Exhaust system closely coupling catalyst to engine

摘要

A porous, refractory static mixer (7) is located between catalyst (8) and exhaust manifold (2) of the engine. Preferred features: The mixer is ceramic foam. It also has channels, angled with respect to the principal direction of through-flow. A second set of channels, is angled both with respect to the first, and with respect to the principal flow direction. First or second channels are each arranged in at least one row, the rows alternately lie adjacent and parallel. The mixer is cylindrical, the channels extending from top to bottom. The mixer is located immediately ahead of the catalyst body (4). It is arranged inside a catalyst casing (6). Mixer and catalyst directly follow the manifold (2).