Patent ID: 8074613
Filing Date: 2011-12-13
Classification: F02B,F02D,F02M

Abstract:
1. A variable compression ratio apparatus that is mounted at an engine receiving a combustion force of an air-fuel mixture from a piston and rotating a crankshaft, and that changes compression ratio of the air-fuel mixture, comprising: a connecting rod rotatably connected to the piston so as to receive the combustion force therefrom; a pin link mounted to the crankshaft and rotatably connected to the connecting rod so as to receive the combustion force from the connecting rod and rotate the crankshaft; a connecting link rotatably coupled to the pin link and changing a rotation trace of the pin link with respect to a rotation axis of the crankshaft; an eccentric camshaft provided with first and second shaft portions eccentric from each other and configured to rotate by a predetermined angle according to a driving condition of the engine; a sub control link rotatably connected to the eccentric camshaft about the first shaft portion and rotatably connected to the connecting link; and a main control link rotatably connected to the eccentric camshaft about the second shaft portion and rotatably connected to the connecting link.