| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve operated with hydraulic pressure for an internal combustion engine. SOLUTION: The valve operated with hydraulic pressure for the internal combustion engine is equipped with a hydraulic pressure type actuator for operating the valve to the position of seating on and the position of separating from, a primary pressure chamber 35 where the pressurized fluid acts on the surface of a first piston to be an extended position, a port 11 capable of mutually connecting to the high pressure source of the working fluid or a return line, and a first flow path between the port and the primary pressure chamber. It has means 48, 49, 36, 36', 36", 55 for changing flow resistance of the first flow path in relation to the position of the first piston. The valve has a stem 24 which is operatably connected to the first piston 32 arranged in a fixed housing 31 of the actuator. The first piston is at the retracted position when the valve seats on the seat, and at the extended position when the valve separates from the seat. COPYRIGHT: (C)2004,JPO
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