Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1990-11-02
1991-10-01
Wolfe, Willis R.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9027, F01L 134
Patent
active
050523503
ABSTRACT:
A mechanism for combining, so as to reconcile in a dynamically acceptable manner, the valve actuating displacement of a pair of camlobes rotating at variable relative phasings so as to vary the duration of a valve; the mechanism comprising a first lever having a first cam follower to engage a first camlobe, a second cam follower to engage a second camlobe, and a fulcrum to rotatably engage a means to actuate a valve; the means to actuate a valve comprising variously i) a bucket tappet having a fulcrum to rotatably locate the first lever, ii) a second lever rotating about a fulcrum, having a fulcrum to locate rotatably the first lever, and extension/s to engage operatively a valve/s.
REFERENCES:
patent: 1885796 (1932-11-01), Boulet
patent: 4768475 (1988-09-01), Ikemura
Lo Weilun
Wolfe Willis R.
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