| 摘要 |
The invention relates to a multi-part cooled piston (20) for an internal combustion engine, said piston comprising a steel piston upper part (1) provided with a combustion cavity (3) and an annular wall (4) having an annular part (11), in addition to a piston lower part (2) comprising a piston shaft (9), hubs (12) for receiving the piston pin connecting the piston (20) to the connecting rod, and hub supports (6) connected to the piston shaft (9). The aim of the invention is to produce one such piston with good dimensional stability in a cost-effective manner. To this end, a cooling channel (7) formed inside the piston upper part (1) comprises bore holes (14) distributed about the circumference thereof and oriented towards the bottom of the piston, the piston material located between the bore holes (14) forming support ribs (8) which respectively form sections of a surrounding annular rib (5), radially in relation to the longitudinal axis (K) of the piston; the lower part (2) of the piston comprises a surrounding carrier rib (10) which is connected to the hub supports (6) and has a contact surface; the piston upper part (1) and the piston lower part (2) are interconnected in a fixed manner by means of the contact surfaces of the annular rib and the carrier rib (5, 10); and the cooling channel (7) can be closed by means of a cooling channel cover (13). |
