Abstract: A method for controlling a desired speed of a vehicle having a retarder operating in an overrun condition is proposed, such that the desired speed of the vehicle is controlled by a continuously adjustable retarder braking system and/or an engine braking control system.

Abstract: A method for activating and deactivating the four-wheel drive of a service or a working vehicle not having interaxle differential locks. According to the method, the activation and deactivation of the four-wheel drive is derived from at least one of the following parameters, namely, the driving and load conditions of the vehicle (1), the vehicle speed and the output torque of the gearbox.

Abstract: A method for automatically actuating longitudinal blocks in four-wheel vehicles, particularly in working machines and service vehicles. The longitudinal blocks are always open when driving situations occur in which the blocking effect is absolutely unnecessary. The longitudinal blocks are closed in all other situations.

Abstract: A method for controlling the desired speed in overrun condition for a vehicle comprising a retarder is proposed, such that the desired speed is controlled by a continuously adjustable retarder braking and/or engine braking control system.

Abstract: The invention relates to a method for activating and deactivating the four-wheel drive of service and working vehicles without interaxle differential locks. According to said method, said activation and deactivation of the four-wheel drive is derived from the driving and load conditions of the vehicle (1), the vehicle speed and/or gearbox output torque being used as parameters.

Abstract: A method for the activation of differential locks for vehicles, especially for such vehicles as may be used in construction work and field operations. The differential locks are always open, if the driving situation is such that a blocking operation is assuredly not required and, conversely in all other situations, the differential locks are closed.

Abstract: A method for automatically actuating longitudinal blocks in four-wheel vehicles, particularly in working machines and service vehicles. The longitudinal blocks are always open when driving situations occur in which the blocking effect is absolutely unnecessary. The longitudinal blocks are closed in all other situations.

Abstract: In a drive train for a working machine, in particular, a wheel loader, the driving speed is preselected via a driving pedal (11) and the working hydraulic system is actuated via a selector lever (8), whose signals are fed to an electronic control unit (10) which regulates a drive engine (1) and a clutch (2) arranged between the drive engine (1) and a pump impeller (3) of a hydrodynamic torque converter in such a manner that an auxiliary drive (6) for a pump (7) of the working hydraulic system is operated at a sufficient speed, while the preselected driving speed is not exceeded.

Abstract: In a drive train for a working machine, in particular, a wheel loader, the driving speed is preselected via a driving pedal (11) and the working hydraulic system is actuated via a selector lever (8), whose signals are fed to an electronic control unit (10) which regulates a drive engine (1) and a clutch (2) arranged between the drive engine (1) and a pump impeller (3) of a hydrodynamic torque converter in such a manner that an auxiliary drive (6) for a pump (7) of the working hydraulic system is operated at a sufficient speed, while the preselected driving speed is not exceeded.