Systems and methods for variable valve actuation
OwnerAmir Khajepour, Mohammad Pournazeriinventors
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Abstract
The disclosure is directed at a valvetrain actuation (VA) system for an engine comprising at least two hydraulic rotary valves connected to an engine crankshaft, at least one hydraulic actuator driven by the at least two hydraulic rotary valves, and a high pressure hydraulic fluid source for supplying hydraulic fluid to one of the at least two hydraulic rotary valves, wherein movement of the at least two hydraulic rotary valves by the engine crankshaft allows hydraulic fluid to flow to the at least one hydraulic actuator to actuate an engine valve.
Claims17
A valvetrain actuation (VA) system for an engine comprising:
- at least two hydraulic rotary valves connected to an engine crankshaft;
- at least one hydraulic actuator driven by the at least two hydraulic rotary valves;
- and
- a high pressure hydraulic fluid source for supplying hydraulic fluid to one of the at least two hydraulic rotary valves;
- wherein movement of the at least two hydraulic rotary valves by the engine crankshaft allows hydraulic fluid to flow to the at least one hydraulic actuator to actuate an engine valve.
A method of hydraulically controlling an engine valve comprising:
- supplying pressurized hydraulic fluid to one of at least two hydraulic rotary valves;
- driving the at least two hydraulic rotary valves with an engine crankshaft;
- wherein the driving of the at least two hydraulic rotary valves causes the one of the at least two hydraulic rotary valves to supply the hydraulic fluid to at least one hydraulic actuator to actuate an engine valve in a first direction.
Dependencies are inferred from the claim text.