Adjustable valve control system with twin cams and cam lift summation lever
AssigneeMechadyne PLC
InventorIan Methley
Life of this patent
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Abstract
A control system is disclosed for operating an engine valve. The system comprises two cams (2, 3) arranged on a common camshaft (1) but rotatable relative to one another. A summation lever (6) has cam followers (4 and 5) in contact with the respective cams (2 and 3). The summation lever (6) is movable in proportion to the instantaneous sum of the lifts of the respective cams. Rockers (8) are provided for opening the engine valve (10) in dependence upon the movement of the summation lever (6). By varying the phase of the cams (2 and 3) relative to one another, it is possible to vary the valve timing, valve lift and/or valve event duration.
Claims14
1-13 (canceled)
A control system for operating an engine valve, which comprises two cams, a summation lever having cam followers in contact with both cams, the summation lever being movable in proportion to the instantaneous sum of the lifts of the respective cams, and a valve actuator serving to open the engine valve in dependence upon the movement of the summation lever, the valve timing, valve lift and valve event duration being dependent upon the phases of the two cams, characterized in that the two cams are mounted coaxially with one another.
Dependencies are inferred from the claim text.