Exhaust gas control apparatus for internal combustion engine

Patent metadata

Field	Value
Publication number	US-10823028-B2
Application number	US-201916714096-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	Oct 17, 2017
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

An exhaust gas control apparatus for an internal combustion engine includes an outer tube, a downstream side catalyst held in the outer tube via a first mat, and an electric heating catalyst held in the outer tube via a second mat upstream of the downstream side catalyst. A joint of the first mat is disposed in a place other than a vertically lowermost portion.

First claim

What is claimed is:

1. An exhaust gas control apparatus disposed on an exhaust passage of an internal combustion engine and configured to control exhaust gas, the exhaust gas control apparatus comprising:
an outer tube having an electrical insulation property connected to an exhaust pipe having an electrical conductive property;
an electric heating catalyst positioned inside the outer tube; and
a downstream side catalyst arranged downstream of the electric heating catalyst in an exhaust flow direction in the outer tube, the downstream side catalyst being held inside the outer tube via a first mat having an electrical insulation property,
wherein a joint of the first mat is disposed in a position other than a vertically lowermost portion of the first mat in the outer tube.

2. The exhaust gas control apparatus according to claim 1 , wherein the joint of the first mat is disposed in a position other than a vertically lower portion that is positioned below the downstream side catalyst.

3. The exhaust gas control apparatus according to claim 1 , wherein the joint of the first mat is disposed in a vertically uppermost portion of the first mat in the outer tube.

Assignees

• Toyota Motor Co Ltd

Inventors

• Korenaga Shingo

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01N3/2853

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

• F01N3/2842 Primary

  specially adapted for monolithic supports, e.g. of honeycomb type (F01N3/2853 - F01N3/2871 take precedence) · CPC title

• F01N13/1805

  Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body (pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K) · CPC title

• F01N3/2867

  the mats or gaskets being placed at the front or end face of catalyst body · CPC title