EP3327291B1 - Pompe électrique à liquide de refroidissement pourvue d'unité de refroidissement ecu - Google Patents

Pompe électrique à liquide de refroidissement pourvue d'unité de refroidissement ecu Download PDF

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Publication number
EP3327291B1
EP3327291B1 EP17190784.3A EP17190784A EP3327291B1 EP 3327291 B1 EP3327291 B1 EP 3327291B1 EP 17190784 A EP17190784 A EP 17190784A EP 3327291 B1 EP3327291 B1 EP 3327291B1
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EP
European Patent Office
Prior art keywords
pump
power circuit
coolant
base section
electric coolant
Prior art date
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Application number
EP17190784.3A
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German (de)
English (en)
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EP3327291A1 (fr
Inventor
Jens Hoffmann
Christian BÄTZ
Tino Höhn
Franz Pawellek
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Nidec GPM GmbH
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Nidec GPM GmbH
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Publication of EP3327291A1 publication Critical patent/EP3327291A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—Mechanical details of the pump control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit

Definitions

  • the present invention relates to an electrical coolant pump on which cooling of the control unit or ECU of the pump is provided, and which in particular provides improved heat exchange between power electronics of the ECU and the coolant.
  • coolant pumps are preferably used for thermal management of internal combustion engines in vehicle construction.
  • the coolant pump as disclosed, for example, in DE19943577A1 is exposed to numerous environmental influences, such as temperature fluctuations, moisture and dirt, in the engine compartment of a vehicle.
  • coolant pumps including the electric drive are designed in an externally sealed or encapsulated design that is sealed against external influences.
  • Efforts have been made in various constructive configurations to integrate the power electronics in a heat exchange with the coolant, which is promoted by the coolant pump.
  • the coolant takes on a target temperature of about 110 ° while driving and can rise briefly to 120 ° or up to 130 ° under special load conditions.
  • a thermal window of the power electronics is tightly coupled to this temperature range of the coolant, overheating of the ECU can be prevented. Since a temperature of just a few ten degrees above can cause permanent damage to the electronics, only a small temperature difference remains to cause heat transfer.
  • FIG DE 10 2015 114 783 B3 An example from the prior art, which addresses the problem of a sufficient heat exchange between an ECU of a coolant pump and the conveyed coolant flow, is shown in FIG DE 10 2015 114 783 B3 described.
  • German patent of the same applicant describes an electric radial pump with a central axially extending inlet, which leads to a radially accelerating pump impeller, and a tangentially diverting outlet.
  • An ECU of the pump is located on a side of the pump housing that faces the electric motor and is arranged within a cover in the form of a donut or in a ring around the central inlet.
  • the front of the pump chamber, which faces the ECU, is closed off by a pump cover made of a material with high thermal conductivity, which enables improved heat exchange between the coolant in the pump chamber and the ECU.
  • an object of the present invention to provide an electrical coolant pump that ensures thermal stabilization of the ECU using standard formats and assembly processes, regardless of the configuration of an inlet or outlet.
  • the electric coolant pump comprises a pump housing with a pump chamber in which a pump impeller is rotatably received, a pump cover which closes the pump chamber on one side of the pump impeller, and at least one inlet and one outlet which are connected to the pump chamber; an electric motor having a rotor and a stator, which is arranged on a side of the pump chamber, which is opposite to the pump cover, on the pump housing; a pump shaft, rotatably supported on the pump housing, extending from the electric motor into the pump chamber, the rotor and the pump impeller being fixed thereon; and an electronic power circuit for controlling the stator with a power from an external power supply, which can be connected to the power circuit; wherein the pump housing has a receptacle for the electronic power circuit, which with respect to the pump shaft, radially outside the pump chamber and axially overlapping with an outer edge of the pump impeller, which faces the power circuit.
  • the invention provides for the first time to integrate an ECU in an electrical coolant pump, as in a known radial pump, in direct heat exchange with the pump housing at a position where convection by the coolant is strongest.
  • the coolant accelerated radially outwards by the blades of the pump impeller strikes the peripheral wall of the pump chamber or a spiral housing and is diverted into a circulating stream.
