| 摘要 |
<p>The invention relates to a piston for internal combustion engines mounted within some cylinders of a compression ignition engine which preferably fits out a tractor. According to the invention, the piston comprises a jacket (1) having a head (b) externally confined by some surfaces (d and e), namely an upper tapered surface and an intermediate upper surface, with angle values of 15...18 min and 10...14 min, respectively, and a skirt (a) externally confined by some surfaces (f, g, h and i), namely an intermediate upper lower tapered surface with an angle of 18...22 min, an intermediate tapered surface with an angle value of 7...11 min, a cylindrical surface and a lower tapered surface with an angle of 23...27 min, with the small base placed downwards, towards the lower parts of the jacket (1), the heights (i, i, i, i, iand i) of the surfaces (d, e, f, g, h and i) being in a relation with a length (L) of the jacket (1) given by the relations (7, 8, 9, 10, 11 and 12).</p> |
