I.c. engine having cylinder banks each with a catalytic converter, one bank being shut down in part-load operation

摘要

A multi-cylinder reciprocating internal combustion engine has at least two cylinder banks, each of which is assigned an exhaust-gas line 4, 5 with a catalyst 6,7, one cylinder bank 3 being capable of being cut off when the internal combustion engine is in the part-load mode. A connecting section 8 is arranged between the exhaust-gas lines. In order, in part-load mode, to maintain the catalyst of the cut-off cylinder bank 3 at operating temperature by simple means and with a high degree of functional reliability, the connecting section 8 is arranged upstream of the catalysts 6, 7 between conduit sections 9, 10 of the exhaust-gas lines. A length-compensating element 13 is arranged in one or both of the exhaust lines 4,5 or in the connectinq section 8.