Valve for an internal combustion engine
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsKiyoshi Nakamura, Masae Nakanishi, Syozo Kawasaki, Toshihiko Ochiai, Katsutoshi Nishida
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Abstract
A valve for an internal combustion engine formed of ceramic material for resistance to corrosion, heat and wear. The valve may include a valve tip, a lock groove, a valve stem, a valve fillet, a valve face, a valve margin and a valve head. Certain portions of the valve, such as the valve tip, the lock groove and the valve stem may, alternatively, be formed of metal. The ceramic material includes, among other compositions, silicon nitride, silicon carbide, aluminum nitride, silicon oxynitride, silicon aluminum oxynitride and silicon nitride-silicon carbide.
Claims8
A valve for use in an internal combustion engine, said valve consisting essentially of ceramic material and wherein said valve further comprises a valve stem including fiber-like structure oriented along a longitudinal axis of said valve stem, said valve stem extending in the lengthwise dimension of said valve and a valve top portion including a fiber-like structure oriented so as to be substantially parallel to adjacent surface portions of said valve top portion.
Dependencies are inferred from the claim text.