VARIABLE ROLLER VALVE SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

A variable roller valve system for use in an internal combustion engine. A Sliding Iris feature provides separate, independent, and continuous control over the aperture sizes of the intake and exhaust valve ports while the engine is running. The valve apertures are constricted and enlarged in a reciprocating motion along the longitudinal axis of the valve rollers so as not to disrupt valve duration. At the same time, and also while the engine is running, hydraulic mechanisms provide separate, independent and continuous control over the relative timing phases of the intake valve train and the exhaust valve train with respect to the crankshaft. As a result, combustion efficiency can be optimized and noxious exhaust emissions can be minimized over a wide range of engine operating speeds and power demands.