Variable valve lift/timing mechanism

Details Variable valve lift/timing mechanism Variable valve lift/timing mechanism

1986-02-28

1987-01-27

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9027, 123 9046, 123 9055, F01L 3114

Patent

active

046387730

ABSTRACT:
A variable valve lift and timing valve train mechanism includes a rocker arm having one end thereof operatively engaging a valve and its opposite end being engaged by a valve actuator, the upper surface of the rocker arm intermediate its ends having a predetermined cam surface profile which is adapted to cooperate with a working surface of an angular movable upper reaction member so as to provide a fulcrum to effect pivotal movement of the rocker arm in a valve opening direction. The point of line contact between the cam surface of the rocker arm against the working surface of the upper reaction member and the geometry of the upper surface of the rocker arm cooperate to control the amount of valve lift and its timing.

REFERENCES:
patent: 3413965 (1968-12-01), Gavasso
patent: 4438736 (1984-03-01), Hara et al.
patent: 4484546 (1984-11-01), Burandt
patent: 4498432 (1985-02-01), Hara et al.
patent: 4526142 (1985-07-01), Hara et al.
patent: 4539951 (1985-09-01), Hara et al.
patent: 4567861 (1986-02-01), Hara et al.

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