| 摘要 |
PROBLEM TO BE SOLVED: To suppress the part wear by preventing the partial contact in the contact part of a taper cam and an oscillating cam. SOLUTION: The taper cam 14 is formed in a cam shaft 4, and the oscillating cam 5 is arranged between a locker arm 3 and the cam shaft 4 to drive a valve 6. The taper cam 14 is moved by an actuator 24 in the axial direction of the cam shaft 4 for the oscillating cam 5, and the initial phase of the oscillating cam 5 is changed with the operating condition of an internal combustion engine. A cam follower 18 is formed in a support 17 of the oscillating cam 5, and a plane part 18b contacting a taper surface 14c of the taper cam 14 is formed in the shaft. The shaft of the cam follower 18 is swingably supported in the support 17 around the axis line at right angles to the rotation axis line of the taper cam 14 and contained in the plane part 18b. COPYRIGHT: (C)2007,JPO&INPIT
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