| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce negative pressure pulsation by simplifying the structure of an independent intake passage including a vacuum chamber. SOLUTION: A vacuum chamber 20 is formed between two independent intake passage 7 and 8 adjacent to each other at the center. The vacuum chamber 20 has a first vacuum chamber 21 connected to the first communication passages 21a and 21b communicated to the independent intake passages 7 and 8, and a second vacuum chamber 22b connected to the second communication passage communicated with this first vacuum chamber 21 through a check valve 23, and the second vacuum chamber 22b is provided with a negative pressure output port 24.</p> |
