| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve device in a cantilever structure that is configured to open and close an EGR passage through which exhaust gas from an internal combustion engine passes, and comprises lower-cost bearing means 5.SOLUTION: For bearing means 5, use of a metal bearing with high accuracy is abolished. The bearing means 5 is constituted of two rolling bearings 13 arranged in series in the axial direction. Functional damage of the bearing means 5 is inhibited by accommodating an outer ring 16 of one rolling bearing 13 on the passage side in a bearing hole 6 by interference fit and accommodating an outer ring 16 of the other rolling bearing 13 on the opposite side to the passage in the bearing hole 6 by stop fit or clearance fit. Consequently, for the bearing means 5, its performance at the same level as or higher than that of the conventional ones is ensured and cost reduction is achieved. |
