Patent ID: 8833317
Filing Date: 2014-09-16
Classification: F01L

Abstract:
1. A variable valve mechanism having a variable mechanism that changes the opening/closing amount of a valve, comprising: an input shaft that is rotationally driven by an internal combustion engine, the input shaft including a crank mechanism that converts the rotational motion of the input shaft into reciprocating motion for opening and closing the valve, the crank mechanism being connected to the variable mechanism; wherein the variable mechanism includes an input oscillating member connected to the crank mechanism, an output oscillating member that presses the valve, and a control member that rotates to displace the relative phase between the input oscillating member and the output oscillating member, the input oscillating member and the output oscillating member are pivotally supported in an oscillatable manner by a control shaft provided in parallel with the input shaft, and the control member is provided on the control shaft; and wherein the control member has an outer circumferential surface whose distance from an axial center of the control shaft gradually changes, the variable mechanism includes a displacement member that is connected to the input oscillating member and the output oscillating member via connection members, and displaced by rotation of the control member and the distance changes between a center of a support portion protruding from the displacement member to support the two connection members in an oscillatable manner and the axial center, so that the relative phase between the input oscillating member and the output oscillating member is displaced.