F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Load children
F01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
Load children
F01N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
Load children
3/00
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
Load children Filter patents View analytics View as hierarchy
F01N3/10
by thermal or catalytic conversion of noxious components of exhaust
Load children Filter patents View analytics View as hierarchy
F01N3/18
characterised by methods of operation; Control
Load children Filter patents View analytics View as hierarchy
F01N3/22
Control of additional air supply only, e.g. using by-passes or variable air pump drives
Load children Filter patents View analytics View as hierarchy
F01N3/225
Electric control of additional air supply
Filter patents View analytics View as hierarchy