| 摘要 |
The invention relates to an internal combustion engine, in particular a multifuel large diesel internal combustion engine, comprising a SCR catalytic converter (1) that can be bypassed, at least one control element (8, 9) for switching the flow in an exhaust gas line (11) between a first position that activates the SCR catalytic converter (1) and a second position that bypasses the SCR catalytic converter (1), and at least one flow path (S2) that bypasses the SCR catalytic converter (1). According to the invention, to avoid unacceptable contamination or even destruction of the SCR catalytic converter (1) in high-load engine operating modes in a simple and space-saving manner, the flow path (S2) that bypasses the SCR catalytic converter (1) is formed as an annular space (5) between two preferably coaxial, concentric pipes (3, 4), wherein the SCR catalytic converter (1) is accommodated by the inner pipe (3), and wherein a first supply pipe (6) leads to the inner pipe (3) and a second supply pipe (7) leads to the bypassing flow path (S2). |
