Variable compression ratio device of internal combustion engine

Details Variable compression ratio device of internal combustion engine Variable compression ratio device of internal combustion engine

2006-12-27

2009-08-18

Cuff, Michael (Department: 3741)

Internal-combustion engines

Four-cycle

Variable clearance

C091S505000

Reexamination Certificate

active

07574986

ABSTRACT:
A variable compression ratio device includes a piston having a piston inner part and a piston outer part. The piston outer part integrally includes ear parts facing opposite ends of a piston pin and having long holes with longer diameters directed in an axial direction of a piston. A shaft portion connected to the opposite ends of the piston pin is slidably fitted in the long holes to allow an axial relative movement between the piston inner part and the piston outer part, while preventing relative rotation between the piston inner part and the piston outer part. Thus, the variable compression ratio device reliably prevents the relative rotation between the piston inner part and the piston outer part with a simple structure, and reduces weight of the piston.

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