Patent ID: 6085714
Filing Date: 2000-07-11
Classification: C04B,F01L,F05C,Y10T

Abstract:
A carbon--carbon (C/C) composite valve for high temperature internal combustion engines comprising:an elongated cylindrical carbon--carbon (C/C) composite valve stem having a flared end and a non-flared end opposite said flared end, wherein the carbon--carbon (C/C) composite valve stem has a substantially uniform fiber/matrix density in both the flared end and the non-flared end;a valve head comprising a plurality of substantially circular carbon--carbon (C/C) fabric plies;wherein said plies are in intimate reinforcing contact with the flared end of the elongated cylindrical carbon--carbon (C/C) composite valve stem; andwherein at least one of said carbon--carbon (C/C) composite valve stem and valve head is coated with a high temperature resistant coating having a inner layer and an outer layer.