EXHAUST GAS JOULE HEATER
An exhaust gas heater comprising an electrically conductive metallic track hosted on an electrically insulating substrate through which an exhaust gas can flow.
1 . An exhaust gas heater comprising an electrically conductive metallic track hosted on an electrically insulating substrate through which an exhaust gas can flow.
2 . The exhaust gas heater of claim 1 , wherein the substrate has a tubular shape.
3 . The exhaust gas heater of claim 1 , wherein the substrate has a cylindrical shape.
4 . The exhaust gas heater of claim 1 , wherein the substrate comprises a plurality of channels extending through the substrate.
5 . The exhaust gas heater of claim 1 , wherein the substrate comprises a honeycomb monolith.
6 . The exhaust gas heater of claim 1 , wherein the substrate comprises a filter.
7 . The exhaust gas heater of claim 1 , wherein the metallic track comprises metal on an inlet end surface of the substrate.
8 . The exhaust gas heater of claim 1 , wherein the metallic track comprises metal on an outlet end surface of the substrate.
9 . The exhaust gas heater of claim 1 , wherein the metallic track comprises an electrically conductive metal or metal alloy.
10 . The exhaust gas heater of claim 1 , wherein the metallic track comprises silver, gold, platinum, rhodium, ruthenium, iron, chromium, titanium or an alloy of one or more thereof.
11 . The exhaust gas heater of claim 1 , wherein the metallic track comprises silver.
12 . The exhaust gas heater of claim 1 , wherein the metallic track comprises silver and nichrome.
13 . The exhaust gas heater of claim 1 , wherein the metallic track comprises silver and stainless steel.
14 . The exhaust gas heater of claim 1 , wherein the metallic track comprises metal within a trench in an end surface of the substrate.
15 . The exhaust gas heater of claim 14 , wherein the metal is coated into the trench.
16 . The exhaust gas heater of claim 8 , wherein the heater includes connectors linking the metal to an electrical power supply.
17 . The exhaust gas heater of claim 1 , wherein the substrate comprises a catalytic material.
18 . The exhaust gas heater of claim 17 , wherein the catalytic material comprises a lean NO catalyst (LNC), a selective catalytic reduction (SCR) catalyst, a diesel oxidation catalyst (DOC), an ammonia slip catalyst (ASC), a cold start catalyst (dCSC), a three-way catalyst (TWC), or combinations thereof.
19 . An apparatus for the catalytic treatment of exhaust gas from an internal combustion engine comprising:
a. a casing having an exhaust gas inlet and a treated exhaust gas outlet; and
b. a heater disposed within the casing, through which the exhaust gas can flow;
wherein the heater comprises an electrically conductive metallic track hosted on an electrically insulating substrate.
20 . A vehicle comprising an internal combustion engine and an apparatus for the catalytic treatment of exhaust gas from the internal combustion engine, which apparatus comprises:
a. a casing having an exhaust gas inlet and a treated exhaust gas outlet; and
b. a heater disposed within the casing, through which the exhaust gas can flow;
wherein the heater comprises an electrically conductive metallic track hosted on an electrically insulating substrate.