Insulated exhaust gas conduit systems

Patent metadata

Field	Value
Publication number	US-12013075-B2
Application number	US-201917785291-A
Country	US
Kind code	B2
Filing date	Dec 17, 2019
Priority date	Dec 17, 2019
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

An insulated exhaust gas conduit system includes a first exhaust gas conduit, a second exhaust gas conduit, a first insulation sleeve, and a second insulation sleeve. The first exhaust gas conduit has a first exhaust gas conduit end portion. The second exhaust gas conduit has a second exhaust gas conduit end portion that is configured to engage with the first exhaust gas conduit end portion. The first insulation sleeve includes a first insulation sleeve insulation layer and a first insulation sleeve heat shield. The first insulation sleeve insulation layer is disposed around the first exhaust gas conduit. The first insulation sleeve heat shield is disposed around the first insulation sleeve insulation layer. The first insulation sleeve extends beyond the first exhaust gas conduit end portion. The second insulation sleeve includes a second insulation sleeve insulation layer and a second insulation sleeve heat shield.

First claim

What is claimed is:

1. An insulated exhaust gas conduit system comprising:
a first exhaust gas conduit having a first exhaust gas conduit end portion;
a second exhaust gas conduit having a second exhaust gas conduit end portion configured to engage with the first exhaust gas conduit end portion;
a first insulation sleeve comprising:
a first insulation sleeve insulation layer; and
a first insulation sleeve heat shield disposed around the first insulation sleeve insulation layer,
wherein a first portion of the first insulation sleeve insulation layer is disposed around the first exhaust gas conduit, and a second portion of the first insulation sleeve insulation layer extends beyond the first exhaust gas conduit end portion and is disposed around the second exhaust gas conduit end portion, and the first portion and the second portion of the first insulation sleeve insulation layer are formed as a single continuous piece; and

a second insulation sleeve comprising:
a second insulation sleeve insulation layer disposed around the second exhaust gas conduit; and
a second insulation sleeve heat shield disposed around the second insulation sleeve insulation layer,
wherein the second exhaust gas conduit end portion is exposed from the second insulation sleeve, wherein:

the first insulation sleeve insulation layer comprises:
a first insulation sleeve insulation layer body interfacing with the first exhaust gas conduit; and
a first insulation sleeve insulation layer end contiguous with the first insulation sleeve insulation layer body and separated from the first exhaust gas conduit;

the first insulation sleeve heat shield comprises:
a first insulation sleeve heat shield body interfacing with the first insulation sleeve insulation layer body and the first insulation sleeve insulation layer end; and
a first insulation sleeve heat shield end portion contiguous with the first insulation sleeve heat shield body, the first insulation sleeve heat shield end portion interfacing with the first insulation sleeve insulation layer end and extending inward from the first insulation sleeve heat shield body towards the second exhaust gas conduit.

2. The insulated exhaust gas conduit system of claim 1 , wherein:
the second insulation sleeve insulation layer comprises:
a second insulation sleeve insulation layer body interfacing with the second exhaust gas conduit; and
a second insulation sleeve insulation layer end contiguous with the second insulation sleeve insulation layer body and interfacing with the second exhaust gas conduit;

the second insulation sleeve heat shield comprises:
a second insulation sleeve heat shield body interfacing with the second insulation sleeve insulation layer body and the second insulation sleeve insulation layer end; and
a second insulation sleeve heat shield end portion contiguous with the second insulation sleeve heat shield body, the second insulation sleeve heat shield end portion interfacing with the second insulation sleeve insulation layer end and extending from the second insulation sleeve heat shield body towards the second exhaust gas conduit.

3. The insulated exhaust gas conduit system of claim 2 , wherein the second insulation sleeve heat shield end portion is in confronting relation with the first insulation sleeve heat shield end portion.

