A shift range control apparatus switches a shift range by controlling a motor. The shift range control apparatus includes an angle calculator, a speed calculator and a drive controller. The angle calculator calculates a motor angle based on a detected value of a rotational angle sensor. The speed calculator calculates a motor rotational speed based on the detected value of the rotational angle sensor. The drive controller executes a stationary phase energization control to stop the motor in response to the motor angle reaching a stationary phase energization start position. The drive controller sets a stationary energization phase being a stationary phase of the motor in the stationary phase energization control, according to the motor rotational speed when the motor angle reaches the stationary phase energization start position.

A shift range control apparatus switches a shift range by controlling a motor. The shift range control apparatus includes an angle calculator, a speed calculator and a drive controller. The angle calculator calculates a motor angle based on a detected value of a rotational angle sensor. The speed calculator calculates a motor rotational speed based on the detected value of the rotational angle sensor. The drive controller executes a stationary phase energization control to stop the motor in response to the motor angle reaching a stationary phase energization start position. The drive controller sets a stationary energization phase being a stationary phase of the motor in the stationary phase energization control, according to the motor rotational speed when the motor angle reaches the stationary phase energization start position.

A shift range control apparatus controls a shift range switching system that switches shift ranges by controlling driving of a motor. This control apparatus calculates a motor angle based on a motor rotation angle signal, acquires an output shaft signal based on a rotation position of an output shaft from an output shaft sensor, sets a target rotation angle based on a target shift range and the output shaft signal, and controls driving of the motor such that the motor angle becomes the target rotation angle. The control apparatus sets the target rotation angle to a target limit value, in response to the target rotation angle that is set based on the output shaft signal being a value at which rotation occurs that is further toward a back side in a rotation direction than the target limit value that is set based on shift ranges before and after switching.

A shift range control apparatus controls a shift range switching system that switches shift ranges by controlling driving of a motor. This control apparatus calculates a motor angle based on a motor rotation angle signal, acquires an output shaft signal based on a rotation position of an output shaft from an output shaft sensor, sets a target rotation angle based on a target shift range and the output shaft signal, and controls driving of the motor such that the motor angle becomes the target rotation angle. The control apparatus sets the target rotation angle to a target limit value, in response to the target rotation angle that is set based on the output shaft signal being a value at which rotation occurs that is further toward a back side in a rotation direction than the target limit value that is set based on shift ranges before and after switching.

A transmission structure of electric clutchless motorcycle includes an electric motor, a variable speed gear set, a variable speed gear box and a gear position sensing unit. The arrangement of the gear position sensing unit is so configured that the transmission structure of electric clutchless motorcycle mechanism not only maintains the inertial energy recharge of the electric motor to increase the endurance of the vehicle, but also allows the driver to accurately control the speed control knob when switching gears, and furthermore can increase the automatic gear shift function of the electric gear shift design.

A transmission structure of electric clutchless motorcycle includes an electric motor, a variable speed gear set, a variable speed gear box and a gear position sensing unit. The arrangement of the gear position sensing unit is so configured that the transmission structure of electric clutchless motorcycle mechanism not only maintains the inertial energy recharge of the electric motor to increase the endurance of the vehicle, but also allows the driver to accurately control the speed control knob when switching gears, and furthermore can increase the automatic gear shift function of the electric gear shift design.

A shift device includes: a shift switching member including valley portions provided so as to correspond to shift positions; a positioning member causing the shift position to be established while being fitted in any of the valley portions of the shift switching member; a motor driving the shift switching member and including a rotor and a stator; a driving force transmission mechanism transmitting a driving force from the motor to the shift switching member; and a rotor rotation angle sensor and an output shaft rotation angle sensor detecting rotation angles of the rotor and the shift switching member. The shift device corrects a deviation from a center of a preset backlash when a backlash width included in the driving force transmission mechanism detected based on output values of the output shaft rotation angle sensor and the rotor rotation angle sensor is a value or more during a shift switching operation.

A shift device includes: a shift switching member including valley portions provided so as to correspond to shift positions; a positioning member causing the shift position to be established while being fitted in any of the valley portions of the shift switching member; a motor driving the shift switching member and including a rotor and a stator; a driving force transmission mechanism transmitting a driving force from the motor to the shift switching member; and a rotor rotation angle sensor and an output shaft rotation angle sensor detecting rotation angles of the rotor and the shift switching member. The shift device corrects a deviation from a center of a preset backlash when a backlash width included in the driving force transmission mechanism detected based on output values of the output shaft rotation angle sensor and the rotor rotation angle sensor is a value or more during a shift switching operation.

An actuator for the actuation of at least one movable member of a motor vehicle transmission. The actuator includes a housing, at least one electric motor having a stator and a rotor mounted on a rotor shaft extending along an axis X1, a motor pinion fixed to the opposite end of the shaft from the rotor, a circuit board for supplying power to the stator and controlling the electric motor, and a reduction mechanism driven by the motor pinion. The housing defines a first volume in which the electric motor and the circuit board are received. The circuit board is located axially along the axis X1 between the electric motor and the motor pinion. The actuator further includes a cover defining a second volume in which the reduction mechanism is received, the housing and the cover each have guides for guiding the reduction mechanism.

An actuator for the actuation of at least one movable member of a motor vehicle transmission. The actuator includes a housing and a cover defining an internal volume in which are received at least one electric motor having a stator and a rotor mounted on a rotor shaft extending along an axis X1, a motor pinion fixed to the opposite end of the shaft to the rotor, a reduction mechanism driven by the motor pinion, a pin mounted so as to be able to rotate at the end of a shaft extending along an axis X3 and able to be engaged in the movable member of the transmission. The shaft of the pin is rotationally guided by a rolling bearing and a slide bearing.