Andrews Kurth Kenyon LLP
Piston for internal combustion engine
On a piston top surface, a cavity and two valve recesses are formed. On the piston top surface, a first heat insulating film is formed. However, on edge portions, a second heat insulating film different from the first heat insulating film is formed. The second heat insulating film is formed along the edge portions. The first heat insulating film is composed of porous alumina and a sealer. The second heat insulating film is composed of only porous alumina.
TOYOTA JIDOSHA KABUSHIKI KAISHA
F F F Y F
F02F F02B F02B Y02T F02B
inventional inventional additional additional inventional
Hideo
Yamashita