Abstract: A pump, such as a rotary vane pump, roller cell pump, or gear pump for delivering diesel fuel, with a pump housing and a pumping unit that is arranged in the pump housing and driven for rotation via the drive shaft of a motor. The pump housing has an intake and an outlet, and the pump further has a hand pump unit that is integrally joined to the pump housing and delivers the fuel into the intake of the pump housing and thus into the flow path of the pumping unit.

Abstract: The invention relates to a pump with a pump chamber with a rotary-driven pump element mounted, at least one suction and at least one pressure connection opening into the pump chamber and with circulating pumping cells whose volume can be changed, which are connected with the suction or pressure connection depending on the rotary position of the pump element. A hydraulic intermediate capacity is provided that can be stressed with the pumping medium pressure present at the pressure connection by way of its first connection and that, by way of its second connection, can be stressed with the pumping medium pressure present at the pressure connection depending on the rotary position of the pump element or it can be connected with a pumping cell that has no direct connection to the pressure connection.

Abstract: A compressor, in particular for air conditioning systems in motor vehicles, having a housing, a housing sealing cover, a drive shaft with bearings and a drive device for pistons that are displaced back and forth. The drive device transfers the rotational displacement of the drive shaft into the back-and-forth displacement of the pistons. The compressor also includes a cylinder block, in which the pistons that are displaced back and forth take in and compress coolant, a valve device, in addition to a valve plate with intake and discharge valves comprising intake and discharge chambers for an intake pressure zone and a discharge pressure zone. A cylinder head may be a separate element from the housing, in pot-shaped form, or the housing sealing cover. The intake and discharge chambers, the valve device, and the cylinder block may be situated in the closed side of the pot-shaped housing.

Abstract: The pressure relief valve has a spring pressure-loaded diaphragm closing body (13), which in the closed position sealingly engages on a centrally positioned valve seating surface (10) surrounding a first valve opening (8). Its spring pressure loading takes place by means of a counterpressure body (13) positioned centrally over it. The valve seating surface (10) is surrounded by a channel-like valve chamber (11) in the valve housing body (2) and on which is provided on the overpressure side at least one second valve opening (9). To be able to dissipate high overpressures, the counterpressure body (30) is surrounded by a diaphragm support ring (17) held on the valve housing (6) and which has a circumferential recess (19), whose depth measured perpendicular to the diaphragm closing body (13) determines the maximum deflection of said body (13), so that when the valve is completely opened the diaphragm closing body (13) is supported in an area between the valve seating surface (10) and its outer edge.

Abstract: The invention relates to a radial piston pump, comprising an inlet chamber with an inlet connection, an eccentric which may be driven in a rotating manner, arranged within the inlet chamber, for driving at least one piston of the radial piston pump, a cylinder bore for guiding the piston and an inlet controller, which opens and closes a connection between the inlet chamber and the cylinder bore, depending on the piston position. The radial piston pump is characterized by at least one balancing element (24, 25) for the eccentric (17), which rotates synchronously with the eccentric (17) in the inlet chamber (20), the balancing element (24, 25) being so arranged in the inlet chamber (20) and/or so formed in its contour that a hydraulic resistance is formed between the inlet connection (8′) and inlet controller (31), or the flow of medium reaching the inlet controller (31) is unaffected.

Abstract: A power-steering pump for a motor vehicle is used to pump fluid to an additional fluid-driven device such as a hydraulic motor of a ventilation fan. The pump has a flow-regulating valve and an injector device, where a jet of excess fluid streaming off the flow-regulating valve generates a suction effect that pulls return fluid from a suction pipe or a reservoir tank into the intake area of the pump. A fluid stream returning from the additional fluid-driven device enters the intake area through one or more fluid return channels that are separate from the injector channel.

Abstract: A shaft-hub connection for transferring a torque between a shaft (1) and a hub (3) with the aid of at least one drive element (2). To enable a torque transfer which is practically resistant to wear, even under the effect of transversal forces, the contact surface between the shaft and the hub and/or between the shaft and the drive element and/or between the hub and the drive element is minimized in the axial direction thereof.

Abstract: A compressor, in particular an axial piston compressor having an axial piston drive mechanism for the intake and compression of a coolant, has a drive shaft for the drive mechanism with radial bearings of the shaft located at the front and at the rear of the compressor housing. A drive side having a pulley is defined as the front of the compressor, and the compressor includes at least one axial bearing for the shaft, the axial bearing being located in the cylinder head or pressure cover at the rear.

Abstract: A reciprocating piston mechanism for an air-conditioning compressor in a motor vehicle has a housing, a rotary driven shaft, a shaft seal assembly with a gliding ring seal, at least one radial shaft bearing, and at least one axial shaft bearing.

Abstract: An air-conditioning system with a refrigerant medium circulating in a refrigerant loop has a variable-stroke compressor with a high-pressure outlet chamber, a drive chamber and an intake suction chamber. A first valve regulates a first flow of refrigerant medium from the high-pressure outlet chamber to the drive chamber, and a second valve regulates a second flow of refrigerant medium from the drive chamber to the intake suction chamber. The first and second valves operate independently of each other under the control of a control unit, and the variable stroke of the compressor is controlled by the first and/or second flow of refrigerant medium.

