Variable compression ratio piston

Details Variable compression ratio piston Variable compression ratio piston

1991-12-23

1993-01-12

Okonsky, David A.

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

123 78B, F02D 1502

Patent

active

051781034

ABSTRACT:
A variable compression ratio device for an internal combustion engine includes a connecting rod having passages formed therein for communicating a hydraulic signal to the piston attached to the connecting rod, means for generating a hydraulic signal having a signal characteristic which is indicative of a desired compression ratio, and a variable compression height piston which is positionable in a plurality of compression heights, including fully retracted, fully extended, and at least one position therebetween, with the piston having an outer section slidably mounted on an inner section, and with the inner section being attached to the connecting rod, with the piston having means responsive to inertia and gas pressure forces and to the generated hydraulic signal for controlling the compression height.

REFERENCES:
patent: 3405697 (1968-10-01), Marchand
patent: 3527264 (1970-09-01), Bachle
patent: 4031868 (1977-06-01), Karaba et al.
patent: 4864975 (1989-09-01), Hasegawa
patent: 4864977 (1989-09-01), Hasegawa
patent: 4934347 (1990-06-01), Suga et al.

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