Abstract: Lost motion systems and methods for providing engine valves with variable valve actuation for engine valve events are disclosed. The system may include a master piston hydraulically linked to a slave piston, and a dedicated cam operatively connected to the master piston. The slave piston may be disposed substantially perpendicular to the master piston in a common housing. The slave piston is adapted to actuate one or more engine valves. The slave piston may incorporate an optional valve seating assembly into its upper end. A trigger valve may be operatively connected to the master-slave hydraulic circuit to selectively release and add hydraulic fluid to the circuit.
Type:
Grant
Filed:
April 11, 2005
Date of Patent:
December 26, 2006
Inventors:
Richard Vanderpoel, Zhou Yang, Andrew Brzoska, Brian L Ruggiero, David B Smith, James Judd, Neil E Fuchs, Michael P. Dailey, Steven N Ernest