having means for by-passing filters, e.g. when clogged or during cold engine start

Full Title

Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust > for cooling, or for removing solid constituents of, exhaust > by means of filters > having means for by-passing filters, e.g. when clogged or during cold engine start

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES

Subclass:

GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES

Child Classifications

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• F01N 3/032 during filter regeneration only