| 摘要 |
<p>A rotary valve for an internal combustion engine includes a cylindrical valve rotor having an inlet and an outlet port arranged in the circumferential surface thereof, and a plurality of sealing elements mounted on the valve rotor such as to subdivide the circumferential surface of the rotor body to define discrete circumferential surface zones thereon, a predetermined one of the discrete surface zones being arranged such that, when the rotary valve is received within a valve bore in a cylinder head of an engine and the sealing elements of the rotary valve abut on the valve bore surface, it periodically seals-off a transfer port in the cylinder head, for which the rotary valve serves as closing and opening, during at least part of the compression and combustion strokes performed in the engine, whereby air-fuel mixture compressed during the compression stroke and combustion gases created during combustion stroke are substantially prevented from passing into the inlet or outlet port of the valve during these strokes.</p> |
