Variable valve timing control device for internal combustion engine has spiral torsion spring compressed for pre-set part of its free length

摘要

The valve control and regulating device contains a rotary shaft (10, 20) on the cylinder head. a rotation transmitting element (30, 31, 40, 50) and a slide valve (70). A spiral torsion spring loads the shaft relative to the transmitting element. The torsion spring between the shaft and the transmission element is compressed for a pre-set part of its free length.