Patent ID: 6032624
Filing Date: 2000-03-07
Classification: F01L

Abstract:
An engine valve actuating device, characterized in that it is provided with:a camshaft having three cam portions with different cam-lift heights, which are arranged on the outer peripheral surface of the camshaft;a rocker arm having a base end that is rotatably supported on a rocker shaft and for opening and closing an engine valve in accordance with rotation of the first cam portion with the minimum cam-lift height;a first sub-rocker arm having a base that is disposed adjacent to the base end of said rocker arm and rotatably supported on the rocker arm, and swinging in accordance with rotation of said second cam portion with higher cam lift than the first cam portion;a second sub-rocker arm having a base that is disposed adjacent to the base end of said rocker arm and the base of the first sub-rocker arm and rotatably supported on the rocker arm, and swinging in accordance with rotation of the third cam portion with higher cam lift than the second cam portion;a connecting member having a first engaging portion for connecting, when engaged with an engaged portion arranged on the first sub-rocker arm, the first sub-rocker arm and the rocker arm so as to swing the first sub-rocker arm together with said rocker arm, and a second engaging portion integrally formed with the first engaging portion and for connecting, when engaged with an engaged portion arranged on the second sub-rocker arm, the second sub-rocker arm and the rocker arm and the first sub-rocker arm so as to swing the second sub-rocker arm together with said rocker arm and first sub-rocker arm;drive means for selectively putting the first engaging portion and second engaging portion of said connecting member in engagement or non-engagement with the engaged portions of the first sub-rocker arm and second sub-rocker arm; anda control part for making the drive means carry out, in accordance with said engine operating state, operation of selectively engaging the first engaging portion and second engaging portion of the connecting member with engaged portions of the first sub-rocker arm and second sub-rocker arm, respectively.