Vehicle exhaust system

Patent metadata

Field	Value
Publication number	US-11725567-B2
Application number	US-202117489985-A
Country	US
Kind code	B2
Filing date	Sep 30, 2021
Priority date	Jun 17, 2019
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A vehicle exhaust system for allowing passage of exhaust gasses therethrough. The vehicle exhaust system has a first pipe having a first end and a second end. The first end defines an exhaust gas inlet and the second end defines an exhaust gas outlet. The vehicle exhaust system also has a second pipe positioned downstream of the first pipe and has a third end and a fourth end. At least a portion of the second end of first pipe is positioned within the third end of the second pipe defining an overlap between the second end of the first pipe and the third end of the second pipe. The first pipe and the second pipe together define a volume for the exhaust gasses. The volume comprises a first volume passageway between the exhaust gas inlet and the exhaust gas outlet and a second volume passageway defined by the overlap of the second pipe and the first pipe and having an inlet for exhaust gasses into the second volume passageway and an outlet from the second volume passageway positioned axially upstream of inlet. The inlet is positioned downstream of the exhaust gas outlet

First claim

What is claimed is:

1. A vehicle exhaust system for allowing passage of exhaust gasses therethrough, the vehicle exhaust system comprising:
a first pipe having a first end and a second end; the first end defining an exhaust gas inlet and the second end defining an exhaust gas outlet;
a second pipe positioned downstream of the first pipe and having a third end and a fourth end, at least a portion of the second end of first pipe is positioned within the third end of the second pipe defining an overlap between the second end of the first pipe and the third end of the second pipe, the fourth end defining an outlet end; the second pipe further comprising an opening positioned adjacent the third end;
the first pipe and the second pipe together defining a volume for the exhaust gasses; the volume comprising:
a first volume passageway defining a primary exhaust passageway between the exhaust gas inlet and the outlet end for allowing exhaust gases to exit the first volume passageway;
a second volume passageway defining a secondary exhaust gas passageway defined by the overlap of the second pipe and the first pipe and having a secondary exhaust gas passageway inlet for allowing exhaust gasses into the second volume passageway and a secondary exhaust gas passageway outlet from the second volume passageway by way of an opening in the second pipe positioned axially upstream of the secondary exhaust gas passageway inlet for allowing exhaust gasses to exit the second volume passageway.

2. The vehicle exhaust system of claim 1 , wherein the volume of exhaust gasses flowing through the secondary exhaust gas passageway is less than a volume of the exhaust gases flowing through the primary exhaust gas passageway.

3. The vehicle exhaust system of claim 1 , wherein the outlet defines one or more openings within the second volume passageway such that the one or more openings provide an exhaust gas flow path.

4. The vehicle exhaust system of claim 1 , wherein a diameter of the second pipe at the third end is greater than a diameter of the first pipe at the second end.

5. The vehicle exhaust system of claim 1 , wherein the first pipe and the second pipe are joined together by welding.

6. The vehicle exhaust system of claim 1 , wherein the first and second pipes define a tailpipe.

7. A vehicle exhaust system for allowing passage of exhaust gasses therethrough, the vehicle exhaust system comprising:
a first pipe having a first end and a second end;
a second pipe positioned downstream of the first pipe and having a third end and a fourth end, the third end of the second pipe at least partially overlapping the second end of the first pipe, the first pipe and the second pipe defining a first exhaust gas passageway defined by an exhaust gas inlet at the first end and an exhaust gas outlet at the fourth end for allowing exhaust gases to exit the first volume passageway;
the overlap of the first and second pipe defining a second exhaust gas passageway;
wherein the second exhaust gas passageway has a secondary exhaust gas passageway inlet for allowing exhaust gasses into the second exhaust gas passageway and a secondary exhaust gas passageway outlet from the second exhaust gas passageway at the third end of the second pipe which is positioned axially upstream of the secondary exhaust gas passageway inlet.

8. The vehicle exhaust system of claim 7 , wherein a volume of exhaust gasses flowing through the secondary exhaust gas passageway is less than a volume of exhaust gases flowing through the primary exhaust gas passageway.

9. The vehicle exhaust system of claim 7 , wherein the secondary exhaust gas passageway outlet is positioned at the third end of second pipe.

10. The vehicle exhaust system of claim 7 , wherein the secondary exhaust gas passageway outlet defines one or more openings within the second gas passageway such that the one or more openings provide an exhaust gas flow path.

11. The vehicle exhaust system of claim 7 , wherein a diameter of the downstream pipe at the third end is greater than a diameter of the upstream pipe at the second end.

12. The vehicle exhaust system of claim 7 , wherein the first pipe and the second pipe are joined together by welding.

13. The vehicle exhaust system of claim 7 , wherein the first and second pipes define a tailpipe.

14. A tubular component for a vehicle exhaust system comprising:
an upstream pipe having a first end and a second end; the first end defining an exhaust gas inlet;
a downstream pipe having a third end and a fourth end, the fourth end defining an exhaust gas outlet, at least a portion of the second end of first pipe is positioned within the third end of the second pipe defining an overlap between the second end of the first pipe and the third end of the second pipe; and
wherein the upstream pipe and the downstream pipe together defining a volume for the exhaust gasses; the volume comprising:
a first volume passageway between the exhaust gas inlet and the exhaust gas outlet for allowing exhaust gases to exit the first volume passageway;
a second volume passageway defined by the overlap of the downstream pipe and the upstream pipe and having a second volume passageway inlet for exhaust gasses into the second volume passageway and a second volume passageway outlet from the second volume passageway positioned axially upstream of inlet; and
wherein the secondary exhaust gas passageway outlet is defined by an opening in the second pipe adjacent the third end.

15. The tubular component of claim 14 , wherein the volume of exhaust gasses flowing through the secondary exhaust gas passageway is less than a volume of the exhaust gases flowing through the primary exhaust gas passageway.

Assignees

• Tenneco Automotive Operating Co Inc

Inventors

• Golin Michael A
• Ostromecki Gabriel
• Baumgartner Frederick M

Classifications

• F01N13/141 Primary

  Double-walled exhaust pipes or housings · CPC title

• F01N13/1838

  characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles · CPC title

• F01N1/02 Primary

  by using resonance · CPC title

• F01N3/021

  by means of filters · CPC title

• F01N3/08

  for rendering innocuous (using electric or electrostatic separators F01N3/01; chemical aspects B01D53/92) · CPC title