  • the convection of the impinging mass flow is thus further enhanced by convection due to the centrifugal pressure of a spiral current against the housing wall. Therefore, an arrangement according to the invention of the power circuit at a position in an axial overlap with the pump impeller achieves the best convection-related heat transfer on the housing wall between the electronic components and the mass flow of the coolant passed.
  • heat dissipation from the ECU is improved, which comes into play, for example, in the case of a maximum coolant temperature at which only a small temperature difference of a few degrees is available to effect heat transfer.
  • the intensive convection of the mass flow at the positioning according to the invention and the correspondingly large heat transfer which is removed from the coolant and transported away by the power circuitry on the inner wall of the pump chamber, generate heat when there are strong increases in power in the electronics dissipated faster.
  • a temperature rise in the ECU occurs earlier counteracted before the effect of a larger temperature difference to the coolant comes into play, which favors a delayed heat flow.
  • the positioning of the circuitry of the power electronics takes place on a circumferential area on which the shape of the ECU remains essentially unaffected by a configuration of an inlet and an outlet and by radial dimensions of the pump.
  • a conventionally dimensioned pump housing for example of the radial pump type, there is a sufficiently large area available to accommodate the area of a printed circuit board in standard dimensions and rectangular shape, which is assembled in a conventional manner.
  • the axial overlap between the power circuit and the pump impeller can be at least 10%, preferably 25% and particularly preferably 50% or more with respect to an axial dimension of the pump impeller or the pump chamber or a portion of the pump shaft on which the pump impeller is fixed.
  • the maximum effective range in the sense of the knowledge according to the invention is achieved from reaching an overlap range over the entire axial dimension of the pump impeller.
  • the dimensions of the overlap area thus correspond to an approximation to this optimum.
  • a circumference of the pump chamber can be designed in the form of a spiral housing from which the outlet emerges tangentially, and the receptacle for the electronic power circuit and the outlet can be arranged adjacent to one another.
  • the bypassing of the mass flow of the coolant is used in an even more advantageous manner for heat dissipation on the basis of an enlarged convection-effective area.
  • the receptacle for the electronic power circuit can comprise a base section, which forms a receptacle area for receiving the electronic power circuit, which runs essentially tangentially to the circumference of the pump chamber.
  • This configuration creates a flat surface for receiving the ECU, which compensates for curvatures or other configurations of the contour of the pump housing.
  • a circuit board of the power circuit can be in close contact with the receiving surface of the base section.
  • the heat transfer of the electronic power circuit to the pump housing is maximized by a large-area contact between the circuit board and the receptacle.
  • the base section can be formed in one piece together with the pump housing.
  • the previously mentioned compensation of the contours of the pump housing to a flat surface by a molded part e.g. is made from a die-cast, technically inexpensive to implement.
  • the one-piece design of the base section regardless of the material used, achieves the best possible thermal conductivity due to the fact that material transitions are omitted, the interfaces of which basically represent a resistance in a heat flow between a temperature difference.
  • the base section can have an internal rib structure with ribs and cavities therebetween that run essentially perpendicular to the receiving surface.
  • the ribs By forming a rib structure, it is possible to save material on a molded part as long as sufficient heat dissipation is guaranteed.
  • the ribs preferably run perpendicularly between the power circuit and the pump chamber or at least in such a way that the cavities do not interrupt a direct connection of the ribs between the power circuit and the pump chamber.
  • the base section can consist of aluminum or an aluminum alloy, which is suitable for production technology for a die casting process, injection molding process or 3D printing process.
  • a plate-shaped heat sink made of a solid material can be provided between the receiving surface of the base section and the electronic power circuit.
  • the plate shape of the heat sink enables heat to spread in the plane of the large-area contact with the circuit board, which favors a compensation of the temperature difference between the positions of electronic components with different amounts of power consumption.
  • the plate-shaped heat sink can be made from a solid material made of aluminum.
  • the thermal conductivity in the plane of the same and between the power circuit and the pump housing is increased in comparison to a die-cast alloy.
