Variable valve timing device

摘要

A variable valve timing device according to the invention includes a rotation shaft and a rotation transmitting member rotatably mounted thereon. The device takes a locked condition and an unlocked condition when a locking pin (60) is inserted into and disengaged from a receiving bore (32) formed in the rotation shaft, respectively. To disengage the pin (60) from the receiving bore (32), a fluid is supplied to the base of the receiving bore (32) from an independent fluid passage (13).