Variable valve actuation apparatus of internal combustion...

Details Variable valve actuation apparatus of internal combustion... Variable valve actuation apparatus of internal combustion...

2011-08-30

2011-08-30

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090390, C123S090440, C074S569000

Reexamination Certificate

active

08006658

ABSTRACT:
A variable valve actuation apparatus of an internal combustion engine has a multinodular-link motion converter, to vary at least a working angle. A position of rotation of a control shaft, variably adjusting the attitude of the motion converter, is set, so that, at a peak lift during a valve opening period, an angle γ2between an extension line of a line segment connecting a first fulcrum corresponding to a drive-eccentric-cam center and a second fulcrum provided on a rocker arm and a line segment connecting the second fulcrum and a third fulcrum provided on the rocker arm at a position different from the second fulcrum at a middle working-angle control mode is less than both an angle γ1between the two line segments at a minimum working-angle control mode and an angle γ3between the two line segments at a maximum working-angle control mode.

REFERENCES:
patent: 6041746 (2000-03-01), Takemura et al.
patent: 7246578 (2007-07-01), Nakamura et al.
patent: 1-315631 (1989-12-01), None
patent: 11-264307 (1999-09-01), None
patent: 2006-307658 (2006-11-01), None

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