  • the plate-shaped heat sink can have at least one internal flow channel for the conveyed coolant, the at least one flow channel being connected to a circuit which branches off from a conveying flow in the coolant pump.
  • the base section can have at least one reservoir for the conveyed coolant, the at least one reservoir being connected to a circuit which is branched off from a conveying flow in the coolant pump.
  • the design of a reservoir with coolant increases the heat capacity based on the volume of the base section. Although the heat capacity of the Reservoirs stores the waste heat from the electronic power circuit, the connection to a circulation with coolant at the same time prevents an increase in the temperature of this heat store in the base section beyond the temperature of the coolant.
  • the at least one reservoir for the conveyed coolant can be designed to be open to the receiving surface of the base section and to be closed there by the plate-shaped heat sink.
  • This configuration combines the advantages of good thermal conductivity and heat dissipation in the plane, as well as an increased heat capacity with a limited rise in temperature, as explained in detail above.
  • the electronic power circuit can comprise capacitors and FETs, and the capacitors and / or FETs can be positioned in the receptacle within an axial overlap with the pump impeller.
  • the pump housing and at least one of the base section, the heat sink, the pump cover, or a further section of the pump housing can be connected by a weld seam which is introduced by means of atmospheric electron beam welding.
  • the construction of the pump assembly according to the invention can be realized in an economically advantageous and technically reliable manner with regard to strength and tightness, since such welded connections make a prior introduction of fits, threads and grooves for seals, as well as a conventional assembly effort for screws and seals obsolete .
  • a pump housing 1 comprises on one side a cavity in which an electric motor 3 is accommodated.
  • a stator 33 with stator coils is fixed within the cavity on the pump housing 1 and surrounds a motor rotor 32 with permanent magnetic elements which are exposed to magnetic fields of the stator coils which are switched in operation during operation, as a result of which a torque is generated on the rotor 32.
  • An open end of the cavity of the electric motor 3 is closed by a motor cover 14.
  • the motor rotor 32 is seated in a rotationally fixed manner on one end of a pump shaft 4, which is rotatably supported in the pump housing 1 in a central portion thereof and extends on the other side of the pump housing 1, which is opposite the electric motor 3, into a further cavity which has a pump chamber 10 forms.
  • a pump impeller 2 is fixed in a rotationally fixed manner on the other end of the pump shaft 4 in the pump chamber 10 and is rotated in a flow-effective manner by the torque generated on the motor rotor 32 during operation.
  • a pump cover 11 is inserted into an open axial end of the pump housing and closes the pump chamber 10 at the end of the pump shaft 4 on the pump impeller 2.
  • the pump cover 10 forms a centrally arranged suction port as a pump inlet 16, which axially feeds to an end face of the pump impeller 2.
  • the pump inlet 16 has another optional inlet for a separate cooling system.
  • the pump impeller 2 is a known radial pump impeller with a central opening adjacent to the intake port, which in the Figures 1 and 2 is not visible due to offset cutting planes to the shaft axis.
  • the delivery flow which flows axially through the pump inlet 16 through the pump inlet 16, is accelerated radially outward from the pump chamber 10 by the inner blades.
  • a spiral housing 12 At the periphery of the pump chamber 10 is a spiral housing 12, which is radial directed flow flows tangentially into a pressure port, which in the Figures 3 to 6 Pump outlet 17 shown forms.
  • a rectangularly delimited receptacle 13 is formed on the pump housing 1, in which a control unit or ECU of the pump including power electronics 30 of the electric motor 3 is embedded.
  • a base section 15 which compensates for an outer contour of the pump housing 1 and the spiral housing.
  • the base section 15 has an upward receiving surface 50 for the ECU with power electronics 30, which extends tangentially to the circumference of the pump housing 1 and plane-parallel to the pump shaft 4.
  • the contact surface 50 of the base section 15 thus forms a bottom surface of the receptacle 13.
  • Fig. 4 shows that on the receiving surface 50 of the base section 15, a heat sink 5 is attached, which consists of an aluminum plate and the dimensions of which fill the inner surface of the receptacle 13.
  • a circuit board 31 of the ECU with power circuit 30 is applied to the heat sink 5 and is in surface contact with the heat sink 5.
  • the structure of the circuitry on the printed circuit board 31 is shown schematically in simplified form on the basis of a section with electronic components of the ECU which are used for signal processing and electronic components which receive electrical power for supplying the electric motor 3.
