Internal-combustion engines – Four-cycle – Rotating valve
Patent
1996-02-09
1996-12-03
Solis, Erick R.
Internal-combustion engines
Four-cycle
Rotating valve
1231902, 12319017, F01L 504
Patent
active
055797300
ABSTRACT:
A rotary valve head assembly including a split head assembly, a rotary spool assembly, spool drive assemblies, and bearing and spool lubrication components. The split head assembly has bores for containing the spool assembly, bearings and spool seals, and defines passages for coolant and lubricant to pass therethrough. The head assembly is separable to provide unencumbered access to the components contained therein. The spool assembly is cylindrical and extends the length of the head assembly. The spool assembly has two ports for each combustion chamber. Each port is provided with a port relief to control the duration it is open. A separate and independent spool drive assembly provides each spool assembly rotating action. Each drive assembly effectively changes the timing of a corresponding spool assembly via instructions from the engine management system, allowing intake and exhaust timing can be controlled independently. The drive system simultaneously allows the engine to function as a compressor, thus providing an engine brake. The bearing and spool lubrication components provide support and lubrication for the spool assembly. Spring loaded lubricant control seals are mounted in the bearings and maintain contact with the spool assembly. The seals are also provided with a chamfer to control oil consumption while maintaining effective combustion chamber sealing. The instant invention eliminates the need for intake and exhaust valves and related actuation hardware, such as cams, lifters, rocker arms, and pushrods.
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Litman Richard C.
Solis Erick R.
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