Patent ID: 7565887

Claim:
A valve actuation device of an internal combustion engine, comprising: a cam shaft having thereon at least first and second cams that are different in profile; a first rocker arm that is in contact with the first cam to be swung, the first rocker arm being adapted to actuate an engine valve; a second rocker arm that is in contact with the second cam to be swung; a coupling mechanism that selectively couples and uncouples the first and second rocker arms; and an electric actuating mechanism that actuates the coupling mechanism with an electric power for the selective coupling and uncoupling, wherein the coupling mechanism comprises: a control shaft, having an axis, that is rotated about its axis by the electric actuating mechanism; a control cam integrally formed on the control shaft; a plunger that is axially moved with one end thereof slidably contacting the control cam; and a lock mechanism that induces a mutually locked condition between the first and second rocker arms when the plunger is moved axially in one direction and a mutually unlocked condition between the first and second rocker arms when the plunger is moved axially in the other direction.