Valve operating apparatus of internal combustion engine

Details Valve operating apparatus of internal combustion engine Valve operating apparatus of internal combustion engine

2008-01-29

2008-01-29

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

11472254

ABSTRACT:
In a valve operating apparatus of an engine capable of varying a valve lift characteristic, rotary motion of a drive cam is converted through a motion-conversion linkage including a rocker arm into oscillating motion of a valve actuation member for operating an engine valve. Also provided is a control shaft whose angular position is adjusted depending on an engine operating condition for changing a linkage attitude. The valve actuation member has an arcuate portion curved to bypass the drive shaft. The control shaft has a coaxial shaft portion and an eccentric control cam. The control cam is a fulcrum of oscillating motion of the rocker arm and the coaxial shaft portion of the control shaft is a fulcrum of oscillating motion of the valve actuation member. The fulcrums are laid out in close proximity to each other.

REFERENCES:
patent: 6691654 (2004-02-01), Uehara et al.
patent: 6907852 (2005-06-01), Schleusener et al.
patent: 2004-521234 (2004-07-01), None
patent: 2005-9330 (2005-01-01), None
patent: WO 02/092972 (2002-11-01), None

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