A vehicle driveline component having a housing, first and second shafts supported by the housing for rotation about a rotary axis, a two-speed transmission in a power transmission path between the first and second shafts, a shift fork and a failsafe spring. The two-speed transmission has a movable member that is movable along the rotary axis between a high-speed position, in which the two-speed transmission operates in a first gear ratio, and a low-speed position in which the two-speed transmission operates in a second gear ratio that provides a higher speed reduction between the first and second shafts than the first gear ratio. The shift fork is coupled to the movable member for movement therewith along the rotary axis. The failsafe spring is disposed coaxially about the rotary axis and biases the movable member toward the high-speed position.

A range switching apparatus of a shift-by-wire system has: a main motor; a deceleration mechanism that amplifies torque generated by the main motor; an output shaft that outputs the torque amplified by the deceleration mechanism; an auxiliary motor; and an emergency drive mechanism. The emergency drive mechanism is disposed on the auxiliary motor shaft of the auxiliary motor, and that is connected to or disconnected from the deceleration mechanism by driving of the auxiliary motor. The emergency drive mechanism transfers output of the auxiliary motor to the deceleration mechanism, and rotates the output shaft by being connected to the deceleration mechanism.

A continuously variable powertrain device for a work vehicle includes a continuously variable transmission to output a continuously shifted motive power while continuously varying a speed of a motive power received from an engine, a planetary transmission to receive the motive power from the engine and the continuously shifted motive power and to output a compound motive power, a planetary clutch to switch a shift level of the planetary transmission a forward-reverse direction switch to receive the compound motive power and to output either a forward motive power or a reverse motive power, rotation detectors, and a powertrain controller.

A work vehicle includes a controller configured or programmed to include an input revolutions number calculator to calculate an input revolutions number, and a vehicle speed controller switchable between a first vehicle-speed control mode and a second vehicle-speed control mode. In the first vehicle-speed control mode, the vehicle speed controller is configured or programmed to control a vehicle speed of the work vehicle based on a value detected by an input rotation sensor. In the second vehicle-speed control mode, the vehicle speed controller is configured or programmed to control the vehicle speed based on a value calculated by the input revolutions number calculator.

A vehicle includes a transmission which has a first oil pump driven by rotation of a drive source that drives a drive wheel and a second oil pump provided with a check valve on a suction side and driven by a motor. In a vehicle control device for controlling the vehicle, a minimum value of a drive current value of the motor is defined as a first current value, when the second oil pump is driven in a normal drive state, and a minimum rotation speed of the drive source is increased compared to a case in which the drive current value of the motor is equal to or larger than the first current value, when an automatic downshift control for automatically downshifting a speed ratio of the transmission is executed in a case in which the drive current value of the motor is smaller than the first current value when the second oil pump is driven.

A continuously variable transmission, a transmission control system, and a method is provided. The control system is configured to determine whether a predetermined condition is met for applying a clutch critical pressure to an applied clutch. The clutch critical pressure is less than line pressure and is a pressure at which the clutch may slip upon experiencing a predetermined torque disturbance level. The control system is configured to command the clutch critical pressure to be applied to the clutch if the predetermined condition is met. The control system is further configured to determine whether the clutch is slipping beyond a predetermined threshold, and if the clutch is slipping beyond the predetermined threshold, command a clutch slip control scheme to be applied to the clutch that is configured to bring a clutch slip of the clutch under the predetermined threshold.

A shift range control device switches a shift range by controlling driving of an actuator. A plurality of control units are configured to control the driving of the actuator. A plurality of monitoring control units are correspondingly provided for the plurality of control units, and configured to monitor the corresponding control units. The driving of the actuator is controlled by one of the control units, which is in a normal state. When an abnormality occurs in the one of the control units being used to control the driving of the actuator, the one is switched to another one of the control units to control the driving of the actuator.

A drive device includes a superposition transmission, a main drive machine connected to an input shaft of the transmission, auxiliary drives and an output shaft of the transmission connectable to a work machine. The transmission has a planetary transmission with an internal gear, sun gear, planet carrier and planet gears. The input shaft is connected to the internal gear, the output shaft is connected to the sun gear, and the auxiliary drives are connected by a first transmission stage with constant transmission ratio to the planet carrier. An auxiliary drive connection with constant transmission ratio is between the auxiliary drive and the internal gear or a pinion on the input shaft. A switchable clutch in the auxiliary drive connection can activate or interrupt the auxiliary drive connection, so that upon interruption, the connection between auxiliary drive and planet carrier remains activated by the clutch through the first transmission stage.

A drive device includes a speed modulation gearbox having a planetary gear mechanism and a casing, a main drive machine which is connected to an input shaft of the speed modulation gearbox, two auxiliary drives, each connected to the planetary gear mechanism via a drive connection. An output shaft of the speed modulation gearbox can be connected to a working machine. The planetary gear mechanism includes a ring gear, a sun gear, a planet carrier and several planet gears. For each auxiliary drive, an additional drive connection with a constant transmission ratio exists between the auxiliary drives and the input shaft or between the auxiliary drives and a driven shaft of the planetary gear mechanism. The additional drive connections can each be engaged or disengaged by a respective switching clutch, wherein the drive connections from the auxiliary drives to the speed modulation gearbox remain engaged in any case.

A vehicle shift-by-wire device includes: a casing in which the shift actuator is disposed; a coupling member; and a connecting/disconnecting member disposed in the casing movably in the shifting direction and movably in a connecting/disconnecting direction crossing the shifting direction, and moved in the shifting direction integrally with the coupling member, wherein when the connecting/disconnecting member is held at an electrically shifting position in the connecting/disconnecting direction, the connecting/disconnecting member is coupled to the shift actuator and is moved in the shifting direction by the shift actuator to switch the shift corresponding position of the shift position switching mechanism via the coupling member, and wherein when the connecting/disconnecting member is moved to a manually shifting position in the connecting/disconnecting direction, the connecting/disconnecting member coupled to the shift actuator is disconnected so that the shift actuator is disabled to switch the shift corresponding position of the shift position switching mechanism.