Abstract: An electric motor vehicle secondary assembly includes a housing body with a housing opening, a drive motor, a device driven by the drive motor, a connector arrangement with at least two exposed connector pins, a cast body with a connector core integrally molded thereon, and a motor control circuit board which is partially potted in the cast body. The connector core forms a connector base. The connector pins are each formed by a respective single rigid pin element which is directly electrically connected to the motor control circuit board. The connector core of the cast body encloses each pin element between the motor control circuit board and the connector base. The connector core is plugged into the housing opening of the housing body so that the connector base completely closes the housing opening and the pin elements project outward from the connector base through the housing opening.

Abstract: An electric motor vehicle auxiliary unit includes an electronically commutated drive motor comprising motor coils and an electronic commutator arrangement which energizes the motor coils. The electronic commutator arrangement includes a control unit, multiple power semiconductors each of which is controlled by the control unit, a motor current path, a motor current tap arranged in a course of the motor current path, and a high-pass filter arranged between the motor current tap and the control unit. The motor current tap is arranged so that a voltage signal proportional to a motor current IM drops at the motor current tap during a motor energization. The high-pass filter includes an input signal and an output signal. The input signal is the voltage signal and the output signal is a control signal for the control unit. The high-pass filter triggers a pole reversal after a delay following an input of a peak signal.

Abstract: A coolant pump includes a pump frame, a driving wheel driven by an engine, a pump wheel driven by the driving wheel, and a clutch which couples the driving wheel with the pump wheel. The clutch comprises a friction surface arranged at the driving wheel, and a clutch disc which corresponds to the friction surface. The clutch disk is connected with and co-rotates with the pump wheel, and is axially shiftable between an engaged and a disengaged position. An axial pretension spring pretensions the clutch disc into the disengaged position. A permanent magnet forces the clutch disc into the engaged position. An electromagnet, when energized, generates a polarization which is opposite to a polarization of the permanent magnet to reduce a total magnetic attraction force of the permanent magnet with respect to the clutch disc and to thereby push the clutch disc into the disengaged position via the pretension spring.

Abstract: A lubricant vane pump for providing a pressurized lubricant for an internal combustion engine includes a pump housing, a pump chamber, a shiftable control ring comprising a pressure-relief-valve, a pump rotor, a pretensioning element which pushes the control ring into a high pumping volume position, a control chamber, and a pump outlet cavity fluidically connected to the control chamber. The pump chamber comprises pump compartments which rotate from a charge to discharge zone. The control ring envelops the pump chamber. The pump rotor comprises radially slidable vanes which rotate in the control ring to provide the pump chamber with the pump compartments. A high lubricant pressure in the control chamber moves the control ring into a low pumping volume direction against the pretensioning element. The pressure-relief-valve of the control ring connects or disconnects the control chamber with one of the pump compartments between the charge zone and the discharge zone.

Abstract: A variable-displacement lubricant pump includes a first plunger. A control ring is pushed by the first plunger in a high pumping volume direction. The first plunger is arranged in a first control chamber with a side wall. A first pressure conduit connects a pump outlet port with the first control chamber. A pumping volume limitation unit is arranged so that the first plunger covers and closes an outlet opening arranged in the side wall in a lower pumping volume position of the control ring. A thermostatic element actuates a temperature controlled valve based on lubricant temperature. The thermostatic element pushes a shiftable valve body against a retraction spring to an extended closed end position when the lubricant has an operation temperature. The shiftable valve body is in a retracted closed end position at a cold lubricant temperature and in an intermediate open position at an intermediate lubricant temperature.

Abstract: A method for starting a drive motor. The drive motor includes a motor stator with stator coils and a motor rotor, and a control electronics system and a power electronics system which supply power to the stator coils with a predefined coil voltage and a predefined constant start-up rotation frequency to generate a rotating field to drive the motor rotor. The method includes supplying power to at least one stator coil with a coil voltage corresponding to a start value, increasing the coil voltage in steps, monitoring an electric current flowing through the power electronics system, and, when a specific minimum voltage drop is detected, terminating the increasing of the coil voltage in steps, and performing a safety increase of the coil voltage by increasing a start-up voltage value by a predefined safety value to a first operating voltage value where the motor rotor is drivable in an unregulated mode.

