Internally shielded catalytic converter

• US 20040170540A1
• Filed: 02/27/2003
• Published: 09/02/2004
• Est. Priority Date: 02/27/2003
• Status: Active Grant

• Current Assignee: Automotive Components Holdings LLC (Ford Motor Company)
• Original Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Inventors: Seifert, Doug Michael, Zeng, Neil Yiding, Barron, Lana Holmblad
• Granted Patent: US 7,276,213 B2
• Time in Patent Office: Days
• US Class Current: 422/179
• CPC Class Codes: B01D 53/94 by catalytic processes
• CPC Class Codes: F01N 13/008 Mounting or arrangement of exhaust sensors in or on exhaust apparatus sensor arrangements for engine control F02D41/1439
• CPC Class Codes: F01N 13/0097 the purifying devices are arranged in a single housing
• CPC Class Codes: F01N 13/16 Selection of particular materials
• CPC Class Codes: F01N 2570/10 Carbon or carbon oxides
• CPC Class Codes: F01N 2570/14 Nitrogen oxides
• CPC Class Codes: F01N 3/28 Construction of catalytic reactors
• CPC Class Codes: F01N 3/2839 Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
• CPC Class Codes: F01N 3/2857 the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite

Abstract

The invention relates to a device for treating exhaust gases of internal combustion engines, including a housing, at least one gas treating body, a first support material, an internal shield, and a second support material. The housing includes an inlet, an outlet and an interior chamber between the inlet and the outlet. The gas treating body or bodies are located within the chamber, and the first support material is located between the outer surface of the gas treating body or bodies and the inner surface of the chamber. The internal shield is coupled with the inner surface of the housing via the second support material, which is located between the outer surface of the internal shield and the inner surface of the housing. The cross sectional area of the housing is generally constant in the region proximal to the internal shield.

Claims

1. An exhaust gas treatment device for an internal combustion engine, comprising;

a housing having portions defining an inlet, an outlet and an interior chamber between said inlet and said outlet;

at least one exhaust gas treating body located between said inlet within said chamber and said outlet;

a first support material located radially between an inner surface of said housing and said at least one exhaust gas treating body;

an internal shield located within said housing;

a second support material radially surrounding said internal shield and located between said inner surface of said housing and said internal shield, said second support material retaining said internal shield in engagement within said housing;

wherein said housing exhibits a substantially constant cross sectional area along its axial length in a region proximal to said internal shield.

2. A device as set out in claim 1 wherein said second support material has a second axial length, said internal shield has a first axial length, and said second axial length being not greater than said first axial length.

3. A device as set out in claim 1 wherein said first support material does not extend into areas radially between said internal shield and said housing.

4. A device as set out in claim 1 wherein said first support material is axially restricted to areas radially adjacent to said at least one exhaust gas treating body.

5. A device as set out in claim 1 wherein said second support material is in an interference fit between said internal shield and said housing.

6. A device as set out in claim 1 wherein said first support material is in an interference fit between said at least one exhaust gas treating body and said housing.

7. A device as set out in claim 1 wherein said internal shield includes at least one flared axial end.

8. A device as set out in claim 1 wherein said at least one flared axial end is radially outwardly flared.

9. A device as set out in claim 1 wherein said first support material retainingly engages said at least one exhaust gas treating body with said housing.

10. A device as set out in claim 1 further comprising a sensor mounted to said housing and extending through said housing, said second support material and said internal shield, said sensor terminating at a location within an internal diameter of said internal shield and within a flow path of exhaust gases.

11. A device as set out in claim 1 wherein said second support material is a thermal insulation material.