A method of controlling brake clearance of a braking system of a vehicle includes providing a brake actuator, a brake input device, and a cross-drive transmission having an output and a brake pack. The method includes receiving a brake input request from the brake input device, actuating the brake actuator to apply the brake pack, and moving the brake actuator from a first position to a second position during the actuating step. The method also includes detecting an axial movement of the actuator from the first position to the second position, comparing the axial movement to a clearance threshold, and adjusting a return position of the brake actuator that is offset from the first position when the axial movement exceeds the clearance threshold. The method further includes controlling movement of the brake actuator from the second position to the return position.

A coupling and electromechanical control assembly and an electromechanical system for controlling the operating mode of a selectable clutch assembly are provided. The system includes a control member mounted for controlled rotation about a first axis. An actuator and transmission assembly includes a rotary output shaft and a set of interconnected transmission elements including a cam coupled to the output shaft to rotate therewith and a reciprocating member having a first end which rides in or on the cam to cause the reciprocating member to reciprocate upon rotation of the output shaft. A second end of the reciprocating member is coupled to the control member for selective, small-displacement, control member angular rotation about the first axis between different angular positions which correspond to different operating modes of the clutch assembly.

A shift range control device switches a shift range by controlling the drive of a motor. An angle calculation unit calculates a motor angle based on a motor rotation angle signal acquired from a motor rotation angle sensor detecting a rotational position of the motor. An acceleration calculation unit calculates a motor acceleration based on the motor angle. A moving average calculation unit calculates an acceleration moving average value as a moving average of at least one of a predetermined electrical angle cycle and a predetermined mechanical angle cycle of the motor acceleration. A drive control unit adopts the acceleration moving average value to control the drive of the motor such that the motor angle becomes a target motor angle value corresponding to a target shift range.

A method for determining reference values of a sensor is provided. The reference values correspond to a disengaged operating condition or to an engaged operating condition of a form-locking shift element (A, F). With the aid of the sensor, at least one operating parameter of the shift element (A, F) determinable during a disengagement and during an engagement of the shift element (A, F). A torque, an actuation force of the shift element (A, F), and a differential speed between shift-element halves of the shift element (A, F) are varied during the determination of the reference values of the sensor in such that the form-locking shift element (A, F) is transferred into the disengaged operating condition or into the engaged operating condition.

A method for automatic calibration of a position detection sensor of an automatic transmission including a gearshift actuator, the method including registering, using the position detection sensor, the position of the gearshift actuator upon power-up of the transmission; and performing a calibration of the position detection sensor if the registered position of the gearshift actuator is outside a predetermined expected position range of the gearshift actuator or within a predetermined abnormal position range of the gearshift actuator.

The present invention relates to a position learning system for an electric shift-by-wire system, which senses changes in the load of a motor according to operations of a four-stage detent plate and a detent spring to learn positions of shift stages of the electric shift-by-wire system, the position learning system including: a sensor for sensing the current generated from the motor; and a controller for receiving current data until a shift stage P is switched to a shift stage D or the shift stage D is switched to the shift stage P from the sensor, learning positions of shift stages R and N through the received current data, and performing offset operations on the basis of the learned positions of the shift stages R and N to learn positions of the shift stages P and D.

Methods and systems are provided for operating a powertrain or driveline of a hybrid vehicle that includes two electric machines and a transmission are described. In one example, vehicle propulsion is maintained while transmission operating parameters are determined for improving transmission operation. In particular, a rear drive unit maintains vehicle speed and monitors torque delivered via an output of the transmission.

The invention relates to a method for actuating an actuator (104) for a vehicle, wherein the actuator (104) is or can be coupled to a drive unit (106) for powering the actuator (104) and to a sensor (110) via a sensor gearing (108) for detecting a position and/or change in position of the sensor gearing (108). In the method, a sensor signal (114) is first input, which represents a position and/or change in position of the sensor gearing (108) detected by the sensor (110). The sensor signal (114) is used along with a gear ratio of the sensor gearing (108) in another step to determine actuator information representing a position and/or change in position of an actuator (104). Lastly, a suitable actuation signal (116) is generated on the basis of the actuator information to actuate the actuator (104).

A continuous variable planetary (CVP) system includes a CVP hub, which includes a shift mechanism including a shift driver element, and a processing server system to calibrate the CVP system and detect errors within the CVP system. The processing server system performs continuously monitoring or obtaining a transmission speed ratio of the CVP hub. Upon detecting that the transmission speed ratio reaches a particular value, the processing server system records a corresponding position of the shift driver. The processing server system calibrates the CVP system based on the particular value, the corresponding position, and a known relationship between transmission speed ratios and positions of the shift mechanism. The processing server system determines or verifies a full underdrive (FUD) position by iteratively reducing a transmission speed ratio from the particular value until an onset of a backlash condition is detected and determines or verifies a full overdrive (FOD) position.

A shift control device and method of controlling an axle assembly of a vehicle. The method includes electrically connecting a shift control device to the vehicle and commanding, with the shift control device, an actuator to move a coupling of the axle assembly to a neutral position, thereby disconnecting an electric motor from a wheel hub.