Internal-combustion engines – Adjustable combustion chamber – Piston in head adjusted
Patent
1989-09-28
1991-01-29
Okonsky, David A.
Internal-combustion engines
Adjustable combustion chamber
Piston in head adjusted
F02B 7504
Patent
active
049878638
ABSTRACT:
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 source 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.
REFERENCES:
patent: 2758582 (1956-08-01), Humphreys
patent: 2883974 (1959-04-01), Heising
patent: 4187808 (1980-02-01), Audoux
patent: 4516537 (1985-05-01), Nakahara et al.
patent: 4827882 (1989-05-01), Paul et al.
Boller George L.
Okonsky David A.
Siemens-Bendix Automotive Electronics L.P.
Wells Russel C.
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