| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve gear of internal combustion engine and a valve gear driving method of internal combustion engine, capable of enhancing the reliability of a hydraulic actuator. <P>SOLUTION: The valve gear of the internal combustion engine includes: a nozzle flapper mechanism which is operated by the control signal to reduce a flow path area of a nozzle, and thereby changing the pressure; a directional selector control valve for selecting an supply object of the hydraulic fluid pressure according to the operation of the nozzle flapper mechanism; a valve driving piston which is reciprocated in a valve driving cylinder according to the supply object of the hydraulic fluid pressure selected by the directional selector control valve, and capable of driving at least any one of an exhaust valve and an intake valve of the internal combustion engine. When the pressure is changed by reducing the flow path area of the nozzle of the nozzle flapper mechanism, the supply object of the hydraulic fluid pressure of the directional selector control valve is changed according to the change of the pressure, and the valve driving piston is projected from the valve driving cylinder according to the supply object of the hydraulic fluid pressure. <P>COPYRIGHT: (C)2012,JPO&INPIT |
