Hydraulic engine valve actuator

Details Hydraulic engine valve actuator Hydraulic engine valve actuator

2005-02-22

2005-02-22

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C091S169000

Reexamination Certificate

active

06857404

ABSTRACT:
An integrated hydraulic valve actuator for use in a camless internal combustion engine. The valve actuator includes a separate bolt-on housing defining a through opening receiving a cylindrical liner. The liner internally defines an internal cylinder providing a riding surface, which coaxially surrounds an outer surface of a tubular boost piston. The boost piston defines an inner cylinder, which provides a riding surface for a drive piston fitted within the inner cylinder of the boost piston. The pistons are axially reciprocable within the liner cylinder. A piston position sensor extends radially into the housing and engages a cam on the drive piston to relay the position of the drive piston to a controller. The actuator is preassembled and the housing is attached to an engine cylinder head or cylinder head supply manifold to operate an associated exhaust or intake valve.

REFERENCES:
patent: 4050359 (1977-09-01), Mayer
patent: 4162616 (1979-07-01), Hayashida
patent: 20020157531 (2002-10-01), Kadlicko
patent: 20040050349 (2004-03-01), Leman et al.

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