Control device for selectable one-way clutch

A control device for a selectable one-way clutch, the selectable one-way clutch comprising:

• a pocket plate including a plurality of housing recesses on one surface thereof;
• engagement members housed in the respective housing recesses;
• elastic members disposed between bottoms of the respective housing recesses and the engagement members and configured to bias the engagement members;
• a notch plate configured to rotate relative to the pocket plate and including a plurality of engagement recesses on a surface that faces the one surface of the pocket plate;
• and
• a selector plate disposed between the pocket plate and the notch plate, having a plurality of openings that penetrates the selector plate in a thickness direction, and configured to rotate coaxially with a rotation axis of the notch plate to change over between a first state and a second state, the first state allowing the engagement members to pass through the respective openings and to stand up from a side close to the pocket plate toward a side close to the notch plate, the second state allowing the housing recesses to house the respective engagement members,
• wherein the control device for the selectable one-way clutch comprises a motion detection unit configured to detect a motion of the selector plate, and
• when the motion detection unit detects an unintended motion of the selector plate,
• the control device causes the pocket plate and the notch plate to rotate differentially at a rotation speed equal to or less than a predetermined absolute value, and
• the control device controls the selectable one-way clutch to fall into a state of ratchet where the engagement members and the engagement recesses do not engage with each other by differential rotation of the pocket plate and the notch plate in a positive direction, or into a state of overrun where the engagement members and the engagement recesses do not engage with each other by differential rotation of the pocket plate and the notch plate in a negative direction.