Piston for variable compression ratio cylindrical internal combustion engine, has pressure medium inlet and outlet fluidly connected with volume variable chambers, and switchable valve device switchable between two switching positions

摘要

The piston (10) has two piston parts (12, 14) movably coupled relative to each other and connected with a pressure medium i.e. pressurized fluid. Two volume variable chambers (16, 18) are relatively and movably coupled with each other and fluidly interconnected via a throttle unit (24). A pressure medium inlet (28) is fluidically connected to the volume variable chamber in first switching position. A pressure medium outlet (36) is fluidly connected with the volume variable chamber in second switching position, where a switchable valve device is switchable between the switching positions.