Stroke-variable engine

Internal-combustion engines – Adjustable combustion chamber – Piston in head adjusted

Reexamination Certificate

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Reexamination Certificate

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07661395

ABSTRACT:
In a stroke-variable engine, the position of a center of gravity of a subsidiary connecting rod is determined so that a distance between the position of the center of gravity of the subsidiary connecting rod and an axis of a crankpin is smaller than a distance between a point of connection of a main connecting rod to the subsidiary connecting rod and the position of the center of gravity as well as a distance between a point of connection of a control rod to the subsidiary connecting rod and the position of the center of gravity. Thus, 0.5-order vibration generated in the subsidiary connecting rod is lowered, engine vibration is suppressed, and noise generated with the vibration is suppressed.

REFERENCES:
patent: 4517931 (1985-05-01), Nelson
patent: 5335632 (1994-08-01), Hefley
patent: 6561142 (2003-05-01), Moteki et al.
patent: 6622670 (2003-09-01), Hiyoshi et al.
patent: 2002/0144665 (2002-10-01), Ushijima et al.
patent: 9-228858 (1997-09-01), None
patent: 2002-129995 (2002-05-01), None
patent: 2003-314237 (2003-11-01), None
patent: 20040332169 (2004-11-01), None
patent: 1020030082450 (2003-11-01), None

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