Abstract: A method for operating an automated drive train of a motor vehicle in which, upon actuation of a service brake up to a standstill of the vehicle, a drive connection between the drive machine and at least one drive axle of the vehicle is automatically disengaged by disengaging a clutch. During release of the service brake, the drive connection is automatically engaged by engaging the clutch. Based on a selected gear step, a desired drive direction of the vehicle is determined, and, during the release of the service brake, is compared with an actual drive direction. If the desired drive direction matches the actual drive direction, the pressure in the clutch is increased according to a first modulation characteristic curve. However, if the desired drive direction is different from the actual drive direction, the pressure in the clutch is increased according to a second modulation characteristic curve.

Abstract: A method for operating a drive train of a motor vehicle in an inclined position, in particular an agricultural or municipal utility vehicle. A connection between a prime mover and at least one drive axle of the motor vehicle is automatically disconnected as part of a function upon actuation of a service brake for stopping the motor vehicle monitored by at least one sensor. To avoid uncontrolled backward rolling, provision is made that a maximum brake pressure applied to achieve or maintain the standstill of the motor vehicle is determined and monitored by continually measuring a brake pressure applied by the service brake. Upon the brake pressure falling below the maximum brake pressure minus a pre-definable pressure difference, the function is automatically deactivated and thus the connection is automatically re-established between the prime mover and the at least one drive axle.

Abstract: A method of operating a drive-train of a vehicle having a drive engine, a motor vehicle transmission, at least one drive axle and a further axle that can be engaged to drive. In context of a function, a connection between the drive engine and the at least one drive axle of the vehicle is automatically interrupted, and the function is automatically activated when certain conditions exist. For the activation of the function, a service brake of the vehicle must be actuated and, as a condition, the vehicle must be stopped. To check whether operation of the vehicle in the all-wheel mode is necessary, when the function is carried out, a brake pressure is determined and, if the brake pressure exceeds a brake pressure limit value, the driving engagement of the further axle is carried out automatically as the function is deactivated for re-starting the vehicle.

Abstract: A method for starting a vehicle having a start-stop system, a bake pedal for braking, a pressure controlled clutch, an accelerator for setting an engine speed, and a control unit for controlling engine operation. The method including detecting brake release after a start-stop process; determining the clutch pressure; determining a required torque from the determined pressure based on a stored pressure-torque characteristic; determining the necessary engine speed requirement from the determined required torque based on a stored characteristic engine torque curve; inquiring whether the necessary speed requirement exceeds the available torque at the current engine speed; if not, then the engine speed is not increased; if so, inquiring whether the necessary speed requirement exceeds the accelerator requested speed; if not, increasing the engine speed with the engine control unit to the determined speed requirement; and if so, increasing the engine speed to the maximum set at the accelerator.

Abstract: A method of operating a drive-train (1) of a motor vehicle, in particular an agricultural or municipal utility vehicle, having a drive engine (2), a motor vehicle transmission (4) and at least one drive axle (6). A connection between the drive engine (2) and the at least one drive axle (6) of the motor vehicle is separate automatically by way of a function, and a service brake (11) of the motor vehicle has to be actuated for activation of the function. To ensure an appropriate starting gear selection in various operating situations, during the course of the function triggered by a braking process, a brake pressure (pBrems), applied during the process, is determined and a starting gear is automatically determined as a function of the brake pressure (pBrems).

Abstract: A method of operating an automated transmission control for a powershift transmission having a plurality of powershift gears and a synchronized transmission having a plurality of synchronized gears in the drive-train of a vehicle. The drive-train includes a drive motor, the powershift transmission and the synchronized transmission, with an electronic control unit by which an upshift of the gears of the synchronized transmission and the upshift of the gears of the powershift transmission can be carried out, and to which a motor load signal representing the motor load of the drive motor and a rotational speed signal representing the rotational speed at the output of the drive motor can be sent.