Heater with facilitated handling for the exhaust gas purification device of a vehicle

Patent metadata

Field	Value
Publication number	US-10731530-B2
Application number	US-201916252860-A
Country	US
Kind code	B2
Filing date	Jan 21, 2019
Priority date	Feb 1, 2018
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A heater is suitable to be arranged opposite and away from an upstream or downstream face of an exhaust gas purification member of a vehicle. The heater comprises a fastening ring with an electrically conductive frame having a geometric center, a central support arranged substantially at the geometric center of the frame, and a plurality of elongate heating elements each having first and second ends opposite one another. The first end is connected to the frame and the second end is connected to the central support. The fastening ring further comprises a plurality of electrically conductive radial protrusions distributed around the frame and protruding toward the outside of the frame.

First claim

The invention claimed is:

1. A heater for an exhaust gas purification device of a vehicle, suitable for being arranged opposite and away from an upstream or downstream face of an exhaust gas purification member of a vehicle, said heater comprising:
a fastening ring having a frame that is electrically conductive and has a geometric center;
a central support arranged substantially at the geometric center of the frame;
a plurality of elongate heating elements forming at least one layer permeable to exhaust gases, each elongate heating element having first and second ends opposite one another, the first end being connected to the frame and the second end being connected to the central support;
wherein the fastening ring further comprises a plurality of electrically conductive radial protrusions distributed around the frame, each electrically conductive radial protrusion protruding from the frame in a direction opposite the geometric center of the frame, and
wherein the frame has an inner face oriented toward the geometric center, an outer face oriented away from the geometric center, and a plurality of through orifices each emerging in said inner and outer faces, each elongate heating element being engaged in at least one of said plurality of through orifices.

2. The heater according to claim 1 , wherein the frame comprises an edge joining the inner face to the outer face and, for each through orifice, a slit is arranged in said edge, the slit extending from the inner face to the outer face and emerging in the through orifice.

3. The heater according to claim 1 , wherein the plurality of through orifices comprise, for each elongate heating element, a primary orifice and two secondary orifices, the secondary orifices being close to one another and remote from the primary orifice, the two secondary orifices being separated from one another by a frame portion, the first end of the elongate heating element extending through the primary orifice and forming a loop around the frame portion.

4. The heater according to claim 1 , wherein the central support comprises a washer made from a conductive material.

5. The heater according to claim 4 , wherein the washer comprises a first large face and a second large face opposite the first large face, and including a plurality of piercings emerging in each of said first and second large faces, the second end of each elongate heating element being curved in a hook shape and engaged in one of said plurality of piercings.

6. The heater according to claim 5 , wherein, for each piercing, the second ends of two elongate heating elements are engaged in said piercing.

7. A supply member for an exhaust gas purification device for a vehicle, the supply member comprising:
an enclosure made from an electrically conductive material, said enclosure having an upstream face by which the exhaust gases penetrate the supply member and a downstream face by which the exhaust gases leave the supply member, and
the heater according to claim 1 , housed in the enclosure, opposite the downstream face,
the heater being mounted in said enclosure such that each radial protrusion is in contact with the enclosure.

8. The supply member according to claim 7 , comprising a power source and an electrode electrically connecting the central support to a first terminal of said power source, said electrode extending through the enclosure while being electrically isolated from said enclosure, the enclosure being electrically connected to a second terminal of the power source or to the ground.

9. An exhaust gas purification device of a vehicle comprising
at least one exhaust gas purification member having an upstream face by which the exhaust gases penetrate the at least one exhaust gas purification member and a downstream face by which the exhaust gases leave the at least one exhaust gas purification member, the exhaust gas purification device further comprising at least one supply member according to claim 7 arranged so as to cause the downstream face of the enclosure of said at least one supply member substantially to coincide with the upstream face of the at least one exhaust gas purification member.

Assignees

• Faurecia Systemes Dechappement
• Faurecia Systems Dechappement

Inventors

• Bartolo Xavier Pierre François
• Tournier Christophe

Classifications

• F01N3/2013

  using electric or magnetic heating means · CPC title

• F01N3/027 Primary

  using electric or magnetic heating means · CPC title

• F01N2240/16

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

• H05B3/06

  Heater elements structurally combined with coupling elements or holders · CPC title

• F01N3/2066

  Selective catalytic reduction [SCR] · CPC title