A first sensor signal and a second sensor signal are provided by a sensor unit to an evaluation unit. The first sensor signal is dependent on the angular position and is associated with a first detection position, and the second sensor signal is associated with a second detection position lying about the rotational axis perpendicular to the first detection position. An orthogonal error is converted by the evaluation unit into an amplitude difference between respective amplitudes of the first and second sensor signals based on a coordinate transformation of the first and second sensor signals. Each of the first and second sensor signals are adjusted by the evaluation unit based on the amplitude difference. An angular position of a rotational component is determined by the evaluation unit based on output from an a tan 2-function that takes the adjusted first and second sensor signals as input.

A device having two mutually spaced sensor loops is provided. The device includes a magnetostrictive sensor structure coupled to a plurality of transmitters and a plurality of receivers, and along which a magnet that is secured to the rotating component moves. Each sensor loop has a shape corresponding to a rotating direction of the rotating component. Two saturation zones are in both sensor loops. Each transmitting element is provided for simultaneously coupling two current pulses in opposite direction into one respective sensor loop. Each receiving element is positioned to receive a reflected pulse by the magnet at the respective saturation zone. The receiving elements are connected to evaluation electronics configured to for determine an angular position of the rotating component based on transit times for the current pulse to travel along the respective sensor loop from the respective transmitting element to the respective saturation zone and for each reflected pulse to travel along the respective sensor loop from the respective saturation zone to the respective receiving element.

It is herein described a system and a corresponding method to carry out the selective coupling and uncoupling of an alternator in relation to an engine crankshaft pulley. The alternator is kept coupled or uncoupled depending on the detected battery charge, and both coupling and uncoupling are performed in two different steps and lagged in time, one step providing the electric coupling or uncoupling, and the other step providing the mechanical coupling or uncoupling.

A position detection device includes a magnetic detection element that is positioned radially outside a first clutch component portion and a second clutch component portion of a dog clutch around an axis. The magnetic detection element is provided between a first magnetic flux path portion and a second magnetic flux path portion. The magnetic detection element outputs a sensor signal indicating the direction of a magnetic flux passing between the first magnetic flux path portion and the second magnetic flux path portion. The magnetic detection element outputs a sensor signal indicating a position relationship between the first clutch component portion concerning a first hole portion as well as a first tooth portion and the second clutch component portion concerning the second hole portion as well as the second tooth portion, based on changes in magnetic flux directions depending on the position relationship in a rotation direction around the axis.

A torque limiter device includes an input shaft having a first contact surface and an output shaft having a second contact surface. The input and output shafts are operable in an engaged position and a disengaged position A biasing mechanism provides a bias force that mechanically biases the input and output shafts in one of the positions and sets a threshold torque. An electromagnet is arranged to selectively provide an electromagnetic force that opposes the bias force when an activation current is supplied. A controller determines a difference in rotations of the shafts and selectively supply the activation current to the electromagnet so as to disengage the input and output shafts when the rotation difference exceeds a threshold. Each of the contact surfaces comprises one or more grooves, wherein at least one rotatable member is disposed in at least one of said grooves.

A control device controls a torque transmission device. The torque transmission device includes an actuator that operates by being energized and a torque transmission portion that is switched to a transmission state or a non-transmission state by the actuator operating, and transmits a torque between a first transmission portion and a second transmission portion when the torque transmission portion is in the transmission state. The control device includes a target calculation unit, a mode determination unit, and a control unit. The target calculation unit calculates a target transmission torque that is a torque to be transmitted between the first transmission portion and the second transmission portion. The mode determination unit determines an operating mode among an engagement mode, a release mode, and a steady mode. The control unit controls the actuator based on the operating mode determined by the mode determination unit.

An electrohydraulic actuator assembly for use in a brake-by-wire hydraulic brake system. The electrohydraulic actuator assembly includes a pair of electrohydraulic actuator EHA units. One EHA unit provides fluid to front brakes and the other EHA unit provides fluid to rear brakes. Each EHA unit includes an electric motor, a reduction gear unit, a pair of magnetorheological clutches, and a pair of fluid pumps. The system further including an ECU that actuates the electric motor and controls engagement of the clutches to cause the fluid pump to pump brake fluid to at least one of the front and rear brakes. The system further includes a regeneration system for providing supplemental electricity to the electric motors.

Methods and systems for operating a driveline disconnect clutch actuator are provided. In one example, the driveline disconnect clutch actuator may be supplied with electric power to activate and deactivate a driveline disconnect clutch when electric power is available via a first power source. The driveline disconnect clutch actuator may be supplied with electric power to open the driveline disconnect clutch when output from the first driveline disconnect clutch is unavailable.

Methods and systems are provided for an electromagnetic pulse disconnect assembly. In one example, an electromagnetic disconnect assembly includes an electromagnetic coil assembly including an electromagnetic coil, an armature cam including an annular ring and a plurality of bidirectional cam ramps extending in an axial direction from the annular ring, where the annular ring is adapted to have face-sharing contact with the electromagnetic coil assembly when the electromagnetic coil is energized and be spaced apart from the electromagnetic coil assembly when the electromagnetic coil is de-energized, and a cam follower a plurality of radially extending guides arranged around a circumference of the cam follower and spaced apart from one another via a plurality of elongate apertures, each of the plurality of elongate apertures adapted to receive one of the plurality of bidirectional ramps of the armature cam. The assembly may further include a latching system.

A driving force transmission control device includes a driving force transmission device configured to press a friction clutch by an actuator and a controller configured to control the driving force transmission device. The controller calculates a torque command value indicating a driving force to be transmitted from a rotating member on an input side to a rotating member on an output side based on information of a vehicle. The controller sets an electric current command value according to a magnitude and an amount of time change of the torque command value. The electric current command value is a target value of an electric current. The controller performs electric current feedback control such that an electric current corresponding to the calculated electric current command value is supplied to the actuator.