Patent ID: 8459219

Claim:
A variable valve device comprising: a drive shaft configured to rotate in synchronization with a crankshaft of an engine; a drive cam provided on the drive shaft; a rocker cam pivotally supported on the drive shaft; an engine valve configured to be driven to open and close by the rocker cam; a rocker shaft disposed parallel to the drive shaft; a rocker arm pivotally supported on the rocker shaft; a first link that links the rocker arm and the drive cam; a second link that links the rocker arm and the rocker cam; and a rocker shaft position modifying section configured to modify a position of the rocker shaft relative to the drive shaft to control an operating angle and a lift of the engine valve, wherein the rocker shaft position modifying section is configured to modify the position of the rocker shaft relative to the drive shaft such that a variation of a maximum lift of the engine valve per unit change of the operating angle within a predetermined operating angle range of the engine valve is suppressed as compared to a variation of a maximum lift of the engine valve per unit change of the operating angle outside of the predetermined operating angle range.