Pressure reactive piston for reciprocating internal combustion engine.

摘要

A pressure reactive piston (10) for an internal combustion engine includes an axially directed central bore (46) formed within a piston ring portion (38) of the piston, which houses a slidably mounted crown (50) which cooperates with the central bore to define a gas chamber (60) which is closed off from the environment by means of a flexible gas seal (64), such as a metallic bellow, interposed between the crown and the ring portion of the piston. The gas chamber (60) may also include a cooling medium selected so as to change phase during operation.