Patent ID: 9169774
Filing Date: 2015-10-27
Classification: F02B

Abstract:
1. A variable compression ratio engine that changes a compression ratio, the engine comprising: a piston disposed to be reciprocated in a cylinder by combustion; a crankshaft rotatably disposed at a predetermined distance from the piston; a crank arm with one end connected with the piston and the other end connected with the crankshaft; a connecting rod connected with the crank arm through a crankpin and with the piston through a piston pin and having an oil chamber therein; an eccentric cam disposed between the crankpin and the connecting rod and being off-centered with respect to the crankpin; a variable piston disposed in the oil chamber to be moved by supplied oil; and a link connecting the variable piston with the eccentric cam to rotate the eccentric cam with movement of the variable piston.