| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve opening/closing period control device capable of rapidly locking a rotation phase of a driven-side rotating member to a driving-side rotating member, to a most retarded phase or a most advanced phase.SOLUTION: A locking mechanism 62 can lock a rotation phase in a most retarded phase, a lock recessed portion 60 in the most retarded phase is formed into the step shape including a recessed portion 60a for locking, to which a locking member 92b enters when it has the most retarded phase, and a recessed portion 60b for guiding, which is shallower than the recessed portion 60a for locking, and to which the locking member 92b can enter before having the most retarded phase. |
