Device for treating IC engine exhaust gases has heat exchanger for pre-heating exhaust gas stream using waste heat from exhaust gas stream heated by heater

摘要

A device for treating IC engine exhaust gases comprises a storage catalyst (6, 7) and a heater (4) for heating the exhaust gas stream (1) arranged in a common housing (10). A heat exchanger (2) pre-heats the exhaust gas stream using waste heat (9) from the exhaust gas stream heated by the heater. Preferred Features: The heat exchanger is arranged in the common housing. The heater is an electrical heating element or a burner. The device further includes a cooling unit (8a, 8b, 8c) with a cooling medium for cooling the catalyst. The cooling medium is either air or water.