Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1993-05-07
1994-01-04
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
123 9015, 123 9024, 251 31, 251 47, F01L 902
Patent
active
052751368
ABSTRACT:
A variable valve assembly, engine valve control system, and method of operation wherein the valve is hydraulically controlled and includes a valve piston subjected to fluid pressure acting on surfaces at both ends of the valve piston. The cavity at one end of the valve piston is connected to a source of high pressure fluid while the cavity at the other end is connected to a source of high pressure fluid and a source of low pressure fluid, and disconnected from each through action of controlling means such as solenoid valves. The valve assembly includes a damper to limit the velocity of the valve during a portion of the travel of the piston, particularly as the valve head lands on the valve seat.
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Levin Michael B.
Schechter Michael M.
Cross E. Rollins
Drouillard Jerome R.
Ford Motor Company
Lo Weilun
May Roger L.
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