Patent ID: 7188595

Claim:
A variable valve actuation device of an internal combustion engine, comprising: a cam shaft driven by a crankshaft of the engine, the cam shaft having a drive cam formed thereabout; a control shaft having a control cam formed thereabout, the control shaft changing its angular position in accordance with an operation condition of the engine; a valve actuating link including a bearing portion that bears the control shaft, a hook-shaped lower portion that surrounds the cam shaft keeping a given space therebetween and a cam portion that repeatedly pushes a valve pressing structure of an engine valve, the valve actuating link inducing an open/close operation of the engine valve when pivoting about a first imaginary pivot axis provided by the control shaft; a swing arm pivotal about a second imaginary pivot axis provided by the valve actuating link, the swing arm having a first end contacting the drive cam and a second end contacting the control cam; and a biasing member that biases the first end of the swing arm toward the drive cam and biases the second end of the swing arm toward the control cam, wherein when the angular position of the control shaft is changed, a valve lift degree of the engine valve is varied.