Engine with variable compression ratio

Details Engine with variable compression ratio Engine with variable compression ratio

1988-10-03

1989-08-29

Okonsky, David A.

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

123425, F02B 7504

Patent

active

048607118

ABSTRACT:
A variable compression engine has a cylindrical subcompression chamber formed in its cylinder head to communicate with the combustion chamber and having a variable inner volume adjustable by a piston slidably fitted therein and being controllably actuatable by an actuator activatable by a control signal generated by a control unit in accordance with the operational conditions of the engine as monitored by pertinent sensors producing respective detection signals which are fed as inputs into the control unit, which further controls the engine ignition timing. Thus, the compression ratio and the ignition timing can be accurately and positively controlled to obtain maximum torque without occurrence of knocking and to obtain desirable performance features such as reduction of pollutants in the exhaust gas emission and lowering of specific fuel consumption.

REFERENCES:
patent: 4469055 (1984-09-01), Caswell
patent: 4516537 (1985-05-01), Nakahara et al.
patent: 4572116 (1986-02-01), Hedelin

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