Piston for internal combustion engine, particularly for lifting cylinder machine of motor vehicle, has piston hollow unit with hollow base and intermediate portion

摘要

The piston (10') has a piston hollow unit (14) with a hollow base (16). An intermediate portion (35) is provided between a hollow neck (30) and an outer boundary region (34) of piston. A cooling duct (50) is provided, which runs in axial direction of piston below intermediate portion.