Variable timing cam follower lever assembly

Details Variable timing cam follower lever assembly Variable timing cam follower lever assembly

1996-05-29

1997-09-16

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9034, 123500, 123502, F01L 134

Patent

active

056669135

ABSTRACT:
A cam follower lever assembly is provided which permits variable control of the timing of the beginning of operation of an engine component, i.e. fuel injector or engine valve. The cam follower lever includes a timing control lever and a force transmitting lever mounted for pivotal movement on a common pivot shaft. The timing control lever is also mounted for nonpivotal movement, relative to the pivot shaft, by a hydraulic actuation device permitting selective nonpivotal movement of the timing control lever relative to a cam's outer surface so as to selectively advance or retard the timing of, for example, fuel injection. The actuation device includes actuator cavities formed in the levers and a control valve arrangement. In one embodiment, a control valve is mounted in a cavity formed in the timing control lever.

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