Pneumatic actuator with solenoid operated control valves

Details Pneumatic actuator with solenoid operated control valves Pneumatic actuator with solenoid operated control valves

F - Mech Eng,Light,Heat,Weapons

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F01L 9/02 (2006.01) F01L 9/04 (2006.01)

Patent

CA 1314775

ABSTRACT: Pneumatic actuator with solenoid operated control valves. A bistable electronically controlled pneuma- tically powered transducer for use, for example, as a valve mechanism actuator in an internal combustion engine is disclosed. The transducer has an armature including a piston which is coupled to an engine valve, for example. The piston is powered by a pneumatic source and includes asymmetric pneumatic damping. Air damping may be differentially controlled to provide dissimilar damping at the two extremes of piston motion. The armature is held in each of its extreme positions by pneumatic pressure under the control of control valves which are in turn held in their closed positions by pressurised air latching arrangements and are released therefrom to supply air to the piston to be pneumatically driven to the other extreme position by an electromagnetic solenoid or by an electromagnetic repulsion arrangement. The control valves may be spring loaded toward their open positions.

603010

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