Abstract: A coolant pump for an internal combustion engine (ICE) in a vehicle with a central engine control, having a pump shaft that drives an impeller for pumping a coolant. An axial piston pump operated via a wobble plate on a rear face of the impeller, conducts part of the pumped coolant away to a hydraulic circuit that extends from the axial piston pump via a proportional valve back to the pumped coolant and has a branch-off between the axial piston pump and the proportional valve as the hydraulic actuator. A regulating slide valve adjusts coolant volume flow of depending on pressure in the hydraulic circuit. A sensor detects a parameter characteristic of the coolant volume flow and outputs an actual value signal. A dedicated pump control controls the proportional valve based on the actual value signal of the sensor and a desired value signal of the central engine control.

Abstract: The invention relates to an electric coolant pump for a coolant circuit of an internal combustion engine, having a radially accelerating pump impeller and a spiral housing section of a pump housing. A control circuit is arranged about an inlet on the side of the pump housing opposing the electric engine, and is accommodated in an ECU chamber. An open side of the pump chamber and an open side of the ECU chamber are separated by a heat-exchange cover, which is opened into the pump chamber at a mouth of the inlet, wherein a material from which the ECU chamber is made has a lower heat conductivity than a material from which the heat-exchange cover is made.

Abstract: A coolant pump for an internal combustion engine (ICE) in a vehicle with a central engine control, having a pump shaft that drives an impeller for pumping a coolant. An axial piston pump operated via a wobble plate on a rear face of the impeller, conducts part of the pumped coolant away to a hydraulic circuit that extends from the axial piston pump via a proportional valve back to the pumped coolant and has a branch-off between the axial piston pump and the proportional valve as the hydraulic actuator. A regulating slide valve adjusts coolant volume flow of depending on pressure in the hydraulic circuit. A sensor detects a parameter characteristic of the coolant volume flow and outputs an actual value signal. A dedicated pump control controls the proportional valve based on the actual value signal of the sensor and a desired value signal of the central engine control.

Abstract: A coolant pump for an internal combustion engine (ICE) in a vehicle with a central engine control, having a pump shaft that drives an impeller for pumping a coolant. An axial piston pump operated via a wobble plate on a rear face of the impeller, conducts part of the pumped coolant away to a hydraulic circuit that extends from the axial piston pump via a proportional valve back to the pumped coolant and has a branch-off between the axial piston pump and the proportional valve as the hydraulic actuator. A regulating slide valve adjusts coolant volume flow of depending on pressure in the hydraulic circuit. A sensor detects a parameter characteristic of the coolant volume flow and outputs an actual value signal. A dedicated pump control controls the proportional valve based on the actual value signal of the sensor and a desired value signal of the central engine control.

Abstract: A coolant pump for an internal combustion engine (ICE) in a vehicle with a central engine control, having a pump shaft that drives an impeller for pumping a coolant. An axial piston pump operated via a wobble plate on a rear face of the impeller, conducts part of the pumped coolant away to a hydraulic circuit that extends from the axial piston pump via a proportional valve back to the pumped coolant and has a branch-off between the axial piston pump and the proportional valve as the hydraulic actuator. A regulating slide valve adjusts coolant volume flow of depending on pressure in the hydraulic circuit. A sensor detects a parameter characteristic of the coolant volume flow and outputs an actual value signal. A dedicated pump control controls the proportional valve based on the actual value signal of the sensor and a desired value signal of the central engine control.

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: The invention is based on the task of developing an adjustable coolant pump driven by the engine, which pump does not require any outside energy for pressure and/or volume stream regulation, guarantees great failure safety, and is supposed to guarantee optimal warm-up of engines having great engine outputs relative to the displacement, which require coolant pumps having a very large design.

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: 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: 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: 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 present invention relates to a controllable cooling system (1) for a motor vehicle, comprising a coolant circuit which routes coolant to and out of an internal combustion engine, and to a mechanically operated, controllable main coolant pump (3) and an electrically operated, controllable secondary coolant pump (5). The cooling system further comprises a control device which controls the main coolant pump (3) and the secondary coolant pump (5) in dependence on operating conditions of the internal combustion engine. The invention furthermore provides an electrically operated, controllable secondary coolant pump (5) for such a cooling system (1), an impeller (25) for use in this secondary coolant pump (5), and a method for controlling the coolant flow in such a cooling system (1).

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 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: 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: 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.