Patent ID: 8307806

Claim:
Device for actuating a decompression engine brake in an internal combustion engine, said internal combustion engine comprising: one or more cylinders in line, each provided with one or more exhaust valves; respective rocker arms and hydraulic tappets connected to said exhaust valves; said rocker arms being provided with a common axis for each cylinder; a cam axis for said one or more cylinders in line, characterized in that it comprises: at least one additional rocker arm, for each cylinder, pivoting about said common axis and suitable to engage with a corresponding additional cam arranged on said cam axis; at least one actuator system for said additional rocker arm, for each cylinder suitable to move said rocker arm between a first position wherein said rocker arm is not engaged against said additional cam thus determining a deactivated engine brake condition, and a second position wherein said rocker arm is engaged against said additional cam thus determining an activated engine brake condition; wherein said actuator system of said additional rocker arm for each cylinder comprises at least an additional shaft provided with one or more additional cams suitable for determining the movement of said rocker arm for each cylinder so that in a first position of said additional shaft, said additional rocker arm is in contact with said one or more additional cams determining the activation of said engine brake.