Method and valve for reducing valve opening and closing time durations
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United States of America Patent
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May 17, 2005
Grant Date -
Nov 20, 2003
app pub date -
Feb 21, 2003
filing date -
Feb 22, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process reducing the side opening and closing time of a valve. The process uses a valve for mounting in an intake port of a reciprocating engine upstream from a charge changing valve, which valve contains a valve element operating in conjunction with the inner wall of the intake port, and may be moved back and forth between a closed position and an open position. The valve in the closed position blocks passage of fluid through the port and when in the open position, clears such passage. The valve is characterized in that the inner wall of the port and the valve element are of a design such that when the valve element is moved from its closed position the opening cross-section initially does not increase at all or increases only slowly and then increases rapidly and when the valve element is moved from its open position the opening cross-section initially does not decrease at all or decreases only slowly and then decreases rapidly.
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