| 摘要 |
<p>A piston for an internal combustion engine, for high speed Diesel engines used in passenger or light load cars, comprising a single piece made from an alloy with a density which is lower than about 3g/cm3 and a yield stress which is higher than about 120 MPa at temperatures of about 300 °C to 350 °C and having: a height (H) of 4 - 8 mm for the burning zone defined between the piston upper face and the uppermost peripheral groove (13); a thickness (E) for the bottom wall (12) of the combustion chamber (11) corresponding to 5 - 9 % of the piston diameter (D); and a projected bearing area by which the piston is supported on the wrist pin equal to twice the product of the diameter (D) of the hole (31), for bearing the wrist pin, by the axial extension (L) of said hole (31) and corresponding to 7 - 14 % of the square of the piston diameter (D).</p> |
