US20130149170A1 - Method of controlling electric oil pump in hybrid vehicle - Google Patents

Method of controlling electric oil pump in hybrid vehicle Download PDF

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Publication number
US20130149170A1
US20130149170A1 US13/542,515 US201213542515A US2013149170A1 US 20130149170 A1 US20130149170 A1 US 20130149170A1 US 201213542515 A US201213542515 A US 201213542515A US 2013149170 A1 US2013149170 A1 US 2013149170A1
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US
United States
Prior art keywords
oil pump
electric oil
revolutions
controlling
open loop
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.)
Abandoned
Application number
US13/542,515
Other languages
English (en)
Inventor
Sang Lok Song
Sang Hyun Jeong
Hak Sung Lee
Seung Ki Kong
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.)
Hyundai Motor Co
Kia Corp
Original Assignee
Hyundai Motor Co
Kia Motors Corp
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 Hyundai Motor Co, Kia Motors Corp filed Critical Hyundai Motor Co
Assigned to KIA MOTORS CORPORATION, HYUNDAI MOTOR COMPANY reassignment KIA MOTORS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JEONG, SANG HYUN, KONG, SEUNG KI, LEE, HAK SUNG, SONG, SANG LOK
Publication of US20130149170A1 publication Critical patent/US20130149170A1/en
Abandoned legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/30Conjoint control of vehicle sub-units of different type or different function including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021Generation or control of line pressure
    • F16H61/0025Supply of control fluid; Pumps therefore
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • B60W20/10Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15Control strategies specially adapted for achieving a particular effect
    • B60W20/17Control strategies specially adapted for achieving a particular effect for noise reduction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18Propelling the vehicle
    • B60W30/192Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
    • B60W30/194Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine related to low temperature conditions, e.g. high viscosity of hydraulic fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H59/00Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68Inputs being a function of gearing status
    • F16H59/72Inputs being a function of gearing status dependent on oil characteristics, e.g. temperature, viscosity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00Input parameters relating to a particular sub-units
    • B60W2510/10Change speed gearings
    • B60W2510/107Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60YINDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00Type of vehicle
    • B60Y2200/90Vehicles comprising electric prime movers
    • B60Y2200/92Hybrid vehicles

