LIGHTWEIGHT COMPOSITE ENGINE VALVE

摘要

A composite intake or exhaust valve for an internal combustion engine is disclosed. The composite engine valve comprises a valve head of lightweight, heat resistant metal alloy material and a valve stem of lightweight, heat resistant ceramic based material. The valve head has an integral valve head insert around which the valve stem is molded to integrate the valve head and valve stem into a composite valve. The valve head insert is provided with anti-rotation means to prevent rotation of the valve head relative to the valve stem during use. The valve head insert is also provided with anti-tension means to prevent separation of the valve head from the valve stem during use.