Variable action arrangement for a lift valve
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United States of America Patent
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-
Mar 16, 1993
Grant Date -
N/A
app pub date -
Jan 24, 1992
filing date -
Feb 12, 1991
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A force-transmitting arrangement to effect opening of a lift valve includes a central plunger responsive to the action of a main cam and a valve-engaging piston enclosing a pressure chamber. In addition, another pressure chamber surrounding the plunger and within a displaceable cup plunger communicates with a pressure medium line having a control valve. The cup plunger is responsive to an additional cam having a different lift curve from the main cam. When the control valve is closed, the lift curve of the additional cam is transmitted to the lift valve by way of both pressure chambers. When the control valve is open, the lift curve of the main cam is transmitted to the lift valve.
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