening disposed on the housing wall, wherein the exhaust

Assignees

• Mahle Behr Gmbh & Co Kg

Inventors

• Irmler Klaus
• Schmidt Michael
• Geskes Peter
• Pantow Eberhard
• Kleber Andreas

Classifications

• F01N5/02 Primary

  the devices using heat · CPC title

• B60K13/04 Primary

  concerning exhaust · CPC title

• F01N2240/02

  a heat exchanger · CPC title

• F01N2410/02

  in case of high temperature, e.g. overheating of catalytic reactor · CPC title

• F01N13/1844

  Mechanical joints · CPC title