Verbrennungsmotor mit variablem Ventilsteuerungssystem

摘要

Object The invention aims to provide an internal combustion engine equipped with a variable valve controlling system which switches actions of an engine valve by moving slidingly a rocker arm in the axial direction of a rocker-arm shaft and which is capable of removing the restriction on the sliding movement of the rocker arm at accurate timings while employing a non-intricate configuration. Solving Means When a trigger arm (33) swings by a predetermined amount to the opposite side to a rocker arm (13), a left-hand engagement nail (34) in engagement with an engagement groove (36b) disengages from the engagement groove (36b), but a right-hand engagement nail (35) still engages with an engagement groove (36c). The left-hand engagement nail (34) is surmounted on top of a left-hand deck-like portion (38). After that, when an action of the rocker arm (13) makes the trigger arm (33) further swing to the opposite side to the rocker arm (13), the right-hand engagement nail (35) disengages from the engagement groove (36c).