| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a variable valve train not increasing the total height of a cylinder head. Ž<P>SOLUTION: The variable valve train 10 includes a camshaft 12 having a drive cam 14, a rocker shaft 25 provided in parallel with the camshaft 12, and a variable mechanism 30 that is provided on the rocker shaft 25, that is put between the drive cam 14 and a valve 13, and that changes an opening/closing amount of the valve 13. The variable mechanism 30 includes a main arm 35 that engages with the drive cam 14, a cam arm 40 that has a cam surface 41 pressing the valve 13, a control cam 31 that is provided on the rocker shaft 25 and that has an outer peripheral surface 32 whose distance from a shaft center 26 of the rocker shaft 25 varies gradually, and a displacement member 48 whose distance from the shaft center 26 is changed by turning of the control cam 31. A relative phase between the main arm 35 and the cam arm 40 is displaced as the distance between the displacement member 48 and the shaft center 26 changes. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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