Patent ID: 7284515

Claim:
A variable valve apparatus of an internal combustion engine, comprising: a cam shaft rotatably mounted to an internal combustion engine; a cam formed in the cam shaft; an oscillating cam swingably mounted to the internal combustion engine and having a cam surface which drives an intake valve or an exhaust valve; a transmission arm which is interposed between the oscillating cam and the cam and which transmits displacement of the cam to the oscillating cam; and a control shaft which is rotatably mounted to the internal combustion engine, swingably supports the transmission arm, enables a position at which the transmission arm comes in contact with the cam to be changeable by the rotation displacement, and enables the valve characteristics of the intake valve or exhaust valve to be controllable by the position change, a direction of a maximum load generated with respect to the control shaft during valve lift at an oscillating fulcrum of the transmission arm and a rotating direction of the control shaft when the control shaft is varied from the high valve lift side to the low valve lift side are set in the same direction.