Abstract: A method of operation for an internal combustion engine (1) whose output power can be controlled by means of a controlling parameter (T), in which an engine characteristic curve (11, 12) which, at a value of the controlling parameter (T) which corresponds to a maximum output power, specifies the output power (P) as a function of the engine's speed of revolution (?), has an ascending part (12) at low speeds of revolution and a descending part (11) at high speeds of revolution, is characterized in that if, when the engine (1) is operating, the speed of revolution (?) exceeds a first upper limiting value (?max,0) at the value of the controlling parameter which corresponds to the maximum output power, a first value (T1(?)) of the controlling parameter (T) is set which corresponds to a reduced output power.

Abstract: A method of operation for an internal combustion engine (1) whose output power can be controlled by means of a controlling parameter (T), in which an engine characteristic curve (11, 12) which, at a value of the controlling parameter (T) which corresponds to a maximum output power, specifies the output power (P) as a function of the engine's speed of revolution (?), has an ascending part (12) at low speeds of revolution and a descending part (11) at high speeds of revolution, is characterised in that if, when the engine (1) is operating, the speed of revolution (?) exceeds a first upper limiting value (?max,0) at the value of the controlling parameter which corresponds to the maximum output power, a first value (T1(?)) of the controlling parameter (T) is set which corresponds to a reduced output power.

Abstract: A motor vehicle has at least two drive units which can be operated in a drive train, with devices assigned to the drive units which permit identical or different power output from the drive units, and the power output from the drive units is coordinated such that the drive units are operated in the range of low fuel consumption. In this manner it is ensured that the drive units integrated in one drive train are operated at nearly optimal operating points.

Abstract: An agricultural motor vehicle has at least two drive units which can be operated in a drive train, each of which is capable of outputting the same amount or different amounts of power, each of said drive units includes a unit for recording operating hours; the at least two drive units have a nearly balanced operating-hour ratio within a certain time period. In this manner it is ensured that either working unit does not experience more wear than the other within the time period; this ensures that service work is performed on the two drive units at nearly the same time, during the same service appointment.

Abstract: A device for cleaning a perforated radiator cage with at least one end face and peripheral side on an agricultural harvesting machine, wherein the device consists of an external brush which is associated with the radiator cage and which is in turn surrounded by a unitary air extractor proximate to the radiator cage.

Abstract: A device for cleaning a perforated radiator cage with at least one end face and peripheral side on an agricultural harvesting machine, wherein the device consists of an external brush which is associated with the radiator cage and which is in turn surrounded by a unitary air extractor proximate to the radiator cage.