Piston for an internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 5, 2000
Grant Date -
N/A
app pub date -
Mar 19, 1999
filing date -
Jun 14, 1996
priority date (Note) -
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Abstract
A piston which has a diameter of about 70 to about 100 mm and which is preferably produced with a resistant, malleable alloy having low density (lower than about 3 g/cm.sup.3) and mechanical properties at high temperatures such that a yield stress greater than about 120 Mpa at temperatures of the order of 300.degree. C. to 350.degree. C. is obtained. In the preferred embodiment, the piston is a single piece piston, comprising a head portion of diameter D ranging from about 70 to about 100 mm and a skirt portion downwardly projected from the head portion and inside which is provided a pair of wrist pin bosses, each having a hole with a diameter d and axial extension L for bearing the articulating wrist pin of the piston. The embodiment described improves the efficiency that the piston gives to the engine because it maintains the piston resistance at high levels while reducing its weight such that the piston operates at a rate of at least about 17 grams of weight per each kilowatt of power for each engine cylinder.
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