| 摘要 |
A one-piece steel piston that is made from a piston blank that includes a portion that is configured and designed to be displaced to form a cooling gallery and ring belt. The piston blank can be formed by a casting or forging process. The portion that is designed and configured to be displaced is a flange that extends radially outward. The flange is bent downward or upward so that a peripheral edge of the flange contacts another portion of the piston. The peripheral edge of the flange and the other portion of the piston can be welded together or mechanically engaged. |
