The disclosure relates to a method of controlling a dog clutch by a DC motor configured to move the dog clutch via an actuator arm). The dog clutch including at least one gear having one or more dogs configured to engage one or more dogs of a sliding sleeve). The method includes supplying the DC motor with a pulse width modulated voltage having a duty cycle which is provided by a control algorithm). The control algorithm includes a trajectory planner generating a desired position of the actuator arm based on a 4.sup.th order trajectory planning algorithm and a motion controller based on the sliding mode theory for tracking the desired arm position.

A clutch assembly incorporated into a power transfer assembly (72) of a motor vehicle is presented. The clutch assembly includes a power-operated clutch actuator (306) for moving a clutch sleeve (354) axially between released and engaged positions between two rotatory members. In the released position, relative rotation between two rotary members is prevented. Whereas in the engaged position, relative rotation is permitted. The power-operated clutch actuator (306) further includes an electromagnetic solenoid with an output member having an extended condition and a retracted condition urging the clutch sleeve (354) between positions. A shift isolation linkage mechanism (304) interconnects the output member of the solenoid to the clutch sleeve (354) and permits movement of the output member to its retracted position while a blocked tooth condition inhibits movement of the clutch sleeve (354) to its engaged position. Once the blocked tooth condition is removed, the isolation linkage mechanism (304) forces the clutch sleeve (354) to its engaged position.

Methods and systems are provided for operating a vehicle that may be propelled via a primary axle and a secondary axle. In one example, a propulsion source of a secondary axle may be decoupled from at least one wheel via a dog clutch that includes teeth. The dog clutch may be disengaged in a way that reduces driveline noise and may reduce a possibility of driveline degradation.

Methods and systems are provided for operating a vehicle that may be propelled via a primary axle and a secondary axle. In one example, a propulsion source of a secondary axle may be decoupled from at least one wheel via a dog clutch that includes teeth. The dog clutch may be disengaged in a way that reduces driveline noise and may reduce a possibility of driveline degradation.

A drive mechanism for adjusting a position of a vehicle closure, with respect to a vehicle body, is provided. The drive mechanism may include a linear drive and a telescoping arrangement. The linear drive may include a spindle and a spindle nut and the telescoping arrangement may be coupled to the spindle nut and include a pair of gears coupled to one another. As the spindle rotates, the pair of gears may rotate to extend and retract translating portions of the telescoping arrangement in a telescoping manner such that the position of the vehicle closure may be adjusted.

A drive mechanism for adjusting a position of a vehicle closure, with respect to a vehicle body, is provided. The drive mechanism may include a linear drive and a telescoping arrangement. The linear drive may include a spindle and a spindle nut and the telescoping arrangement may be coupled to the spindle nut and include a pair of gears coupled to one another. As the spindle rotates, the pair of gears may rotate to extend and retract translating portions of the telescoping arrangement in a telescoping manner such that the position of the vehicle closure may be adjusted.

An electric powertrain includes a first electric motor that has an uninterrupted connection with a drive shaft of a vehicle. The electric powertrain further includes a second electric motor that has an interruptible connection with the drive shaft. In one form, this interruptible connection includes a clutch. The electric powertrain further includes a first gear train in the form of a first planetary gear and a second gear train in the form of a second planetary gear. The clutch in one variation includes a positive clutch in the form of a dog clutch. The dog clutch has a clutch suspension configured to deflect a clutch collar when gearing is misaligned during shifting.

An electric powertrain includes a first electric motor that has an uninterrupted connection with a drive shaft of a vehicle. The electric powertrain further includes a second electric motor that has an interruptible connection with the drive shaft. In one form, this interruptible connection includes a clutch. The electric powertrain further includes a first gear train in the form of a first planetary gear and a second gear train in the form of a second planetary gear. The clutch in one variation includes a positive clutch in the form of a dog clutch. The dog clutch has a clutch suspension configured to deflect a clutch collar when gearing is misaligned during shifting.

A portable power tool has a drive unit for rotationally driving a tool receptacle about an axis of rotation, the drive unit having at least one drive motor and a shiftable transmission, which is arranged in a transmission housing with an at least partially sleeve-like clutch housing and a transmission cover fastened thereto. The tool includes a shifting element for shifting the shiftable transmission between at least two different gears, and a locking sleeve for locking the shifting element in at least a first and a second shifting position is arranged in the clutch housing. The shiftable transmission forms, at least in the first shifting position, a cross-sectional plane perpendicular to the axis of rotation in which the locking sleeve is arranged at least regionally between the transmission cover and the shifting element and the shifting element is arranged at least regionally between the locking sleeve and the clutch housing.

A shifting group for a drive train of a motor vehicle for coupling and decoupling a drive shaft of a drive train as required, with an actuator for actuating a blocking element, a selector rod and a selector fork which is connected to the selector rod. The first drive shaft and the second drive shaft are arranged coaxially with respect to one another, the blocking element blocks an axial displacement of the selector rod in a first switching position and enables said axial displacement in a second switching position, the selector fork engages into a groove of one of the drive shafts, an actuation of the shifting group brings about an axial displacement of a drive shaft, and a clutch between the first drive shaft and the second drive shaft is opened or closed by way of the axial displacement of the selector fork.