Electrically heated catalyst device and its manufacturing method

Patent metadata

Field	Value
Publication number	US-2016271561-A1
Application number	US-201415031382-A
Country	US
Kind code	A1
Filing date	Oct 8, 2014
Priority date	Dec 4, 2013
Publication date	Sep 22, 2016
Grant date	—

Abstract

An electrically heated catalyst device 100 according to an aspect of the present invention includes a catalyst support 20 supporting a catalyst thereon, a thin plate-like wiring line member 40 fixed on an outer circumferential surface of the catalyst support 20, an outer cylinder 70 with an opening 71 formed on its side, the outer cylinder 70 covering the outer circumferential surface of the catalyst support 20, the opening 71 being configured for externally pulling out the wiring line member 40, and a holding member 60, the holding member 60 filling up space between the catalyst support 20 and the outer cylinder 70 and thereby holding the catalyst support 20, in which the catalyst support 20 is electrically heated through the wiring line member 40. A pull-out part 43 of the wiring line member 40 pulled out through the opening 71 is formed in an accordion shape.

First claim

1 . An electrically heated catalyst device comprising:
a catalyst support supporting a catalyst thereon; a thin plate-like wiring line member fixed on an outer circumferential surface of the catalyst support; an outer cylinder with an opening formed on its side, the outer cylinder covering the outer circumferential surface of the catalyst support, the opening being configured so that the wiring line member can be externally pulled out therethrough; and a holding member, the holding member filling up a space between the catalyst support and the outer cylinder and thereby holding the catalyst support, wherein the catalyst support is electrically heated through the wiring line member, and a pull-out part of the wiring line member pulled out through the opening is formed in an accordion shape.

2 . The electrically heated catalyst device according to claim 1 , wherein the wiring line member is made of an annealed material having an elongation of 15% or greater.

3 . The electrically heated catalyst device according to claim 1 , further comprising a surface electrode extending in an axis direction of the catalyst support on the outer circumferential surface of the catalyst support, wherein
the wiring line member is fixed to the surface electrode, and the wiring line member comprises: a first wiring line having a comb teeth-like shape, the first wiring line extending in a circumferential direction of the catalyst support and being connected to a central part of the surface electrode in the axial direction; and a second wiring line having a comb teeth-like shape, the second wiring line extending in the axial direction from the first wiring line toward both ends of the surface electrode.

4 . The electrically heated catalyst device according to claim 3 , wherein the wiring line member is fixed to the surface electrode by a plurality of button-shaped pieces of a fixing layer, the plurality of button-shaped pieces of the fixing layer being disposed apart from each other on the first and second wiring lines.

5 . A method for manufacturing an electrically heated catalyst device in which a catalyst support supporting a catalyst thereon is electrically heated through a thin plate-like wiring line member, the method comprising:
a step of fixing the wiring line member on an outer circumferential surface of the catalyst support, a pull-out part of the wiring line member being folded in an accordion shape; a step of covering the outer circumferential surface of the catalyst support, on which the wiring line member is fixed, by a holding member for holding the catalyst support; a step of press-fitting the catalyst support covered by the holding member into an outer cylinder; and a step of extending the pull-out part, which is folded in the accordion shape, and thereby pulling out the pull-out part to the outside of the outer cylinder through an opening formed on a side of the outer cylinder.

6 . The method for manufacturing an electrically heated catalyst device according to claim 5 , wherein the wiring line member is made of an annealed material having an elongation of 15% or greater.

Assignees

• Toyota Motor Co Ltd

Inventors

• Nakayama Masao

Classifications

• B01D53/9454 Primary

  characterised by a specific device · CPC title

• F01N13/18

  Construction facilitating manufacture, assembly, or disassembly · CPC title

• F01N2350/04

  with means compensating thermal expansion · CPC title

• F01N3/2853

  using mats or gaskets between catalyst body and housing · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title