Exhaust gas after-treatment device for internal combustion engine, has flow guiding unit installed at opening in intermediate wall separating two chambers, and sensor arranged in flow channel to measure portion of exhaust gas constituent

摘要

The device has an intermediate chamber (10) separated from a discharge chamber (11) by an intermediate wall (12), where the wall includes an opening for passing a cleaned exhaust gas from the chamber (10) into the chamber (11). A flow guiding unit is installed at an opening in the wall and forms a common flow channel with a part of an outer wall (16) of a housing (6). A sensor is arranged in the channel and measures a portion of an exhaust gas constituent within the exhaust gas.