US20160102598A1 - Method and system for controlling electric water pump - Google Patents

Method and system for controlling electric water pump Download PDF

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Publication number
US20160102598A1
US20160102598A1 US14/726,434 US201514726434A US2016102598A1 US 20160102598 A1 US20160102598 A1 US 20160102598A1 US 201514726434 A US201514726434 A US 201514726434A US 2016102598 A1 US2016102598 A1 US 2016102598A1
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US
United States
Prior art keywords
ewp
controller
signal
power
ecu
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
US14/726,434
Other languages
English (en)
Inventor
Jae Man Cho
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: CHO, JAE MAN
Publication of US20160102598A1 publication Critical patent/US20160102598A1/en
Abandoned 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • 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
    • F01P5/14—Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
    • 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
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
    • 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
    • F01P2050/00—Applications
    • F01P2050/24—Hybrid vehicles

Definitions

  • the present invention relates to a method and system for controlling an electric water pump (EWP), and more particularly, to a method and system for controlling an electric water pump that may be effectively controlled by separating a control signal for operation of the electric water pump from a power signal and by using a digital signal outputted from an engine electronic control unit (ECU).
  • EWP electric water pump
  • ECU engine electronic control unit
  • an EWP is a pump that is independently operated or driven by a motor without depending on power of an engine, while a mechanical water pump depends on power of an engine.
  • the EWP Since the EWP is independently controlled to supply a coolant flow rate suitable for a driving condition of an engine or a vehicle regardless of operation of the engine, the EWP has the following merits.
  • the engine can be rapidly warmed.
  • a ratio of power of the EWP to power of a mechanical water pump may be about 60-70%.
  • a cooling system of a vehicle may be compacted.
  • the EWP since the EWP is controlled through only ignition (IG) power and a controller area network (CAN) signal outputted from an ECU, the EWP operates only in a limp-home mode when the CAN signal is unstable.
  • IG ignition
  • CAN controller area network
  • the EWP when the EWP operates abnormally, the EWP may not be effectively used.
  • Patent Document 1 Patent Laid-Open Publication No. KR 10-2008-0035263 (Apr. 23, 2008)
  • Patent Document 2 Patent Laid-Open Publication No. KR 10-2012-0140412 (Dec. 31, 2012)
  • the present disclosure has been made in an effort to provide a method and system for controlling an EWP that may effectively perform fail-safe control and driving control for the EWP by separating a control signal for operation of the EWP from a power signal and by using a digital signal outputted from an ECU.
  • an exemplary embodiment of the present invention provides a method of controlling an EWP through an EWP controller configured to communicate with an ECU on a controller area network (CAN).
  • the method may include: receiving a CAN signal from the ECU to control the EWP through the CAN; receiving a fail-safe digital signal (FSDS) that is related to a fail-safe control function of an engine or the EWP from the ECU; and controlling the EWP based on the CAN signal and the fail-safe digital signal.
  • FSDS fail-safe digital signal
  • the EWP may include an auxiliary EWP which cools a heater, a turbocharger, and an inverter.
  • the method may further include detecting battery power that is supplied to the EWP by a battery or ignition (IG) power that is supplied to the EWP by an IG power portion.
  • IG ignition
  • the method may further include receiving a rotation speed command for the EWP from the ECU through the CAN.
  • the EWP when the IG power is turned on and the CAN signal is normal, the EWP may be controlled based on commands from the ECU.
  • the EWP when the IG power is turned on and the FSDS is normally inputted to the EWP controller while the CAN signal is not inputted to the EWP controller, the EWP may be controlled in the limp-home mode.
  • the EWP when the IG power is turned on and the FSDS is not normally inputted to the EWP controller while the CAN signal is not inputted to the EWP controller, the EWP may be controlled in the wake-up mode.
  • the EWP when the IG power is turned off and the CAN signal is normally inputted to the EWP controller, the EWP may be controlled based on commands from the ECU, and when the IG power is turned off and the CAN signal is not normally inputted to the EWP controller, the EWP may be set to enter a sleep mode.
  • the sleep mode when the EWP is set to enter the sleep mode from the normal mode, the sleep mode may be performed after a predetermined time has passed.
  • Another embodiment of the present invention provides a system for controlling an EWP, including: an ECU configured to control an engine; an EWP configured to cool the engine; a battery configured to supply the EWP with battery power (B+); an ignition power portion configured to supply the EWP with ignition (IG) power.
  • An EWP controller is configured to communicate with the ECU on a controller area network (CAN), receive a CAN signal from the ECU to control the EWP through the CAN, receive a fail-safe digital signal (FSDS) from the ECU, and control the EWP based on the CAN signal and the FSDS.
  • CAN controller area network
  • FSDS fail-safe digital signal
  • the EWP may include an auxiliary EWP which cools a heater, a turbocharger, and an inverter.
  • the EWP controller may be further configured to detect the battery power that is supplied to the EWP by the battery or the IG power supplied by the IG power portion.
  • the EWP controller may be further configured to receive a rotation speed command for the EWP from the ECU through the CAN.
