Variable compression ratio device and internal combustion engine using the same
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorMyungsik Choi
Life of this patent
Estimating the term…
Abstract
A variable compression ratio device and an internal combustion engine are disclosed. The variable compression ratio device includes a main piston that moves in a reciprocating manner, a main combustion chamber having a volume that is varied by the main piston, a sub-compression chamber communicating with the main combustion chamber; a sub-piston configured to reciprocate in the sub-compression chamber to vary a volume of the sub-compression chamber; and a sub-piston reciprocating unit that reciprocates the sub-piston. Accordingly, the air-fuel ratio and output of the internal combustion engine can be improved.
Claims7
A variable compression ratio device comprising:
- a main piston that moves in a reciprocating manner;
- a main combustion chamber, a volume thereof is varied by the main piston;
- a sub-compression chamber communicating with the main combustion chamber;
- a sub-piston configured to reciprocate in the sub-compression chamber to vary a volume of the sub-compression chamber;
- and
- a sub-piston reciprocating unit that reciprocates the sub-piston,
- wherein the sub-piston reciprocating unit comprises:
- a connecting rod one end thereof is connected to the sub-piston;
- an eccentric cam coupled to the other end of the connecting rod;
- and
- a rotating unit that rotates the eccentric cam,
- wherein the eccentric cam is of a circular shape, and
- wherein an eccentric rotary shaft is provided in the eccentric cam to rotatably connect the eccentric cam to the rotating unit.
Dependencies are inferred from the claim text.