F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F01 MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
3/00 Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
F01N3/08 for rendering innocuous
F01N3/10 by thermal or catalytic conversion of noxious components of exhaust
F01N3/18 characterised by methods of operation; Control
F01N3/20 specially adapted for catalytic conversion
F01N3/2006 Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
F01N3/2013 using electric or magnetic heating means
F01N3/2026 directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect