EXHAUST GAS SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

• US 20170211439A1
• Filed: 03/20/2015
• Published: 07/27/2017
• Est. Priority Date: 08/01/2014
• Status: Active Grant

• Current Assignee: Audi AG (Volkswagen AG)
• Original Assignee: Audi AG (Volkswagen AG)
• Inventors: PETERS, AXEL
• Granted Patent: US 10,458,298 B2
• Time in Patent Office: Days
• CPC Class Codes: F01N 1/02 by using resonance
• CPC Class Codes: F01N 1/023 Helmholtz resonators
• CPC Class Codes: F01N 1/161 for adjusting resonance or dead chambers or passages to resonance or dead chambers
• CPC Class Codes: F01N 13/02 having two or more separate silencers in series
• CPC Class Codes: F01N 13/04 having two or more silencers in parallel, e.g. having interconnections for multi-cylinder engines
• CPC Class Codes: F01N 2470/14 Plurality of outlet tubes, e.g. in parallel or with different length
• CPC Class Codes: F01N 2470/20 Dimensional characteristics of tubes, e.g. length, diameter
• CPC Class Codes: F01N 2490/00 Structure, disposition or shape of gas-chambers

Abstract

An exhaust gas system for an internal combustion engine includes a first exhaust gas line leading into a first muffler; a second exhaust gas line arranged fluidly parallel to the first exhaust gas line and leading into a second muffler, wherein the first and second exhaust gas lines are respectively connected upstream of the first and second muffler at a branch to a common exhaust gas feed line; a control valve arranged in the first exhaust gas line upstream of the first muffler; and a damping device fluidly arranged between the branch and the control valve and adapted for damping exhaust gas resonance vibrations.

Claims

1-10. -10. (canceled)

11. An exhaust gas system for an internal combustion engine comprising:

a first exhaust gas line leading into a first muffler;

a second exhaust gas line arranged fluidly parallel to the first exhaust gas line and leading into a second muffler, said first and second exhaust gas lines respectively being connected upstream of the first and second muffler at a branch to a common exhaust gas feed line;

a control valve arranged in the first exhaust gas line upstream of the first muffler;

a damping device fluidly arranged between the branch and the control valve and adapted for damping exhaust gas resonance vibrations, said damping device having a flow connection between the first exhaust gas line and the second exhaust gas line; and

a throttle or a cross section adjustment element provided in the flow connection.

12. The exhaust gas system of claim 11, wherein the cross section adjustment element is constructed as a spring-loaded check valve.

13. The exhaust gas system of claim 11, wherein the damping device has a sound absorber.

14. The exhaust gas system of claim 13, wherein the sound absorber is constructed as a resonance absorber.

15. The exhaust gas system of claim 11, wherein the damping device has a flow rectifier.

16. The exhaust gas system of claim 15, wherein the flow rectifier has at least one throttle, which leads into an open-jet volume.

17. The exhaust gas system of claim 11, wherein the second exhaust gas line is configured without a control valve.

18. The exhaust gas system of claim 11, further comprising an exhaust gas turbocharger provided upstream of the branch.