Variable valve timing device for an internal combustion engine

Details Variable valve timing device for an internal combustion engine Variable valve timing device for an internal combustion engine

1982-05-20

1984-10-09

Koczo, Michael

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9039, F01L 134

Patent

active

044754892

ABSTRACT:
In a variable valve timing device for an engine in which a pair of rocker arms driven by cams are provided for a valve in the intake or exhaust system, and fulcrums at the bases of the rocker arms are alternately displaced to cause the rocker arms to assume an operative position and an inoperative position, the two rocker arms are caused to assume their operative positions simultaneously for an overlap period before alternately assuming the operative and inoperative positions. In this manner, the high speed condition and the low speed condition are smoothly switched from one to the other.

REFERENCES:
patent: 2410411 (1946-11-01), Gregory
patent: 3413965 (1968-12-01), Gavasso

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