Variable compression ratio internal combustion engine

Details Variable compression ratio internal combustion engine Variable compression ratio internal combustion engine

F - Mech Eng,Light,Heat,Weapons

01

B

F01B 31/14 (2006.01) F02D 15/04 (2006.01) F02B 75/04 (2006.01)

Patent

CA 2066196

2066196 9105142 PCTABS00004 A variable compression ratio internal combustion engine having at least one cylinder, a piston disposed in the cylinder and a cylinder head disposed at one end of the cylinder. The cylinder head has a combustion chamber and a piston chamber contiguous with the top of the cylinder. A movable piston disposed in the piston chamber to change the effective volume of the combustion chamber. A closed end of the piston chamber is connected to one of the engine's sources of pressurized fluid. A solenoid valve is disposed between the source of pressurized fluid and the piston chamber. Energization of the solenoid valve is controlled by a controller to open the solenoid valve when the combustion chamber has a low pressure to displace the movable piston to increase the compression ratio of the engine and to open the solenoid valve when the combustion chamber has a high or peak pressure to displace the movable piston to decrease the compression ratio.

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