US20220381178A1 - Motor vehicle cooling circuit - Google Patents

Motor vehicle cooling circuit Download PDF

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Publication number
US20220381178A1
US20220381178A1 US17/772,078 US202017772078A US2022381178A1 US 20220381178 A1 US20220381178 A1 US 20220381178A1 US 202017772078 A US202017772078 A US 202017772078A US 2022381178 A1 US2022381178 A1 US 2022381178A1
Authority
US
United States
Prior art keywords
screw
circuit
pump
driven
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US17/772,078
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English (en)
Inventor
Didier Richard
Lionel Martin
Dominique Vaginet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Assigned to ILLINOIS TOOL WORKS INC. reassignment ILLINOIS TOOL WORKS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VAGINET, DOMINIQUE, MARTIN, LIONEL, RICHARD, DIDIER
Publication of US20220381178A1 publication Critical patent/US20220381178A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F04C2/165—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type having more than two rotary pistons with parallel axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F01P2005/125—Driving auxiliary pumps electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/811—Actuator for control, e.g. pneumatic, hydraulic, electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/19—Temperature
    • F04C2270/195—Controlled or regulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/86—Detection

Definitions

  • the invention relates to the field of cooling circuits for vehicles, in particular motor vehicles.
  • a cooling circuit for a motor vehicle such as that shown in FIG. 1 , comprises in particular at least one pump 12 ensuring the circulation of a cooling liquid, such as water, in the cooling circuit.
  • a cooling liquid such as water
  • a cooling circuit may also comprise a reservoir 10 of cooling liquid, a heat exchanger 14 and at least one element 16 to be cooled, such as an engine of the vehicle.
  • the element 16 is equipped with a temperature sensor 20 of which the signals are transmitted to a control unit 18 for controlling a proportional valve 22 that makes it possible to regulate the flow rate of cooling liquid leaving the pump 12 and supplying the heat exchanger 14 .
  • the pump 12 is a centrifugal pump, meaning that it is a pump of which the rotor is formed by a bladed impeller that is configured to draw liquid in via the center and deliver it via its periphery.
  • the flow rate of cooling liquid at the outlet of the pump depends on the speed of rotation of the impeller but is not always constant, and it is therefore necessary to combine the proportional valve 22 mentioned above with this type of pump. Furthermore, there is a period of latency between a centrifugal pump being stopped and the flow rate at the outlet of the pump becoming zero. In the case in which the circuit comprises other (auxiliary) pumps, these pumps are also centrifugal pumps.
  • the present invention proposes a refinement to this technology.
  • the invention relates to a cooling circuit for a vehicle, in particular a motor vehicle, this circuit having a pump having at least one rotor that is driven in rotation by a motor and configured to force the circulation of cooling liquid in the circuit, characterized in that said at least one rotor comprises at least one driving screw that is driven by said motor, and at least one driven screw that is driven by said at least one driving screw, the driving screw(s) and driven screw(s) being configured to force the circulation of cooling liquid in the circuit.
  • a screw pump makes it possible to provide a flow rate at the outlet that is proportional to the speed of rotation of the motor and becomes zero as soon as the pump is stopped.
  • a screw pump in a cooling circuit, it is therefore understood that it would be conceivable to omit the proportional valve that is necessary when using a centrifugal pump.
  • another advantage is linked to the small bulk of a screw pump relative to a centrifugal pump.
  • the power of a screw pump can for example be optimized by adapting the length, the diameter and/or the number of the screws, whereas the power of a centrifugal pump can be optimized only by the diameter and the thickness of its impeller. It would furthermore be advantageous to use in the pump screws that are not made of metal but are rather made of plastic or composite material, in order to reduce the weight of the pump and make these screws easier to produce, for example by injection molding.
  • the number of driving screws and driven screws is nonlimiting and is determined in accordance with the requirements in terms of flow rate at the outlet of the pump in particular.
  • the circuit may comprise one or more of the following features, taken in isolation from one another or in combination with one another:
  • the present invention also relates to a vehicle, in particular a motor vehicle, having at least one circuit as described above.
  • FIG. 1 is a schematic view of a vehicle cooling circuit
  • FIG. 2 is a schematic view of a vehicle cooling circuit, according to one embodiment of the invention.
  • FIG. 3 is a schematic perspective view of a reservoir of cooling liquid equipped with a screw pump
  • FIG. 4 is an exploded schematic perspective view of a first embodiment of a screw pump
  • FIG. 5 is an exploded schematic perspective view of a second embodiment of a screw pump
  • FIG. 6 is an exploded schematic perspective view of a third embodiment of a screw pump.
  • FIG. 1 has been described above.
  • FIG. 2 illustrates a cooling circuit 24 within the meaning of the invention.
  • This circuit 24 comprises at least one screw pump 26 .
  • the circuit 24 also comprises a reservoir 10 of cooling liquid.
