Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1993-01-14
1993-11-23
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9031, 464 2, 464160, F01L 134
Patent
active
052634434
ABSTRACT:
A valve timing phaseshifter between two members, such as a crankshaft driven housing and a driven camshaft member, that are hydraulically interconnected by fluid trapped in hydraulic cylinders containing plungers connected to the camshaft, relative movement between the cylinders and plungers providing the phaseshifting and being controlled by a valve that is axially movably mounted within the camshaft and hydraulically connected thereto by sets of helical grooves that are aligned or misaligned as a function of axial movement of the valve in response to the call for phase adjustment, the valve being movable from a neutral position to other positions in opposite directions to control the flow of fluid under pressure to the cylinders to cause the drive and driven members to rotate unitarily or for the camshaft to be advanced or retarded as the case may be, with respect to a conventional timing schedule.
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Boggs David L.
Schechter Michael M.
Cross E. Rollins
Drouillard Jerome R.
Ford Motor Company
Lo Weilun
May Roger L.
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