Variable Valve Actuation (VVA) comprising - a cam (CS), - a valve (V) suitable to displace between a closed position and an open condition caused by a rotation of said cam, and further comprising a main rocker arm (MA) suitable to swing over a fulcrum (F), mechanically interacting with said valve (V), by means of a guide profile (WV), and wherein said cam interacts rollingly with said main rocker arm causing said valve displacement as a consequence of said main rocker arm swinging, wherein said variable valve actuation is obtained by means of - adjusting means (SPT, PT) arranged to relative move said fulcrum with respect to said cam; wherein said cam (CS) interacts directly with said main rocker arm and said fulcrum is movable, characterized in that said fulcrum is supported by a support piston (SPT, PT) of a hydraulic circuit; said piston (SPT) being pre-charged toward a complete distension by means of a spring (STS) arranged in a chamber (CH1) identified by said piston and wherein the hydraulic circuit further comprises an oil accumulator (ACC) connected with said chamber (CH1) by means of a branch pipe (BC), wherein a solenoid valve (SV) is arranged thereon in order to control oil flowing from/to said chamber (CH1) to/from said oil accumulator. - a cam (CS), - a valve (V) suitable to displace between a closed position and an open condition caused by a rotation of said cam, and further comprising a main rocker arm (MA) suitable to swing over a fulcrum (F), mechanically interacting with said valve (V), by means of a guide profile (WV), and wherein said cam interacts rollingly with said main rocker arm causing said valve displacement as a consequence of said main rocker arm swinging, wherein said variable valve actuation is obtained by means of and further comprising a main rocker arm (MA) suitable to swing over a fulcrum (F), mechanically interacting with said valve (V), by means of a guide profile (WV), and wherein said cam interacts rollingly with said main rocker arm causing said valve displacement as a consequence of said main rocker arm swinging, wherein said variable valve actuation is obtained by means of - adjusting means (SPT, PT) arranged to relative move said fulcrum with respect to said cam; wherein said cam (CS) interacts directly with said main rocker arm and said fulcrum is movable, characterized in that said fulcrum is supported by a support piston (SPT, PT) of a hydraulic circuit; said piston (SPT) being pre-charged toward a complete distension by means of a spring (STS) arranged in a chamber (CH1) identified by said piston and wherein the hydraulic circuit further comprises an oil accumulator (ACC) connected with said chamber (CH1) by means of a branch pipe (BC), wherein a solenoid valve (SV) is arranged thereon in order to control oil flowing from/to said chamber (CH1) to/from said oil accumulator. wherein said cam (CS) interacts directly with said main rocker arm and said fulcrum is movable, characterized in that said fulcrum is supported by a support piston (SPT, PT) of a hydraulic circuit; said piston (SPT) being pre-charged toward a complete distension by means of a spring (STS) arranged in a chamber (CH1) identified by said piston and wherein the hydraulic circuit further comprises an oil accumulator (ACC) connected with said chamber (CH1) by means of a branch pipe (BC), wherein a solenoid valve (SV) is arranged thereon in order to control oil flowing from/to said chamber (CH1) to/from said oil accumulator. <EOS>