Abstract: In an air-conditioning compressor with a revolving wobble plate driven by a driving shaft, the variable piston stroke height is regulated by directing pressure medium to flow from the high-pressure outlet compartment to the piston-drive compartment and/or from the piston-drive compartment to the intake suction compartment of the compressor. The driving shaft has a tubular end portion extending into a recess of the cylinder head. The medium flow from the high-pressure area to the piston-drive compartment is routed along the outside of the end portion, while the flow from the piston-drive compartment to the intake area is routed through the hollow channel inside the end portion. A flow-resisting element is arranged between the outside of the end portion and the wall of the recess in the cylinder head, so that the flow resistance towards the cylinder head is significantly greater than in the direction towards the driving compartment.

Abstract: In a wobble plate piston-drive mechanism, the inclination of the ring-shaped wobble plate is adjustable through an articulated connection of the wobble plate to the shaft by means of an axially movable guiding device and a driver arm that reaches into an engagement cavity of the wobble plate at a radial distance from the shaft to transmit the driving force from the shaft to the wobble plate. The driver arm head and/or the engagement cavity are shaped so that the force-transmitting contact between the driver arm head and the annular wobble plate is moved away from the area where the engagement cavity has its minimum wall thickness. This prevents or reduces deformation of the gliding surface of the wobble plate and thus makes the mechanism run more smoothly.

Abstract: In a motor vehicle with a combustion engine, an electronic engine-management device, and an air-conditioning system with an air-conditioning control device, the air-conditioning compressor has reciprocating pistons whose displacement stroke is adjustable through one or more control valves. The electronic engine-management device has direct access to and priority control over the adjustment of the piston stroke, so that the electronic engine management device takes precedence over the air-conditioning control device in controlling the adjustment of the piston stroke.

Abstract: A safety device limits the pressure in an axial-piston compressor with variable piston displacement. The compressor has as wobble plate or swash plate whose tilt angle can be variably controlled by the pressure differential between the high pressure in the discharge pressure zone and the pressure in the piston-drive chamber. The safety device consists of a valve arranged in a connector channel between the discharge pressure zone and the pressure zone of the piston-drive chamber. When the discharge pressure exceeds a given pressure limit, the safety device responds by allowing an increased flow of pressure medium from the discharge pressure zone to the piston-drive chamber. The influx of pressure medium into the piston-drive chamber causes a reduction of the tilt angle of the swash plate or wobble plate.

Abstract: A rotary vane pump for delivering a fluid and which has a housing which accommodates a rotatable delivery device (1) and which includes a feed channel (13) for receiving the fluid from a tank or the like. The feed channel communicates with a jet chamber (15) which in turn communicates via one or more suction channels (20) to at least two suction chambers which communicate with the intake region of the pump. An injector device (14) injects a pressurized fluid into the jet chamber to entrain and advance the fluid entering from the feed channel (13), and means are provided for influencing the flow of the fluid so as to achieve essentially the same volume flow into the two suction chambers.

Abstract: A power-steering pump for a motor vehicle is used to pump fluid to an additional fluid-driven device such as a hydraulic motor of a ventilation fan. The pump has a flow-regulating valve and an injector device, where a jet of excess fluid streaming off the flow-regulating valve generates a suction effect that pulls return fluid from a suction pipe or a reservoir tank into the intake area of the pump. A fluid stream returning from the additional fluid-driven device enters the intake area through one or more fluid return channels that are separate from the injector channel.

Abstract: A compressor for the air conditioning system of an automobile, having a housing and a compressor unit arranged in the housing for taking in and compressing a refrigerant. The refrigerant flows from an intake area through the compressor unit into a discharge area likewise formed in the housing cover, and the housing cover sealingly connects to the housing via connecting members. For reducing a load on the connecting members, the connecting area, through which the connecting members extend, is at least substantially separated from the pressure generated within the compressor.

Abstract: A compressor, in particular for a vehicle air conditioning system, with a housing, which contains a device for conveying a compressed medium driven by a drive shaft, designed as an axial piston machine and having at least one piston reciprocating in a cylinder block and a take-up plate connected to the piston working in combination with a swash plate rotating around a rotational axis, whereby the swash plate is connected to the drive shaft by a carrier and whereby the take-up plate encompasses a support device working in combination with a non-rotating thrust bearing.

Abstract: The invention relates to a valve arrangement with a pressure limiting valve and a flow regulator valve, which comprises a flow regulator piston, having at least one first hydraulic resistor, distinguished in that the flow regulator valve's (5) flow regulator piston (15) has a split pressure return surface and in that the first part (ring surface (45)) of the pressure return surface is capable of working at a pressure p1 and a second part (annulus surface (31)) of the pressure return surface is capable of working at a pressure p2.

Abstract: A compressor for an air conditioning system in an automobile, having a housing (1) and a compressor unit (2) accommodated in the housing (1) for taking in and compressing a refrigerant. The refrigerant flows from an intake area (4) preferably in a front-end housing cover (3) through the compressor unit (2) into a discharge area (5), preferably likewise designed and constructed in the housing cover (3). The compressor is designed and constructed for promoting efficiency such that components coming into contact with the refrigerant, particularly the walls forming a flow path (6) between the intake area (4) and the discharge area (5) are thermally insulated against the refrigerant at least partially and in areas of contact. For an effective protection of the drive belt when the drive shaft or the compressor unit locks, the compressor is further designed and constructed such that a coupling device automatically disengages, when a defined thermal and/or mechanical load limit is exceeded.