Patent ID: 6321699
Filing Date: 2001-11-27
Classification: F01L

Abstract:
In a spheroidally surfaced rotary valve for controlling gas flows to and from a cylinder of an internal combustion engine, a valve casing attached to said cylinder, a valve rotor supported on an oil film against a shaft within said casing, a port defined by said casing and providing gas flow connection between the cylinder and the rotor surface such that cyclic gas pressure from the cylinder acting on the rotor surface produces cyclic force against the rotor which are counteracted by said oil film, a means for metering oil lubrication to said rotor in correlation with said cyclic gas pressures comprising:means providing for an oil feed to maintain said oil film,means providing for release of oil from said oil film during periods of high pressure created by said cyclic forces acting on said rotor, andmeans providing for transfer of said released oil to the surface of said rotor.