Piston for an internal combustion engine

Details Piston for an internal combustion engine Piston for an internal combustion engine

1999-03-12

2000-12-26

Wolfe, Willis R.

Internal-combustion engines

Cooling

Internal cooling of moving parts; e.g., hollow valves,...

F01P 104

Patent

active

061642495

ABSTRACT:
In a piston for an internal combustion engine, which includes in its top an annular cooling oil passage which, at one side of the piston, is in communication with a cooling oil supply passage extending axially through the piston and has a bottom opening through which cooling oil is supplied by an injection nozzle, and, opposite the cooling oil supply passage, a cooling oil return passage in communication with the annular cooling oil passage for removing the cooling oil therefrom, at least the cooling oil supply passage includes cooling oil retaining pockets which retain, during outward movement of the piston, part of the cooling oil supplied to the cooling oil supply passage and from which the retained cooling oil is dislodged and moved to the annular cooling oil passage during inward movement of the piston.

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