  • the latter form a power circuit 30 which controls the coils of the stator 33 and thus converts the drive power of the electric motor 3 from an external power source.
  • the power electronics components that essentially contribute to heat generation are capacitors 35 and FETs (field effect transistors) 36, which in a typical configuration of a power circuit 30 in a plurality, such as, for example a number of the winding phases of the stator 33 are present.
  • the plurality of capacitors 35 and FETs 36 are represented in a simplified manner by a characteristic component.
  • a configuration of the power circuit 30 is arranged on an end section of the printed circuit board 31 on one side, which is aligned with the pump impeller 2 in an axial overlap region.
  • Other electronic components of the ECU that are used for signal processing and do not consume any significant electrical power, i.e. generate essentially no heat are arranged on the mounting positions of the printed circuit board 31, which is on the other side in the direction of the electric drive 3.
  • Connections for signal routing 37 and connections for connection to an external power source 38 are arranged on a front side of the printed circuit board 31 in the direction of the pump inlet 16.
  • the power circuit 30 is connected to the stator 33 via leads 34 to one of the opposite rear sides of the printed circuit board 31.
  • the base section 15 does not fill the entire intermediate space between the receiving surface 50 and an outer contour of the pump housing 1 or spiral housing 12.
  • the base section 15 consists of ribs 18 which are connected in a web-like manner, so that cavities are formed between the inner surfaces of the rectangular border of the receptacle 13 and the wall-like ribs 18 or webs.
  • the ribs 18 are connected in such a way that they form a rectangular interior, which serves as a reservoir 55 and absorbs coolant.
  • the receiving surface 50 in this embodiment is rather formed by a plane of upper edges of the rib-like ribs 18 on which the plate-shaped heat sink 5 rests and which provides a continuous surface for receiving the ECU with power circuit 30.
  • Threads are introduced at four corner points of the ribs 18 around the reservoir 55 in order to fasten the heat sink 5 by means of screws and to close off the reservoir 55 by means of a circumferential seal arranged on the receiving surface 50.
  • the circuit board 31 lies on the heat sink 5 with surface contact, and can be mounted thereon, for example, with a thermal paste.
  • the reservoir 55 is traversed by a circuit of the coolant, which is branched off from the delivery flow of the coolant pump, in order to provide cooling of the power circuit 30 of the ECU via the heat sink 5 in between.
  • a supply line 51 for supplying coolant to the reservoir 55 is provided through a through hole between a bottom surface of the reservoir 55 and the radial outer wall of the volute casing 12 at a position upstream of the pump outlet 17.
  • a return 52 of the circuit for cooling the power circuit 30 is formed by two through holes tapering at right angles to one another in a central section of the pump housing between the cavity of the electric drive 3 and the pump chamber 10, as in FIG Fig. 2 is shown.
  • the return 52 of the branched circuit leads from the reservoir 55 into an area of the pump chamber 10 behind the rear of the pump impeller 2.
  • the coolant pump according to the invention can be designed without a branched circuit with the inlet 51 and the return 53 and the reservoir 55.
  • the effect of heat dissipation from the power circuit 30 into the coolant is achieved in the axial overlap region with that of the pump impeller 2, in particular through good thermal conductivity of the base section 15 lying in between.
  • the base section 15 of the receptacle 13 is preferably formed in one piece with the pump housing.
  • an inner region of the base section 15 between a radial outer surface of the pump housing 1 or the spiral housing 12 and the receiving surface 50 is preferably completely filled with a material such as aluminum or an aluminum alloy or forms a rib structure with ribs 18 and cavities that are essentially perpendicular to one another extend the pump axis.
  • the base section 15, with or without a reservoir, made of solid material or with a rib structure, can itself provide a continuously flat surface as the receiving surface 50, with which the circuit board 31 of the power circuit 30 is brought into contact for large-area heat transfer.
  • the plate-shaped heat sink 5 can be designed according to the invention in such a way that it has an internal flow channel 53.
  • This embodiment can be realized, for example, by two halves of the heat sink 5 which are separated in the plane and in which a congruently shaped channel, e.g. through milled grooves, runs between the inlet 51 and the return 52.
  • the internal flow channel 53 can, for example, run in a meandering manner, so that, comparable to a miniature form of underfloor heating, a heat exchanger for cooling the power circuit 30 is formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (15)