Definitions

  • the present invention relates, in general, to a method of controlling an electric oil pump in a hybrid vehicle and, more particularly, to a method of controlling an electric oil pump at an ultra-low temperature.
  • a hybrid vehicle is provided with an electric oil pump, which can operate irrespective of the operation of an engine, in addition to a mechanical oil pump, which is provided inside a transmission, so that hydraulic pressure necessary for the transmission can be supplied even in a situation in which, for example, the engine does not operate.
  • the above-mentioned method of controlling an electric oil pump of the related art is generally carried out as shown in FIG. 1 .
  • the electric oil pump is controlled following a target number of revolutions that is provided from a transmission control unit (TCU).
  • TCU transmission control unit
  • the electric oil pump is controlled in an open loop up to a predetermined reference number of revolution, thereby rapidly increasing the number of revolution of the electric oil lamp.
  • closed loop control mode is performed by following the target number of revolutions that is provided from the TCU.
  • the reference number of revolutions is set in consideration of the viscosity of oil of the transmission, so that an intended oil pressure can be rapidly built up.
  • the electric oil pump is controlled in an open loop up to the reference number of revolutions of 500 RPM by the same method as that of the related art. Only after the number of revolutions has reached the reference number of revolutions, performed is a closed loop control mode, which follows the target number of revolutions. This consequently leads to a situation in which the number of revolutions of the electric oil pump is unnecessarily increased, as indicated by “A” in FIG. 2 .
  • Various aspects of the present invention provide for a method of controlling an electric oil pump in a hybrid vehicle, in which the electric oil pump is controlled so that the number of revolutions thereof is not unnecessarily increased at an ultra-low temperature, so as to prevent unnecessary power consumption of the battery, thereby contributing to an increase in fuel efficiency, to prevent unnecessary noise, thereby improving the market quality of the vehicle, and to improve the endurance of the electric oil pump.
  • Various aspects of the present invention provide for a method of controlling an electric oil pump in a hydraulic vehicle.
  • the method includes the steps of: measuring an oil temperature of a transmission; determining whether or not the oil temperature of the transmission is an ultra-low temperature that does not exceed a predetermined reference temperature; controlling the electric oil pump in an open loop up to a target number of revolutions when the oil temperature of the transmission is the ultra-low temperature as a result of the step of determining whether or not the oil temperature of the transmission is an ultra-low temperature; and controlling the electric oil pump in a closed loop in order to follow the target number of revolutions after the step of controlling the electric oil pump in the open loop is ended.
  • the electric oil pump of the hybrid vehicle may be controlled so that the number of revolutions thereof is not unnecessarily increased, so as to prevent unnecessary power consumption of the battery, thereby contributing to an increase in fuel efficiency, to prevent unnecessary noise, thereby improving the market quality of the vehicle, and to improve the endurance of the electric oil pump.
  • FIG. 1 is a graph showing a process of the related art, which controls an electric depicting pump at room temperature.
  • FIG. 2 is a graph depicting a process of the related art, which controls an electric depicting pump at ultra-low temperature.
  • FIG. 3 is a process view depicting an exemplary method of controlling an electric oil pump in a hybrid vehicle according to the present invention.
  • FIG. 4 is a graph depicting an exemplary process of controlling an electric oil pump at ultra-low temperature according to the present invention.
  • a method of controlling an electric oil pump in a hybrid vehicle includes oil temperature-measuring step S 10 of measuring the oil temperature of a transmission, ultra-low temperature determination step S 20 of determining whether or not the oil temperature of the transmission is an ultra-low temperature that does not exceed a predetermined reference temperature, first open loop control step S 30 of controlling the electric oil pump in an open loop up to the target number of revolutions, and closed loop control step S 40 of controlling the electric oil pump in a closed loop in order to follow the target number of revolutions.
  • the electric oil pump When the operation of the electric oil pump is started at an ultra-low-temperature state, the electric oil pump is not unconditionally controlled in an open loop up to a predetermined reference number of revolutions unlike the related art. Rather, the electric oil pump is controlled in the open loop up to a target number of revolutions that is provided from a transmission control unit (TCU), and after that, is controlled in a closed loop. This consequently excludes an excessive initial operation, which exceeds the target number of revolutions, from the electric oil pump, thereby increasing fuel efficiency by preventing unnecessary energy consumption, decreasing noise, and helping to improve the durability of the electric oil pump.
  • TCU transmission control unit
  • the predetermined reference temperature in the ultra-low temperature determination step S 20 is set in consideration of the effect that a change in the viscosity of oil in the transmission takes on the formation of oil pressure in response to the operation of the electric oil pump.
  • the reference temperature may be set in the range of at least ⁇ 10° C. or less.
  • the second open loop control step S 50 is performed to control the electric oil pump in an open loop up to the predetermined reference number of revolutions, and then the closed loop control step S 40 is performed after the second open loop control step S 50 .
  • the second open loop control step S 50 is the same as a control method of the related art in a common situation.
  • the reference number of revolutions in the second open loop control step S 50 is set in consideration of the responsibility of the electric oil pump based on the room temperature state, and is a number of revolutions that is higher than the target number of revolutions in the first open loop control step S 30 .
  • the target number of revolutions that is calculated and presented by the TCU at the first open loop control step S 30 is a number of revolutions that is of course smaller than the reference number of revolutions.
  • the relatively high target number of revolutions at the early stage of the startup of the electric oil pump is 300 RPM that is smaller than the reference number of revolutions 500 RPM. This conversely means that the reference number of revolutions is set to be greater than the target number of revolutions in the first open loop control step S 30 .
  • the open loop control can be performed in duty control mode in which only a duty value is provided to the motor of the electric oil pump, whereas the closed loop control can be performed in proportional integration (PI) control mode in which the target number of revolutions is followed by feeding back the number of revolutions of the electric oil pump.
  • PI proportional integration
  • PID proportional/integral/derivative control

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Control Of Transmission Device (AREA)
  • Hybrid Electric Vehicles (AREA)
US13/542,515 2011-12-09 2012-07-05 Method of controlling electric oil pump in hybrid vehicle Abandoned US20130149170A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020110131872A KR101724750B1 (ko) 2011-12-09 2011-12-09 하이브리드 차량의 전동식오일펌프 제어방법
KR10-2011-0131872 2011-12-09

Publications (1)

Publication Number Publication Date
US20130149170A1 true US20130149170A1 (en) 2013-06-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US13/542,515 Abandoned US20130149170A1 (en) 2011-12-09 2012-07-05 Method of controlling electric oil pump in hybrid vehicle

Country Status (5)

Country Link
US (1) US20130149170A1 (ko)
JP (1) JP2013122310A (ko)
KR (1) KR101724750B1 (ko)
CN (1) CN103161933B (ko)
DE (1) DE102012106917A1 (ko)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140129119A1 (en) * 2012-11-08 2014-05-08 Kia Motors Corporation Method and system for controlling warm-up of clutch fluid in hybrid electrical vehicle
US10436081B2 (en) * 2015-06-18 2019-10-08 Hyundai Motor Company Method for reducing noise of electric oil pump for vehicle
CN112583306A (zh) * 2019-09-30 2021-03-30 日本电产东测株式会社 马达驱动装置及电动油泵装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9168913B2 (en) * 2013-07-11 2015-10-27 Hyundai Motor Company Oil pump system of hybrid vehicle and method for controlling the same
KR101766017B1 (ko) * 2015-07-01 2017-08-08 현대자동차주식회사 Eop 로터 마모진단 방법
JP6288059B2 (ja) * 2015-12-09 2018-03-07 トヨタ自動車株式会社 車両用動力伝達装置
KR101806671B1 (ko) 2016-03-10 2017-12-08 현대자동차주식회사 하이브리드 차량의 라인압 제어방법
EP3540224B1 (en) * 2016-11-14 2021-05-12 TBK Co., Ltd. Electric pump apparatus
KR102602368B1 (ko) 2018-10-24 2023-11-17 현대자동차주식회사 차량 및 그 제어 방법
CN111441926A (zh) * 2019-01-17 2020-07-24 上海汽车集团股份有限公司 一种混动变速箱驱动电机冷却电动油泵系统及控制方法
JP7153628B2 (ja) * 2019-11-12 2022-10-14 本田技研工業株式会社 油圧制御装置
DE102019218010B4 (de) * 2019-11-22 2022-04-28 Zf Friedrichshafen Ag Verfahren und Steuergerät zum Betrieb einer Ölpumpe

