Vehicle exhaust gas purification device, corresponding production method, exhaust line and vehicle
AssigneeFaurecia Systemes D'Echappement
InventorsEric Ottaviani, Thomas Sommier, Yannick Fourcaudot, Ting Feng
Life of this patent
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Abstract
A purification device includes a tubular shell having an inner surface and an electric heating member housed in the tubular shell. The heating member comprises a heating element made of an electrically conductive material which is permeable to exhaust gases. The device also includes an attachment of the heating element directly on the inner surface.
Claims18
An exhaust gas purification device for a vehicle, the exhaust gas purification device comprising:
- a tubular shell having an inner surface and having a central axis;
- an electric heating member housed in the tubular shell, the electric heating member comprises a heating element made of an electrically conductive material which is permeable to exhaust gases, wherein the heating element is made of a foam, and the heating element having a central portion in which the foam has a first density and at least one reinforced edge area in which the foam has a second density greater than the first density;
- a power supply configured to supply power to the electric heating member;
- and
- an attachment configured to directly attach the heating element to the inner surface, and the attachment securing the, or each of, the at least one reinforced edge area to the inner surface.
An exhaust gas purification device for a vehicle, the exhaust gas purification device comprising:
- a tubular shell having an inner surface and having a central axis;
- an electric heating member housed in the tubular shell, the electric heating member comprises a heating element made of an electrically conductive material which is permeable to exhaust gases;
- a power supply configured to supply power to the electric heating member;
- an attachment configured to directly attach the heating element to the inner surface, wherein the attachment comprises a layer of electrically insulating material interposed between the heating element and the inner surface;
- wherein the attachment comprises a peripheral frame surrounding the heating element and attached to the tubular shell, the layer of electrically insulating material being directly interposed between the peripheral frame and the heating element;
- and
- wherein the tubular shell has welding holes at the peripheral frame and welds joining the peripheral frame to the tubular shell through the welding holes.
A method of manufacturing an exhaust gas purification device for a vehicle, the exhaust gas purification device comprising:
- a tubular shell having an inner surface and having a central axis;
- an electric heating member housed in the tubular shell, the electric heating member comprises a heating element made of an electrically conductive material which is permeable to exhaust gases;
- a power supply configured to supply power to the electric heating member;
- an attachment configured to directly attach the heating element to the inner surface, wherein the attachment comprises a layer of electrically insulating material interposed between the heating element and the inner surface;
- wherein the attachment comprises a peripheral frame surrounding the heating element and attached to the tubular shell, the layer of electrically insulating material being directly interposed between the peripheral frame and the heating element;
- wherein the tubular shell has welding holes at the peripheral frame and welds joining the peripheral frame to the tubular shell through the welding holes;
- and
- the method comprising a step of attaching the peripheral frame to the tubular shell by welding through welding holes provided in the tubular shell on the peripheral frame.
Dependencies are inferred from the claim text.