POSITIVE CONTROL (DESMODROMIC) VALVE SYSTEMS FOR INTERNAL COMBUSTION ENGINES
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United States of America Patent
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Issued Date -
Apr 9, 2015
app pub date -
Dec 15, 2014
filing date -
Nov 23, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Various types of valve systems are disclosed herein. In one embodiment, a positive control reciprocating sleeve valve system for use with an internal combustion engine includes opening and closing rockers controlled by corresponding opening and closing cam lobes. In one aspect of this embodiment, interference can be designed into the valve control system to provide additional “hold-closed” force to hold the valve against its seat during a portion of the engine cycle. In another aspect of this embodiment, positive control valve systems can include compliant components and systems, hydraulic systems, pneumatic systems, and/or mechanical spring systems to control valve lash, facilitate sealing, etc.
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