| 摘要 |
PURPOSE: A visible piston and engine visualization system are provided to precisely check a knocking position by eccentrically forming a glass and a piston for viewing a whole area of a combustion chamber. CONSTITUTION: A cylindrical piston body(11) is formed with ring grooves on its outer surface with a center of outer diameter eccentrically formed relative to a center of inner diameter to some extent. An eccentric glass(12) has an upper end eccentrically protruded relative to a lower end inserted into the piston body from the upper side, so that a burning state of the upper side is projected onto the lower side. An upper mixer(13) is disposed opposite to the upper end of the eccentric glass to fix the eccentric glass to the piston body. A lower mixer(16) is housed in the piston body to support the lower portion of the eccentric glass. A fixing tool(17) makes the lower mixer to fix the piston body.
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