Hydraulic engine valve actuation system including independent feedback control
A hydraulic valve actuation assembly may include a housing, a piston, a supply control valve, a closing control valve, and an opening control valve. The housing may define a first fluid chamber, a second fluid chamber, and a third fluid chamber. The piston may be axially secured to an engine valve and located within the first, second and third fluid chambers. The supply control valve may control a hydraulic fluid supply to the piston. The closing control valve may be located between the supply control valve and the second fluid chamber and may control fluid flow from the second fluid chamber to the supply control valve. The opening control valve may be located between the supply control valve and the second fluid chamber and may control fluid flow from the supply control valve to the second fluid chamber.
- Research Organization:
- GM Global Technology Operations LLC
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-05NT42415
- Assignee:
- GM Global Technology Operations LLC
- Patent Number(s):
- 8,453,619
- Application Number:
- 12/984,233
- OSTI ID:
- 1084367
- Country of Publication:
- United States
- Language:
- English
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