Internal combustion engine valve actuation system

Patent · Tue Jan 05 00:00:00 EST 1988

OSTI ID:5280669

Pruzan, D A

A valve actuation system for an internal combustion engine is described comprising: (a) means coupled to a cam on the camshaft on the engine for controlling the position of an associated intake valve, (b) means for dynamically varying the position independently of any other valve in a predetermined manner depending on a selectable lift and duration pattern, (c) the intake valve including a valve closure sprig, (d) a control piston spring which is weaker than the valve closure spring interfacing between the control piston and the stop, and (e) a check valve coupled to the control cylinder for introducing fluid to the hydraulic line, and being coupled to an oiling system of the engine, and an oil spill port in the master cylinder coupled to the oiling system and being uncovered when the master piston is in its fully extended position, whereby fresh oil can be cyclically recirculated from the oil system through the check valve, the hydraulic line and the oil spill port for return to the oiling system.

• Assignee: NOV; NOV-88-004315; EDB-88-078473
• Patent Number(s): US 4716863
• OSTI ID: 5280669
• Resource Relation: Patent File Date: Filed date 15 Nov 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
VALVES
ACTUATORS
DESIGN
HYDRAULIC FLUIDS
HYDRAULICS
OPERATION
PISTONS
SPRINGS
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
FLUIDS
HEAT ENGINES
MACHINE PARTS
MECHANICS
WORKING FLUIDS
330100* - Internal Combustion Engines