Protective device for preventing exhaust gas escape

Patent metadata

Field	Value
Publication number	US-10690037-B2
Application number	US-201715725187-A
Country	US
Kind code	B2
Filing date	Oct 4, 2017
Priority date	Oct 4, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

Methods and systems are provided for a coupling device and enclosure for an interface through which exhaust gas flow. The coupling device secures two sides of the interface to one another and the enclosure surrounds the interface and seals exhaust gases within the enclosure in an event that the interface becomes separated.

First claim

The invention claimed is:

1. An arrangement of an internal combustion engine with an exhaust gas section, in which at least one turbine with a first flange and an exhaust gas aftertreatment device with a second flange are arranged, which turbine and exhaust gas aftertreatment device are connected to one another rigidly at their flanges by at least one band bracket, a first surface of the first flange in face sharing contact with a second surface of the second flange, the first and second surfaces perpendicular to an exhaust flow direction, wherein a protective device is arranged in a region of the turbine, the band bracket and the exhaust gas aftertreatment device, the protective device having a first sealing region upstream of the band bracket, a second sealing region downstream of the band bracket, and a third sealing region circumferentially surrounding the band bracket, wherein the third sealing region includes only a first part and a second part which overlap one another with only a single circumferential overlap, with no other components between the first part and the second part throughout a total length of the overlap, and a sealing contact between the first part and the second part is maintained during movement of the protective device, where a length of the single overlap is such that sealing ability of the protective device is maintained even when the connection generated by the band bracket is broken due to tilting of the first flange relative to the second flange.

2. The arrangement as claimed in claim 1 , in which the protective device includes the first part and the second part which overlap one another, the first part having a greater diameter in an overlapping region than the second part.

3. The arrangement as claimed in claim 2 , in which the first part and the second part of the protective device are of telescopic configuration.

4. The arrangement as claimed in claim 2 , in which the first part of the protective device is welded to the exhaust gas section upstream of the first flange, and the second part is welded to the exhaust gas section downstream of the second flange.

5. The arrangement as claimed in claim 2 , in which the first part of the protective device is clamped to the exhaust gas section upstream of the turbine, and the second part is clamped to the exhaust gas section downstream of the exhaust gas aftertreatment device.

6. The arrangement as claimed in claim 1 , in which a material of the protective device includes a temperature-resistant material.

7. The arrangement as claimed in claim 6 , in which the temperature-resistant material of the protective device is a metal.

8. The arrangement as claimed in claim 6 , in which the temperature-resistant material of the protective device is a woven fabric.

9. The arrangement as claimed in claim 2 , in which the first and second parts of the protective device are connected to one another in the overlapping region in such a way that no fluid can penetrate the connection.

10. A system, comprising:
a turbocharger having a turbine-side housing rigidly coupled with a compressor-side housing via a V-band clamp at an interface therebetween, the interface including first and second flanges having surfaces in face-sharing contact, the surfaces perpendicular to a central axis of the turbocharger; and
an enclosure enclosing the interface, the enclosure having two sections configured to provide a first seal at the turbine-side housing, a second seal at the compressor-side housing, and a third seal between the two sections, along a circumference of the enclosure and around the interface, wherein the third seal includes only a first part and a second part which overlap one another with only a single circumferential overlap, with no other components between the first part and the second part throughout a total length of the overlap, where the length of the single overlap is such that sealing ability of the enclosure is maintained even when a connection generated by the V-band clamp is broken due to tilting of the first flange relative to the second flange.

11. The system of claim 10 , wherein the turbine-side housing and the compressor-side housing are coupled at the interface only via the V-band clamp and the enclosure, and not via bolts at the interface, and wherein the enclosure fully surrounds and fully encloses an entire circular exterior of the interface.

12. The system of claim 11 , wherein the turbine-side housing and the compressor-side housing mate at the interface via first and second internal walls.

13. The system of claim 12 , wherein the first and second internal walls are disposed within first and second flanges.

14. The system of claim 13 , wherein the first and second flanges have outer lips that extend outwards from the central axis of the turbocharger, and wherein the overlap extends along the central axis from the compressor-side housing to the turbine-side housing.

15. The system of claim 10 , wherein the first part has a larger diameter than the second part.

16. The system of claim 15 , wherein portions of the first and second parts of the enclosure overlap and wherein the second part of the enclosure is adapted to be contained within a cavity of the first part of the enclosure.

17. The system of claim 15 , wherein the enclosure is adapted to have telescopic movement, and wherein the second part of the enclosure slides in and out of the first part of the enclosure.

18. The system of claim 10 , wherein the enclosure is secured to the turbine-side housing and the compressor-side housing of the turbocharger via clamps or welding.

19. The system of claim 10 , wherein the enclosure is formed of a heat-resistant material or wherein the enclosure is flexible.

20. A system, comprising:
a turbocharger having a turbine-side housing rigidly coupled with a compressor-side housing via a V-band clamp at an interface therebetween, the interface forming a seal for exhaust gasses expanded by a turbine in the turbine-side housing, the interface including first and second flanges having surfaces in face-sharing contact, the surfaces perpendicular to a central axis of the turbocharger; and
an enclosure with two portions, completely enclosing an entirety of the interface and having a first turbine-side seal, a second compressor-side seal, and a third seal between the two portions, the third seal surrounding the interface, wherein the third seal includes only a first part and a second part which overlap one another in a direction of the central axis of the turbocharger, there being only a single circumferential overlap between the first and second parts, with no other components directly interposed between an inner wall of the first part and an outer wall of the second part both within the third seal and throughout a total length of the overlap of the third seal, the second part having a smaller outer radius than the first part, where the length of the single overlap is such that sealing ability of the enclosure is maintained even when a connection generated by the V-band clamp is broken due to tilting of the first flange relative to the second flange.

Assignees

• Ford Global Tech Llc

Inventors

• Meckenstock Daniel
• Sawatzki Marius
• Spurling Michael

Classifications

• F16L23/16 Primary

  characterised by the sealing means · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F02B39/16

  Other safety measures for, or other control of, pumps · CPC title

• F16L27/02

  Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction · CPC title

• F01N2340/06

  Arrangement of the exhaust apparatus relative to the turbine of a turbocharger · CPC title