知搜-全球专利检索

  1. 登录
  2. 注册
发明授权
CN105705759B 内燃机 有权

内燃机
摘要：
本发明涉及一种内燃机。本发明的一个目的在于在抑制燃烧速率降低的同时允许获得由阳极氧化物膜所产生的效果。活塞10包括腔体部分20和锥形部分26，所述锥形部分26形成为在腔体部分20的外侧包围所述腔体部分。锥形部分26的直径从活塞的顶面侧沿着向下的方向逐渐减小。在锥形部分26的外侧上形成有挤压部分28。在锥形部分26的表面(锥面)和挤压部分28的表面(挤压面)上形成有阳极氧化物膜30。在腔体部分20的表面(腔面)上没有形成阳极氧化物膜30。
摘要（英）：

The present invention relates to an internal combustion engine. An object of the invention is to allow an effect produced by an anodic oxide film to be exerted while suppressing a decrease in the combustion rate. A piston 10 includes a cavity portion 20 and a tapered portion 26 that is formed so as to surround the cavity portion 20 on an outer side thereof. The diameter of the tapered portion 26 decreases progressively in the downward direction from the top face side of the piston. A squish portion 28 is formed on an outer side of the tapered portion 26. An anodic oxide film 30 is formed on a surface (tapered face) of the tapered portion 26 and a surface (squish face) of the squish portion 28. The anodic oxide film 30 is not formed on the surface (cavity face) of the cavity portion 20.

公开/授权文献
0/0