WO2011135680A1 - Electric water pump control device and electric water pump control method - Google Patents

Electric water pump control device and electric water pump control method Download PDF

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Publication number
WO2011135680A1
WO2011135680A1 PCT/JP2010/057497 JP2010057497W WO2011135680A1 WO 2011135680 A1 WO2011135680 A1 WO 2011135680A1 JP 2010057497 W JP2010057497 W JP 2010057497W WO 2011135680 A1 WO2011135680 A1 WO 2011135680A1
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WO
WIPO (PCT)
Prior art keywords
stop control
water pump
electric water
combustion engine
internal combustion
Prior art date
Application number
PCT/JP2010/057497
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French (fr)
Japanese (ja)
Inventor
竜太 寺谷
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トヨタ自動車株式会社
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Priority to PCT/JP2010/057497 priority Critical patent/WO2011135680A1/en
Publication of WO2011135680A1 publication Critical patent/WO2011135680A1/en

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    • 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
    • F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and 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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/20—Indicating devices; Other safety devices concerning atmospheric freezing conditions, e.g. automatically draining or heating during frosty weather
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature
    • 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
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting

Definitions

  • the present invention relates to an electric water pump control device and an electric water pump control method, and more particularly to suppression of control for stopping the operation of the electric water pump.
  • an electric water pump (hereinafter, “electric W / P”) that circulates cooling water in an internal combustion engine (engine) is mounted on the vehicle.
  • the electric W / P includes an electric motor, and the cooling water is circulated in the cooling water passage by driving the motor. By circulating the cooling water, freezing of the throttle included in the engine is prevented.
  • the electric W / P is supplied with electric power from a battery, and the rotation speed and the like are controlled by a control signal supplied from an ECU (Electronic Control Unit).
  • ECU Electronic Control Unit
  • Technology for performing electric W / P control in the ECU such as performing control to stop the electric W / P (hereinafter referred to as “stop control”) for promoting warm-up of the engine body and the head and saving power when starting the engine. It has been proposed (for example, Patent Document 1).
  • JP 2008-169750 A JP 2008-106707 A JP 2008-82219 A JP 2003-83181 A JP 7-119499 A
  • the throttle valve may freeze due to a decrease in the temperature of the throttle in a cold region or the like, and may not be able to operate.
  • An object of the present invention is to prevent freezing of an intake system in an internal combustion engine.
  • the electric water pump control device performs electric stop control for stopping the operation of the electric water pump that circulates cooling water in the internal combustion engine while satisfying a predetermined stop control condition when the internal combustion engine is started.
  • the acquisition means for acquiring data related to the factor that freezes the intake system in the internal combustion engine, and the value of the data acquired by the acquisition means satisfies a preset freezing condition for the factor
  • stop control prohibiting means for prohibiting the stop control by the electric water pump stop control means even if the stop control condition is satisfied.
  • the factor is at least one of an intake air temperature to the internal combustion engine by the intake system and a cooling water temperature in the internal combustion engine.
  • the electric water pump control device performs electric stop control for stopping the operation of the electric water pump that circulates cooling water in the internal combustion engine while satisfying a predetermined stop control condition when the internal combustion engine is started.
  • stop control prohibiting means for prohibiting the stop control.
  • An electric water pump control method performs stop control for stopping the operation of an electric water pump that circulates cooling water in an internal combustion engine while satisfying a predetermined stop control condition when the internal combustion engine is started.
  • the computer implements an acquisition step for acquiring data related to a factor that freezes an intake system in an internal combustion engine, and a value of the data acquired by the acquisition step satisfies a preset freezing condition for the factor, A stop control prohibiting step for prohibiting the stop control even if the stop control condition is satisfied.
  • freezing of the intake system in the internal combustion engine can be prevented.
  • FIG. 1 is a schematic configuration diagram of a cooling system in a vehicle to which an electric water pump control device according to the present invention is applied.
  • arrows shown by solid lines indicate the flow of cooling water
  • arrows shown by broken lines indicate signal input / output.
  • the cooling system in the present embodiment includes an engine (internal combustion engine) 1, a water temperature sensor 2, a throttle 3, a valve sensor 4, an intake air temperature sensor 5, a radiator 6, a thermostat 7, an electric water pump (electric W / P) 8, It has a cooling water passage 9 and an ECU 20 indicated by a solid line.
  • the cooling system in the present embodiment is a system for cooling engine 1 using cooling water and warming up engine 1 and the like using cooling water.
  • Engine 1 is a device that generates power by burning a mixture of supplied fuel and air.
  • the engine 1 is a prime mover such as a gasoline engine or a diesel engine, and transmits a signal representing information on a driving state to the ECU 20.