  1. Pompe électrique à agent de refroidissement, présentant :
    un corps de pompe (1) avec une chambre de pompe (10) dans lequel un rouet de pompe (2) est reçu en rotation, un couvercle de pompe (11) qui referme la chambre de pompe (10) sur un côté du rouet de pompe (2), ainsi qu'au moins une admission (16) et une évacuation (17) qui sont reliées à la chambre de pompe (10) ;
    un moteur (3) électrique avec un rotor (32) et un stator (33) qui est agencé sur un côté de la chambre de pompe (10), qui se situe à l'opposé du couvercle de pompe (11), et contre le corps de pompe (1) ;
    un arbre de pompe (4) qui s'étend, monté en rotation contre le corps de pompe (1), depuis le moteur (3) électrique et jusqu'à la chambre de pompe (10), dans laquelle le rotor (32) et le rouet de pompe (2) sont fixés sur celui-ci ; ainsi que
    un circuit de puissance (30) électronique pour commander le stator (33) avec une puissance provenant d'une alimentation de puissance extérieure qui peut être reliée au circuit de puissance (30) ; dans laquelle
    le corps de pompe (1) présente une réception (13) pour le circuit de puissance (30) électronique qui, par rapport à l'arbre de pompe (4), est agencée radialement à l'extérieur de la chambre de pompe (10) ;
    caractérisée en ce que
    au moins une section d'extrémité d'une carte imprimée (31) du circuit de puissance (30) électronique est orientée vers un côté jusque dans une zone de chevauchement axiale avec un bord extérieur du rouet de pompe (2), lequel bord extérieur est tourné vers le circuit de puissance (30).
  2. Pompe électrique à agent de refroidissement selon la revendication 1, dans laquelle
    le chevauchement axial entre le circuit de puissance (30) et le rouet de pompe (2) s'élève à au moins 10 %, de préférence 25 % et particulièrement de préférence 50 % ou plus par rapport à une dimension axiale du rouet de pompe (2) ou de la chambre de pompe (10) ou d'une section de l'arbre de pompe (4) sur lequel le rouet de pompe (2) est fixé.
  3. Pompe électrique à agent de refroidissement selon la revendication 1 ou 2, dans laquelle
    une circonférence de la chambre de pompe (10) est conçue sous la forme d'un logement hélicoïdal (12) dont l'évacuation (17) émerge de façon tangentielle, et la réception (13) pour le circuit de puissance (30) électronique et l'évacuation (17) sont agencées de façon avoisinante l'une par rapport à l'autre.
  4. Pompe électrique à agent de refroidissement selon l'une des revendications précédentes, dans laquelle
    la réception (13) pour le circuit de puissance (30) électronique comprend une section de culot (15) qui forme une surface de réception (50) pour recevoir le circuit de puissance (30) électronique, laquelle surface de réception se déroule de façon essentiellement tangentielle vers la circonférence de la chambre de pompe (10).
  5. Pompe électrique à agent de refroidissement selon la revendication 4, dans laquelle
    la carte imprimée (31) du circuit de puissance (30) se situe en contact étroit avec la surface de réception (50) de la section de culot (15).
  6. Pompe électrique à agent de refroidissement selon la revendication 4 ou 5, dans laquelle
    la section de culot (15) est conçue d'une seule pièce ensemble avec le corps de pompe (1).
  7. Pompe électrique à agent de refroidissement selon l'une des revendications 4 à 6, dans laquelle
    la section de culot (15) présente une structure nervurée à l'intérieur avec des nervures (18) et des espaces creux intermédiaires qui se déroulent essentiellement perpendiculairement à la surface de réception (50).
  8. Pompe électrique à agent de refroidissement selon l'une des revendications 4 à 7, dans laquelle
