Disconnectable heat exchanger

摘要

A heating exchanger ( 10 ) between a cooling conduit and an exhaust-gas line of an internal combustion engine includes a coolant inflow ( 26 ) and a coolant return ( 28 ) for coolant ducts ( 14 ), as well as an exhaust-gas inlet ( 30 ) and an exhaust-gas outlet ( 32 ) for exhaust-air ducts ( 36 ). The heat exchanger is arranged in a main exhaust-gas flow ( 34 ), and a shutoff device is provided in the coolant inflow ( 26 ).