A position sensor system is useful for monitoring positions of shifters in transmissions and other applications. The position sensing system has an array of magneto resistive sensors and a controller configured to determine a position of a magnet along a path by triangulation. Some embodiments are relatively insensitive to fluctuations in a distance between the sensors and the path. Also described is an actuating assembly comprising a movable cylinder and a fixed rod. The actuating assembly may be applied for moving synchronizers or the like in power transmissions.

Method for regulating the control of an electrical wastegate actuator controlled via an H bridge to permit displacement of the wastegate in its closure and opening directions according to whether the current passes through the actuator in one or opposite direction, includes: determining a set position which the wastegate has to reach, and an activation time of the actuator defining a monitoring time; applying a control signal to the actuator to displace the valve into the set position; measuring the current passing through the H bridge and applying a correction factor to the current to obtain the motor torque; obtaining the displacement speed of the wastegate by integration of the motor torque; obtaining the position reached by the wastegate at the end of the monitoring time by integration of the speed; comparing the position reached with the set position; and repeating the method until the set position is reached.

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.

An electronic control unit starts shift initial oil pressure control after the completion of lockup initial oil pressure control when shift control is performed during the performance of lockup control, the electronic control unit starts shift initial oil pressure control after the completion of lockup initial oil pressure control. Besides, the electronic control unit places priority on the shift control and starts the lockup initial oil pressure control after the completion of the shift initial oil pressure control, when the lockup control is performed during the performance of the shift control. Therefore, the shift initial oil pressure control and the lockup initial oil pressure control are prevented from occurring at the same time when the shift control and the lockup control are performed at the same time.

A vehicle speed change arrangement that can perform automatic speed change using a manual transmission, including shift blocks such that a shift block of a reverse-1st speed, a shift block of 4th speed-5th speed, a shift block of 2nd speed-3rd speed, and a shift block of 6th speed are arranged in this sequence in a select operation direction. The arrangement also includes first to fourth shift levers for shifting the shift blocks, select actuators for selecting the first to fourth shift levers, a first shift actuator for shifting the first or second shift lever, a second shift actuator for shifting the third or fourth shift lever, a gear disengagement determination unit for determining whether a gear is disengaged when the gear engagement or disengagement is made using the first and second shift actuators, and a drive unit for driving the gear engaging shift actuator when gear disengagement is determined.

A vehicle speed change arrangement that can perform automatic speed change using a manual transmission, including shift blocks such that a shift block of a reverse-1st speed, a shift block of 4th speed-5th speed, a shift block of 2nd speed-3rd speed, and a shift block of 6th speed are arranged in this sequence in a select operation direction. The arrangement also includes first to fourth shift levers for shifting the shift blocks, select actuators for selecting the first to fourth shift levers, a first shift actuator for shifting the first or second shift lever, a second shift actuator for shifting the third or fourth shift lever, a gear disengagement determination unit for determining whether a gear is disengaged when the gear engagement or disengagement is made using the first and second shift actuators, and a drive unit for driving the gear engaging shift actuator when gear disengagement is determined.

A shift device includes: a shift switching member including valley portions corresponding to shift positions; a motor including a rotor and a stator and configured to drive the shift switching member; a first drive system including a first control unit configured to control a voltage for driving the motor; a second drive system provided separately from the first drive system and including a second control unit configured to control a voltage for driving the motor; and a positioning member configured to establish the shift positions in a state in which the positioning member is fitted into any one of the valley portions of the shift switching member. The shift device acquires the shift positions when the motor is driven by the voltage output from one of the first and second drive systems to move the positioning member such that the positioning member continuously passes through the valley portions.

A transmission includes first and second input shafts connected via a first clutch to a power source, an output shaft, a first shift gear group including shift gears arranged between the first input and output shafts, a first switching mechanism including a synchronizer for selecting one shift gear from the group, a second shift gear group including shift gears arranged between the second input shaft and the output shaft, and a second switching mechanism including a synchronizer for selecting one shift gear from the group. In order to learn a synchronizer balk position, either the first or second shift gear group, where no targeted synchronizer belongs, is set to any shift gear, both the first and second clutches are engaged, the balk position of the synchronizer is detected in a process of the targeted synchronizer being slid, and information specifying the detected position is stored.

An actuator system comprising a shared link arranged to pivot about a first axis relative to a reference structure, a controlled element arranged to pivot about a second axis relative to the reference structure, a first member arranged to pivot about a third axis relative to the shared link and a fourth axis relative to the controlled member, a first actuator arranged to control a first variable distance between the third axis and fourth axis, a second member arranged to pivot about a fifth axis relative to the shared link and a sixth axis relative to the controlled element, a second actuator arranged to control a second variable distance between the fifth axis and the sixth axis, the system configured such that a change in the first variable distance causes rotation of the controlled element about the second axis when the second variable distance is constant and vice versa.

A hydraulic unit and an electromagnetic unit are disposed in directions that are orthogonal to each other. The electromagnetic unit is configured such that a solenoid shaft is held when a coil is energized, and such that movement of the solenoid shaft toward the right side in the drawing is allowed during movement of the piston rod when the coil is not energized. When a hydraulic pressure for a piston is reduced with the coil not energized in a parking unlocked state, switching is performed to a parking locked state with a piston rod moved downward in the drawing while moving the solenoid shaft rightward in the drawing through abutment between a roller of a pin of the piston rod and a distal end portion of the solenoid shaft.