AN EXHAUST VALVE FOR AN INTERNAL COMBUSTION ENGINE

摘要

PURPOSE: An exhaust valve is provided to include a movable spindle with a valve disc having a circular shaped seat of different material from a base material on the upper surface of the valve disc. CONSTITUTION: 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 are 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°C.