A lubricant-cooled and wristpin lubricating piston

Details A lubricant-cooled and wristpin lubricating piston A lubricant-cooled and wristpin lubricating piston

F - Mech Eng,Light,Heat,Weapons

02

F

F02F 3/16 (2006.01) F02F 3/22 (2006.01)

Patent

CA 2625901

A piston for an internal combustion engine, the engine having a connecting rod coupled to a wristpin, the wristpin being connected to the piston for pivotal movement about an axis, the piston comprising: a top portion and a generally cylindrically- shaped wall portion extending from the top portion, the top and wall portions defining a skirt cavity, the top portion having thereon a downwardly extending projection with a downwardly facing bearing surface for the wristpin, the bearing surface extending in the direction of the axis and defining a portion of a cylinder centered on the axis, and the projection having opposite sides facing the skirt cavity; at least one lubricant passage extending through the projection from one of the opposite sides and over the bearing surface to the other of the opposite sides; and a lubricant opening communicating between the lubricant passage and the bearing surface to supply lubricant to the bearing surface and to the wristpin.

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