Patent ID: 8499725
Filing Date: 2013-08-06
Classification: F02B

Abstract:
1. A variable compression ratio apparatus which is mounted at an engine receiving combustion force of an air-fuel mixture from a piston and rotating a crankshaft, and which changes compression ratio of the air-fuel mixture, the variable compression ratio apparatus comprising: a connecting rod provided with one end formed of a mounting hole and the other end eccentrically and rotatably connected to the crankshaft, wherein a piston pin is inserted in the mounting hole and the one end of the connecting rod is rotatably connected to the piston through the piston pin; an eccentric link provided with one end to which an eccentric bearing concentrically and rotatably mounted in the mounting hole is connected and the other end, the piston pin being eccentrically and rotatably mounted in the eccentric bearing; a variable link provided with one end rotatably connected to the other end of the eccentric link and the other end; a variable gear link configured to pivot with respect to a fixed shaft and formed of a first gear teeth at an exterior circumference thereof, an external circumferential portion thereof being rotatably connected to the other end of the variable link; and a control shaft formed of a second gear teeth engaged to the first gear teeth at an exterior circumference thereof and rotating so as to selectively pivot the variable gear link.