A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

The present invention provides a method of controlling input torque of a powered vehicle. The vehicle includes a transmission having an input shaft, an output shaft, and a countershaft. The method includes providing input torque to the input shaft, determining a rotational acceleration of the countershaft, and measuring vehicle speed. The method also includes determining a threshold based on the measured vehicle speed. The measured countershaft acceleration is compared to the threshold and the input torque is controlled based on the result of the comparison.

A method for reducing vibration of a drive shaft of an eco-friendly vehicle includes calculating a model velocity of the drive shaft, obtaining a vibration component based on a deviation between an actual velocity of the drive shaft and the calculated model velocity, and generating a vibration reduction compensation torque for reduction in vibration of the drive shaft from the vibration component.

A traction control system configured to limit slip by a machine having a work implement including a machine motion sensor configured to determine a motion of the machine, a work implement unit configured to determine whether the work implement is in an operational state, a powertrain motion sensor configured to determine a motion of a powertrain component, and a machine powertrain controller configured to determine slip by comparing the motion of the machine to the motion of the powertrain component, wherein the machine powertrain controller is configured to command a torque reduction to the powertrain component when slip is determined.

A method for operating a drive train of a motor vehicle for a reversing operation for changing from a forward gear to a reverse gear or vice versa when the motor vehicle is rolling at a speed less than a limit value, and in which a first shift element of the transmission is disengaged and a second shift element of the transmission is engaged, the method including receiving a target torque profile for a transmission output shaft for the reversing operation. The method further includes determining, based on the target torque profile for the transmission output shaft, target torque profiles for the first and second shift elements and the propulsion unit. Additionally, the method includes activating the first and second shift elements and the propulsion unit based on the respective target torque profile such that an actual torque profile follows the target torque profile for the transmission output shaft.

Aspects of the present invention relate to method and to a control system for compensating for variable inertia in a vehicle powertrain, the method comprising: determining whether a torque source is coupled to a wheel; and applying a torque change in dependence on angular acceleration associated with the torque source, in dependence on whether the torque source is coupled to the wheel.