Abstract: The invention relates to a vane cell pump, having a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in this rotor in radially displaceable manner, and an outer ring surrounding the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing or in a setting ring that can be moved in the pump housing along predetermined paths.

Abstract: An axial sliding bearing has a sliding ring disposed between two planar, ring-shaped sliding surfaces pressure-stressed against one another. The axial sliding bearing is overload-proof, in particular by about 30% to 80% with regard to the average pressure stress of about 30 to 40 bar per wedge segment that is usual in the case of wedge segment bearings, and at the same time, is not susceptible to axial vibrations, and, in this connection, can be easily produced in terms of production technology, and easily installed, and furthermore does not permit the “snap-over effects” that drastically impair the lubricant wedge effect, so that even under more difficult operating conditions, targeted optimal variation of the wedge angle, adapted to the operating conditions, in each instance, is always guaranteed, and great reliability of the axial sliding bearing, at a long useful lifetime, can be guaranteed, while simultaneously expanding the optimal dynamic supporting range.

Abstract: The invention relates to a switchable coolant pump for combustion engines which is driven by a pulley, wherein the impeller can be driven switchably by the pulley by way of a friction pairing. The switchable coolant pump according to the invention, comprising a connecting flange (9) for a pressure booster (10), the flange being disposed on the pump housing (1), and a working piston (14) disposed in a working cylinder (15), is characterized, among other things, in that on/in the pump housing (1) both the pulley (3) in a pulley bearing (2) and the pump shaft (5) in a pump bearing (4) are mounted separately, and a sleeve receptacle (17) is disposed in the pump housing (1), wherein an annular channel (19) is located in the annular bottom (18) of the receptacle, and an annular piston working sleeve (21) is inserted in the sleeve receptacle (17) in the pump housing (1), and an annular piston (24) that is provided with an annular piston packing (23) is disposed displaceably in the annular piston working sleeve (21).

Abstract: A controllable coolant pump driven by a belt pulley for internal combustion engines is equipped with a valve slide. A seal is disposed on the outer edge of the wall plate between the plate and the outer cylinder of the valve slide. At least one additional flow outlet opening is disposed on the pump housing, the outlet volume stream of which openings can be additionally controlled, aside from the controllable volume stream that exits from the flow exit opening. The flow outlet opening from which the controllable outlet volume stream exits is connected with an outflow opening disposed near the rear wall of the valve slide, in the pump chamber rear wall, via an outflow channel. The outflow opening is enclosed by a ring seal disposed in the pump chamber rear wall, which enters into operative engagement with the valve slide in its rear end position.

Abstract: A vane cell pump has a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in the outer circumference of this rotor, and an outer ring that surrounds the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing, or in a setting ring that can be moved in the pump housing, along predetermined paths. The vane cell pump has transverse grooves disposed in the cylinder mantle surface of the rotor, between the bearing grooves of the vane plates, running over the entire rotor width, disposed parallel to the bearing grooves of the vane plates, spaced apart from the bearing grooves by a bearing crosspiece. These transverse grooves have a non-symmetrical cross-section progression, which has a low point in each cell chamber, which point is always disposed behind the cell chamber center axis, seen in the direction of rotation.

Abstract: The invention relates to a gear ring pump, in particular for use in small pump assemblies which are preferably driven by an electric motor, which are produced as pump kits, and which are used in vehicle and engine construction. The aim of the invention is to develop a gear ring pump which can be used in pump assemblies with a small housing outer diameter, the pump control times of which can be easily modified with respect to the production process in accordance with the respective customer request, and which always ensures an optimal axial gap even when using very inexpensive assemblies, such as pump housings made of aluminum and impellers made of steel, even under the extreme use conditions of an oil pump in conjunction with an internal combustion engine.

Abstract: A regulatable coolant pump and a method for regulation of this regulatable coolant pump for internal combustion engines, which is driven by way of a pulley actives a valve slide using an electromagnetically activated piston pump equipped with a return spring in the form of a pressure spring. The pump implements a “pump feed” using many small “partial lifts.” A “leakage volume stream” that flows opposite to the “pumped volume stream” is superimposed on the “pumped volume stream” via the arrangement of circular apertures both in the inlet valve membrane of the working piston and in the outlet valve membrane so that the valve slide can be moved in defined manner and in a very robust and reliable manner, with low drive power via the defined superimposition of these two volume streams.

