Compression ratio variable device of internal combustion engine

Details Compression ratio variable device of internal combustion engine Compression ratio variable device of internal combustion engine

2007-10-23

2007-10-23

Wolfe, Willis R. (Department: 3747)

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

C123S0480AA

Reexamination Certificate

active

10523692

ABSTRACT:
An internal combustion engine variable compression ratio system includes a piston inner, a piston outer that, while being fitted around the outer periphery of the piston inner, so it slides only in the axial direction, is capable of moving among low (L), high (H), and medium (M) compression ratio positions, and two sets of raising means disposed in line in the axial direction between the piston inner and outer. Each set of raising means includes a movable raising member, which can pivot individually between a non-raised position (A) and a raised position (B) around the axis of the piston inner and outer. It is thus possible to provide an internal combustion engine variable compression ratio system that enables the compression ratio to be appropriately switched between at least three stages, that is, between low, medium and high compression ratios, without rotating the piston outer.

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