Abstract: A hydraulic power steering system which includes a tank and a power steering pump which takes in a pressure medium from an intake area which is decoupled from the prevailing atmospheric pressure on the side of the tank wall and delivers it under pressure to the power steering system. A valve device builds up a pre-pressure in the intake area and prevents a negative pressure and a positive pressure from building up on the interior of the oil tank.

Abstract: A heating/cooling device (1) is proposed for vehicles, in particular motor vehicles, with a compressor (3), a refrigerant circuit (5), a gas cooler (7), an evaporator (9), and with an expansion valve (37) arranged between the gas cooler (7) and evaporator (9) in the refrigerant circuit (5). The heating/cooling device (1) is distinguished in that the gas cooler (7) or the evaporator (9) is coupled with a liquid coolant circuit (13, 23) which cooperates with an interior heat exchanger (19) or an external air heat exchanger (27), or that the gas cooler (7) and the evaporator (9) are each coupled with an its own liquid coolant circuit (13, 23), wherein one of the liquid coolant circuits (13, 23) cooperates with the interior heat exchanger (19) and the other liquid coolant circuit (23, 13) cooperates with the external air heat exchanger (27).

Abstract: The invention relates to a compressor, particularly for air conditioners in motor vehicles, comprising a safety device for limiting high pressure, whereby the safety device is hermetically sealed until first responding, after which it slowly reduces the system pressure.

Abstract: An intake-gas throttle device in the intake pressure region of an air-conditioning compressor, in particular for air-conditioning systems of motor vehicles, the device controlling the delivery rate of the air-conditioning compressor.

Abstract: A hydraulic power steering system which includes a tank and a power steering pump which takes in a pressure medium from an intake area which is decoupled from the prevailing atmospheric pressure on the side of the tank wall and delivers it under pressure to the power steering system. A valve device builds up a pre-pressure in the intake area and prevents a negative pressure and a positive pressure from building up on the interior of the oil tank.

Abstract: The invention relates to an axial piston machine, in particular, an air-conditioning compressor for motor vehicles, with at least one piston, an essentially cylindrical piston shaft and an enclosure, which encloses a tilt ring or a tilt disc and a piston slipper sliding on said tilt ring or said tilt disc, whereby the enclosure has spherical recesses for housing the piston slipper.

Abstract: An air conditioning compressor for air conditioning systems in motor vehicles, wherein the air conditioning compressor at the high pressure output comprises a check valve and a pressure control device, for example a pressure control valve or a bursting disk.

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: An air-conditioning compressor for air conditioning systems, especially for motor vehicles, or an air conditioning system comprising an air-conditioning compressor. The air-conditioning compressor is connected to a high-pressure zone and a suction pressure zone. Driving chamber pressure is redirected from the driving chamber of the air-conditioning compressor, i.e. from the high-pressure zone of the driving chamber to the suction pressure zone, if necessary while a filter, particularly a dirt particle filter, is optionally located in the suction pressure zone.

Abstract: The invention relates to an axial piston machine, in particular, an air-conditioning compressor for motor vehicles, with at least one piston, an essentially cylindrical piston shaft and an enclosure, which encloses a tilt ring or a tilt disc and a piston slipper sliding on said tilt ring or said tilt disc, whereby the enclosure has spherical recesses for housing the piston slipper.

Abstract: The invention relates to a compressor, particularly for air conditioners in motor vehicles, comprising a safety device for limiting high pressure, whereby the safety device is hermetically sealed until first responding, after which it slowly reduces the system pressure.

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 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 rotary vane pump for delivering a fluid, having a rotary delivery device accommodated in a casing (2), a casing cover (3) arranged on one side of the casing and a bearing flange (4) on the opposite side. A suction zone (12) is formed on each of the sides, and an injector device (114) injects a pressurized fluid into the fluid as it is delivered toward each of the suction zones to thereby assure a uniform admission of the fluid into the cells of the rotary delivery device of the pump. Also a leakage path (13) for the fluid extends between the delivery zone (11) and suction zone (12). The leakage path (13) extends on the inner side (14) of the seal at least in sections parallel to the seal (5,6).

Abstract: A rotary vane pump for delivering a fluid, having a delivery device (1) accommodated in a casing (2), with the casing (2) being closed on the one side by a casing cover (3), and on the other side by a bearing flange (4). A drive shaft (11) extends through the bearing flange (4), the delivery device (1), and optionally the casing (2), and is supported in a passageway formed in the bearing flange (4) and optionally in the casing cover (3). Also, between the delivery device (1) and the inside wall of the bearing flange (4), a side plate (16) is arranged, which supports itself on the inside wall, and centers the delivery device (1) in the casing (2). The side plate (16) is centered on the side facing the bearing flange (4) by a centering collar which extends into the passageway for the drive shaft (11).

Abstract: A rotary vane pump for delivering a fluid, having a delivery device accommodated in a casing (2), a casing cover (3) arranged on one end face, and optionally with a bearing flange (4) adjoining the casing (2) on the side opposite to the casing cover (3). A seal (5,6) is arranged between the casing (2) and the casing cover (3) and optionally between the casing (2) and the bearing flange (4), and the seal (5,6) is inserted into a groove (8,9) formed in the casing cover (3), and optionally in the bearing flange (4), and/or in the respective end face (7) of casing (2). Also a leakage path (13) for the fluid extends between a delivery side (11) and suction side (12). The leakage path (13) extends on the inner side (14) of the seal at least in sections parallel to the seal (5,6).

Abstract: A valve assembly for a hydraulic discharge device and including a piston displaceable in a bore of a housing of the discharge device against a biasing force and having an outer surface, which sealingly engages an inner wall of the housing bore and blocks a channel opening into the bore so that the piston functions as a slide valve for this channel, the valve assembly further including a valve seat which, together with the piston, forms a seated valve.

Abstract: A hydraulic machine is proposed, with a drive shaft rotating around a center axis, a drive wheel at a first end of the drive shaft, via which forces, which are characterized by a force component running largely vertical to the center axis, are led to the drive shaft, a second, opposite end of the drive shaft with a pump unit, which is characterized by a first rotating pump element connected to the drive shaft and a fixed pump element which works in conjunction with the first pump element, and with a bearing unit for the drive shaft, the hydraulic machine is characterized by the fact that the bearing unit (33) is offset to the line drawn by the middle axis (13) when the drive shaft (27) is not under load, where the bearing unit (33) is positioned in the direction of the force components relative to the center axis (13).

Abstract: A vane cell pump comprises a lifting ring forming at least one suction and one pressure chamber, a rotor movably arranged in the lifting ring and having radially movable vanes, and at least one pressure plate forming a lateral surface of the suction and pressure chamber, characterized in that the pressure plate (23, 25) is made of a near or hypo-eutectic aluminium alloy which contains silicon and which undergoes heat treatment.