Abstract: A method for controlling traction of a wheeled vehicle or a vehicle combination having a tractor vehicle and at least one trailer vehicle. A sensor device on a coupling element of a trailer device transmits coupling forces in x, y, and z directions to the coupling element of the tractor vehicle, which are measured and emitted as force signals. From these force signals, an evaluation unit determines the coupling force acting in the respective vehicle direction and transmits them to a control unit. Traction of the tractor vehicle is adapted to suit the properties of the ground surface. Using sequences of the coupling forces, the dynamic fraction if filtered out and from these a characteristic value is determined and transmitted to the control unit. If the characteristic value exceeds a limit value, then at least one measure to improve the traction of the tractor vehicle is carried out.

Abstract: A brake system for a motor vehicle includes a control valve, a redundancy valve, a brake valve, a brake cylinder, a pressure fluid source, an electronic control unit, a parking lock, and a depressurized tank. The control valve and the redundancy valve are mechanically preloaded in a closed state, whereas the brake valve is mechanically preloaded in an open state. The electronic control unit is configured to control the brake valve so that it moves into a closed state so that pressure fluid flows out of the brake cylinder via the brake valve directly into the depressurized tank, and no pressure fluid is fed into the brake cylinder via the control valve or the redundancy valve and the brake valve, if the control valve or the redundancy valve remains in an open state due to a mechanical defect and otherwise should be in the closed state.

Abstract: A braking system for a towing vehicle is disclosed. The braking system includes a pressure medium source for supplying pressurized pressure medium, a parking brake module having a control valve and a redundancy valve, a trailer control valve system for a trailer brake of a trailer vehicle towed by the towing vehicle, and an electronic control unit. The electronic control unit is configured to control the trailer control valve system in such a way that pressure medium escapes via the trailer control valve system into a non-pressurized environment, whereby the pressure medium source is emptied, when the control valve or the redundancy valve persist in the open state due to a mechanical defect and otherwise should be in the closed state, and when an ignition of the towing vehicle and a compressor for filling the pressure medium source are switched off.

Abstract: A method is provided for detecting a malfunction of a valve (46) of a braking device (10) for a processing machine, where the braking device (10) has a brake that can be actuated via the valve (46) and a transmission portion (22). The method includes triggering (I.1) the valve (46) of the braking device (10) and determining a state variable in the transmission portion (22). The method further comprises a comparison (III.1) of the determined state variable to a reference variable and a detection (IV.1) of a malfunction of the valve (46) based on a result of the comparison.

Abstract: The invention relates to a pneumatic valve system (5) for a braking system of a towing vehicle. The pneumatic valve system (5) comprises a valve block (28) comprising a supply pressure inlet (29), a towing vehicle supply pressure outlet (30) and a towing vehicle control pressure outlet (32), as well as a control valve (6), a redundancy valve (7), and a brake valve (10). The pneumatic valve system (5) permits a redundant pressure supply of a brake cylinder of a parking brake of the towing vehicle by connecting the valves and the supply pressure outlet and outlets to one another in a very compact and stable manner.

Abstract: A method of brake control of a vehicle combination (2) composed of a tractor vehicle (4) with an electronically controlled braking system (5) and a trailer vehicle (6, 8) with a pneumatically controlled pneumatic braking system (7, 9), involves introducing the brake control pressure (pBC) of the trailer vehicle (6, 8) into a tractor brake control line (19) extending to a tractor vehicle-side “brake” coupling head (26) via an electronically controlled trailer control valve (13) of the tractor vehicle (4). At the beginning of a braking operation, a pressure pulse (34) exceeding a target brake control pressure (pBC_soll) is introduced into the tractor brake control line (19). The volume of a trailer brake control line (28, 29, 32) coupled to the “brake” coupling head (26) is ascertained, and the absolute value (?pPI) and/or the duration (?tPI) of the pressure pulse (34) introduced are/is established depending on the ascertained volume.

Abstract: A trailer control valve for controlling a hydraulic dual-line brake system of a trailer vehicle has an inlet for a hydraulic supply line of the towing vehicle, a tank outlet for an unpressurized return-flow line of the towing vehicle, a brake pressure outlet, and a supplemental pressure outlet. The brake pressure outlet can be connected in a stepped manner with an electronically controlled brake control valve to the supply pressure inlet or to the tank outlet. The supplemental pressure outlet can connect using a valve arrangement so that an outlet pressure of the supply pressure is reduced to a supplemental pressure at the supply pressure inlet or at the tank outlet. The valve arrangement has a pressure-limiting valve and a shut-off valve arranged in series. The shut-off valve can be a 3/2-way valve, which when not energized, the supplemental pressure outlet is connected to the tank outlet.

