Internal combustion engine for decreasing intake air noise has inlet pipe arrangement for at least two cylinders wherein inlet pipe has different lengths for two cylinders

摘要

The internal combustion engine (10) has inlet pipe arrangement (20) for at least two cylinders (1,2,3,4). The inlet pipe (5,6,7,8) has different lengths for two cylinders. The first inlet pipe is guided towards one cylinder and the second inlet pipe to another cylinder. The second inlet pipe is longer about 5 percent, preferably 10 percent, then the first inlet pipe.