| 摘要 |
The invention relates to a piston (1) for an internal combustion engine comprising piston-pin bores (5, 6), into which lubrication grooves (8, 9) that run around the nadir and equator zones of said bores are machined. The aim of the invention, is to simplify the production of the piston-pin bores (5, 6) provided with said lubrication grooves (8, 9). To achieve this, each of the lubrication grooves (8, 9) has a central region (10, 10'), whose groove base has a depth of less than 100 mum. Said central region is flanked by groove areas (13, 13', 15, 15') facing towards the interior and exterior of the piston. The bases of said grooves are inclined towards the longitudinal axis (12), each forming an acute angle with the longitudinal axis of the piston-pin bore (5, 6).
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