Abstract: A tire pressure control device of an off-road vehicle is configured for changing tire pressures of vehicle wheels of at least one vehicle axle. Each pneumatic tire has a pressure-controlled wheel valve which is pneumatically connected to a control pressure line and to a supply pressure line. The control pressure lines and the supply pressure lines are pneumatically connected to a compressed air supply device and controlled by an electronic control unit. The actuation of the wheel valves takes place axle by axle via control valves, and the compressed air supply of the vehicle wheels is carried out by side via supply valves.

Abstract: A valve arrangement (14.2) of a tractor vehicle (2) for controlling a pneumatic brake system of a trailer vehicle (4) includes a trailer control valve (16) with a reservoir pressure input (p11) for the introduction of reservoir compressed air and a reservoir pressure output (p21) for the controlled discharge of reservoir compressed air. The reservoir pressure output is pneumatically connected to a “reservoir” coupling head (6) of the tractor vehicle. A shut-off and ventilation valve (98) is arranged in a reservoir pressure line (48) upstream of the “reservoir” coupling head. Before connecting an associated coupling head of the trailer vehicle (4) to the “reservoir” coupling head of the tractor vehicle, the feed of reservoir compressed air to the “reservoir” coupling head can be shut off to ventilate the “reservoir” coupling head. After reconnecting the associated coupling head, the “reservoir” coupling head can be charged again.

Abstract: A method for checking an actual-pressure sensor of a motor vehicle brake system includes establishing the duration of a reaction interval, establishing a threshold value, operating the motor vehicle brake system in an electronic braking mode where the brake system delivers a braking pressure for operation of a trailer brake of a trailer connected to the motor vehicle. The reaction interval starts at the beginning of the braking process and pneumatic actual braking pressure values are measured by means of an actual-pressure sensor, where a starting braking pressure is measured by the actual-pressure sensor at the beginning of a braking process carried out in the electronic braking mode for the trailer. Pneumatic reaction braking pressures are measured within the reaction interval and compared to a threshold value. Brake system operation is discontinued in the electronic operating mode if none of the measured reaction braking pressures exceeds the threshold value.

Abstract: A method is disclosed for controlling a change in the direction of travel of a working vehicle between forward travel and rearward travel or vice versa. The working vehicle has an electronically controllable hydrostatic travel drive, a power-operated brake system with at least one electronically controllable brake circuit, and an electronic brake-control unit for controlling the travel drive and the brake circuit. While the vehicle is traveling in a first direction, a change in the direction of travel is triggered by a switchover of the hydrostatic travel drive by means of an assigned manual operating element. To reduce the mechanical loading, the deceleration of the working vehicle can be assisted by automatically actuating the brakes of the electronically controllable brake circuit, where these brakes are actuated by being triggered by the switchover of the operating element and are released by the time the vehicle comes to a standstill.

Abstract: A trailer control module (94) of a pressure-medium operated braking system of a tow vehicle has a valve assembly for controlling a pneumatic braking system of a trailer vehicle The valve assembly includes the following: an electronically controlled trailer control valve (6) which contains a pneumatically controlled relay valve (18) with an inverted control input (34); a pressure-medium controlled backup valve (8) which contains a pressure-medium controlled relay valve (54); and at least one electronically controlled parking brake valve (68, 70), via which the relay valve (18) of the trailer control valve (6) can be actuated pneumatically at its inverted control input (34). In addition, a coupling device (98) is present, by which the parking brakes of the tow vehicle can also be operated via the parking brake valve (68, 70).

Abstract: A valve arrangement (2a, 2b) of a hydraulically braked tractor vehicle for controlling the brake pressure of a pneumatically braked trailer includes an electronically controlled trailer control valve (6) with an inlet valve (14), an outlet valve (16), a pneumatical relay valve (18), a breakaway valve (20) and a brake control pressure sensor (24). The valve arrangement also has a hydraulically controlled backup valve (8) with a hydraulically activated relay valve (46), a redundancy valve (112, 112?) and a hydraulic control pressure sensor (50). Output-side brake control lines (40; 62) are connected via a shuttle valve (10) to a brake coupling head (82). The valves (14, 16, 18, 20) and the pressure sensors (24, 50) of the trailer control valve (6), the valves (46, 112, 112?) of the backup valve (8) and the shuttle valve (10) may be combined in one trailer control module (98) with a single housing (100).

Abstract: A device and a method for decelerating a vehicle having a front-loading device has a brake system and sensors for measuring the mass and the center of gravity of a load. An electronic evaluation and control unit evaluates the sensor data to determine a maximum brake deceleration in forward travel, in order to prevent the vehicle tilting about the front axle. At least one sensor of the brake system generates a sensor signal in an emergency braking situation for triggering an emergency braking operation, in which the delimitation or reduction of the effective brake pressure in the wheel brake cylinders of the front axle is canceled and, with the exception of an ABS control operation, the full brake pressure is introduced in a controlled manner by way of a primary brake valve into the wheel brake cylinders of the front axle.

