| 摘要 |
PURPOSE: An articulated piston cooling structure of a diesel engine is provided to reduce the number of parts and assembling process by forming the oil gallery with the insertion end formed on the skirt part without a cooling ring, and to improve cooling efficiency of the piston by restricting increase of temperature of oil with increasing heat transfer from the crown part to the skirt part. CONSTITUTION: A round groove(14) is formed in the lower part of a steel crown part(10), and an aluminum skirt part(20) is combined with the lower part of the crown part in an articulated piston of a diesel engine. An insertion end(22) is formed in the upper part of the skirt part, and press-fitted to the round groove. An oil gallery(40) is formed by closing the round groove with the insertion end. An oil supply hole(21) and an oil discharge hole are formed in the skirt part, and communicated with the oil gallery.
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