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US6042501A (en) * 1997-09-01 2000-03-28 Nissan Motor Co., Ltd. Variable control device for a continuously variable transmission
US6454678B1 (en) * 1999-12-30 2002-09-24 Hyundai Motor Company Shift control method for automatic transmission
US6533702B1 (en) * 1999-11-22 2003-03-18 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Shift control system of hydraulic continuously variable transmission for vehicle
US6565473B2 (en) * 2001-01-17 2003-05-20 Toyota Jidosha Kabushiki Kaisha Hydraulic pressure control apparatus for automatic transmission of vehicle
US20110135499A1 (en) * 2009-12-04 2011-06-09 Hyundai Motor Company Apparatus and method for controlling operation of electric oil pump

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JP4136956B2 (ja) * 2004-01-27 2008-08-20 トヨタ自動車株式会社 センサレスブラシレスモータ式オイルポンプの制御装置
JP4312692B2 (ja) 2004-09-30 2009-08-12 ジヤトコ株式会社 自動変速機の油圧制御装置
JP4614811B2 (ja) * 2005-04-04 2011-01-19 トヨタ自動車株式会社 駆動装置およびこれを搭載する自動車並びに駆動装置の制御方法
JP4721801B2 (ja) * 2005-07-27 2011-07-13 東芝三菱電機産業システム株式会社 同期電動機の制御装置
JP4607833B2 (ja) * 2006-08-08 2011-01-05 ジヤトコ株式会社 ベルト式無段変速機における油圧制御装置
KR100946524B1 (ko) 2007-11-05 2010-03-11 현대자동차주식회사 하이브리드 차량의 전동식 오일펌프 구동 제어 방법
KR20110131872A (ko) 2010-06-01 2011-12-07 박태진 대중교통수단의 공석률을 낮추는 방법 및 제어시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6042501A (en) * 1997-09-01 2000-03-28 Nissan Motor Co., Ltd. Variable control device for a continuously variable transmission
US6533702B1 (en) * 1999-11-22 2003-03-18 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Shift control system of hydraulic continuously variable transmission for vehicle
US6454678B1 (en) * 1999-12-30 2002-09-24 Hyundai Motor Company Shift control method for automatic transmission
US6565473B2 (en) * 2001-01-17 2003-05-20 Toyota Jidosha Kabushiki Kaisha Hydraulic pressure control apparatus for automatic transmission of vehicle
US20110135499A1 (en) * 2009-12-04 2011-06-09 Hyundai Motor Company Apparatus and method for controlling operation of electric oil pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140129119A1 (en) * 2012-11-08 2014-05-08 Kia Motors Corporation Method and system for controlling warm-up of clutch fluid in hybrid electrical vehicle
US9593659B2 (en) * 2012-11-08 2017-03-14 Hyundai Motor Company Method and system for controlling warm-up of clutch fluid in hybrid electrical vehicle
US10436081B2 (en) * 2015-06-18 2019-10-08 Hyundai Motor Company Method for reducing noise of electric oil pump for vehicle
CN112583306A (zh) * 2019-09-30 2021-03-30 日本电产东测株式会社 马达驱动装置及电动油泵装置
US11705852B2 (en) 2019-09-30 2023-07-18 Nidec Tosok Corporation Motor driving device and electric oil pump device

Also Published As

Publication number Publication date
CN103161933A (zh) 2013-06-19
KR20130065147A (ko) 2013-06-19
KR101724750B1 (ko) 2017-04-10
JP2013122310A (ja) 2013-06-20
CN103161933B (zh) 2017-04-12
DE102012106917A9 (de) 2013-08-22
DE102012106917A1 (de) 2013-06-13

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AS Assignment

Owner name: KIA MOTORS CORPORATION, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SONG, SANG LOK;JEONG, SANG HYUN;LEE, HAK SUNG;AND OTHERS;REEL/FRAME:028537/0374

Effective date: 20120611

Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SONG, SANG LOK;JEONG, SANG HYUN;LEE, HAK SUNG;AND OTHERS;REEL/FRAME:028537/0374

Effective date: 20120611

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION