VARIABLE COMPRESSION RATIO DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To prevent generation of micro-vibration of a rod 33 caused by an alternating load in an engine high speed area and a hitting sound caused by this vibration, without hindering operational responsiveness of an actuator mechanism 31. SOLUTION: This variable compression ratio device has a variable compression ratio mechanism capable of varying the engine compression ratio by causing a change in a top dead center position of a piston for reciprocating in a cylinder, and an actuator mechanism 31 for driving the variable compression ratio mechanism by causing the movement in the axial direction of the rod 33. A plunger 72 of a stopper mechanism 70 abuts on the rod 33 only under a setting condition of the engine compression ratio used in the engine high speed area, and restrains the micro-vibration of the rod 33. COPYRIGHT: (C)2006,JPO&NCIPI