| 主权项 |
1. A method of assembling a piston, comprising:
providing a crown having an upper combustion bowl surface and a ring belt portion disposed about the combustion bowl, the crown defining an upper cooling gallery surface, a radially outer crown support surface, and a radially inner crown support surface, the crown having an axial support extending away from the combustion bowl, the axial support having a first diameter and a second diameter larger than the first diameter, the radially inner and outer crown support surfaces being spaced radially away from the axial support; inserting the first diameter of the axial support into an aperture of a skirt such that the second diameter of the axial support is supported in the skirt on a side of the aperture opposite the crown, the skirt defining a lower cooling gallery surface cooperating with the upper cooling gallery surface to define at least in part a cooling gallery extending about a perimeter of the piston, the skirt defining radially inner and outer skirt support surfaces; abutting the radially inner skirt support surface against the radially inner crown support surface to define a radially inner preload; abutting the radially outer skirt support surface against the radially outer crown support surface to define a radially outer preload; and deforming an end portion of the axial support to facilitate the abuttings. |
