Exhaust gas purification device for an internal combustion engine with a cooling unit and method of operation

摘要

Internal combustion (IC) engine exhaust gas purification device comprises a catalyst, a nitrogen oxide storage unit and an exhaust gas cooling unit for regulating the temperature of the exhaust gas stream flowing through the storage unit by blowing in additional air. An Independent claim is also included for a process for operating an I.C. engine exhaust gas purification device.