Variable valve apparatus for internal combustion engine

Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing

Reexamination Certificate

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C123S090150, C123S090310

Reexamination Certificate

active

07401581

ABSTRACT:
A variable valve apparatus for an internal combustion engine including a cylinder set comprising a plurality of cylinders. The variable valve apparatus includes: a control shaft adapted for rotation; a valve actuating mechanism provided for each cylinder of the cylinder set and adapted to vary a valve lift characteristic of an engine valve of the each cylinder of the cylinder set in accordance with a rotational position of the control shaft; and a valve lift adjusting mechanism provided for each cylinder of a first subset of the cylinder set and adapted to adjust the valve lift characteristic of the engine valve of the each cylinder of the first subset in accordance with a standard valve lift characteristic determined in accordance with the valve lift characteristic of the engine valve of each cylinder of a second subset of the cylinder set.

REFERENCES:
patent: 6622678 (2003-09-01), Shimizu et al.
patent: 2004/0074475 (2004-04-01), Weiss et al.
patent: 2001-123809 (2001-05-01), None

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