Muffler arrangement for an internal combustion engine

摘要

A muffler arrangement includes an exhaust-gas muffler (4), which is subdivided into an inlet space (9) and an outlet space (10). An exhaust-gas stub (3) of an internal combustion engine (1) opens into the inlet space (9). Exhaust gas is conducted from the outlet space (10) into an air channel (15) via an exhaust-gas outlet (12). The air channel (15) is formed between the housing (4c) of the exhaust-gas muffler (4) and an outer cover (16) and extends along a side of the exhaust-gas muffler (4). A cooling-air component flow (18) is branched from a cooling-air flow of a cooling-air blower (5) and enters at a first end (25) of the air channel (15). The cooling-air component flow (18) exits again at the other second end (35) of the air channel (15). In order to reduce the discharge temperature of the exhaust gas (especially with the arrangement of a catalytic converter), it is provided that the exhaust-gas jet (14) is conducted in the air channel (15) in spaced relationship (distance (b)) to the air channel walls (21) and is essentially surrounded on its path to the air channel outlet window (36) by the supplied cooling-air component flow (18) in such way that the exhaust-gas jet (15) forms a core flow and the cooling-air component flow (18) forms a cover flow surrounding the core flow.