  • the water temperature sensor 2 detects the temperature of the cooling water flowing through the cooling water passage 9. The water temperature sensor 2 supplies a detection signal corresponding to the detected temperature to the ECU 20.
  • the throttle 3 is an intake system device that sends air to the engine 1, and adjusts the amount of air sent to the engine 1 by controlling the opening / closing amount of a valve (throttle valve) by a control signal supplied from the ECU 20.
  • the valve sensor 4 detects the opening / closing amount of the throttle valve and supplies a detection signal corresponding to the detected opening / closing amount to the ECU 20.
  • the intake air temperature sensor 5 detects the temperature of air sent from the throttle 3 to the engine 1.
  • the intake air temperature sensor 5 supplies a detection signal corresponding to the detected temperature to the ECU 20.
  • the radiator 6 cools the cooling water passing through the inside thereof with outside air. In this case, cooling of the cooling water in the radiator 6 is promoted by the wind introduced by the rotation of the electric fan (not shown).
  • the thermostat 7 has a valve that opens and closes according to the temperature of the cooling water. The thermostat 7 basically opens when the temperature of the cooling water reaches a high temperature, and passes through the radiator 6 so that the cooling water flows through the cooling water passage 9.
  • the electric W / P 8 includes an electric motor, and the cooling water is circulated in the cooling water passage 9 by driving the motor.
  • the electric W / P 8 is supplied with electric power from a battery (not shown), and the rotational speed and the like are controlled by a control signal supplied from the ECU 20.
  • the ECU 20 performs drive control of components included in the internal combustion engine such as the throttle 3 and the electric W / P8 based on various data represented by signals supplied from the various components described above.
  • the ECU 20 corresponds to the electric water pump control device according to the present invention, and performs stop control for stopping the electric W / P 8 while satisfying a predetermined stop control condition when starting the engine.
  • the predetermined stop control condition may be the same as that in the past.
  • control such as prohibiting the stop control described above is performed. .
  • the factors referred to here are the temperature of the cooling water, the temperature of the air sucked into the engine 1, and the like, and the throttle valve can be frozen due to the temperature decrease of these factors. Further, when the throttle valve freezes when the factor becomes lower than a predetermined temperature, the freezing condition related to the factor means that the factor (for example, the temperature of the cooling water) becomes lower than the predetermined temperature (for example, 0 degree). .
  • FIG. 2 is a hardware configuration diagram of the ECU 20 in the present embodiment.
  • the ECU 20 is realized by a computer, and is configured by connecting a CPU 11, a ROM 12, a RAM 13, a hard disk drive (HDD) 14, and a network controller 15 provided as communication means to an internal bus 16 as shown in FIG. Other configurations can be provided as necessary.
  • a CPU 11 a ROM 12, a RAM 13, a hard disk drive (HDD) 14, and a network controller 15 provided as communication means to an internal bus 16 as shown in FIG.
  • HDD hard disk drive
  • FIG. 3 is a block configuration diagram of the ECU 20 in the present embodiment. Note that functions unnecessary for the description of the present embodiment are omitted from the drawing.
  • the ECU 20 includes a data acquisition unit 21, a freezing determination unit 22, a throttle abnormality detection unit 23, an electric W / P drive control unit 24, and a control unit 25.
  • the data acquisition unit 21 acquires at least data related to a factor that freezes the throttle valve and information related to the state of the throttle 3 sent from other components 1, 2, 4, 5, and the like.
  • the freezing determination unit 22 determines whether or not the throttle valve is frozen or whether or not there is a possibility of freezing based on the acquired data.
  • the throttle abnormality detector 23 detects an abnormality of the throttle 3.
  • the electric W / P drive control unit 24 performs drive control of the electric W / P8. Specifically, stop control for stopping the operation of the electric W / P 8 is performed while a predetermined stop control condition is satisfied when the engine 1 is started in accordance with an instruction from the control unit 25. Further, stop control is prohibited in accordance with an instruction from the control unit 25. “Prohibited” means that stop control is stopped if stop control is being performed, and stop control is not newly started if stop control is not being performed.
  • the control unit 25 controls the entire process. Specifically, for example, it operates as a stop control prohibiting unit that prohibits stop control of the electric W / P 8.
  • Each component 21 to 25 in the ECU 20 is realized by a cooperative operation of a computer forming the ECU 20 and a program operating on the CPU 11 mounted on the computer.
  • the program used in this embodiment can be provided not only by communication means but also by storing it in a computer-readable recording medium such as a CD-ROM or DVD-ROM.
  • the program provided from the communication means or the recording medium is installed in the computer, and various processes are realized by the CPU of the computer sequentially executing the installation program.
  • the ECU 20 performs stop control for stopping the electric W / P 8 while satisfying predetermined stop control conditions for warming-up promotion and power saving of the engine body and the head when the engine 1 is started. Do. However, if the electric W / P 8 is stopped by executing the stop control, the cooling water that is not circulating in the cooling water passage 9 may freeze in a cold region, for example. When the water temperature is low, the engine heat received by the throttle 3 is low, that is, the temperature of the throttle 3 is also low. Further, when the intake air temperature to the engine 1 is low, the temperature of the throttle 3 also becomes low.