  • the screw pump 26 and the reservoir 10 may be two separate elements connected by at least one pipe, or they may be mounted on one another as in the example in FIG. 3 in which the pump 26 is fastened directly to the reservoir 10 .
  • the pump 26 comprises an inlet 26 a connected to the reservoir 10 or opening into this reservoir, and an outlet 26 b.
  • the screw pump 26 is connected to a heat exchanger 14 and to an element 16 to be cooled.
  • the outlet 26 b of the pump 26 is connected to an inlet 14 a of the exchanger 14 of which an outlet 14 b is connected to an inlet 16 a of the element 16 .
  • This element 16 comprises an outlet 16 b connected to the inlet 26 a of the pump 26 or to the reservoir 10 .
  • the element 16 is equipped with a temperature sensor 20 of which the signals are transmitted to a control unit 18 for controlling the screw pump 26 in order to regulate the flow rate of cooling liquid leaving the pump 26 and supplying the heat exchanger 14 .
  • a screw pump 26 comprises at least one driving screw that is driven by a motor, and at least one driven screw that is driven by the driving screw(s), the driving screw(s) and driven screw(s) being configured to force the circulation of cooling liquid in the circuit.
  • FIGS. 4 to 6 illustrate exemplary embodiments of a screw pump 26 .
  • the pump 26 comprises one driving screw 28 and one driven screw 30 .
  • the driving screw 28 has an elongate shape and comprises an end connected to a drive shaft 32 of the motor 33 , which is for example an electric motor.
  • the screw 28 comprises a helicoidal thread that extends substantially over its entire length.
  • the screw 28 is housed in a central first recess 34 of a cylindrical body 36 of the pump 26 .
  • the driven screw 30 has an elongate shape and extends alongside the driving screw 28 , parallel thereto.
  • the screw 30 comprises a helicoidal thread that extends substantially over its entire length and is complementary to that of the screw 28 , so that the screws are meshed and the screw 30 is driven in rotation by the screw 28 , which is itself driven in rotation by the shaft 32 .
  • the screw 30 is housed in a lateral second recess 38 of the body 36 .
  • the recesses 34 , 38 communicate with one another, as illustrated in the drawing.
  • the body 36 is fastened to one end of the motor 33 , and comprises for example at one axial end an annular fastening flange 36 a.
  • the pump 26 comprises one driving screw 28 and three driven screws 30 .
  • the driving screw 28 has an elongate shape and comprises an end connected to the drive shaft 32 of the motor.
  • the screw 28 comprises a helicoidal thread that extends substantially over its entire length.
  • the screw 28 is housed in a central first recess 34 of a cylindrical body 36 of the pump 26 .
  • the driven screws 30 each have an elongate shape and extend alongside the driving screw 28 , parallel thereto. They are regularly spaced apart from one another around the screw 28 .
  • Each screw 30 comprises a helicoidal thread that extends substantially over its entire length and is complementary to that of the screw 28 , so that the screws are meshed and so that each screw 30 is driven in rotation by the screw 28 , which is itself driven in rotation by the shaft 32 .
  • the screws 30 are housed in lateral recesses 38 of the body 36 .
  • the recesses 34 , 38 communicate with one another, as illustrated in the drawing.
  • the body 36 is fastened in a cowling 40 that is fastened to one end of the motor.
  • This cowling 40 defines the inlet 26 a and the outlet 26 b of the pump 26 .
  • the pump 26 comprises two driving screws 28 and two driven screws 30 .
  • Each driving screw 28 has an elongate shape and comprises a helicoidal thread that extends substantially over its entire length.
  • the driving screws 28 are disposed in parallel and side by side, and are housed in first recesses 34 of the body 36 .
  • Each screw 28 bears a pinion 42 at one axial end.
  • a toothed wheel 44 is disposed between the pinions 42 that are secured to the screws 28 , and is meshed with these pinions so as to form a gear train.
  • the toothed wheel 44 is mounted on the drive shaft of the motor (not visible) and drives the screws 28 by means of the pinions 42 .
  • the driven screws 30 each have an elongate shape and extend alongside the driving screws 28 , parallel thereto.
  • the axes of rotation of the screws 28 , 30 are parallel and are situated for example at four corners of a parallelepiped.
  • Each screw 30 comprises a helicoidal thread that extends substantially over its entire length and is complementary to that of the screw 28 , so that the screws are meshed and so that each screw 30 is driven in rotation by one of the screws 28 .
  • the screws 30 are housed in lateral recesses 38 of the body 36 .
  • the recesses 34 , 38 communicate with one another, as illustrated in the drawing.
  • the body 36 is mounted in a cowling 40 that is fastened to one end of the motor.
  • This cowling 40 defines the inlet and the outlet 26 b of the pump 26 .
  • the screws 28 , 30 are advantageously made from plastic or composite material. They are for example produced by injection molding, which makes it possible to have screws with complex shapes at a relatively limited cost.
  • the invention affords a number of advantages, such as one or more of the following:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
US17/772,078 2019-10-31 2020-10-14 Motor vehicle cooling circuit Pending US20220381178A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP19206687.6 2019-10-31
EP19206687.6A EP3816446A1 (fr) 2019-10-31 2019-10-31 Circuit de refroidissement d'un vehicule automobile
PCT/US2020/055467 WO2021086603A1 (en) 2019-10-31 2020-10-14 Motor vehicle cooling circuit