Abstract: A variable displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine includes a control ring configured to be shiftable, a pump rotor comprising a plurality of slidable vanes which are configured to rotate in the control ring, a hydraulic control chamber configured to directly actuate the control ring, a valve bore, and a temperature control valve configured to connect or disconnect the temperature control opening to an atmospheric pressure. The hydraulic control chamber comprises a side wall comprising a temperature control opening arranged therein. The temperature control valve comprises a switching strip which comprises a switching temperature. The switching strip is configured to be in an open position if a temperature is below the switching temperature, and to be in a closed position if the temperature is above the switching temperature so as to close the valve bore.

Abstract: A coolant pump includes an impeller pump wheel, a pump housing defining an outlet volute, and an outlet valve arrangement. The pump housing comprises an outlet volute housing which defines a first outlet channel comprising a valve opening. The valve opening is defined by a valve seat which defines a valve seat plane and a symmetry plane. The symmetry plane is arranged in the middle of and rectangular to the valve seat plane. The outlet valve arrangement is in the first outlet channel and comprises a valve flap which opens/closes the valve opening. The valve flap comprises a flap seat corresponding to the valve seat. The valve flap rotates around a pivot axis parallel to the symmetry plane and having an eccentricity from the symmetry plane which is between 1/20 and 1/1 of a distance of the pivot axis to the valve seat plane when the valve flap is open.

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 coolant pump for an internal combustion engine includes a pump housing defining an outlet volute, a first outlet channel comprising a first valve opening, a second outlet channel comprising a second valve opening, an impeller pump wheel, and an outlet valve arrangement. The second outlet channel is separate from and fluidically parallel to the first outlet channel. The impeller pump wheel pumps a liquid into the outlet volute. The outlet valve arrangement is fluidically upstream of the first outlet channel and the second outlet channel. The outlet valve arrangement comprises an integral valve body which pivots between an open position and a closed position. The valve body comprises a first retaining section and a second retaining section. When the valve body is in the closed position, the first retaining section completely closes the first valve opening and the second retaining section only partially closes the second valve opening.

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 motor vehicle auxiliary assembly electric motor includes a motor stator with stator coils. The motor stator is electronically commutated. A control electronics system drives the stator coils and is potted in a cast body. An electronics chamber is closed-off and has the control electronics system and the cast body arranged therein. A gas chamber is arranged adjacent to the cast body. A pressure equalization element ventilates and vents the gas chamber. An aeration shaft is arranged to pass through the cast body and fluidically connects the gas chamber to the atmosphere. The pressure equalization element is fluidically associated with the aeration shaft.

Abstract: A housing unit for electrical components for use in the automobile sector includes a housing part configured to be closed in a sealed manner by a housing cover arrangement. The housing cover arrangement comprises a membrane, at least one ventilation opening, a main cover element comprising a recess, and a cover closure element. The recess comprises an opening which is configured to be closed in a sealed manner by the membrane. The opening comprises a rib arrangement which is configured to pretension the membrane. The cover closure element is configured to close the recess so as to provide the at least one ventilation opening.

Abstract: A automotive coolant pump includes a pulley wheel fixedly supported by a rotatable rotor shaft. A shaft sealing separates a dry pump section from a wet pump section. A pump wheel is supported in the wet pump section by the rotor shaft and is axially slidable between a pumping and a non-pumping position. An actuator is arranged in the dry pump section. A linear actuator rod is arranged in parallel to and eccentrically with respect to the rotor shaft. The linear actuator rod comprises a dry and a wet section. A rod sealing is actuated by the actuator and separates the dry from the wet of the linear actuator rod. A shift ring is arranged so as to be axially shiftable and rotatably fixed at the rotor shaft in the wet pump section. The shift ring is moved axially by the actuator rod and axially moves the pump wheel.

