Reduction device for reducing gas pressure in the piston ring package of a hydraulic piston combustion engine

摘要

The device has a piston (2) provided with a piston crown (23) that faces a combustion chamber (3) of a reciprocating piston engine. The piston interacts with a scraping apparatus (5) for removing combustion residue (6) from a cylindrical wall (41) of a cylinder (4). The scraping apparatus adjusts a piston-ring packet to an upward direction. The piston crown is expanded to the combustion chamber, and a recess (100) is provided in the scraping apparatus, where the recess is formed in connection with a longitudinal axis.