A control arrangement for a coolant pump of an internal combustion engine includes a control slide which controls a throughflow cross-section of an annular gap arranged between an outlet of a coolant pump impeller and a surrounding delivery duct. A control pump adapts a hydraulic pressure generated in a flow duct. An electromagnetic valve includes a first and second valve seat, a first, second and third flow connection, a closing member and an armature. The first flow connection is fluidically connected to an outlet of the control pump. The second flow connection is fluidically connected to a first pressure chamber of the control slide. The third flow connection is fluidically connected to an inlet of the coolant pump. The first valve seat is arranged between the first flow connection and the second flow connection. The second valve seat is arranged between the second flow connection and the third flow connection.

The subject matter of the present invention is a variable-delivery pump device comprising a pump body (2), an impeller (5) and a shut-off element (8) capable of translational movement and adjustably covering at least part of the outer periphery of the impeller (5), as well as a cam element (9) which is rotationally driven and engages with said shut-off element (8) for effecting the translational movement thereof. The pump device (1) is characterized in that the shut-off element (8) and the cam element (9) have cylindrical walls (8′) and are arranged concentrically around the housing (7) that accepts the shaft (6) of the impeller (5), and in that the rotary cam element (9) is situated on the inside of the sliding shut-off element (8) and, on the external face of its wall, has at least one helical guideway (11) on which there runs at least one corresponding follower element (12) secured to the internal face of the wall (8′) of the shut-off element (8).

A multi-way coolant valve and a heat pump system having the same include an external housing in which first, second and third external inlets and first, second and third external outlets are formed; and an internal housing provided rotatably inside the external housing to selectively fluidically-connect the first, second and third external inlets, and the first, second and third external outlets, and divided into two stages through which a coolant flows respectively, wherein as the internal housing rotates at a predetermined interval in a selected mode of the vehicle, the first external inlet selectively fluidically-communicates with the first external outlet, the second external outlet, or the third external outlet, the second external inlet selectively fluidically-communicates with the first external outlet or the second external outlet, and the third external inlet selectively fluidically-communicates with the first external outlet, the second external outlet, or the third external outlet.

A variable mechanical automotive coolant pump includes a rotatable rotor shaft, an impeller wheel which is co-rotatably connected with the rotor shaft, a static guiding cylinder, a control sleeve, and at least one guiding device. The impeller wheel has a discharging radial outside. The control sleeve has a hollow-cylindrical control sleeve body having a radial outside. The control sleeve does not rotate and is guided axially slidable within the static guiding cylinder so as to regulate a flow rate of the variable mechanical automotive coolant pump by closing or opening the discharging radial outside of the impeller wheel. The at least one guiding device guides the radial outside of the control sleeve within the static guiding cylinder.

A controllable coolant pump of internal combustion engines includes a pump housing, a drivable pump shaft rotatably mounted in the pump housing, an impeller non-rotatably fixed on a free end of the pump shaft, and a pressure-difference-driven actuator to drive at least one piston rod which is guided in a piston rod bore of the pump housing and includes a control spool valve held at the impeller-side end of the piston rod. The control spool valve is set up to variably cover an outflow region of the impeller. The piston rod is guided in the piston rod bore by a guide bushing which is a portion of a sealing device which seals off a pump chamber carrying the coolant with respect to the pressure-difference-driven actuator.

A switchable mechanical motor vehicle coolant pump includes a rotatable drive shaft, a drive wheel, a coolant pump wheel comprising a radially outer outlet, a control slider, and an actuation system which hydraulically actuates the control slider. The drive wheel and the coolant pump wheel are each connected to the drive shaft. The control slider shifts axially with respect to the coolant pump wheel to at least partially close the radially outer outlet. The actuation system includes pressure chamber(s), an auxiliary pump having an auxiliary pump wheel provided integrally with the coolant pump wheel, and a switchable control valve which controls a pressure level within the pressure chamber(s). The auxiliary pump wheel provides a hydraulic actuation pressure for the pressure chamber(s) and comprises a ring-shaped pumping channel in which pumping vanes are arranged equidistantly along a circumference of the ring-shaped pumping channel so as to define equal pumping chambers therebetween.

A centrifugal pump with adaptive pump stages includes an impeller configured to provide kinetic energy to fluid flow through the pump. The impeller has multiple geometric dimensions. The pump includes a diffuser connected to the impeller that is configured to convert the kinetic energy provided by the impeller into static pressure energy to flow the fluid through the pump. The pump includes an adaptive material attached to the impeller that is configured to modify, during operation of the pump, a geometric dimension to modify fluid flow through the pump.

A centrifugal pump with adaptive pump stages includes an impeller configured to provide kinetic energy to fluid flow through the pump. The impeller has multiple geometric dimensions. The pump includes a diffuser connected to the impeller that is configured to convert the kinetic energy provided by the impeller into static pressure energy to flow the fluid through the pump. The pump includes an adaptive material attached to the impeller that is configured to modify, during operation of the pump, a geometric dimension to modify fluid flow through the pump.

A coolant pump for a vehicle includes an impeller mounted at one side of a shaft and configured for pumping a coolant, a pulley mounted at the other side of the shaft and configured for receiving a torque, a pump housing including an inlet for allowing the coolant to flow in and an outlet for allowing the coolant to flow out, a shroud disposed within the pump housing for selectively closing or opening the outlet and an operation portion selectively moving the shroud.

In an adjustable coolant pump for delivering a coolant for a combustion engine, a delivery flow of the coolant can be limited by a regulating slide which is actuated by a hydraulic actuator in a hydraulic control loop, wherein the hydraulic control loop is supplied with the coolant from the delivery flow, and includes an axial piston pump and a proportional valve for generation and adjustment of a pressure on the hydraulic actuator. A sliding shoe, which is arranged on an intake side of the axial piston pump, surrounds an inlet of the axial piston pump, and a filter disk for filtering the coolant prior to entry into the hydraulic control loop is in sliding contact with the sliding shoe so that coolant from the pump chamber is sucked into the axial piston pump through the filter disk and the sliding shoe, while a rotational movement of the filter disk is transformed into a stroke movement of the axial piston pump. The filter disk consists of a ceramic material.