Device for changing a compression ratio of a cylinder unit of a reciprocating piston combustion engine

The invention relates to a device for changing a compression ratio of a cylinder unit of a reciprocating piston combustion engine, comprising an eccentric bush (51) which is rotatably arranged in a receiving bore hole (50) of a conrod bearing eye (49) of a conrod (45), said conrod bearing eye being formed by a conrod upper part (46) and a conrod lower part (47), and which surrounds a crankpin of a crankshaft. In addition, the eccentric bush (51), rotatably guided in the receiving bore hole (50), can be locked preferably in two positions which are offset from one another by preferably approximately 180deg c in the circumferential direction of the eccentric bush (51). In order to achieve a targeted rotation of the eccentric bush in the bore hole of the conrod bearing eye between the locking positions, a freewheel (29) should be arranged between an outer casing surface (53) of the eccentric bush (51) and the receiving bore hole (50) of the conrod bearing eye (49). 本发明涉及种用于改变往复活塞式内燃机的气缸单元的压缩比的设备，其具有偏心套筒(51)，所述偏心套