| 摘要 |
<p>A piston (10; 100) containing a cavity (12) is manufactured by forming an inner crown portion (30; 106) by which a combustion recess (14) of the piston is defined, and forming an outer crown portion (40; 104). The outer crown portion (40; 104) is fitted around the inner crown portion (30; 106) with an inner side surface (46; 112) of the outer crown portion overlying an outer side surface (34; 122) of the inner crown portion, said cavity being formed by a recess formed in at least one of said side surfaces (34, 46; 112, 122).</p> |
