Lubrication system for the piston ring and cylinder liner of an internal combustion engine
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United States of America Patent
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Nov 1, 2016
Grant Date -
Mar 4, 2010
app pub date -
Aug 27, 2009
filing date -
Aug 27, 2008
priority date (Note) -
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Abstract
A disclosed lubrication system for an internal combustion engine includes an inertia reactive oil injector in a piston that reacts to convey lubricating oil to the space between the piston and its adjacent cylinder wall immediately below the upper piston rings as the piston reaches top dead center. A first embodiment utilizes a passage and reservoir formed beneath the piston wall with inlet and outlet ports at each end. The oil injector carries the oil past the intake/exhaust ports of the cylinder until the piston decelerates while approaching its TDC position. During that deceleration, the oil carried by the injector reservoir is delivered through the outlet port into the space between the piston and the cylinder liner. A second embodiment utilizes a groove of predetermined length formed in the outer surface of the piston. A reservoir is formed in the groove and defines inlet and outlet ports at each end.
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