EP3306095B1 - Ölversorgungsvorrichtung und verfahren zur steuerung einer elektrischen ölpumpe - Google Patents

Ölversorgungsvorrichtung und verfahren zur steuerung einer elektrischen ölpumpe Download PDF

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Publication number
EP3306095B1
EP3306095B1 EP16799829.3A EP16799829A EP3306095B1 EP 3306095 B1 EP3306095 B1 EP 3306095B1 EP 16799829 A EP16799829 A EP 16799829A EP 3306095 B1 EP3306095 B1 EP 3306095B1
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EP
European Patent Office
Prior art keywords
pump
oil
volumetric change
electric oil
rotary volumetric
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.)
Active
Application number
EP16799829.3A
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English (en)
French (fr)
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EP3306095A4 (de
EP3306095A1 (de
Inventor
Kan YASHIMA
Takashi Doi
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.)
Mikuni Corp
Original Assignee
Mikuni Corp
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Filing date
Publication date
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Publication of EP3306095A4 publication Critical patent/EP3306095A4/de
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Publication of EP3306095B1 publication Critical patent/EP3306095B1/de
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Classifications

    • 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
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • 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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F04C13/002—Pumps for particular liquids for homogeneous viscous liquids
    • 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
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • 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
    • F04C14/04—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible machines or pumps
    • 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
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil
    • 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
    • F04C2240/20—Rotors
    • 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

