| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit enlargement and weight increase of an intake device provided with a negative pressure chamber and efficiently accumulate negative pressure while enabling increase of volume of the negative pressure chamber in which intake negative pressure is accumulated in an intake device for a multi-cylinder internal combustion engine. Ž<P>SOLUTION: In the intake device 10 for the multi-cylinder internal combustion engine, a chamber wall section 25a which is a part of a collecting chamber wall 22 forming an intake air collecting chamber 21 and a passage wall section 33b which is a part of a passage wall 33 forming each intake branch passage 31 communicating to each combustion space 3 construct a part of a negative pressure chamber wall 52 forming the negative pressure chamber 51 in which intake negative pressure of each intake air branch passage 31 in introduced through a negative pressure introduction hole 40 and is accumulated. The negative pressure introduction hole 40 and a one way valve 60 allowing only flow of fluid from the negative pressure chamber 51 to the intake air branch passage 31 through the negative pressure introduction hole 40 are provided on the passage wall section 33b. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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