Abstract: A valve arrangement (14.2) of a tractor vehicle (2) for controlling a pneumatic brake system of a trailer vehicle (4) includes a trailer control valve (16) with a reservoir pressure input (p11) for the introduction of reservoir compressed air and a reservoir pressure output (p21) for the controlled discharge of reservoir compressed air. The reservoir pressure output is pneumatically connected to a “reservoir” coupling head (6) of the tractor vehicle. A shut-off and ventilation valve (98) is arranged in a reservoir pressure line (48) upstream of the “reservoir” coupling head. Before connecting an associated coupling head of the trailer vehicle (4) to the “reservoir” coupling head of the tractor vehicle, the feed of reservoir compressed air to the “reservoir” coupling head can be shut off to ventilate the “reservoir” coupling head. After reconnecting the associated coupling head, the “reservoir” coupling head can be charged again.

Abstract: A trailer control module (94) of a pressure-medium operated braking system of a tow vehicle has a valve assembly for controlling a pneumatic braking system of a trailer vehicle The valve assembly includes the following: an electronically controlled trailer control valve (6) which contains a pneumatically controlled relay valve (18) with an inverted control input (34); a pressure-medium controlled backup valve (8) which contains a pressure-medium controlled relay valve (54); and at least one electronically controlled parking brake valve (68, 70), via which the relay valve (18) of the trailer control valve (6) can be actuated pneumatically at its inverted control input (34). In addition, a coupling device (98) is present, by which the parking brakes of the tow vehicle can also be operated via the parking brake valve (68, 70).

Abstract: A method of brake control of a vehicle combination (2) composed of a tractor vehicle (4) with an electronically controlled braking system (5) and a trailer vehicle (6, 8) with a pneumatically controlled pneumatic braking system (7, 9), involves introducing the brake control pressure (pBC) of the trailer vehicle (6, 8) into a tractor brake control line (19) extending to a tractor vehicle-side “brake” coupling head (26) via an electronically controlled trailer control valve (13) of the tractor vehicle (4). At the beginning of a braking operation, a pressure pulse (34) exceeding a target brake control pressure (pBC_soll) is introduced into the tractor brake control line (19). The volume of a trailer brake control line (28, 29, 32) coupled to the “brake” coupling head (26) is ascertained, and the absolute value (?pPI) and/or the duration (?tPI) of the pressure pulse (34) introduced are/is established depending on the ascertained volume.

Abstract: A method for brake control of a vehicle combination (1) having a tractor vehicle (2) and a trailer vehicle (3) with an electrically controllable trailer control valve (9) changes an assigned trailer control valve characteristic curve (p_normal) stored in an electronic controller (6) for normal operation of the vehicle combination (1) or replaces it with a trailer control valve characteristic curve for special operation (p_special) in the event that a special operation of the vehicle combination (1) is detected or predicted, which special operation, under consideration of relevant parameters, differs from the normal operation or is evaluated as being potentially impermissible.

Abstract: A tire pressure control device (1) of an off-road vehicle is configured for changing tire pressures of vehicle wheels (2a, 2b, 3a, 3b) of at least one vehicle axle (2, 3). Each pneumatic tire has a pressure-controlled wheel valve (4a, 4b, 5a, 5b) which is pneumatically connected to a control pressure line (S1, S2) and to a supply pressure line (V1, V2). The control pressure lines (S1, S2) and the supply pressure lines (V1, V2) are configured to be pneumatically connected to a compressed air supply device (6) and to be controlled by an electronic control unit (10) The actuation of the wheel valves (4a, 4b, 5a, 5b) takes place axle by axle via control valves (15, 16), and the compressed air supply of the vehicle wheels (2a, 2b, 3a, 3b) is carried out by side via supply valves (11, 12).

Abstract: The present disclosure relates to a measuring device (42, 43) for measuring forces and/or torques between a motorized vehicle (1) and a trailer or attachment which is towed or pushed thereby, wherein the measuring device (42, 43) has at least three sensor elements (22, 34) which are arranged on a carrier (20, 31), transversely with respect to a virtual longitudinal axis of the motorized vehicle (1) and spaced apart from one another, wherein the measuring device (42, 43) is arranged in a coupling region between the motorized vehicle (1) and the pulled or pushed trailer or attachment, and wherein, in order to transmit their measured values, the sensor elements (22, 34) are connected to an evaluation device (40), which is configured to convert these measured values into signals for force displays and/or torque displays according to magnitude and direction.