Oscillating camshaft controlled valve operating device
OwnerRoberto Marcelo Codina, Sergio Daniel Codinainventors
Life of this patent
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Abstract
A valve operating device of an internal combustion engine, capable of varying the lift, the opening and closing angle of the intake valves. What makes it unique is that the camshaft is not fixed to the cylinder head, but it oscillates around a shaft, and by means of this oscillation, the valve lift and duration are changed. A command shaft changes the angular position of the camshaft holders and thus the camshaft position. The camshaft is driven by the crankshaft and rotates inside the camshaft holder. The cams drive intermediate arms. Rocker arms are driven by the intermediate arms and, in turn, drive the valves.
Claims11
A valve operating device of an internal combustion engine, capable of varying the lift, the opening and closing angles of the intake valves, composed by:
- a main shaft fixed on the cylinder head;
- one camshaft holder per cylinder that rotates around the main shaft;
- a command shaft mounted on the cylinder head, in a way it can rotate or move;
- a camshaft that operates connected to the crankshaft, such that the camshaft is rotated by the crankshaft by means of a pair of gears and a phase-difference varying device;
- a rotating cam per admission valve, provided on the camshaft;
- an intermediate arm per admission valve, which rotate around the main shaft and transmit a movement to the valves by means of the rolling part of a rocker arm;
- a spiral spring per cylinder that forces the intermediate arms to maintain contact with the corresponding cam.
Dependencies are inferred from the claim text.