Compact lost motion system for variable value actuation

US7152576B2 · kind B2 · utility

Inventors

• Richard Vanderpoel · Bloomfield, US
• Zhou Yang · Oak Ridge, US
• Andrew Brzoska · Bristol, US
• Brian Ruggiero · Town of East Granby, US
• David Smith · Westfield, US
• James Judd · Union, US
• Neil Fuchs · 3a Avenida SO, US
• Michael Dailey · Lake Oswego, US
• Steven Ernest · Windsor, US

Key dates

• Filing date: Apr 11, 2005
• Grant date: Dec 26, 2006
• Expiry date: Jun 23, 2025

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2810/04
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

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.