Compression ratio variable device in internal combustion engine

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

2006-06-27

2006-06-27

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

Reexamination Certificate

active

07066118

ABSTRACT:
A compression ratio changing device in an internal combustion engine includes a piston inner element, a piston outer element slidably fitted over an outer periphery of the piston inner element for sliding movement only in an axial direction and capable of being moved between a lower-compression ratio position (L) and a higher-compression ratio position (H), a bulking member capable of being turned about axes of the piston inner and outer elements between a non-bulking position (A) and a bulking position (B), and an actuator connected to the bulking member for turning the bulking member to the non-bulking position (A) and the bulking position (B). The bulking member permits movement of the piston outer element to the lower-compression ratio position (L) when it is in the non-bulking position (A), and retains the piston outer element in the higher-compression ratio position (H), when it is turned to the bulking position (B).

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