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SYSTEM AND METHOD FOR ENGINE VALVE LIFT STRATEGY
SYSTEM AND METHOD FOR ENGINE VALVE LIFT STRATEGY
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机译:发动机气门升程策略的系统和方法
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摘要
A system for controlling a valve in an engine is provided. The system includes a pump piston operably coupled to the valve. The valve is displaceable with electro-hydraulic variable valve actuation. The system also includes a cam lobe operably coupled to the pump piston. The cam lobe includes a profile configured so rotation of the cam lobe directs movement of the pump piston. The pump piston movement includes an increasingly accelerated first duration, followed by a decreasingly accelerated second duration, followed by an increasingly accelerated third duration, wherein when the valve is actuated the valve movement is in accordance with the configuration of the cam lobe.
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