A method for controlling rollback of a work vehicle may include receiving a signal indicating that a pedal of the work vehicle has been depressed, wherein the work vehicle is initially traveling in a first direction up an inclined surface such that at least one clutch of the transmission is engaged. In addition, the method may include reducing a pressure within the at least one clutch after receiving the signal in order to decelerate the work vehicle in the first direction and engaging a parking brake of the work vehicle as the work vehicle reverses direction and travels in a second direction down the inclined surface.

A method of releasing a stuck vehicle, in which a stuck situation is recognized and a rocking-free process is initiated and continued until the rocking-free process is suppressed. The rocking-free process is suppressed either after the activation of a parking brake of the vehicle, which was inactive at the beginning of and during the rocking-free process, for a predetermined time interval, or after the registration of a limit value of a deflection of a drive pedal of the vehicle and after the limit value of the deflection of the drive pedal is maintained or exceeded for a predetermined time interval, or after a vehicle speed falls to almost zero km/h, a minimum actuation of a drive pedal of the vehicle is registered, the vehicle speed is maintained for a predetermined time interval and the minimum actuation is maintained for the predetermined time interval.

A work vehicle includes a variable displacement hydraulic pump driven by an engine, a hydraulic motor forming a closed circuit with the pump and driven by hydraulic fluid discharged from the pump, wheels driven by the motor to allow the work vehicle to travel, a selector detecting an operating state of a switch switching the traveling of the work vehicle between forward and backward, and a controller. When the selector detects a reversal operation of the switch to reverse the traveling direction when the work vehicle travels, the controller sets relationship between the vehicle speed of the work vehicle and the upper limit of the rotational speed of the engine such that the upper limit increases as the absolute value of the vehicle speed approaches zero. The controller obtains an upper limit of the rotational speed from the relationship and a vehicle speed of the work vehicle.

A required traction force determining part is configured to determine a required traction force corresponding to an output rotational speed based on a required traction force characteristic. A command torque determining part is configured to determine a command torque to be transmitted to a motor to obtain the required traction force. An opposite movement determining part is configured to determine that a vehicle is oppositely moving when a vehicle speed becomes a predetermined speed threshold or greater in a direction opposite to a moving direction corresponding to a position of a forward/rearward movement operating member. A traction force assisting part is configured to perform a traction force assisting control when it is determined that the vehicle is oppositely moving. The traction force assisting part is configured to increase the required traction force in the moving direction corresponding to the position of the forward/rearward movement operating member.

A vehicle system and method that implements a cycle to vehicle wheels for freeing a vehicle from a stuck condition is provided. The vehicle system includes a drive unit and controller. The drive unit provides a drive toque through a transmission to at least one wheel of the vehicle wheels for propelling the vehicle. The controller has a rock cycle module that determines a torque, a gear shift strategy and a frequency output based on vehicle inputs including wheel speeds of the vehicle wheels. The controller determines whether the rock cycle has been initiated and determines a surface type the vehicle is encountering. A first torque is selected at a torque module. A first gear shift strategy is selected at a gear module. A first frequency is selected at a frequency module. The selected torque, gear shift strategy and frequency are implemented at the drive unit, transmission and vehicle wheels.

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.

A method is disclosed for controlling a change in the direction of travel of a working vehicle between forward travel and rearward travel or vice versa. The working vehicle has an electronically controllable hydrostatic travel drive, a power-operated brake system with at least one electronically controllable brake circuit, and an electronic brake-control unit for controlling the travel drive and the brake circuit. While the vehicle is traveling in a first direction, a change in the direction of travel is triggered by a switchover of the hydrostatic travel drive by means of an assigned manual operating element. To reduce the mechanical loading, the deceleration of the working vehicle can be assisted by automatically actuating the brakes of the electronically controllable brake circuit, where these brakes are actuated by being triggered by the switchover of the operating element and are released by the time the vehicle comes to a standstill.

A vehicle traveling control apparatus includes a surrounding environment recognition device, a vehicle state recognition device, and a traveling control unit. The surrounding environment recognition device acquires surrounding environment data regarding a vehicle. The vehicle state recognition device acquires state data regarding the vehicle. The traveling control unit executes a traveling control of the vehicle, based on the surrounding environment data and the state data. When the traveling control unit recognizes, based on the surrounding environment data, that the vehicle is parked or stopped in a parking lot and that a road surface in a surrounding region of a parking or stopping position of the vehicle is in a snow accumulation situation, the traveling control unit executes a region generation traveling control that is the traveling control of generating a boarding or alighting region for an occupant of the vehicle in the surrounding region of the parking or stopping position.

A computer system for a vehicle combination comprising a truck and at least one trailer comprising processing circuitry. The processing circuitry is configured to: obtain information pertaining to a current truck drive mode from the truck, determine a suitable trailer drive mode, wherein the suitable trailer drive mode is determined among a plurality of predefined trailer drive modes, wherein the determination is based on the obtained current truck drive mode; and set the at least one trailer in the determined trailer drive mode.