Patent ID: 9163534
Filing Date: 2015-10-20
Classification: F01L,F02D

Abstract:
1. A valve actuation mechanism for an internal combustion engine on an automotive vehicle, comprising rockers moved by a camshaft, each rocker being adapted to exert a valve opening force on at least a portion of a valve opening actuator of each cylinder, via an activation piston, housed in a bore of the rocker and movable with respect to the rocker under action of a fluid pressure raise in a chamber fluidly connected to the bore, from a first position to a second position with respect to the rocker, in which a cam follower of the rocker is adapted to read at least one auxiliary valve lift sector of a cam of the camshaft so as to perform an engine operating function, each rocker comprising a check valve adapted to control the fluid pressure raise in said chamber, wherein the valve actuation mechanism comprises, for each rocker, a stopper fast with a housing of the engine and adapted to exert, on a member of the rocker, a force for opening a valve independent from the check valve, adapted to release fluid from the chamber when the piston has to be moved from its second position to its first position.