Publications (1)

Publication Number Publication Date
US20220381178A1 true US20220381178A1 (en) 2022-12-01

Family

ID=68426179

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/772,078 Pending US20220381178A1 (en) 2019-10-31 2020-10-14 Motor vehicle cooling circuit

Country Status (4)

Country Link
US (1) US20220381178A1 (zh)
EP (1) EP3816446A1 (zh)
CN (1) CN114585805A (zh)
WO (1) WO2021086603A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3136524A1 (fr) * 2022-06-10 2023-12-15 Illinois Tool Works Pompe à vis et ses composants
FR3136525A1 (fr) * 2022-06-10 2023-12-15 Illinois Tool Works Pompe à vis et ses composants
FR3136521A1 (fr) * 2022-06-10 2023-12-15 Illinois Tool Works Pompe à vis et ses composants

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US3667879A (en) * 1969-02-12 1972-06-06 Orazio Cerpelli Screw pump
US4684335A (en) * 1984-10-24 1987-08-04 Stothert & Pitt Plc Pumps
US5738505A (en) * 1995-09-05 1998-04-14 Nuovo Pignone S.P.A. Perfected twin-screw pump, particularly suitable for the pumping of biphase fluids in a submerged environment
US20040191092A1 (en) * 2003-03-28 2004-09-30 Donoho Michael R. Multiple pump housing
US20130236334A1 (en) * 2010-11-16 2013-09-12 Shanghai Power Tech. Screw Machinery Co., Ltd. Double-screw liquid pump
US20140303838A1 (en) * 2013-04-08 2014-10-09 Hyundai Motor Company Method for controlling water pump of vehicle and system thereof
US20150369241A1 (en) * 2013-03-01 2015-12-24 Netzsch Pumpen & Systeme Gmbh Screw Pump
US20160108914A1 (en) * 2014-10-16 2016-04-21 Johnson Electric S.A. Gear pump
US20180216614A1 (en) * 2015-08-31 2018-08-02 Denso Corporation Screw pump
US20180320685A1 (en) * 2015-11-02 2018-11-08 Flowserve Management Company Multi-phase pump with cooled liquid reservoir
US20190338769A1 (en) * 2016-09-30 2019-11-07 Daikin Industries, Ltd. Gear pump or gear motor
US20210054840A1 (en) * 2019-08-19 2021-02-25 Progress Rail Locomotive Inc. Oil pump for an aged engine
US20210388833A1 (en) * 2018-12-20 2021-12-16 Audi Ag Drive device for a motor vehicle
US11268512B2 (en) * 2017-01-11 2022-03-08 Carrier Corporation Fluid machine with helically lobed rotors

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1701198A (en) * 1927-06-07 1929-02-05 Sinclair Refining Co Hot-oil pump
US3667879A (en) * 1969-02-12 1972-06-06 Orazio Cerpelli Screw pump
US4684335A (en) * 1984-10-24 1987-08-04 Stothert & Pitt Plc Pumps
US5738505A (en) * 1995-09-05 1998-04-14 Nuovo Pignone S.P.A. Perfected twin-screw pump, particularly suitable for the pumping of biphase fluids in a submerged environment
US20040191092A1 (en) * 2003-03-28 2004-09-30 Donoho Michael R. Multiple pump housing
US20130236334A1 (en) * 2010-11-16 2013-09-12 Shanghai Power Tech. Screw Machinery Co., Ltd. Double-screw liquid pump
US20150369241A1 (en) * 2013-03-01 2015-12-24 Netzsch Pumpen & Systeme Gmbh Screw Pump
US20140303838A1 (en) * 2013-04-08 2014-10-09 Hyundai Motor Company Method for controlling water pump of vehicle and system thereof
US20160108914A1 (en) * 2014-10-16 2016-04-21 Johnson Electric S.A. Gear pump
US20180216614A1 (en) * 2015-08-31 2018-08-02 Denso Corporation Screw pump
US20180320685A1 (en) * 2015-11-02 2018-11-08 Flowserve Management Company Multi-phase pump with cooled liquid reservoir
US20190338769A1 (en) * 2016-09-30 2019-11-07 Daikin Industries, Ltd. Gear pump or gear motor
US11268512B2 (en) * 2017-01-11 2022-03-08 Carrier Corporation Fluid machine with helically lobed rotors
US20210388833A1 (en) * 2018-12-20 2021-12-16 Audi Ag Drive device for a motor vehicle
US20210054840A1 (en) * 2019-08-19 2021-02-25 Progress Rail Locomotive Inc. Oil pump for an aged engine

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Publication number Publication date
EP3816446A1 (fr) 2021-05-05
CN114585805A (zh) 2022-06-03
WO2021086603A1 (en) 2021-05-06

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