| 摘要 |
The present invention relates to a piston of an internal combustion engine. The piston comprises piston upper and lower parts (10, 11); a piston pin (12) which is mounted on the piston lower part (11) and connects the piston to a connecting rod (13) of the internal combustion engine; an inner cooling chamber (15) formed between the piston upper and lower parts (10, 11) to cool the piston; and a cooling oil guide sleeve (19). The inner cooling chamber is connected to an outer cooling chamber (16) formed between the piston upper and lower parts (10, 11) through one or more delivery bores (17). The cooling oil guide sleeve guides cooling oil from the connecting rod (13) through a bore (18). One or more bores (21) are provided in the piston lower part (11), and the bore interacts with the cooling oil guide sleeve (19) in order that the cooling oil guided through the connecting rod (13) and the cooling oil guide sleeve (19) is directly supplied to the outer cooling chamber (16). |