Abstract: The invention relates to a device and method for the defined longitudinal shifting of an adjusting device which rotates along in a drive shaft, along the center axis of the drive shaft. The solution according to the invention is characterized in that a working chamber (12) is arranged at the opposite end of the drive shaft (1), into which working chamber a passage hole (7) arranged in the drive shaft (1) opens, wherein a working piston (13) that operatively connects to the working chamber (12) is arranged in such a way that, in the event of a pressure build-up in the working chamber (12), the adjusting device (2) is variably moved against the spring force of a restoring spring (10) by means of a radial piston pump according to the invention that is arranged on the drive shaft (1).

Abstract: An apparatus for activation of a control valve is configurable as a slide, ball valve, rotary slide, poppet valve, or the like, and controls or regulates pressure-impacted media, for example, regulating the coolant volume stream of an internal combustion engine. A push piston linearly displaceable in a piston guide rigidly disposed on the flow housing, with an activation joint, is fastened onto the flow housing. A connecting rod is disposed in the activation joint. A push joint is disposed at the push piston end that lies opposite the activation joint, in which push joint the activation element of a control valve is displaceably and/or rotatably disposed. A reset spring is disposed adjacent to the push joint and acts on the push piston, in the direction of its longitudinal axis, so that the push piston always lies against the connecting rod without play, with the activation joint.

Abstract: An axial-flow coolant pump mechanically driven by a pulley, a gear wheel, a plug-in shaft, or the like, for internal combustion engines uses a semi-axial impeller, a Francis impeller or diagonal impeller with three-dimensionally, spatially curved blades as the rotor, and the stator disposed in the pump housing possesses an inner guide cone that narrows in the flow direction, and an outer conical guide cap disposed to be spaced apart from the cone, and the two, spaced apart symmetrically, are connected by way of three-dimensionally, spatially curved stator vanes, wherein the rotor is spaced apart from the stator by a ring gap, in such a manner that the rotor has a minimal distance, not only, on the face side, from the adjacent outer edge of the guide cone, but also, on the face side, from the adjacent outer edge of the guide cap.

Abstract: A lubricant valve for oil pumps of internal combustion engines has a double piston in a piston guide of a valve seat of the pump housing, the double piston consisting of a cold-start piston which is arranged in a control piston and is arranged in a cold-start piston guide which is arranged in the control piston, wherein, lying opposite the cold-start piston guide, a piston rod is arranged on the piston head of the control piston, on which piston rod, spaced apart from the piston head of the control piston, a working piston is arranged which the piston rod protrudes beyond in the form of a spacer rod, wherein, adjacent to the working piston, inflow holes are arranged in the piston head of the control piston and, adjacent to the piston head, outflow holes are arranged in the cylinder wall of the cold-start piston guide of the control piston.

Abstract: The invention relates to a lubricant valve for oil pumps of internal combustion engines, in order to supply the bearings and sliding surfaces of the engines with lubricant in an optimum manner in order to reduce the wear. The invention is based on the problem of developing a lubricant valve for oil pumps of internal combustion engines, which lubricant valve combines, in particular, the functions of a cold-start valve and those of a control valve within itself with a minimum amount of installation space and is constructed in such a way that it is insensitive with respect to the wear debris and/or foundry sand which is entrained by the lubricant, in the process makes high throughflow quantities possible, in addition is of inexpensive construction in terms of production and assembly technology and can be produced inexpensively, and, moreover, always operates robustly, reliably and insusceptible to disruptions, even under extreme use conditions.

Abstract: The invention relates to a vane cell pump, having a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in this rotor in radially displaceable manner, and an outer ring surrounding the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing or in a setting ring that can be moved in the pump housing along predetermined paths.

