Exhaust-gas tract for a motor vehicle

Patent metadata

Field	Value
Publication number	US-11525379-B2
Application number	US-202117468934-A
Country	US
Kind code	B2
Filing date	Sep 8, 2021
Priority date	Oct 13, 2020
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

An exhaust-gas tract for a motor vehicle has an exhaust-gas burner that includes an air inlet connection for the introduction of air into the exhaust-gas burner. The air inlet connection has a connection piece in which a check valve for the closure of the connection piece is arranged. The air inlet connection has an air inlet flange which connects the connection piece to a combustion chamber of the exhaust-gas burner and which seals off the combustion chamber. A motor vehicle incorporates the exhaust-gas tract.

First claim

What is claimed is:

1. An exhaust-gas tract for a motor vehicle, wherein the exhaust-gas tract comprises:
an exhaust-gas burner having an air inlet connection through which air is introduced into the exhaust-gas burner, wherein the air inlet connection has (i) a connection piece, (ii) a check valve arranged in the connection piece that is configured for closing the connection piece, and (iii) an air inlet flange that connects the connection piece to a combustion chamber of the exhaust-gas burner and seals off the combustion chamber,
wherein the check valve includes (i) a valve housing, (ii) a valve disk that is configured to be pressed against the valve housing, and (iii) a guide rod for guiding the valve disk between an open position of the check valve and a closed position of the check valve, wherein the guide rod is mounted on a support on the connection piece, wherein the support is arranged on a support holder of the connection piece.

2. The exhaust-gas tract as claimed in claim 1 , wherein the air inlet flange is a turned part or deep-drawn part and/or the connection piece is a turned part or deep-drawn part.

3. The exhaust-gas tract as claimed in claim 1 , wherein the valve disk is bell-shaped, and wherein the valve disk is pressed against the valve housing in order to close the check valve.

4. The exhaust-gas tract as claimed in claim 3 , wherein the valve disk has a first sealing surface that is configured to seal against a second sealing surface of the valve housing in order to close the check valve.

5. The exhaust-gas tract as claimed in claim 4 , wherein a rubber coating for sealing is arranged on the first sealing surface and/or on the second sealing surface.

6. The exhaust-gas tract as claimed in claim 4 , wherein the valve housing is a turned part, and wherein the second sealing surface is finely turned.

7. The exhaust-gas tract as claimed in claim 4 , wherein neither the first sealing surface nor the second sealing surface has a rubber coating for sealing provided thereon, wherein the first sealing surface and/or the second sealing surface are manufactured from metal.

8. The exhaust-gas tract as claimed in claim 3 , wherein the check valve is preloaded into a closed position by a spring, wherein the preload is adjustable by a threaded nut.

9. The exhaust-gas tract as claimed in claim 3 , wherein the valve disk is a pressed part or deep-drawn part and the first sealing surface is ground.

10. The exhaust-gas tract as claimed in claim 1 , wherein the check valve is clipped into the air inlet connection, and wherein the check valve is configured to be removed from the air inlet connection in a nondestructive fashion.

11. A motor vehicle having the exhaust-gas tract as claimed in claim 1 .

12. An exhaust-gas tract for a motor vehicle, wherein the exhaust-gas tract comprises:
an exhaust-gas burner having an air inlet connection through which air is introduced into the exhaust-gas burner, wherein the air inlet connection has (i) a connection piece, (ii) a check valve arranged in the connection piece that is configured for closing the connection piece, and (iii) an air inlet flange that connects the connection piece to a combustion chamber of the exhaust-gas burner and seals off the combustion chamber,
wherein the check valve includes a valve housing and a bell-shaped valve disk, wherein the valve disk is pressed against the valve housing,
wherein the check valve is preloaded into a closed position by a spring, wherein the preload is adjustable by a threaded nut,
wherein the check valve has a guide rod for guiding the valve disk between an open position of the check valve and a closed position of the check valve, wherein the guide rod is mounted on a support on the connection piece, wherein the support is arranged on a conically shaped support holder of the connection piece.

Assignees

• Porsche Ag

Inventors

• Sofan Uli
• Noe Marcel

Classifications

• F01N3/025

  using fuel burner or by adding fuel to exhaust · CPC title

• F01N3/30

  Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22) · CPC title

• F01N3/38

  Arrangements for igniting · CPC title

• F01N2610/14

  Arrangements for the supply of substances, e.g. conduits · CPC title

• Y02A50/20

  Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters · CPC title