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US 2013/0340430 A1Published application
Systems and methods for a hydraulically actuated engine valve
AssigneeGeneral Electric Company
InventorsEric David PETERS, Nicholas Eric Hansen, Diane Darak
Life of this patent
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Abstract
Various methods and systems are provided for controlling a hydraulically actuated engine valve. In one example, a system includes a hydraulically actuated engine valve and an engine having a first hydraulic system. The system further includes a second hydraulic system, which is separate from the first hydraulic system, and where the second hydraulic system provides fluid pressure to actuate the valve.
Claims26
A system, comprising:
- a hydraulically actuated engine valve;
- an engine having a first hydraulic system;
- and
- a second hydraulic system, separate from the first hydraulic system, wherein the second hydraulic system provides fluid pressure to actuate the valve.
1 more element
A method, comprising:
- driving a first pump via a crankshaft of an engine in a first hydraulic system;
- driving a second, electrically driven pump in a second hydraulic system;
- and
- actuating a hydraulically driven engine valve with the second hydraulic system, the valve external to a combustion chamber of the engine.
1 more element
A method, comprising:
- in an engine system having a first hydraulic system and a second hydraulic system that is separate from the first hydraulic system, actuating a hydraulically actuated engine valve with fluid from the second hydraulic system;
- ranging the valve through at least a partial range of motion and recording and scaling the range of motion during a first condition;
- adjusting the valve to a desired position during a second condition;
- and
- dithering the valve during a third condition.
2 more elements
A system, comprising:
- a hydraulically actuated engine valve;
- an engine with a first hydraulic system;
- a second hydraulic system, separate from the first hydraulic system, where the second hydraulic system provides fluid pressure to actuate the valve;
- and
- a control system configured to, during a first condition, range the valve through a range of motion and record and scale the range of motion, during a second condition, adjust the valve to a desired position, and during a third condition, dither the valve.
2 more elements
Dependencies are inferred from the claim text.