Variable compression ratio apparatus for internal combustion eng

Details Variable compression ratio apparatus for internal combustion eng Variable compression ratio apparatus for internal combustion eng

1991-01-17

1992-09-15

Okonsky, David A.

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

123 78BA, 12378E, F02B 7502

Patent

active

051468794

ABSTRACT:
A variable compression ratio apparatus is provided for use in an internal combustion engine. The apparatus has an eccentric sleeve rotatably arranged in one of pivot portions at opposite ends of a connecting rod so as to make a bearing hole of the connecting rod and a pin, which extends through the bearing hole, eccentric relative to each other. The apparatus also has an eccentric sleeve lock device capable of fixing rotation of the eccentric sleeve at a desired position. The lock device includes a pin member engageable with one of engagement portions formed in the eccentric sleeve and a piston-type fluid pressure drive system. The drive system is adapted to produce a pressure difference between fluid pressure chambers formed at opposite sides of a piston portion, which is connected to the pin member, in a state that the fluid pressure chambers are applied with a prescribed fluid pressure, whereby the piston portion is moved to drive the pin member.

REFERENCES:
patent: 1386114 (1921-08-01), Jedrykowski
patent: 2427668 (1947-09-01), Gill
patent: 3185138 (1965-05-01), Druzynski
patent: 4254743 (1981-03-01), Reid et al.
patent: 4406256 (1983-09-01), Akkerman
patent: 4687348 (1987-08-01), Naruoka et al.
patent: 4721073 (1988-01-01), Naruoka et al.
patent: 4864975 (1989-09-01), Hasegawa

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