| 摘要 |
<p>A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. At least one of the pistons 202, 220 includes one or more generally axially extending bores 212, 213; 230, 231 partially filled with a sodium compound 215, 217. As each piston 202, 220 reciprocates, the sodium 215, 217 moves back and forth in each cooling bore 212, 213; 230, 231 thereby better distributing heat in the piston 202,220.</p> |
