| 摘要 |
A valve seal for a rotary valve assembly for use in an internal combustion engine of the piston and cylinder type, wherein the cylinder head/combustion chamber is designed for high compression and of long stroke, such as a diese l engine, the rotary valves and the valve seals being positioned in relationsh ip so as to permit charging of the cylinder with a fuel/air mixture and evacuation of spent gases, and to regulate the pressure within the valve sea l and valve seat and hence regulate the pressure between the valve seal and th e rotary valve. |
