Abstract: A method for calibrating a characteristic diagram for a drive-train of a working machine, which contains a brake pedal characteristic of a brake system and a clutch characteristic of a drive clutch, in which an opening point at which the drive clutch is disengaged when a brake pedal of the brake system is actuated as a function of a pedal path, and/or a closing point at which the drive clutch is engaged when the brake pedal is released as a function of the pedal path, is calibrated. When the brake pedal is actuated and/or released an actual rotational speed profile of the drive-train is determined, the actual rotational speed profile determined is compared with a stored corresponding target rotational speed profile, and the opening point and/or closing point of the drive clutch is adapted to minimize deviation of the actual rotational speed profile from the target rotational speed profile.

Abstract: A method is described for calibrating a characteristic diagram of a working machine. The characteristic diagram includes a brake pedal characteristic of a brake system and at least one clutch characteristic of a drive input clutch which, in the calibrated condition, have a nominal relationship to one another. The method having the steps of: determining a wheel-side drive output torque; determining an actual brake pedal characteristic with reference to the drive output torque; determining an actual relationship that differs from the nominal relationship by comparing the actual brake pedal characteristic with a nominal brake pedal characteristic; and calibrating the brake pedal characteristic or the clutch characteristic in such manner that the actual relationship corresponds to the nominal relationship. In addition a working machine with a control unit for carrying out the method is described.

Abstract: A method of starting or holding a mobile vehicle and, in particular, a working machine. The method determines whether the vehicle is rolling backward on an inclined surface and, as a function of that knowledge, the rotational speed of the drive engine is increased, or a downshift by one gear is carried out in the transmission.

Abstract: A rotational speed-regulated internal combustion engine in a working machine, for example a wheel loader, shortly before the engaging a bridging clutch of a hydrodynamic torque converter, is switched over in such manner that the internal combustion engine operates under torque regulation when the bridging clutch of the hydrodynamic torque converter is engaged.

Abstract: A method of transmitting power of an inching clutch of a working machine, the power transmitted by the inching clutch is determined and the transmitted power exceeds a predefined inching clutch power, first the rotational speed of the drive engine is reduced and then the torque, that can be transmitted by the inching clutch, is reduced.

Abstract: A rotational speed-regulated internal combustion engine in a working machine, for example a wheel loader, shortly before the engaging a bridging clutch of a hydrodynamic torque converter, is switched over in such manner that the internal combustion engine operates under torque regulation when the bridging clutch of the hydrodynamic torque converter is engaged.

Abstract: A method of starting or holding a mobile vehicle and, in particular, a working machine. The method determines whether the vehicle is rolling backward on an inclined surface and, as a function of that knowledge, the rotational speed of the drive engine is increased, or a downshift by one gear is carried out in the transmission.

Abstract: A method of transmitting power of an inching clutch of a working machine, the power transmitted by the inching clutch is determined and the transmitted power exceeds a predefined inching clutch power, first the rotational speed of the drive engine is reduced and then the torque, that can be transmitted by the inching clutch, is reduced.

Abstract: A method of actuating a retarder of a motor vehicle, for example a hydrodynamic retarder of a commercial vehicle, in which during overrun operation the driver uses an operating element to call for a braking action by the retarder. To implement the method simply, conveniently and inexpensively, the accelerator pedal of the motor vehicle is used as the operating element for demanding a braking action by the retarder. In such manner that when the torque of the drive engine of the motor vehicle becomes negative due to overrun operation, the braking action demand is signaled by at least partially releasing the accelerator pedal.

Abstract: A method of actuating a retarder of a motor vehicle, for example a hydrodynamic retarder of a commercial vehicle, in which during overrun operation the driver uses an operating element to call for a braking action by the retarder. To implement the method simply, conveniently and inexpensively, the accelerator pedal of the motor vehicle is used as the operating element for demanding a braking action by the retarder. In such manner that when the torque of the drive engine of the motor vehicle becomes negative due to overrun operation, the braking action demand is signaled by at least partially releasing the accelerator pedal.

Abstract: A method and a device for controlling functions of an occupational vehicle (1) comprising a driving motor (2), a clutch (3), a service brake (13, 14) that acts upon the wheels (11, 12) of the vehicle, a working device (21), and a hydraulic pump (15) which supplies the actuators (32) of the clutch (3), the service brake (13, 14), and the actuators (19, 20) of the working device (21) with pressure, via hydraulic pressure pipes. In order to reduce the fuel consumption, distribute in an optimal and user-relevant manner, the hydraulic pressure generated by the pump (15), and facilitate operation of such a vehicle, the clutch (3) is automatically opened and the service brake (13, 14) is automatically closed when the load acting upon the working device (21) of the vehicle exceeds a preset threshold or is actuated so as to exceed the threshold.

Abstract: A clutch (2) is arranged between the drive engine (1) and the hydrodynamic torque converter (4), which is actuated partially in the opening direction during the reversing process to influence the reversing time in a working machine, such as a wheel loader or a floor-level conveyor vehicle.