Variable valve timing mechanism

Details Variable valve timing mechanism Variable valve timing mechanism

1997-10-08

1998-09-22

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, 123 9021, 123 9039, F01L 1300

Patent

active

058099530

ABSTRACT:
A number of embodiments of twin overhead cam shaft reciprocating machines having a plurality of poppet valves. A variable valve timing mechanism is interposed between the cam shafts and respective of the poppet valves for varying their lift and for changing the number of effective poppet valves per cylinder. The lift changing mechanism includes means for shifting at least one rocker arm follower and provides a relatively compact yet highly efficient structure for achieving this purpose.

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