| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve lift device whose structure and control logic can be simplified by performing driving control of a valve by a hydraulic driving system. <P>SOLUTION: The valve 22a for opening/closing an intake port 11b opened in a cylinder chamber 11c is controlled for driving by supply/discharge of oil O to a supply/discharge chamber 21a arranged in the rear end part of the valve, and the supply/discharge of the oil O to the supply/discharge chamber 21a is performed by a passage opening/closing mechanism 30 having a rotary valve 34 rotating by driving of a reciprocating engine 11. Thus, driving control of the valve 22a can be performed by the hydraulic driving system via the rotary valve 34 synchronizing with the driving of the reciprocating engine 11, and the structure and the control logic of the valve lift device 10 can be simplified. <P>COPYRIGHT: (C)2013,JPO&INPIT |
