| 摘要 |
PROBLEM TO BE SOLVED: To simplify the structure of bearing parts and facilitate assembly. SOLUTION: The intake system of an internal-combustion engine has a flange area 12 with a first inlet channel 13 and a second inlet channel 14 for each cylinder, and a flap valve device for closing the second inlet channel 14 arranged in the flange area. The flap valve device is equipped with a changeover shaft 15, which is furnished with a flap valve 33 for closing the first inlet channel 14 when the shaft is operated. The shaft 15 is mounted on the corresponding bearing member 16, which is fitted in a bearing member mounting part 18 of the flange member 12, and the changeover shaft 15 is installed in the flange area 12 of the intake system 10. The changeover shaft 15 is covered with the individual bearing members 16 over an angular range of substantially greater than 180°. COPYRIGHT: (C)2006,JPO&NCIPI
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