Direct port rotary valve mechanism with variable timing for internal combustion engines
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United States of America Patent
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-
Feb 17, 2004
Grant Date -
Oct 17, 2002
app pub date -
Apr 4, 2002
filing date -
Apr 12, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a variably timed rotary valve mechanism for controlling the air/fuel intake into and exhaust gases out of an internal combustion engine. There are two rotary valve shafts, one intake and one exhaust, that contain two intake and two exhaust valve ports per engine cylinder. These rotary valve shafts are driven by and synchronized with the engine crankshaft via a conventional timing belt. The timing of each of these rotary valve shafts relative to the crankshaft can be varied individually through hydraulic servomotors under control of a computerized engine management system.
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