Abstract: A controllable coolant pump for internal combustion engines is driven by a belt pulley. The controllable coolant pump has a hydraulically actuated gate valve connected to a ring piston. An axial piston pump is disposed in the pump housing and is driven and “operated” by means of a swashplate having a suction groove and disposed on the back side of the flywheel. The “pumped volume flow” of the pump is controlled in a defined manner by means of a solenoid valve such that precise displacement of the hydraulically actuated gate valve is ensured.

Abstract: A blade wheel consisting of sheet metal for use in motor vehicle refrigerant pumps has blades that are cut out of a disk and pitched and base disk segments that lie adjacent to the blades and remain between the latter. The blade wheel is formed by at least two different blade wheel elements which are provided with cut out, pitched blades, are interconnected in a fixed manner and are arranged so that their respective base disk segments are offset in relation to one another, forming a gap therebetween, the elements thus forming a common bottom disk. A hub sleeve is provided in the center of one of these blade wheel elements (the hub disk), and the center of the other blade wheel element or elements (the bore disk or disks) is provided with a hub sleeve receiving bore, which can be pushed onto the casing of the hub sleeve.

Abstract: The invention relates to a switchable coolant pump for combustion engines which is driven by a pulley, wherein the impeller can be driven switchably by the pulley by way of a friction pairing. It is the aim of the invention to develop a switchable coolant pump for combustion engines of the above type, which is simple to manufacture in terms of the manufacturing engineering thereof, driven by a pulley, and which is suited particularly for smaller coolant pumps (which is to say, coolant pumps in which the distance between the pulley and the impeller is smaller than 15 mm and the pulley diameter of which is smaller than 50 mm).

Abstract: The invention relates to vane cell pumps having a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in the outer circumference of this rotor, and an outer ring that surrounds the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing, or in a setting ring that can be moved in the pump housing, along predetermined paths. The purpose is to develop a new type of vane cell pump having a new type of pump chamber geometry, which guarantees optimal, complete filling, in terms of flow technology, of the pump chambers, particularly at speeds of rotation in the range from 4500 rpm to beyond 6000 rpm, and furthermore is easy to manufacture, in terms of production technology.

Abstract: A controllable coolant pump for internal combustion engines driven by torque transmission elements has a pump housing, a driven shaft mounted in the pump housing, an impeller wheel arranged fixedly in terms of rotation on a free, flow-side end of the shaft, and a pressure-activated valve slide having an outer cylinder covering the outflow region of the impeller wheel in a variable manner. The valve slide is of annular configuration and is arranged on piston rods mounted displaceably in the pump housing. An annular piston mounted in an annular groove in the pump housing and movable in a defined manner in the annular groove via excess pressure or vacuum is arranged on the piston rods in a manner lying opposite the valve slide.

Abstract: A regulatable coolant pump and a method for regulation of this regulatable coolant pump for internal combustion engines, which is driven by way of a pulley actives a valve slide using an electromagnetically activated piston pump equipped with a return spring in the form of a pressure spring. The pump implements a “pump feed” using many small “partial lifts.” A “leakage volume stream” that flows opposite to the “pumped volume stream” is superimposed on the “pumped volume stream” via the arrangement of circular apertures both in the inlet valve membrane of the working piston and in the outlet valve membrane so that the valve slide can be moved in defined manner and in a very robust and reliable manner, with low drive power via the defined superimposition of these two volume streams.

Abstract: A coolant pump and method thereof for a coolant circuit of the internal combustion engine of a motor vehicle including at least a radiator circuit and a bypass circuit is disclosed. The coolant pump contains a coolant pump housing (14) which is provided with an intake pipe (22), a bypass pipe (24), and a pressure pipe (34). A coolant pump electric motor (26) is arranged in the coolant pump housing (14), the motor housing (28) of which is situated in the coolant flow, drives a pump impeller (32) via a pump shaft (30). A directional control valve (40) is integrated into the coolant pump housing (14). The intake pipe (22) is arranged in the area of the end of the pump motor facing away from the pump impeller (32). Furthermore the bypass pipe is arranged in an area downstream of the intake pipe (22).The pressure pipe (34) is arranged in an area downstream of the bypass pipe (24).