Deere + Company

Deere & Company

Michael Meid

Manuel Billich

Sebastian Traut

Thomas Busold

Christian Brueser

Guenther Wolf

Mathias Klittich

A hydraulic arrangement for a utility vehicle. The arrangement may include a hydraulic displacement pump which is connected via a pump output to a supply connection as a hydraulic interface for supplying hydraulic consumers of the utility vehicle. In addition, the device may include a hydraulic auxiliary pump and an auxiliary supply connection as a hydraulic interface for alternatively supplying at least some of the consumers. The device may include a displacement control unit which is dependent on an output pressure of the auxiliary pump for displacing the displacement pump in such a manner that a hydraulic working connection of a displacement cylinder of the displacement control unit is connected to an output of the auxiliary pump.

Hydraulic arrangement and utility vehicle

A hydraulic operating device for a cooling fan of a utility vehicle includes a hydraulic motor and a fan assembly, which can be driven by the hydraulic motor for generating a cooling air stream. A hydraulic supply is adjustable in terms of its delivery volume in accordance with pressure feedback for providing pressurized hydraulic liquid. A control valve for setting, in a manner dependent on a control signal that represents a cooling demand, a volume flow that passes through the hydraulic motor, with a sensor line that is branched off in a supply line between the control valve and the hydraulic motor leading to a pressure control inlet of the hydraulic supply.

Hydraulic operating device for a cooling fan of a utility vehicle

A vehicle cooling system includes a first fan assembly, a second fan assembly, and a control unit. The first fan assembly generates a main cooling flow acting upon a first cooler arrangement. The second fan assembly generates a secondary cooling flow adjacent to the main cooling flow and acting upon a second cooler arrangement. The secondary cooling flow is branched off from the main cooling flow via the second fan assembly. The main and secondary cooling flows pass through a filter element located upstream of the first and second fan assemblies and the first and second cooler arrangements. The control unit is configured to determine an actual value of a rotational speed variable of the second fan assembly, compare the actual value with a desired value specified for a cleaned state of the filter element, and generate a trigger signal to initiate a reversing operation of the first fan assembly.

Apparatus and method for operating a vehicle cooling system

A hydraulic arrangement for an agricultural or industrial utility vehicle includes a main hydraulic circuit, a main hydraulic pump, a charge pump, a lubricating hydraulic circuit, a gearbox lubricating hydraulic circuit, a shifting hydraulic circuit, and a gearbox pump. Hydraulic fluid can be fed to the main hydraulic circuit by the main hydraulic pump. Hydraulic fluid can be fed to the main hydraulic pump by the charge pump. At least a part of the hydraulic fluid delivered by the charge pump can be fed to the lubricating hydraulic circuit. Hydraulic fluid can be fed to the shifting hydraulic circuit by the gearbox pump. At least a portion of the hydraulic fluid delivered by the charge pump can be fed to the gearbox lubricating hydraulic circuit.

Hydraulic arrangement and agricultural or industrial utility vehicle

A hydraulic arrangement for a vehicle transmission includes a hydraulic pump for providing a system pressure for a first hydraulic system circuit and a lubrication pressure for a second hydraulic lubrication circuit. The arrangement also includes a control valve connected between a pump outlet of the pump and the two hydraulic circuits and has two different switching positions. The control valve, depending on the switching position, acts as a hydraulic connection between the pump and the system circuit or between the pump and the lubrication circuit.

Hydraulic arrangement for a vehicle transmission

A transmission arrangement for a vehicle includes an input gearbox including a first input shaft, a base gearbox connected to an output side of the input gearbox in a direction of a power flow, and a drive unit for rotatably driving a drive shaft at a rotational speed. The drive shaft is drive-connected to a second input shaft of the input gearbox. The transmission arrangement also includes a locking device being transferable into a locking position for arresting a rotation of the second input shaft.

Transmission arrangement

A hydraulic assembly for a vehicle transmission includes a hydraulic pump for providing a system pressure within a hydraulic circuit, a pressure accumulator for temporarily supplying pressure to the hydraulic circuit, and a valve assembly for charging the pressure accumulator after a predetermined pressure threshold value of the system pressure has been reached or exceeded. The valve assembly is hydraulically connected between the pump and the pressure accumulator.

Hydraulic assembly for a vehicle transmission

A hydraulic system of a vehicle includes a hydraulic pump with variable delivery capacity. The hydraulic pump is controllable as a function of a load and operatively connected to a drive of the vehicle. The system includes a first brake system for reducing a speed of the vehicle by at least one friction brake, and a permanent brake system being independent of the first brake system and configured to reduce the speed of the vehicle. The permanent brake system includes a first retarder circuit which cooperates with the hydraulic pump such that kinetic energy is removed from the vehicle by the permanent brake system via the hydraulic pump in order to decelerate the vehicle.

Hydraulic system, vehicle and composite vehicle

A hydraulic arrangement for a vehicle transmission includes a hydraulic system path leading to a hydraulic system circuit with a system pressure, a hydraulic lubrication path leading to a hydraulic lubrication circuit with a lubrication pressure, and a branching point connected to an output side of the system and lubrication paths. A variable displacement pump or a pump combination includes at least two fixed displacement pumps hydraulically connected to an input side of the branching point, and a variable displacement pump or at least one fixed displacement pump are hydraulically connected to the output side of the branching point and integrated into the hydraulic system path.

A hydraulic arrangement for a vehicle transmission includes a hydraulic pump for providing a system pressure for a first hydraulic system circuit and a lubrication pressure for a second hydraulic lubrication circuit. The arrangement also includes a control valve connected between a pump outlet of the pump and the two hydraulic circuits and has two different switching positions. The control valve, depending on its switching position, acts as a hydraulic connection between the pump and the system circuit or between the pump and the lubrication circuit.

A hydraulic control valve unit includes an input port hydraulically coupled to a pump, a working port hydraulically coupled to the working load, and a return port connected to a hydraulic tank. The unit includes a control slide movable into different working positions in an axial direction for controlling a hydraulic flow between the hydraulic ports and a slide housing surrounding the control slide. The control slide includes a control segment which is delimited in the axial direction by a control edge, and cooperates with an axial housing segment of the slide housing for controlling a flow cross section for hydraulic flow at the control segment. The control slide is rotationally driven about an axis of rotation in a rotational direction. The control edge of the control segment or the housing segment cooperating with the control segment is designed such that the flow cross section has a different size depending on a rotational position of the control slide.

Hydraulic control valve unit

A hydraulic system of a vehicle includes a first pump for supplying at least one first hydraulic circuit and at least one second pump for supplying at least one second hydraulic circuit with hydraulic medium. The second pump supplies the first hydraulic circuit with hydraulic medium in an emergency mode or when an output pressure of the first pump fails.

Hydraulic system and vehicle

A hydraulic arrangement includes a working pump for conveying a hydraulic medium in a direction of a hydraulic working load, a hydraulic tank comprising a tank outlet hydraulically connected to an inlet side of the working pump, and an auxiliary pump mounted in the hydraulic tank. A hydraulic flow of the hydraulic medium flows in the direction of the tank outlet in dependence on a control system.

Hydraulic arrangement

A hydraulic arrangement includes a pump for delivering a hydraulic medium in a direction of a hydraulic working load. The pump includes an adjusting input for adjusting a delivery flow thereof. The arrangement also includes an accumulator unit hydraulically coupled on an output side to the pump and a charging valve unit hydraulically coupled on the output side of the pump between the pump and the accumulator unit. The charging valve unit is configured to function as a disconnectable hydraulic connection between the pump and the accumulator unit.

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Waghaeusel, Germany

Michael Meid