Valve device for internal combustion engine
AssigneeDenso Corporation
InventorsTakuji Nakamura, Hiroshi Tanimura
Life of this patent
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Abstract
A valve device for an internal combustion engine is provided with two flange portions, each of which is arranged at the outer periphery of a valve and has a larger outer diameter than a shaft. Annular valve-side end surfaces of the flange portions obstruct water flowing toward bearings and the inner surface of a cylindrical portion of a house along the surface of the shaft. Thus, water can be restricted from flowing into annular gaps between the shaft and the housing and annular gaps between the shaft and bearing members. Accordingly, water is not frozen in the annular gaps, thus restricting the shaft and the valve from freezing/sticking.
Claims10
A valve device for an internal combustion engine, comprising:
- a housing which defines an air passage communicating with a cylinder of the internal combustion engine;
- a valve which is rotatably accommodated in the air passage;
- a shaft which holds the valve;
- and
- two bearing members which respectively slideably support two axial end portions of the shaft, wherein
- at least one of the valve and the shaft has two diameter-enlarged portions which are respectively arranged at two axial end portions thereof with respect to an axially intermediate portion thereof, the two axial end portions being respectively disposed at sides of the bearing members, the diameter-enlarged portion having a larger outer diameter than that of the axially intermediate portion.
Dependencies are inferred from the claim text.