Abstract: A method is for operating an axial piston machine whose displacement volume is continuously adjustable using a double-acting control cylinder having two oppositely acting control chambers. The method includes providing a corresponding axial piston machine. An electrically adjustable pressure control valve is connected to one control chamber. Another control chamber is connected to an electrically adjustable 3/2-way switching valve. The method includes providing a target control pressure difference. A zero case is defined as a case in which the target control pressure difference is essentially zero. A positive case is defined as a case in which the target control pressure difference is positive. A negative case is defined as a case in which the target control pressure difference is negative. The method further includes calculating a first and a second control pressure. A case differentiation includes determining whether the zero case, the positive case, or the negative case is present.

Abstract: A pump assembly has a displacement volume that is continuously adjustable by a double-acting control cylinder having first and second control chambers, to which first and second receiving bores, respectively, are assigned. A pressure control valve in the form of a built-in valve is installed in one of the receiving bores and a 3/2-way switching valve in the form of a built-in valve is installed in the other of the receiving bores. The pressure control valve and the 3/2-way switching valve are each electrically adjustable and are connected to a control device. A target conveying pressure difference can be specified to the control device, and the control device is configured such that, by controlling the pressure control valve and the 3/2-way switching valve, the control device adjusts the displacement volume so that the difference between the first and second actual pressures approaches the target conveying pressure difference.

Abstract: A wheel hub drive with a planetary transmission includes a wheel hub rotatably mounted on a fixed component and at least one fluid-carrying passage. The fixed component is configured to receive a tire with a gaseous filling. The at least one fluid-carrying passage extends indirectly as far as the tire through the fixed component in order to regulate the gas pressure in the tire. An annular rotary union defines at least a portion of the at least one fluid-carrying passage and is configured to connect the fixed component fluidically to the tire. The annular rotary union is arranged axially between the fixed component and the rotatably mounted wheel hub.

Abstract: A field sprayer, with a longitudinal axis oriented in a direction of travel, includes a rod assembly extending substantially transversely in relation to the longitudinal axis, and an actuator. An acceleration sensor attached to the rod assembly is configured to determine undesired tilt movement of the rod assembly, and the actuator enables the rod assembly to swivel about a swivel axis in order to compensate for the undesired tilt movement. The field sprayer further includes a control unit configured to operate the actuator so as to produce a counter tilt in order to compensate for disturbance variables affecting a tilt of the rod assembly which act on the rod assembly other than via a frame of the field sprayer. The control unit is further configured to operate the actuator during, and preferably at the start of an undesired tilt movement.

Abstract: A wheel hub drive with a planetary transmission includes a wheel hub rotatably mounted on a fixed component and at least one fluid-carrying passage. The fixed component is configured to receive a tire with a gaseous filling. The at least one fluid-carrying passage extends indirectly as far as the tire through the fixed component in order to regulate the gas pressure in the tire. An annular rotary union defines at least a portion of the at least one fluid-carrying passage and is configured to connect the fixed component fluidically to the tire. The annular rotary union is arranged axially between the fixed component and the rotatably mounted wheel hub.

Abstract: A dialysate fluid circulation apparatus includes a dialyzer, a first housing and a second housing. The first housing contains material capable of releasing sodium into dialysate fluid flowing through the first housing. The second housing contains material capable of binding sodium ions from dialysate fluid flowing through the second housing. Hydraulic conduit sections are configured to extend between the dialyzer, the first housing, and the second housing to connect the dialyzer with the housings in a primary flow path for dialysate fluid to flow from the dialyzer to the first housing, from the first housing to the second housing, and from the second housing back to the dialyzer.