An engagement device includes: an engaged body configured to rotate in conjunction with a rotary shaft; an engaging body arranged coaxially with the engaged body and configured to engage with the engaged body by movement in an axial direction; a power source configured to provide thrust to the engaging body in the axial direction; and a hub member configured to couple the engaging body to a torque receiver which receives torque transmitted from the engaged body at a time the engaging body engages with the engaged body. The engaged body, the engaging body, and the power source are accommodated in a closed space, and the hub member is at least a part of an outer shell forming the closed space.

An engagement device includes: an engaged body configured to rotate in conjunction with a rotary shaft; an engaging body arranged coaxially with the engaged body and configured to engage with the engaged body by movement in an axial direction; a power source configured to provide thrust to the engaging body in the axial direction; and a hub member configured to couple the engaging body to a torque receiver which receives torque transmitted from the engaged body at a time the engaging body engages with the engaged body. The engaged body, the engaging body, and the power source are accommodated in a closed space, and the hub member is at least a part of an outer shell forming the closed space.

A control device for a vehicle is provided. The control device includes an electronic control unit that is configured to: exert the torque of an input member on a fixed member and a rotating member such that the fixed member and the rotating member are separated from each other, when the thrust is exerted for making the engagement teeth mesh with each other; estimate an inclination angle of tooth surfaces based on a relative movement amount between the fixed member and the rotating member, and a relative rotational amount between the fixed member and the rotating member; estimate a frictional coefficient of the tooth surfaces based on the inclination angle; and control the thrust of the actuator according to the frictional coefficient.

A system is configured to control a clutch that connects a first rotating body and a second rotating body. The system includes a biasing portion, an actuator, an energization device, and a control unit. The biasing portion permanently biases the clutch in a connecting direction. The actuator drives the clutch in a disconnecting direction. The energization device energizes the actuator. The control unit controls the energization device. The energization device outputs a first current value to the actuator when a connection of the clutch is detected even if a condition for permitting a disconnection is satisfied. The energization device outputs a second current value lower than the first current value when the condition for permitting the disconnection is satisfied and a disconnection of the clutch is detected.

A clutch assembly includes a pocket plate having a pocket and a teeter-totter strut retained in the pocket. The teeter-totter strut is pivotable to an engaged position in which an engagement face of the teeter-totter strut extends out from the pocket plate. The teeter-totter strut is pivotable from the engaged position to a disengaged position in which the engagement face of the teeter-totter strut does not extend out from the pocket plate. The clutch assembly is configured so that when a shock load force acts on the teeter-totter strut, the teeter-totter strut is prevented from moving into the engaged position.

A four-mode rocker clutch, including: a clutch gear supported for rotation around an axis of rotation; a housing; a first pawl including a portion disposed within the housing; a first actuator; a second pawl including a portion disposed within the housing; and a first resilient element. For a first one-way mode of the four-mode rocker clutch: the first actuator is arranged to hold the first pawl in contact with the clutch gear; the first pawl is arranged to block rotation of the clutch gear, with respect to the housing, in a first circumferential direction around an axis of rotation; and the first resilient element is arranged to hold the second pawl out of contact with the clutch gear.

A position detection device configured for use with a locking differential is configured to determine a position of an armature in relation to a stator. The stator has a primary coil. The armature moves relative to the stator between engaged and disengaged positions corresponding to the locking differential being in a locked and unlocked state. The position detection device includes a secondary coil disposed proximate to the primary coil. The secondary coil is configured to determine a change in inductance based on movement of the armature. The change in inductance is indicative of a change in position of the armature relative to the stator.

A position detection device configured for use with a locking differential is configured to determine a position of an armature in relation to a stator. The stator has a primary coil. The armature moves relative to the stator between engaged and disengaged positions corresponding to the locking differential being in a locked and unlocked state. The position detection device includes a secondary coil disposed proximate to the primary coil. The secondary coil is configured to determine a change in inductance based on movement of the armature. The change in inductance is indicative of a change in position of the armature relative to the stator.

A surgical instrument comprising a shiftable transmission is disclosed. The transmission comprises a mechanism for assuring that the transmission is in one of a plurality of predefined configurations.

Differential arrangement, e.g., for a drive axle of a motor vehicle. The differential arrangement comprises a drive wheel; a differential gear having an input part; a shift clutch operatively arranged between the drive wheel and the differential gear, wherein in the closed state of the shift clutch torque is transmitted from the drive wheel to the differential gear and in the open state of the shift clutch a torque transmission is interrupted. A first clutch part of the shift clutch is fixedly connected to the input part or to a differential housing of the differential gear, and a second clutch part of the shift clutch is fixedly connected to the respective other one of the input part and the differential housing.