| 摘要 |
<p>A piston assembly, particularly suitable for use in a free piston internal combustion engine (10), is provided with a piston (14, 50, 62, 80, 102, 122, 140) including at least one oil coolant passage (21, 54, 72, 86, 108, 132, 142) therein. The plunger shaft (18, 64, 104, 124) is substantially rigidly attached to the piston (14, 50, 62, 80, 102, 122, 140) and axially extends from the piston (14, 50, 62, 80, 102, 122, 140). The plunger shaft (18, 64, 104, 124) includes at least one oil supply passage (22, 74, 128) fluidly connected with at least one oil coolant passage (21, 54, 72, 86, 108, 132, 142).</p> |
