| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a valve gear of an internal combustion engine which can reduce the torque fluctuation of a camshaft by a torque reduction mechanism which can suppress a weight increase of the camshaft caused by the installation of the torque reduction mechanism, and can prevent the upsizing of the internal combustion engine while securing required supporting rigidity used for supporting an energizing member of the torque reduction mechanism. <P>SOLUTION: The torque reduction mechanisms 50i, 50e of the valve gear are provided with canceling cams 51 and the energizing members 52 which rotate integrally with a suction camshaft 21 and an exhaust camshaft 22. The energizing member 52 is constituted of an arm member 53 and an energizing force generating member 54. The arm member 53 applies a counter force to the canceling cam 51, and the counter force generates counter torque which reduces torque fluctuation which is generated in the camshafts 21, 22 by reaction forces from a suction valve and an exhaust valve. The energizing force generating member generates an energizing force which energizes the arm member and brings it into contact with the canceling cam 51. The arm member 53 is supported by a connection part 60 which connects a pair of bearings to each other which supports the camshafts 21, 22 rotatably. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
