Air distribution system for reduction catalyst and oxidation catalyst

摘要

An internal combustion engine with an exhaust line in which are arranged a reduction catalyst and downstream thereof an oxidation catalyst, whereby during the starting phase of the internal combustion engine, additional air is supplied to the reduction catalyst, and in the operationally warmed-up condition of the internal combustion engine, additional air is supplied to the oxidation catalyst while at the same time a part of the additional air continues to be fed to the reduction catalyst.