Patent ID: 6378474
Filing Date: 2002-04-30
Classification: F01L

Abstract:
Valve actuating mechanism comprising:a rotary crank rotatable about a primary axis; a control member pivotable about said primary axis and including a first pivot axis spaced from said primary axis; a primary lever connected with said control member and pivotable about said first pivot axis, said primary lever having a distal end, and a connecting rod connecting said rotary crank with said primary lever intermediate said distal end and said first pivot axis for positively oscillating said primary lever about the first pivot axis without requiring return spring means; and a pair of secondary levers each having one end pivotable about said primary axis, said one ends including oscillating cams engaging separate valve actuating members for actuating dual valves and having base circle portions and valve lift portions, the secondary levers having distal ends operatively connected with the distal end of said primary lever; said control member being movable between a first angular position wherein the valve lift portions and the base circle portions of said oscillating cams alternately engage their respective valve actuating members for fully opening and closing associated valves with intermediate dwell periods and a second angular position wherein primarily the base circle portions of said oscillating cams engage the valve actuating members for providing minimal opening and closing movement of said associated valves.