Entake or exhaust valve actuator

Patent · Tue Aug 03 00:00:00 EDT 1993

OSTI ID:6275206

Smietana, J M

Intake or exhaust valve actuator assembly is described for an internal combustion engine for hydraulically opening and closing an intake or exhaust valve for admitting intake gases from an intake conduit into a combustion chamber or permitting exhaust gases to escape from the combustion chamber into an exhaust conduit, the engine including a piston which oscillates in the combustion chamber, a cylinder head which encloses the combustion chamber and contains the intake or exhaust valve and the intake or exhaust conduit, and timing means to detect phase of the piston as it oscillates in the combustion chamber; the intake or exhaust valve actuator assembly comprising a sleeve mounted in the cylinder head, a piston member slidably disposed in the sleeve cylindrical cavity, the piston member being affixed onto the stem of the associated intake or exhaust valve, and a rod bearing member mounted in the distal end of the sleeve for guiding the rod portion and forming a sliding seal therewith, and the sleeve having a distal port and a proximal port formed therein for communicating fluid pressure to the cylindrical cavity respectively distally and proximally of the piston member head portion; and hydraulic valve means actuated by the timing means and coupled to the distal and proximal ports to apply fluid pressure to at least one of the ports to move the piston member and open and close the associated intake or exhaust valve in accordance with the detected phase of the piston of the engine; and wherein the actuator assembly piston member is provided with a coating of titanium nitride on the cylindrical face of the head portion and on the rod portion, and wherein the mating surfaces of the sleeve cylindrical cavity and the rod bearing member are provided with a coating of a hard material of a lower hardness than the titanium nitride.

• Assignee: Moog Controls, Inc., East Aurora, NY (United States)
• Patent Number(s): US 5231959; A
• Application Number: PPN: US 7-991134
• OSTI ID: 6275206
• Resource Relation: Patent File Date: 16 Dec 1992
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
VALVES
ACTUATORS
CONTROL SYSTEMS
PISTONS
SLEEVES
TITANIUM NITRIDES
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
MACHINE PARTS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
330603* - Vehicle Design Factors- Engine System
330100 - Internal Combustion Engines