  • the data acquisition unit 21 uses the intake air temperature data and the cooling water temperature data. , Respectively, from the intake air temperature sensor 5 and the water temperature sensor 2 (step 101). Subsequently, the freezing determination unit 22 compares the acquired intake air temperature with a temperature A set in advance as a predetermined freezing condition.
  • the temperature A is set as a threshold value, for example, 0 degrees, which is a boundary between whether the throttle valve is frozen or not. As the temperature A, a value derived from an experiment may be used.
  • the freezing determination unit 22 determines that the throttle valve is frozen or may be frozen, and the determination The result is notified to the control unit 25.
  • the control unit 25 receives the determination result and instructs the electric W / P drive control unit 24 to prohibit the stop control.
  • the electric W / P drive control unit 24 stops the stop control if the stop control is being performed according to the prohibition instruction. That is, the electric W / P 8 is driven (step 105).
  • the detected intake air temperature is equal to or higher than temperature A (N in step 102)
  • the freezing determination unit 22 compares the acquired water temperature with a temperature B set in advance as a predetermined freezing condition.
  • This temperature B is set as a threshold value, for example, a temperature that becomes a boundary between whether or not the throttle valve is frozen.
  • a value derived from an experiment may be used.
  • the freezing determination unit 22 determines that the throttle valve is frozen or may be frozen, and the determination result To the control unit 25.
  • the control unit 25 receives the determination result and instructs the electric W / P drive control unit 24 to prohibit the stop control.
  • the electric W / P drive control unit 24 stops the stop control if the stop control is being performed according to the prohibition instruction. That is, the electric W / P 8 is driven (step 105). On the other hand, if the detected water temperature is equal to or higher than temperature B (N in step 102), it is determined that the throttle valve is not frozen, and the process proceeds to the next process.
  • step 104 the throttle abnormality detector 23 detects an abnormality of the throttle 3 as follows.
  • the ECU20 instructs the throttle 3 to open and close the throttle valve.
  • the throttle 3 opens and closes the throttle valve according to the instruction.
  • the valve sensor 4 detects the opening / closing amount (opening degree) of the throttle valve, it notifies the ECU 20.
  • the data acquisition unit 21 acquires the opening / closing amount data.
  • the throttle abnormality detection unit 23 compares the opening / closing amount instructed to the throttle 3 and the detected opening / closing amount to obtain a difference. If the throttle 3 is operating normally, the values to be compared theoretically coincide with each other, or an error within a given allowable range occurs. However, if the throttle valve is fixed due to freezing, the throttle valve cannot be opened and closed as instructed. Therefore, if the difference obtained by the comparison exceeds the allowable range, the throttle abnormality detection unit 23 determines that the throttle valve is fixed due to freezing. The throttle abnormality detector 23 detects an abnormality of the throttle 3 in this way.
  • the throttle abnormality detection unit 23 detects sticking due to freezing (Y in step 104)
  • the detection result is notified to the control unit 25.
  • the control unit 25 receives the detection result and instructs the electric W / P drive control unit 24 to prohibit the stop control.
  • the electric W / P drive control unit 24 stops the stop control if the stop control is being performed according to the prohibition instruction. That is, the electric W / P 8 is always driven (step 105).
  • the control unit 25 instructs the electric W / P drive control unit 24 to perform stop control when the predetermined stop control condition is satisfied (step 106). Thereby, the electric W / P drive control unit 24 continues the stop control being executed.
  • the throttle 3 may be frozen due to freezing due to a temperature drop, or the throttle 3 is already stuck due to freezing and is not operating normally. Is detected, the stop control is prohibited for the electric W / P8.
  • the control unit 25 may send an instruction to cancel the prohibition of the stop control to the electric W / P drive control unit 24 when the intake air temperature, the water temperature, etc. rise and the freezing of the throttle valve is resolved.
  • step 102, 103, 104 the determination of whether to prohibit the stop control (steps 102, 103, 104) is not necessarily limited to the order shown in FIG. 4, and may be performed in a desired order. These processes may be performed in any combination.
  • the coolant temperature and the intake air temperature to the engine 1 are taken up as factors for freezing the throttle valve. However, if there are other factors for freezing the throttle valve, the factors are similarly applied. Alternatively, data relating to the factor may be acquired and the presence or absence of freezing of the throttle valve may be inspected.
  • the throttle abnormality detection unit 23 detects the abnormality of the throttle 3 based on the difference between the instructed opening / closing amount and the detected opening / closing amount.
  • the abnormality may be determined as an abnormality from other factors. .
  • an abnormality in a communication line with the ECU 20 occurrence of a communication error
  • a sensor abnormality an abnormal value of detected intake air temperature or opening / closing amount
  • an insufficient blockage of a throttle valve due to contamination of impurities, etc. are caused by freezing. It may be determined that sticking has occurred.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

