Patent ID: 7290512

Claim:
A variable valve apparatus of an internal combustion engine, the variable vale apparatus comprising: a cam shaft rotatably provided to the internal combustion engine, a drive cam formed integrally with the cam shaft, and a rocker arm mechanism for transmitting an opening/closing operating force from an operating end portion thereof to an intake or an exhaust valve of the internal combustion engine by receiving the opening/closing operating force by a drive cam opposed roller brought into contact with the drive cam; wherein for displacing a lift time period, in which the drive cam opposed roller receives the opening/closing operating force by the rocker arm mechanism, frontward/rearward in a direction of rotating the drive cam, an up section of a cam lift face of the drive cam is formed to be longer than a down section thereof such that a change region of a lift valve closing time point of the lift time period becomes larger than a change region of a lift valve opening time point thereof.