Abstract: An automotive electric liquid pump includes a separation can having a radial inside which includes a static bearing ring, a pump rotor, and a motor rotor which rotates in the separation can. The motor rotor includes a radial outside having a cylindrical rotor bearing ring. The static bearing ring of the separation can corresponds to the cylindrical rotor bearing ring of the motor rotor. A first radial slide bearing is defined by the cylindrical rotor bearing ring and the static bearing ring.

Abstract: A mechanical coolant pump for an internal combustion engine includes an impeller pump wheel. The pump housing comprises an outlet valve arrangement arranged between an outlet volute and a pump outlet, and a support portion. The pump housing closes and/or opens a valve opening. The outlet valve arrangement comprises a valve body which pivots. The valve body comprises a closing element which covers the valve opening, and first and second end disks. The closing element comprises an opening seat in a closed valve position. The first and second end disks are parallel to each other, are arranged at opposite axial ends of, and perpendicular to, the closing element, and rotate around a pivot axis. The first and second end disks each comprise a radial clamping nose which acts with the support portion to radially push the closing element against the opening seat in a closed valve position.

Abstract: A motor vehicle vacuum pump includes a pumping chamber in which a pump rotor rotates to compress a gas, an outlet chamber into which the gas exits, a separation wall which includes a valve opening and a valve seat arranged on an outlet side of the separation wall around the valve opening. The separation wall separates the pumping chamber from the outlet chamber. An outlet valve is formed as a non-return valve in the separation wall. The outlet valve is formed by the valve opening in the separation wall and includes a valve body with a closing body. The outlet valve has the gas exit therethrough from the pumping chamber into the outlet chamber. A corresponding part of the closing body is supported on the valve seat when the closing body is in a closed position. The valve seat and/or the corresponding part of the closing body includes microgrooves.

Abstract: An arrangement of motor vehicle units includes a vacuum pump, a power brake unit, a pump which pumps a hydraulic fluid with a control pressure, and a control valve. The vacuum pump comprises a pump rotor, a coupling element, a control connection, a coupling arrangement switchable by the control connection to lock/unlock the coupling element with the pump rotor, and a suction connection. The power brake unit comprises a negative pressure chamber connected with the suction connection. The control valve, when unlocked, switches the control pressure of the hydraulic fluid through to the control connection to unlock. The control valve comprises an actuator acted on by a pressure of the negative pressure chamber which switches the control pressure through to the control connection if the pressure in the negative pressure chamber is greater than a threshold pressure so that the switchable control valve is switched into its unlocked state.

Abstract: A motor vehicle vacuum pump includes a pump rotor, a coupling element, and a clutch arrangement. The clutch arrangement locks or releases the coupling element to/from the pump rotor so that the coupling element rotates together with or is released from the pump rotor. The clutch arrangement comprises a bolt holder connected to the pump rotor or to the coupling element to rotate therewith, an axially displaceable guide body, and a catch body connected to the coupling element or to the pump rotor to rotate therewith. The bolt holder comprises a bolt guide and a bolt body displaceable therein. The guide body is assigned to the bolt holder and comprises a guiding surface inclined with respect to an axial plane. The bolt body is forced radially into a locking position via the guiding surface. The catch body has a catch depression wherewith the bolt body engages in the locking position.

Abstract: An electric motor vehicle coolant pump includes a pump rotor which pumps a coolant and a drive motor which drives the pump rotor. The drive motor includes a dry motor stator comprising motor coils, a wet motor rotor, and a gap tube configured to separate the dry motor stator and the wet motor rotor from each other in a fluid-tight manner. The gap tube is formed by an integral sheet metal body which, in a gap region between the wet motor rotor and the dry motor stator consists of an austenitic high-grade steel comprising a material thickness of <0.5 mm, a hardness of from 200 to 500, a specific electrical resistance >0.10?×mm2/m, and a relative magnetic permeability<20. The integral sheet metal body forms a sheet metal shell sliding bearing shell of a sliding bearing to radially mount the wet motor rotor.