4. The insulated exhaust gas conduit system of claim 1 ,
wherein the second exhaust gas conduit comprises:
a second exhaust gas conduit body that interfaces with the second insulation sleeve insulation layer and is separated from the second insulation sleeve heat shield by the second insulation sleeve insulation layer, the second exhaust gas conduit body having a first diameter; and

wherein the second exhaust gas conduit end portion comprises:
a second exhaust gas conduit flange that is contiguous with the second exhaust gas conduit body; and
a second exhaust gas conduit collar that is contiguous with the second exhaust gas conduit flange and separated from the second exhaust gas conduit body by the second exhaust gas conduit flange, the second exhaust gas conduit collar having a second diameter greater than the first diameter.

5. The insulated exhaust gas conduit system of claim 1 , wherein the second exhaust gas conduit end portion interfaces with the first exhaust gas conduit and the first insulation sleeve insulation layer.

6. The insulated exhaust gas conduit system of claim 1 , wherein the first exhaust gas conduit end portion comprises a radially-extending end surface separated from the first insulation sleeve insulation layer end.

7. The insulated exhaust gas conduit system of claim 1 , wherein the first exhaust gas conduit and the first insulation sleeve insulation layer cooperate to define a channel configured to receive the second exhaust gas conduit end portion.

8. The insulated exhaust gas conduit system of claim 7 , wherein the channel is configured to receive the second exhaust gas conduit end portion, such that a portion of the first insulation sleeve is disposed around a portion of a main body of the second exhaust gas conduit before the second exhaust gas conduit end portion.

9. The insulated exhaust gas conduit system of claim 1 , further comprising an exhaust gas conduit clamp, the exhaust gas conduit clamp comprising a connection portion that connects ends of the exhaust gas conduit clamp to one another, the exhaust gas conduit clamp configured to secure the first exhaust gas conduit to the second exhaust gas conduit.

10. The insulated exhaust gas conduit system of claim 9 , wherein the first insulation sleeve comprises a cutout portion at which the connection portion of the exhaust gas conduit clamp is exposed from the first insulation sleeve.

11. The insulated exhaust gas conduit system of claim 1 , wherein the first insulation sleeve heat shield body is separated from the first exhaust gas conduit by the first insulation sleeve insulation layer.

12. The insulated exhaust gas conduit system of claim 11 , wherein the second insulation sleeve heat shield comprises:
a second insulation sleeve heat shield body interfacing with the second insulation sleeve insulation layer and separated from the second exhaust gas conduit by the second insulation sleeve insulation layer; and
a second insulation sleeve heat shield end portion interfacing with the second insulation sleeve insulation layer and extending from the second insulation sleeve heat shield body towards the second exhaust gas conduit, the second insulation sleeve heat shield end portion in confronting relation with the first insulation sleeve heat shield end portion.

13. An insulated exhaust gas conduit system comprising:
a first exhaust gas conduit having a first exhaust gas conduit end portion;
a second exhaust gas conduit having a second exhaust gas conduit end portion configured to couple to the first exhaust gas conduit end portion at a joint, the second exhaust gas conduit end portion comprising a flange configured to overlap the first exhaust gas conduit end portion at the joint;
a first insulation layer disposed on the first exhaust gas conduit, wherein the first insulation layer extends beyond the first exhaust gas conduit end portion;
a second insulation layer disposed on the second exhaust gas conduit, wherein the second insulation layer ends before the second exhaust gas conduit end portion, such that the second exhaust gas conduit end portion is exposed from the second insulation layer;
a first heat shield disposed on the first insulation layer;
a second heat shield disposed on the second insulation layer; and
an exhaust gas conduit clamp configured to secure the first e

Assignees

• Cummins Emission Solutions Inc

Inventors

• Canik Jacob D
• Komisarek Andrew
• Verseman Corey

Classifications

• F16L21/065 Primary

  tightened by tangentially-arranged threaded pins · CPC title

• F01N13/148

  Multiple layers of insulating material · CPC title

• F16L59/182 Primary

  Joints with sleeve or socket · 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

• F01N13/14

  having thermal insulation {(exhaust manifolds F01N13/102)} · CPC title