| 摘要 |
<p>The present invention provides a variable valve mechanism (10) which includes a camshaft (12) having a drive cam (14), a rocker shaft (25), and a variable mechanism (30) that is provided on the rocker shaft (25), 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 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.</p> |
