A controller according to an embodiment that controls a control object by driving a motor includes an estimation unit and a switching unit. The estimation unit estimates a load of the control object on the basis of a value of a current applied to the motor. The switching unit switches control contents between learning control in which learning is performed on the basis of the load estimation and normal control other than the learning control. The control contents in the learning control cause the current fluctuation in the learning control to be further reduced than that in the normal control using other control contents.

A disconnect system for selectively coupling or disconnecting a drive member and a driven member. The disconnect system includes a clutch ring rotationally coupled to a drive member, a solenoid actuator, and a clutch ring configured to be moved by the solenoid actuator to selectively transition the clutch ring between an engaged position where the clutch ring is rotationally coupled to a driven member and a disengaged position where the clutch ring is disconnected from the driven member. A controller can be provided to control the axial velocity of the clutch ring (e.g., relative to the rotational axis thereof) to reduce unwanted noise, vibrations, or harshness that can occur during the transition between engaged and disengaged positions.

A driving force transmission control apparatus includes: a driving force transmission device that includes an electromagnetic clutch mechanism configured to generate a frictional force between clutch plates by energization of an electromagnetic coil and transmits a driving force by actuating the electromagnetic clutch mechanism; and a control device that controls the driving force transmission device. The control device includes a storage unit storing a hysteresis value representing the difference between a current value required to transmit a predetermined torque when an energization current to the electromagnetic coil is gradually increased and a current value required to transmit the predetermined torque when the energization current is gradually reduced, a torque command value calculator that calculates a torque command value, and a current command value calculator that calculates a current command value representing a target value of a current to be supplied to the electromagnetic coil based on the torque command value and the hysteresis value.

A method for operating a drive train for a motor vehicle, with at least one primary drive axle and at least one secondary drive axle, which are operatively connected to each other via a clutch to an adjustable transmission torque. At the same time it is provided that a vibration amplitude of a vibration of the drive train is determined and in a damping operation type of the drive train, the transmission torque is determined from the vibration amplitude and adjusted on the clutch.

A microcomputer of a driving force distribution control device detects a maximum current value among values of an upper current acquired during a predetermined period, and determines that an overcurrent abnormality has occurred in the driving force distribution control device when the maximum current value is equal to or larger than an abnormal current threshold value and a time, for which the maximum current value is equal to or larger than the abnormal current threshold value, is equal to or larger than an abnormality detection time. Then, the microcomputer performs off control to turn off a relay, and notifies a driver of occurrence of the overcurrent abnormality using a notification unit.

A method for controlling creep driving of a vehicle may include determining, by a controller for controlling a dry clutch, whether transfer torque of the dry clutch is 0 or less and a control error resulting from subtraction of a current car speed from a target creep speed is 0 or less, which is referred to as a step of determining condition, and stopping, by the controller, accumulation of an integral control component for creep controlling if the condition in the step of determining condition is met, which is referred to as a step of stopping accumulation.

A method for controlling creep driving of a vehicle may include determining, by a controller for controlling a dry clutch, whether transfer torque of the dry clutch is 0 or less and a control error resulting from subtraction of a current car speed from a target creep speed is 0 or less, which is referred to as a step of determining condition, and stopping, by the controller, accumulation of an integral control component for creep controlling if the condition in the step of determining condition is met, which is referred to as a step of stopping accumulation.