Title: Exhaust valve for internal combustion engine
Application Number: 97195324 Application Date: 1997.06.03
Publication Number: 1221473 Publication Date: 1999.06.30
Approval Pub. Date: 2002.07.24 Granted Pub. Date: 2002.07.24
International Classifi-cation: C22F1/10;F01L3/02;F01L3/04
Applicant(s) Name: Man B Address:
Inventor(s) Name: Harvo Andreas Hoeg
Attorney & Agent: ma jiangli
Abstract:
    An exhaust valve for an internal combustion engine comprises a movable spindle with a valve disc which on its upper surface has an annular seat area is of a material different from the base material of the valve disc. In the closed position of the valve the seat area abuts a corresponding seat area on a stationary valve member. The seat area on the upper surface of the valve disc is made of a material which has a yield strength (Rp0.2) of at least 1000 Mpa at a temperature of approximately 20 DEG C.
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