    la section de culot (15) est constituée d'aluminium ou d'un alliage d'aluminium qui est approprié à des fins de fabrication pour un procédé de moulage sous pression, un procédé de moulage par injection ou un procédé d'impression 3D.
  9. Pompe électrique à agent de refroidissement selon l'une des revendications 4 à 8, dans laquelle
    un dissipateur thermique (5) en forme de plaque dans un matériau plein est fourni entre la surface de réception (50) de la section de culot (15) et le circuit de puissance (30) électronique.
  10. Pompe électrique à agent de refroidissement selon la revendication 9, dans laquelle
    le dissipateur thermique (5) en forme de plaque est fabriqué à partir d'un matériau plein en aluminium.
  11. Pompe électrique à agent de refroidissement selon la revendication 9 ou 10, dans laquelle
    le dissipateur thermique (5) en forme de plaque présente au moins un canal d'écoulement (53) intérieur pour l'agent de refroidissement acheminé, dans laquelle le au moins un canal d'écoulement (53) est relié à un circuit (51, 52) qui est dérivé d'un flux d'acheminement dans la pompe à agent de refroidissement.
  12. Pompe électrique à agent de refroidissement selon l'une des revendications 4 à 11, dans laquelle
    la section de culot (15) présente au moins un réservoir (55) pour l'agent de refroidissement acheminé, dans laquelle le au moins un réservoir (55) est relié à un circuit (51, 52) qui est dérivé d'un flux d'acheminement dans la pompe à agent de refroidissement.
  13. Pompe électrique à agent de refroidissement selon la revendication 12, dans laquelle
    le au moins un réservoir (55) pour l'agent de refroidissement acheminé est conçu ouvert vers la surface de réception (50) de la section de culot (15), et est refermée contre cette même surface de réception par le dissipateur thermique (5) en forme de plaque.
  14. Pompe électrique à agent de refroidissement selon l'une des revendications précédentes, dans laquelle
    le circuit de puissance (30) électronique comprend des condensateurs (35) et des transistors à effet de champ (36), et les condensateurs (35) et/ou les transistors à effet de champ (36) à l'intérieur d'un chevauchement axial sont positionnés avec le rouet de pompe (2) dans la réception (13).
  15. Pompe électrique à agent de refroidissement selon l'une des revendications précédentes, dans laquelle
    le corps de pompe (1) et au moins l'un parmi la section de culot (15), le dissipateur thermique (5), le couvercle de pompe (11) ou une autre section du corps de pompe (1) sont reliés par un cordon de soudure qui est introduit au moyen d'un soudage atmosphérique par faisceau d'électrons.
EP17190784.3A 2016-11-24 2017-09-13 Pompe électrique à liquide de refroidissement pourvue d'unité de refroidissement ecu Active EP3327291B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016122702.1A DE102016122702B4 (de) 2016-11-24 2016-11-24 Elektrische Kühlmittelpumpe mit ECU-Kühlung

Publications (2)

Publication Number Publication Date
EP3327291A1 EP3327291A1 (fr) 2018-05-30
EP3327291B1 true EP3327291B1 (fr) 2020-07-01

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DE (1) DE102016122702B4 (fr)

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CN110319027B (zh) * 2019-08-09 2024-05-28 苏州玲珑汽车科技有限公司 控制器侧面安装并附有冷却流道的汽车电子水泵及汽车
DE102020128170A1 (de) * 2020-10-27 2022-04-28 Nidec Gpm Gmbh Elektrische Kühlmittelpumpe
DE102021119564B4 (de) 2021-07-28 2023-03-16 Nidec Gpm Gmbh Fluidpumpe, insbesondere Flüssigfluidpumpe und Kraftfahrzeug aufweisend die Fluidpumpe

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DE102016122702B4 (de) 2023-11-16
DE102016122702A1 (de) 2018-05-24
EP3327291A1 (fr) 2018-05-30

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