| 摘要 |
PROBLEM TO BE SOLVED: To efficiently lubricate sliding parts of members, in a variable valve drive system capable of being mounted without substantially changing an engine constitution and of changing a working angle of a cam with a simple structure. SOLUTION: An eccentric plate 250 is positioned adjacent to an one end part side of a rotational shaft of a cam sprocket 211 and is rotated by drive of the cam sprocket 211. The eccentric plate 250 is rotated and driven in a position eccentric to the rotational shaft of the cam sprocket 211, and is rotated and driven by a rotational phase difference changing an intake cam piece 240 periodically via a variable cam shaft 230. The intake cam piece 240 is arranged in the other end part side of the rotational shaft of the cam sprocket 211 and changes the working angle of an intake valve. A main lubricating passage 238 is provided so as to penetrate through the rotational shaft of the cam sprocket 211, and supplies lubricating oil to the sliding part of the intake cam piece 240 in the other end part side of the cam sprocket 211 and the sliding part of the eccentric plate 250 in the one end part side of the cam sprocket 211. COPYRIGHT: (C)2006,JPO&NCIPI
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