Abstract: The present invention relates to a coupling device (1) for mechanical coupling and media supply between a carrier vehicle (41) and a superstructure (42), having a coupling mechanism (10) for establishing a mechanical coupling between the carrier vehicle (41) and the superstructure (42) and a media mechanism (20) for establishing a media supply between the carrier vehicle (41) and the superstructure (42), which are operatively connected with each another via an operating mechanism (30). The coupling mechanism (10) is mounted so as to be moveable between at least one first coupling position at least partially forming the mechanical coupling and a release position releasing the mechanical coupling. The media mechanism (20) is also mounted so as to be moveable between a supply position forming the media supply and a shut-off position shutting off the media supply.

Abstract: The invention relates to a hydraulic circuit having a first hydraulically actuable clutch that is closed in a rest state and a second hydraulically actuable clutch that is closed in the rest state, wherein the hydraulic circuit is configured in such a way that a hydraulic medium present in a main pressure line can be loaded with a working pressure by a pressure generating device and/or a pressure accumulator, and the hydraulic medium can be discharged for pressure dissipation via a main return line into the return reservoir. In some embodiments, the hydraulic circuit has a first distributor pressure line and a separate, first collector return line for the hydraulic supply of a first part circuit and at least one separate, second distributor pressure line and at least one separate, second collector return line for the hydraulic supply of a second part circuit, and the first clutch is assigned to the first part circuit and the second clutch is assigned to the second part circuit.

Abstract: The invention relates to a method for controlling the oil level (h3) in a differential gearbox for a vehicle having an oil sump (3) and an oil reservoir (4) that is pneumatically separated from the oil sump (3). The oil reservoir (4) is connected to the oil sump (3) by way of at least one oil channel (34), and the oil sump (3) is connected to a pneumatic pressure source (8) by way of at least one control valve (7) and an air line (5), wherein in at least one position (B) of the of a the control valve (7), the pressure source (8) is pneumatically connected to the oil sump (3). In order to improve the efficiency, at least one first characteristic operating parameter of the vehicle, according to the invention, is detected, and the control valve (7) is operated in dependence of at least said first characteristic operating parameter, wherein the vehicle speed (v) is selected as first characteristic operating parameter.

Abstract: The invention relates to a method for operating a vehicle/trailer unit, an appropriately designed vehicle/trailer unit, as well as a towing vehicle and an implement for such a vehicle/trailer unit, with the vehicle/trailer unit having a towing vehicle and an implement. The towing vehicle has a combustion engine and a first machine that can be operated as a prime mover, as well as a first axle that can be driven by means of the combustion engine, with it being possible for the combustion engine to be driven by means of the first machine. The implement has a second machine that can be operated as a work machine and a second axle that is mechanically coupled with the second machine.

Abstract: The invention relates to a method for controlling a wheel speed of a wheel of a drivable axle of a two-track vehicle with two drivable axles as well as to a corresponding vehicle, with the vehicle having a first drive motor for driving the first axle, a second drive motor for driving the second axle, a device for detecting driving state variables, and a control device. The method comprises the steps: Detecting an actual speed of the first axle, determining a target speed for the second axle as a function of the actual speed of the first axle, and controlling the second drive motor such that the determined target speed is achieved on the second axle. In order to determine the target speed, a synchronous target speed at which the same wheel circumferential speed is achieved on at least one wheel of the second axle as on the wheels of the first axle is determined as a function of the actual speed of the first axle.

Abstract: The invention relates to a method for controlling the oil level (h3) in a differential gearbox for a vehicle having an oil sump (3) and an oil reservoir (4) that is pneumatically separated from the the oil sump (3). The oil reservoir (4) is connected to the oil sump (3) by way of at least one oil channel (34), and the oil sump (3) is connected to a pneumatic pressure source (8) by way of at least one control valve (7) and an air line (5), wherein in at least one position (B) of the of a the control valve (7), the pressure source (8) is pneumatically connected to the oil sump (3). In order to improve the efficiency, at least one first characteristic operating parameter of the vehicle, according to the invention, is detected, and the control valve (7) is operated in dependence of at least said first characteristic operating parameter, wherein the vehicle speed (v) is selected as first characteristic operating parameter.

Abstract: The invention relates to a hydraulic circuit (1) of a torque transmission device, wherein at least two, in particular closed in a non-actuated state (normally closed), clutches (2, 3) of the torque transmission device can be element (12, 13) of the hydraulic circuit, wherein in a clutch opening state, every clutch valve element (12, 13) is connected to a high-pressure line (30) that is applied with the pressure of a high-pressure hydraulic accumulator (31) and/or generator (32), by means of a pressurisation line (22, 23) for the deflection of the clutch (2, 3), and in a closing state, same is connected to a low-pressure tank (40) by means of a tank line (42, 43, 44, 45, 46, 47, 48, 49) for releasing a deflection pressure, and wherein the tank lines (42, 43, 44, 45, 46, 47, 48, 49) of the clutch valve elements (12, 33) are guided to a safety valve (50), in particular by means of a common collection tank line (41), which safety valve can be switched in such a way that the tank lines (42, 43, 44, 45, 46, 47, 48,