Definitions

  • the present invention relates to an oil supply device in which negative pressure generated inside a pump chamber is reduced or eliminated when an electric oil pump is to be shut down, and a method of controlling an electric oil pump.
  • Oil supply devices used for cooling a motor of a hybrid car, a generator, and the like employ an electric oil pump.
  • Rotary volumetric change pumps are widely used as the electric oil pump (for example, refer to Patent Literature 1).
  • FIG. 4(a), Fig. 4(b), Fig. 4(c), Fig. 4(d) and Fig. 4(e) are operation diagrams for describing an operation of the rotary volumetric change pump in which a rotor rotates, in the order of Fig. 4(a), Fig. 4(b), Fig. 4(c), Fig. 4(d) and Fig. 4(e) .
  • the drawings illustrate an example of steps of intaking, compressing, and discharging oil 40 performed in one pump chamber. Regions filled with the oil are indicated with oblique lines.
  • a rotary volumetric change pump 20 is provided with an inner rotor 21 and an outer rotor 22 of which the numbers of teeth are different from each other.
  • the inner rotor 21 serves as an external gear
  • the outer rotor 22 serves as an internal gear
  • each of the rotors has a tooth form formed based on a trochoid curve.
  • the inner rotor 21 has four teeth
  • the outer rotor 22 has five teeth.
  • a circumscribed portion of the outer rotor 22 is accommodated in a round casing (not illustrated).
  • Fig. 4(a), Fig. 4(b), Fig. 4(c), Fig. 4(d) and Fig. 4(e) illustrates an example of clockwise rotation as indicated with the arrow.
  • the rotary volumetric change pump 20 is driven when a brushless DC motor or the like causes the inner rotor 21 to rotate.
  • the operation of the motor is configured to be controlled by an electric oil pump controller in response to a command from a host controller (for example, refer to Patent Literature 1).
  • the oil 40 is taken into the pump chamber through the intake side 31 and negative pressure is generated inside the pump chamber.
  • the viscosity of the oil 40 increases and the oil 40 is unlikely to be taken in. Consequently, higher negative pressure is generated.
  • US 2001/055528 A1 discloses a progressive cavity pumping system for use in pumping an associated aggregate material.
  • the progressive cavity pumping system includes a pump housing, a rotor member operatively received in the pump housing, a prime mover coupled to the rotor member, and a controlling means for actuating the prime mover.
  • JP 2004-353624 A discloses a control device for a motor-driven liquid pump configured to detect rotational frequency of the liquid pump to determine whether the pump is biting foreign matter. If it is determined that foreign matter has entered the pump, the control device rotates the electric motor in a reverse direction followed by at least one rotation in the forward direction.
  • JP H06 30482 U discloses an inner gear pump including a reservoir to store lubricating oil when the pump is not active, so as to speed up priming of the pump upon reactivation.
  • an object of the present invention is to provide an oil supply device in which negative pressure inside a pump chamber is reduced or eliminated when an electric oil pump is shut down, thereby preventing air from entering the pump chamber and allowing oil to be supplied or to circulate smoothly, and a method of controlling an electric oil pump.
  • an oil supply device according to the subject-matter of claim 1.
  • the predetermined angle, by which the rotary volumetric change pump is caused to rotate in the direction opposite to the rotation direction during oil supply may be 360 degrees with respect to the inner rotor.
  • the kinematic viscosity coefficient of oil to be supplied using the rotary volumetric change pump may be equal to or higher than 1,000 mm 2 /s.
  • the oil supply device and the method of controlling an electric oil pump according to the present invention are employed, it is possible to avoid a state in which negative pressure is high inside a pump chamber of the rotary volumetric change pump when the electric oil pump is shut down, and it is possible to prevent air from entering the pump chamber through an intake side. Therefore, when being actuated afterward, the electric oil pump has an effect that a sufficient amount of oil can be smoothly applied immediately after the electric oil pump is actuated.
  • Fig. 1 is a block diagram of an oil supply device 10 of the present invention.
  • Fig. 2 illustrates a simplified diagram of an electric oil pump showing the internal structure.
  • the oil supply device 10 of the present invention causes cooling oil 40 to circulate, thereby cooling a cooling subject device 17 such as an electric motor and a generator.
  • the oil supply device 10 includes a rotary volumetric change pump 20 and an electric oil pump 11 provided with a motor 12 which operates the rotary volumetric change pump 20.
  • the rotary volumetric change pump 20 has a structure in which an inner rotor 21 serves as an external gear, an outer rotor 22 serves as an internal gear, and each of the rotors has a tooth form formed based on a trochoid curve.
  • a circumscribed portion of the outer rotor 22 is accommodated in a round casing.
  • the centers of the inner rotor 21 and the outer rotor 22 do not coincide with each other, thereby being provided with a certain eccentricity.
  • a gap between the inner rotor 21 and the outer rotor 22 becomes the inside of a pump chamber.
  • the gap which is the inside of the pump chamber is widened or narrowed, thereby allowing operation of a pump.
  • the intake side 31 of the pump chamber and the discharge side 33 of the pump chamber are the places which are each surrounded by the bold line in Fig. 2 .
  • the cooling oil 40 accumulated in an oil sump of an oil pan 15 is suctioned up through an intake port 30 by the rotary volumetric change pump 20, and the cooling oil 40 is pressure-fed to the cooling subject device 17, such as the electric motor and the generator, through a discharge port 32 via an oil cooler 16.
  • the oil cooler 16 radiates heat of the oil 40 passing through. Then, the oil 40 which has cooled the cooling subject device 17 is configured to return to the oil pan 15.
  • the rotary volumetric change pump 20 is operated when a movement of the motor 12 is transmitted to the inner rotor 21, and the operation of the motor 12 is controlled by an electric oil pump controller 13.
  • a host controller 14 sends a control signal to this electric oil pump controller 13.
  • Fig. 3 is a flow chart of control over the motor 12 conducted by the electric oil pump controller 13.
  • Step S10 at the start work is performed to turn on power, for example, an engine of a vehicle is started.
  • Step S11 the electric oil pump controller 13 receives a motor control signal. Then, in Step S12, it is determined whether or not the received control signal has changed.
  • Step S12 when the control signal has not changed, the state is retained as it is, and the electric oil pump controller 13 waits for reception of a control signal again.
  • Step S13 the process proceeds to Step S13, and it is determined whether or not the control signal is for operation or not.
  • Step S13 when it is determined that the control signal is for operation, the process proceeds to Step S14, and the motor 12 is caused to rotate normally.
  • Step S13 when it is determined that the control signal is not for operation, that is, in a case of a control signal for shutdown, the process proceeds to Step S15, and the motor 12 is caused to temporarily stop. Furthermore, the process proceeds to Step S16, and the motor 12 is caused to rotate reversely by a certain amount of rotation, thereby eliminating the negative pressure inside the pump chamber. Lastly, the process proceeds to Step S17, and the motor 12 is completely shut down.
  • the angle of the reverse rotation required to eliminate the negative pressure is determined depending on various factors such as the viscosity coefficient of oil and the shapes of rotors. Therefore, the angle varies case by case. However, in order to suppress generation of excessive negative pressure, it is considered that a sufficient effect can be obtained when the inner rotor 21 is caused to rotate reversely by 360 degrees.
  • the present invention is characterized in that after it is determined that a control signal is not for operation any longer, a step is performed at all times, in which the motor is caused to temporarily stop, the motor is caused to rotate reversely, and the motor is then completely shut down. If it is intended to determine whether or not the motor is to be caused to rotate reversely in accordance with the magnitude of negative pressure inside the pump chamber, the oil pressure has to be measured, so that there is a need to separately provide a device therefor.
  • the motor is caused to rotate reversely at all times, and the angle of the reverse rotation is set in advance within a range in which a sufficient effect can be obtained and the circulation of oil is not affected. Accordingly, even though no extra device is provided, it is possible to achieve a sufficient effect.
  • the configuration of the present invention is not limited to only oil pumps used for cooling a device and can also be widely utilized in devices in which fluid having a high viscosity coefficient is supplied and circulates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)

