| 摘要 |
PROBLEM TO BE SOLVED: To further surely move a moving member when it is necessary to move the moving member which can switch a parking lock state and a parking release state by moving in a first direction.SOLUTION: When it is necessary to move a piston rod and a piston, a switching element is controlled by using a prescribed frequency and a prescribed duty so that an energization current Ic of a coil of a magnetic part falls within a range which is larger than a prescribed current Ic1 and smaller than a prescribed current Ic2 over at least a prescribed time, that is, suction forces Fs of a permanent magnet and a flange part become smaller than a prescribed suction force Fs1 over at least the prescribed time.SELECTED DRAWING: Figure 5 |
