| 摘要 |
An oil inlet ( 2 ) for a piston ( 1 ) provided with a cooling duct ( 4 ) and installed in an internal combustion engine is designed in order to enable an improved concentration of a cooling oil stream when entering the oil inlet and an improved distribution when exiting into the cooling duct. To this end, the inner wall surface ( 3 ) of the oil inlet ( 2 ) is shaped according to a function of a one-sheeted rotating hyperboloid or of a surface-delimited torus, whereby the shape is determined according to a stream position of the cooling oil stream ( 7 ), which is produced by an oil spraying nozzle ( 6 ), relative to the cross sectional opening area (B, D) of the oil inlet.
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