Claims (6)

  1. Ölversorgungsvorrichtung (10), umfassend:
    eine elektrische Ölpumpe (11), in der eine rotierende Volumenänderungspumpe (20), bereitgestellt mit einem Innenrotor (21) und einem Außenrotor (22), durch einen Motor (12) betrieben wird; und
    dadurch gekennzeichnet, dass sie ferner umfasst:
    eine elektrische Ölpumpen (11) Steuerung, die den Motor (12) steuert, so dass, wenn die elektrische Ölpumpe (11) abgeschaltet werden soll, die rotierende Volumenänderungspumpe (20) veranlasst wird, vorübergehend anzuhalten und sich um einen vorbestimmten Winkel in einer Richtung entgegengesetzt zu einer Rotationsrichtung während der Ölversorgung zu drehen, und die elektrische Ölpumpe (11) dann abgeschaltet wird, so dass der negative Druck auf einer Einlassseite (31) von einer Pumpenkammer in der rotierenden Volumenänderungspumpe (20) reduziert oder eliminiert ist, dadurch Luft vom Eintreten in die Pumpenkammer abgehalten wird.
  2. Ölversorgungsvorrichtung (10) gemäß Anspruch 1,
    wobei der vorbestimmte Winkel, durch den die rotierende Volumenänderungspumpe (20) veranlasst wird, in die Richtung entgegengesetzt der Drehrichtung während der Ölversorgung zu drehen, 360 Grad in Bezug auf den Innenrotor (21) beträgt.
  3. Ölversorgungsvorrichtung (10) gemäß Anspruch 1 oder 2,
    wobei ein kinematischer Viskositätskoeffizient des zuzuführenden Öls unter Verwendung der rotierenden Volumenänderungspumpe (20) gleich oder höher als 1.000 mm2/s ist.
  4. Verfahren zum Steuern einer elektrischen Ölpumpe (11), dadurch gekennzeichnet, dass sie umfasst:
    Steuern eines Motors (12), sodass, wenn die elektrische Ölpumpe (11), in der eine rotierende Volumenänderungspumpe (20), bereitgestellt mit einem Innenrotor (21) und einem Außenrotor (22), durch den Motor (12) betrieben wird, abgeschaltet werden soll, wobei die rotierende Volumenänderungspumpe (20) veranlasst wird, vorübergehend anzuhalten und sich um einen vorbestimmten Winkel in einer Richtung entgegengesetzt zu einer Drehrichtung während der Ölversorgung zu drehen, sodass der negative Druck auf einer Einlassseite (31) einer Pumpenkammer in der rotierende Volumenänderungspumpe (20) reduziert oder eliminiert ist, dadurch Luft vom Eintreten in die Pumpenkammer abgehalten wird und die elektrische Ölpumpe (11) dann angehalten wird.
  5. Verfahren zum Steuern einer elektrischen Ölpumpe (11) gemäß Anspruch 4,
    wobei der vorbestimmte Winkel, durch den die rotierende Volumenänderungspumpe (20) veranlasst wird, sich in die Richtung entgegengesetzt der Drehrichtung zu drehen, während Ölversorgung, 360 Grad in Bezug auf den Innenrotor (21) beträgt.
  6. Verfahren zum Steuern einer elektrischen Ölpumpe (11) gemäß Anspruch 4 oder 5,
    wobei ein kinematischer Viskositätskoeffizient des zuzuführenden Öls unter Verwendung der rotierenden Volumenänderungspumpe (20) gleich oder größer als 1.000 mm2/s ist.
EP16799829.3A 2015-05-25 2016-05-12 Ölversorgungsvorrichtung und verfahren zur steuerung einer elektrischen ölpumpe Active EP3306095B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015105767A JP6570878B2 (ja) 2015-05-25 2015-05-25 オイル供給装置及び電動オイルポンプの制御方法
PCT/JP2016/064163 WO2016190121A1 (ja) 2015-05-25 2016-05-12 オイル供給装置及び電動オイルポンプの制御方法

