| 摘要 |
PROBLEM TO BE SOLVED: To reduce noise in an intake system for an internal combustion engine.SOLUTION: An intake system includes: a casing 50 composed of a body 51 and a lid member 52 and having a space formed inside; a partition member 53 that partitions the space inside the casing 50 into a dirty side 56 in which a dirty side chamber 561 and an introduction channel 562 are formed, and a clean side 57 in which a clean side chamber 571 is formed, and an intake portion 523 that takes air into the dirty side 56 from an outside of the casing 50. In the dirty side 56, a bulkhead portion 58 that extends along a part of a sidewall portion 522 of the casing 50 from the intake portion 523 to form the introduction channel 562 between the bulkhead portion and the part of the sidewall portion 522 is formed; and a communication hole 525 is formed midway in an extending direction of the bulkhead portion 58, for communicating the introduction channel 562 with the dirty side chamber 561 to allow air to circulate. |