  • Another embodiment provides a computer readable storage medium containing a computer program configured to cause an EWP controller to control an electric water pump (EWP) by the following method when read and processed by a computer system: receiving a controller area network (CAN) signal from an engine electronic control unit (ECU) to control the EWP through a controller area network (CAN); receiving a fail-safe digital signal (FSDS) that is related to a fail-safe control function of an engine or the EWP from the ECU; and controlling the EWP based on the CAN signal and the fail-safe digital signal.
  • CAN controller area network
  • FSDS fail-safe digital signal
  • the method and system for controlling an EWP can be provided to effectively control the EWP by separating a control signal for the EWP from a power signal and by using a digital signal outputted from the ECU.
  • FIG. 1 is a block diagram of a system for controlling the EWP according to an exemplary embodiment of the present invention.
  • FIG. 2 is a flowchart of a method of controlling the EWP according to an exemplary embodiment of the present invention.
  • FIG. 3 is a condition table related to control modes of the EWP according to an exemplary embodiment of the present invention.
  • FIG. 1 is a block diagram of a system for controlling the EWP according to an exemplary embodiment of the present invention.
  • the system for controlling the EWP may control the EWP by separating a control signal for operation of the EWP from a power signal, and by using a digital signal outputted from the ECU.
  • a system for controlling the EWP includes: an ECU 100 configured to control an engine 1 ; an EWP 30 configured to cool the engine 1 ; a battery 10 configured to supply the EWP 30 with battery power (B+); an ignition power portion 20 configured to supply the EWP 30 with ignition (IG) power; and an EWP controller 200 configured to communicate with the ECU 100 on a controller area network
  • the EWP controller may be configured to receive a CAN signal from the ECU to control the EWP through the CAN, receive a fail-safe digital signal (FSDS) from the ECU, and control the EWP based on the CAN signal and the FSDS.
  • the EWP controller is further configured to perform a normal mode, a limp-home mode, a sleep mode, and a wake-up mode, to receive a fail-safe digital signal (FSDS) from the ECU 100 , and to perform fail-safe control and driving control for the EWP 30 .
  • the EWP controller may also perform other control functions of the EWP.
  • the EWP 30 may include an auxiliary EWP (not shown) which cools a heater, a turbocharger, and an inverter.
  • the battery power and the ignition (IG) power may be directly supplied to the EWP 30 from the battery 10 and the IG power portion 20 as powers for driving the EWP 30 .
  • the battery power and the ignition (IG) power are supplied to the EWP controller 200 , and the EWP controller 200 detects the powers that are supplied to the EWP 30 from the battery 10 and the IG power portion 20 .
  • the EWP controller 200 may receive a command such as a rotation speed command for the EWP 30 , and various kinds of commands through the CAN from the ECU 100 .
  • the engine 1 , the battery 10 , the IG power portion 20 , and the EWP 30 may be those typically applied in the related art, so the detailed descriptions thereof will be omitted in the present specification.
  • the EWP controller 200 may include one or more processors or microprocessors, and/or hardware operated by a predetermined program including a series of commands for executing a method of controlling the EWP according to an exemplary embodiment of the present invention, which will be described below.
  • FIG. 2 is a flowchart of the method of controlling the EWP according to an exemplary embodiment of the present invention
  • FIG. 3 is a drawing showing a condition table related to control modes of the EWP according to the exemplary embodiment of the present invention.
  • the EWP controller 200 determines whether the IG power is turned on, communication on the CAN is normal, and the FSDS signal is inputted to the EWP controller 200 .
  • the EWP controller 200 when the IG power is turned on (S 110 ) and the CAN signal is normal (S 120 ), since the EWP controller 200 may control the EWP 30 regardless of the FSDS signal (S 130 ), the EWP controller 200 normally controls the EWP 30 based on commands for operation of the EWP 30 outputted from the ECU 100 (S 210 ).
  • the EWP controller 200 controls the EWP 30 in the limp-home mode (S 220 ). In other words, in this case, even though the EWP 30 can be operated, since no normal control signal exists due to an interruption of the CAN signal, the limp-home mode is performed.
  • the EWP controller 200 controls the EWP 30 in the wake-up mode (S 230 ).
  • the EWP controller 200 controls the EWP 30 in the normal mode based on the commands from the ECU 100 (S 240 ).
  • the EWP controller 200 controls the EWP 30 in the sleep mode (S 250 ).
  • the EWP controller 200 when an operation of the EWP 30 enters the sleep mode from the normal mode, the EWP controller 200 performs the sleep mode after a predetermined time (e.g., about 15 seconds) is passed. This is to prevent a problem of a hot spot occurring due to stoppage of coolant flow in a cooling circuit of the vehicle when the EWP 30 is suddenly stopped, thereby causing a high temperature at the hot spot.
  • the EWP controller 200 may control the EWP 30 in the sleep mode after further operating the EWP 30 during the predetermined time (e.g., about 15 seconds).
  • the predetermined time may be previously set and programmed, which is apparent to those skilled in the art.
  • the EWP may be effectively controlled by separating the control signal for operation of the EWP from the power signal and by using the digital signal outputted from the ECU.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Supercharger (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
US14/726,434 2014-10-08 2015-05-29 Method and system for controlling electric water pump Abandoned US20160102598A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020140136124A KR101619277B1 (ko) 2014-10-08 2014-10-08 전동식 워터펌프 제어 방법 및 시스템
KR10-2014-0136124 2014-10-08