Publications (3)

Publication Number Publication Date
EP3306095A1 EP3306095A1 (de) 2018-04-11
EP3306095A4 EP3306095A4 (de) 2019-01-09
EP3306095B1 true EP3306095B1 (de) 2020-04-22

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Application Number Title Priority Date Filing Date
EP16799829.3A Active EP3306095B1 (de) 2015-05-25 2016-05-12 Ölversorgungsvorrichtung und verfahren zur steuerung einer elektrischen ölpumpe

Country Status (5)

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US (1) US20180135624A1 (de)
EP (1) EP3306095B1 (de)
JP (1) JP6570878B2 (de)
CN (1) CN107614877B (de)
WO (1) WO2016190121A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112780428B (zh) * 2019-11-05 2023-09-29 纬湃汽车电子(芜湖)有限公司 油泵堵转诊断与修复方法、油泵控制器和供油系统

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
GB282707A (en) * 1926-12-29 1928-07-26 James Butler Tuthill Improvements in rotary pumps
JPH0429774A (ja) * 1990-05-28 1992-01-31 Takahiro Hoshino 粘性液吐出用ポンプ装置
JP3178093B2 (ja) * 1992-07-10 2001-06-18 松下電器産業株式会社 給湯器の送受信装置
JPH0630482U (ja) * 1992-09-21 1994-04-22 株式会社大盛鉄工所 オイルポンプ
JP2845174B2 (ja) * 1995-08-21 1999-01-13 大同機械製造株式会社 内転歯車ポンプ
US5711408A (en) * 1996-05-09 1998-01-27 Dana Corporation Reversible gerotor pump
JPH1193859A (ja) * 1997-09-18 1999-04-06 Matsushita Electric Ind Co Ltd ポンプ駆動装置
JP3415417B2 (ja) * 1997-11-25 2003-06-09 株式会社東芝 モータ制御装置
US6530750B2 (en) * 2000-03-21 2003-03-11 Hy-Flex Corp. Control for progressive cavity pump
JP2004353624A (ja) * 2003-05-30 2004-12-16 Aisin Seiki Co Ltd 電動液体ポンプの制御方法および装置
JP2006258076A (ja) * 2005-03-18 2006-09-28 Aisin Seiki Co Ltd 電動液体ポンプ、その制御方法および制御装置
JP2007291962A (ja) * 2006-04-25 2007-11-08 Komatsu Ltd 流体ポンプ
CN201057143Y (zh) * 2007-06-18 2008-05-07 昆明理工大学 单双缸卧式柴油机用机油泵

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
EP3306095A4 (de) 2019-01-09
EP3306095A1 (de) 2018-04-11
CN107614877A (zh) 2018-01-19
WO2016190121A1 (ja) 2016-12-01
CN107614877B (zh) 2019-10-15
JP6570878B2 (ja) 2019-09-04
US20180135624A1 (en) 2018-05-17
JP2016217316A (ja) 2016-12-22

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