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 (electric control F01N9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00) > for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N3/01 ) > by means of filters > having means for by-passing filters, e.g. when clogged or during cold engine start

Child Classifications

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• F01N 3/032 during filter regeneration only