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US20160102598A1 true US20160102598A1 (en) 2016-04-14

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US14/726,434 Abandoned US20160102598A1 (en) 2014-10-08 2015-05-29 Method and system for controlling electric water pump

Country Status (3)

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US (1) US20160102598A1 (ko)
KR (1) KR101619277B1 (ko)
CN (1) CN106194387B (ko)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111664081B (zh) * 2020-06-01 2022-08-19 长沙市健科电子有限公司 冷却水泵的控制方法和装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502446A (en) * 1981-12-10 1985-03-05 Nissan Motor Company, Limited Fail-safe system for automotive engine control system for fail-safe operation as crank angle sensor fails operation thereof and fail-safe method therefor, and detection of fault in crank angle sensor
US4556029A (en) * 1982-04-02 1985-12-03 Nissan Motor Company, Limited Back-up system and method for engine coolant temperature sensor in electronic engine control system
US4977743A (en) * 1987-12-28 1990-12-18 Honda Giken Kogyo Kabushiki Kaisha Cooling control system for internal combustion engines equipped with superchargers
US4977862A (en) * 1987-12-28 1990-12-18 Honda Giken Kogyo Kabushiki Kaisha Engine room-cooling control system
US6601545B1 (en) * 1999-11-11 2003-08-05 Robert Bosch Gmbh Method and device for transporting heat energy that is produced in a motor vehicle
US20110246007A1 (en) * 2010-03-30 2011-10-06 Hyundai Motor Company Apparatus for controlling electric water pump of hybrid vehicle and method thereof
US20110265742A1 (en) * 2010-04-29 2011-11-03 Kia Motors Corporation Apparatus for controlling water pump of hybrid vehicle and method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101330323B1 (ko) * 2011-05-31 2013-11-14 (주)모토닉 엔진냉각용 워터펌프 구동장치
KR101305770B1 (ko) * 2011-09-21 2013-09-06 현대자동차주식회사 차량용 전동식워터펌프 제어시스템 및 이의 제어방법

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502446A (en) * 1981-12-10 1985-03-05 Nissan Motor Company, Limited Fail-safe system for automotive engine control system for fail-safe operation as crank angle sensor fails operation thereof and fail-safe method therefor, and detection of fault in crank angle sensor
US4556029A (en) * 1982-04-02 1985-12-03 Nissan Motor Company, Limited Back-up system and method for engine coolant temperature sensor in electronic engine control system
US4977743A (en) * 1987-12-28 1990-12-18 Honda Giken Kogyo Kabushiki Kaisha Cooling control system for internal combustion engines equipped with superchargers
US4977862A (en) * 1987-12-28 1990-12-18 Honda Giken Kogyo Kabushiki Kaisha Engine room-cooling control system
US6601545B1 (en) * 1999-11-11 2003-08-05 Robert Bosch Gmbh Method and device for transporting heat energy that is produced in a motor vehicle
US20110246007A1 (en) * 2010-03-30 2011-10-06 Hyundai Motor Company Apparatus for controlling electric water pump of hybrid vehicle and method thereof
US20110265742A1 (en) * 2010-04-29 2011-11-03 Kia Motors Corporation Apparatus for controlling water pump of hybrid vehicle and method thereof

Also Published As

Publication number Publication date
KR20160041685A (ko) 2016-04-18
CN106194387B (zh) 2020-08-04
CN106194387A (zh) 2016-12-07
KR101619277B1 (ko) 2016-05-10

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Owner name: KIA MOTORS CORPORATION, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHO, JAE MAN;REEL/FRAME:035749/0861

Effective date: 20150405

Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHO, JAE MAN;REEL/FRAME:035749/0861

Effective date: 20150405

STCB Information on status: application discontinuation

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