The transmission system, including a drive shaft, a driven shaft and a connecting device enabling the drive shaft to transmit mechanical torque to the driven shaft, and guide devices guiding the drive shaft in rotation about a drive axis and guiding the driven shaft in rotation about a driven axis. When the transmission system is at a standstill, the drive axis and the driven axis are misaligned, and they move closer to one another when the transmission system transmits torque from the drive shaft to the driven shaft.

A drive system for rotating a wheel of an aircraft landing gear is disclosed including a motor operable to rotate a drive pinion via a drive path; and a driven gear adapted to be attached to the wheel so as to be capable of rotating the wheel. The drive system has a drive configuration in which the drive pinion is capable of meshing with the driven gear to permit the motor to drive the driven gear via the drive path. The drive path includes a first compensating gear mounted on a common drive shaft with the drive pinion so as to be capable of rotating in tandem with the drive pinion, and a second compensating gear which is meshed with the first compensating gear.

A drive system for rotating a wheel of an aircraft landing gear is disclosed including a motor operable to rotate a drive pinion via a drive path; and a driven gear adapted to be attached to the wheel so as to be capable of rotating the wheel. The drive system has a drive configuration in which the drive pinion is capable of meshing with the driven gear to permit the motor to drive the driven gear via the drive path. The drive path includes a first compensating gear mounted on a common drive shaft with the drive pinion so as to be capable of rotating in tandem with the drive pinion, and a second compensating gear which is meshed with the first compensating gear. One of the drive pinion and the driven gear includes a roller gear having a series of rollers arranged to form a ring, each roller being rotatable about a roller axis, and the other of the dive pinion and the driven gear comprises a sprocket.

When a state of a vehicle is a predetermined state of the vehicle where vehicle vibration occurs, weak circulating torque is generated to fill backlash inside an automatic transmission and in a power transmission path by half-engaging a second clutch for establishing a second power transmission path while a first power transmission path remains established in the automatic transmission. A speed ratio of the second power transmission path is alternatively set to a lower vehicle speed-side speed ratio with respect to a speed ratio of the first power transmission path or a higher vehicle speed-side speed ratio with respect to the speed ratio of the first power transmission path in response to a traveling state. It is possible to generate weak circulating torque in a direction to increase an input shaft rotation speed or in a direction to reduce the input shaft rotation speed in accordance with the traveling state.

A method for assuring that a signal, for damping drive train vibrations, is overlaid during the same time period as the drive train vibration, and not delayed by one time period. The method comprises the steps of continuously calculating a correction torque for the vibration damping, determining, through a parallel signal path, whether the vibration damping is to be activated or deactivated, and overlaying the correction torque to the drive train vibration, if the necessity arises for activation of the vibration damping.

A product may include a first torque transfer element and a second torque transfer element that may be connected through a gear set. A housing may be provided wherein a damper may be connected between the gear set and the housing.

Vehicles, transmissions, and methods of dampening oscillations at an output shaft of a transmission are disclosed. A vehicle includes a chassis, a plurality of wheels coupled to the chassis, and a powertrain mounted to the chassis that includes a transmission. The transmission includes an input shaft to receive torque from a drive unit, an output shaft to transmit torque to a load, at least one torque-transmitting mechanism coupled between the input shaft and the output shaft, and a control system having an output speed sensor to provide an input signal indicative of a rotational speed of the output shaft and a controller communicatively coupled to the output speed sensor.

The transmission system, including a drive shaft, a driven shaft and a connecting device enabling the drive shaft to transmit mechanical torque to the driven shaft, and guide devices guiding the drive shaft in rotation about a drive axis and guiding the driven shaft in rotation about a driven axis. When the transmission system is at a standstill, the drive axis and the driven axis are misaligned, and they move closer to one another when the transmission system transmits torque from the drive shaft to the driven shaft.

Vehicles, transmissions, and methods of dampening oscillations at an output shaft of a transmission are disclosed. A vehicle includes a chassis, a plurality of wheels coupled to the chassis, and a powertrain mounted to the chassis that includes a transmission. The transmission includes an input shaft to receive torque from a drive unit, an output shaft to transmit torque to a load, at least one torque-transmitting mechanism coupled between the input shaft and the output shaft, and a control system having an output speed sensor to provide an input signal indicative of a rotational speed of the output shaft and a controller communicatively coupled to the output speed sensor.

A drive unit includes: an electric unit including a first electric motor for driving, a deceleration mechanism configured to transmit a rotation torque of the first electric motor to a drive wheel, a second electric motor configured to be driven by an internal combustion engine to generate electric power, and an acceleration mechanism configured to transmit a rotation torque of the internal combustion engine to the second electric motor. The first electric motor, the deceleration mechanism, the second electric motor, and the acceleration mechanism are housed in one housing.