Device for purifying exhaust gas with optimized heating

Patent metadata

Field	Value
Publication number	US-11480085-B2
Application number	US-202117181210-A
Country	US
Kind code	B2
Filing date	Feb 22, 2021
Priority date	Feb 28, 2020
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A purification device comprises a housing comprising a generally cylindrical wall extending along a longitudinal axis. At least one purification member is arranged in the housing and is intended to be arranged in an exhaust gas flow. The purification device comprises at least one heating element arranged in contact with the purification member, the heating element extending in a plane perpendicular to the longitudinal axis.

First claim

The invention claimed is:

1. A purification device for purifying exhaust gases, comprising:
a housing including a wall of generally cylindrical shape extending along a longitudinal axis;
at least one purification unit arranged in the housing and intended to be arranged in an exhaust gas flow, wherein the purification device comprises at least one heating element arranged in contact with the at least one purification unit, the at least one heating element extending in a plane perpendicular to the longitudinal axis, and wherein the at least one heating element is formed by the deposition of an electrically conductive compound; and
wherein the at least one heating element extends in a groove formed in at least one of an upstream and downstream surface of the at least one purification unit, and wherein the groove extends between a first end and a second end that are at a peripheral edge of the at least one purification unit opposite from each other, and wherein the at least one heating element is connected at each of the first and second ends to an electrode.

2. The purification device according to the claim 1 , wherein the at least one purification unit presents a generally cylindrical shape extending between the upstream surface and the downstream surface.

3. The purification device according to the claim 2 , wherein the groove extends in a boustrophedon back and forth pattern on the upstream and/or downstream surface.

4. The purification device according to claim 1 , wherein the at least one purification unit presents a generally cylindrical shape extending between the upstream surface and the downstream surface, and wherein the at least one heating element comprises two heating elements, each in contact with a respective one of the upstream and downstream surfaces.

5. The purification device according to claim 1 , wherein the at least one purification unit presents a generally cylindrical shape extending between the upstream surface and the downstream surface, the at least one heating element extending in contact with each of the upstream and downstream surfaces.

6. The purification device according to claim 1 , wherein the at least one purification unit comprises two purification units arranged in contact with each other, the at least one heating element being interposed between the two purification units.

7. The purification device according to claim 1 , wherein the at least one heating element is housed inside the at least one purification unit.

8. The purification device according to claim 1 , wherein the at least one heating element is entirely in contact with the at least one purification unit.

9. The purification device according to claim 1 , wherein the at least one purification unit comprises a catalytic substrate positioned within the housing.

10. An internal combustion engine exhaust system, comprising:
a purification device for purifying exhaust gases, the purification device comprising a housing including a wall of generally cylindrical shape extending along a longitudinal axis, and the purification device comprising at least one purification unit arranged in the housing and intended to be arranged in an exhaust gas flow, wherein the purification device comprises at least one heating element arranged in contact with the at least one purification unit, the at least one heating element extending in a plane perpendicular to the longitudinal axis, and wherein the at least one heating element is formed by the deposition of an electrically conductive compound; and
wherein the at least one heating element extends in a groove formed in at least one of an upstream and downstream surface of the at least one purification unit, and wherein the groove extends between a first end and a second end that are at a peripheral edge of the at least one purification unit opposite from each other, and wherein the at least one heating element is connected at each of the first and second ends to an electrode.

11. The internal combustion engine exhaust system according to claim 10 , wherein the at least one heating element is entirely in contact with the at least one purification unit.

12. The internal combustion engine exhaust system according to claim 10 , wherein the at least one purification unit comprises a catalytic substrate positioned within the housing.

13. A vehicle comprising:
an internal combustion engine exhaust system comprising a purification device for purifying exhaust gases, the purification device comprising a housing including a wall of generally cylindrical shape extending along a longitudinal axis, and the purification device comprising at least one purification unit arranged in the housing and intended to be arranged in an exhaust gas flow, wherein the purification device comprises at least one heating element arranged in contact with the at least one purification unit, the at least one heating element extending in a plane perpendicular to the longitudinal axis, and wherein the at least one heating element is formed by the deposition of an electrically conductive compound; and
wherein the at least one heating element extends in a groove formed in at least one of an upstream and downstream surface of the at least one purification unit, and wherein the groove extends between a first end and a second end that are at a peripheral edge of the at least one purification unit opposite from each other, and wherein the at least one heating element is connected at each of the first and second ends to an electrode.

14. The vehicle according to claim 13 , wherein the at least one heating element is entirely in contact with the at least one purification unit.

15. The vehicle according to claim 13 , wherein the at least one purification unit comprises a catalytic substrate positioned within the housing.

Assignees

• Faurecia Systemes Dechappement

Inventors

• Viault Christophe
• Capirchia Mathieu

Classifications

• F01N13/0097

  the purifying devices are arranged in a single housing · CPC title

• F01N3/2013 Primary

  using electric or magnetic heating means · CPC title

• F01N3/027

  using electric or magnetic heating means · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01N2240/16

  an electric heater, i.e. a resistance heater · CPC title