Hunton Andrews Kurth LLP
Internal combustion engine
A heat shield film is formed on a bottom surface of a cylinder head and a heat shield film is formed on an inner peripheral surface of a small diameter hole portion. The film is a thermal spraying film made from the same film material. Since the film is thicker than the film, the film has higher thermal capacity than the film and thus heat retaining effect of the film is higher than that of the film. Therefore, combustion gas generated in a combustion chamber is suppressed to lose its momentum around the portion. Even if the combustion gas goes off around the portion, excessive temperature decrease of the combustion gas in the portion is suppressed.
TOYOTA JIDOSHA KABUSHIKI KAISHA
F F F F F
F05C F02F F02B F02F F02B
additional inventional inventional inventional inventional
Akio Hideo Hiroki
Kawaguchi Yamashita Iguma