Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Reexamination Certificate
2005-12-27
2005-12-27
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
C123S090130, C123S090160
Reexamination Certificate
active
06978746
ABSTRACT:
The present invention provides an improvement over conventional engine control systems for variable valve control devices for the valvetrain in that it provides a substantially closed-circuit hydrostatic fluid control system and accompanying method to improve response time of the variable valve control device and reduce energy consumption by an engine oil pump. The hydrostatic fluid control system preferably comprises a bi-directional fluid-pumping device that is fluidly connected to a variable valve control device. A controller is operable to control the bi-directional fluid-pumping device and operable to determine rotational position of the variable valve control device.
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Chang Ching
Delphi Technologies Inc.
Denion Thomas
Funke Jimmy L.
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