Abstract: 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.

Abstract: 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.

Abstract: A coolant pump for providing a coolant to an engine includes a pump frame, a rotatable rotor shaft, a pulley wheel co-rotatably fixed to the rotor shaft, an axially shiftable ferromagnetic rotatable pump wheel, and an electromagnetic wet friction clutch arrangement. The pump wheel is axially shiftable with respect to the rotor shaft and the pump frame. The clutch arrangement comprises a static electromagnet, a clutch disk co-rotatably supported by the rotor shaft, a first clutch friction surface arranged at the clutch disk and a thereto corresponding second clutch friction surface arranged at the pump wheel, and a separate stop friction surface arranged at the pump wheel and a thereto corresponding static stop friction surface arranged at the static pump frame. The electromagnet, when fully energized, axially attracts the pump wheel so that the separate stop friction surface and the static stop friction surface engage to stop the pump wheel.

Abstract: A coolant pump includes an outlet volute comprising a pivot axis, an impeller pump, a housing, and an outlet valve arrangement. The housing comprises an outlet volute housing defining the outlet volute and comprises a volute housing wall comprising a recess, and a first outlet channel comprising a valve opening. The outlet valve arrangement is disposed in the first outlet channel and comprises a valve body which opens or closes the valve opening. The valve body comprises a circle segment body comprising a proximal surface and a maximum outside radius. The circle segment body is rotated around the pivot axis. The proximal surface is distant from the pivot axis by an offset distance which is at least ¼ of the maximum outside radius. The recess houses the circle segment body in the closed valve position. A lateral distance of the pivot axis to the volute housing wall is approximately equal to the offset distance.

Abstract: A coolant pump includes a rotatable rotor shaft, a pulley wheel which co-rotates with and is supported by the rotor shaft, a pump wheel rotatably supported at the rotor shaft, and an electrically switched wedge-coupled wet friction clutch. The wedge-coupled wet friction clutch comprises a clutch support fixed to the rotor shaft, a clutch ring arranged at a proximal side of the pump wheel, a clutch disk comprising a ferromagnetic element, a static electromagnet which axially pulls the clutch disk to the clutch support into a disengaged position when the static electromagnet is energized, and a wedge coupling mechanism. The wedge coupling mechanism comprises a wedge element and a counter-wedge element which are configured to generate an axial wedge force which axially pushes the clutch disk into an engaged position against the clutch ring when the static electromagnet is not energized and the rotor shaft rotates.

Abstract: A mechanical coolant pump for an internal combustion engine includes a pump rotor wheel comprising a blocking ring and rotor blades. The rotor blades are configured to pump a coolant radially outwardly. Variable pump stator blades are pivotably supported by a static blade holding ring at a first axial blade end. The variable pump stator blades are arranged radially outwardly of the pump rotor wheel. The blocking ring is arranged to partially overlap a second axial blade end.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a stationary cylindrical support body. A rotatable driving wheel is supported by a driving wheel roller bearing at the stationary cylindrical support body. The rotatable driving wheel is configured to be driven by the internal combustion engine. A pump wheel is arranged at a rotatable rotor shaft. The pump wheel is supported by a shaft roller bearing at the stationary cylindrical supporting body. A switchable friction clutch is configured to couple the rotatable driving wheel with the pump wheel. The stationary cylindrical support body integrally comprises an inner ring of the driving wheel roller bearing. The stationary cylindrical support body integrally comprises an outer ring of the shaft roller bearing.

Abstract: A coolant pump includes an outlet volute comprising a pivot axis, an impeller pump, a housing, and an outlet valve arrangement. The housing comprises an outlet volute housing defining the outlet volute and comprises a volute housing wall comprising a recess, and a first outlet channel comprising a valve opening. The outlet valve arrangement is disposed in the first outlet channel and comprises a valve body which opens or closes the valve opening. The valve body comprises a circle segment body comprising a proximal surface and a maximum outside radius. The circle segment body is rotated around the pivot axis. The proximal surface is distant from the pivot axis by an offset distance which is at least ¼ of the maximum outside radius. The recess houses the circle segment body in the closed valve position. A lateral distance of the pivot axis to the volute housing wall is approximately equal to the offset distance.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a pump wheel. A rotor shaft is arranged at the pump wheel. The rotor shaft is rotatable and radially supported. A driving wheel is rotatable, radially supported is driven by the internal combustion engine. A connecting device is connects the rotor shaft with the driving wheel so as to be rotatably fixed. A first roller bearing comprises a separate outer bearing ring. The separate outer bearing is directly fixed to a pump frame body. The first roller bearing directly radially supports the rotor shaft or the driving wheel. A separate bearing fixation structure axially pushes the separate outer bearing ring of the first roller bearing so as to be clearance-free against the pump frame body so that the separate bearing fixation structure is directly fixed to the pump frame body.

Abstract: A coolant pump includes a rotatable rotor shaft, a pulley wheel which co-rotates with and is supported by the rotor shaft, a pump wheel rotatably supported at the rotor shaft, and an electrically switched wedge-coupled wet friction clutch. The wedge-coupled wet friction clutch comprises a clutch support fixed to the rotor shaft, a clutch ring arranged at a proximal side of the pump wheel, a clutch disk comprising a ferromagnetic element, a static electromagnet which axially pulls the clutch disk to the clutch support into a disengaged position when the static electromagnet is energized, and a wedge coupling mechanism. The wedge coupling mechanism comprises a wedge element and a counter-wedge element which are configured to generate an axial wedge force which axially pushes the clutch disk into an engaged position against the clutch ring when the static electromagnet is not energized and the rotor shaft rotates.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a stationary cylindrical support body. A rotatable driving wheel is supported by a driving wheel roller bearing at the stationary cylindrical support body. The rotatable driving wheel is configured to be driven by the internal combustion engine. A pump wheel is arranged at a rotatable rotor shaft. The pump wheel is supported by a shaft roller bearing at the stationary cylindrical supporting body. A switchable friction clutch is configured to couple the rotatable driving wheel with the pump wheel. The stationary cylindrical support body integrally comprises an inner ring of the driving wheel roller bearing. The stationary cylindrical support body integrally comprises an outer ring of the shaft roller bearing.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a pump wheel. A rotor shaft is arranged at the pump wheel. The rotor shaft is rotatable and radially supported. A driving wheel is rotatable, radially supported is driven by the internal combustion engine. A connecting device is connects the rotor shaft with the driving wheel so as to be rotatably fixed. A first roller bearing comprises a separate outer bearing ring. The separate outer bearing is directly fixed to a pump frame body. The first roller bearing directly radially supports the rotor shaft or the driving wheel. A separate bearing fixation structure axially pushes the separate outer bearing ring of the first roller bearing so as to be clearance-free against the pump frame body so that the separate bearing fixation structure is directly fixed to the pump frame body.

Abstract: A mechanical coolant pump for an internal combustion engine includes a pump rotor wheel comprising a blocking ring and rotor blades. The rotor blades are configured to pump a coolant radially outwardly. Variable pump stator blades are pivotably supported by a static blade holding ring at a first axial blade end. The variable pump stator blades are arranged radially outwardly of the pump rotor wheel. The blocking ring is arranged to partially overlap a second axial blade end.