Disclosed is an electronic control unit (ECU) having an electric water pump drive control unit for stopping the operation of an electric water pump which circulates cooling water in an international combustion engine when the internal combustion engine is started, and predetermined stopping control conditions are satisfied; an acquisition means for acquiring data relating to a factor for freezing an air intake system in the internal combustion engine; and a stopping control prohibition means for prohibiting the stopping control performed by the electric water pump stopping control means when the value of the data acquired by the acquisition means satisfies the freezing conditions relating to the predetermined factor and even when the stopping control conditions are satisfied.

Description

電動ウォーターポンプ制御装置及び電動ウォーターポンプ制御方法Electric water pump control device and electric water pump control method
　本発明は、電動ウォーターポンプ制御装置及び電動ウォーターポンプ制御方法、特に電動ウォーターポンプの動作を停止させる制御の抑止に関する。 The present invention relates to an electric water pump control device and an electric water pump control method, and more particularly to suppression of control for stopping the operation of the electric water pump.
　車両には、内燃機関（エンジン）における冷却水を循環させる電動ウォーターポンプ（以下、「電動Ｗ／Ｐ」）が搭載されている車種が存在する。電動Ｗ／Ｐは、電動式のモータを備えており、このモータの駆動により冷却水を冷却水通路内で循環させる。冷却水を循環させることで、エンジンに含まれるスロットル等の凍結を防止している。電動Ｗ／Ｐは、バッテリから電力が供給され、ＥＣＵ（Ｅｌｅｃｔｒｏｎｉｃ　Ｃｏｎｔｒｏｌ　Ｕｎｉｔ）から供給される制御信号によって回転数等が制御される。エンジンの始動時にエンジン本体やヘッドなどの暖機促進及び省電力のために電動Ｗ／Ｐを停止させる制御（以下、「停止制御」）を行うなどのＥＣＵにおける電動Ｗ／Ｐ制御を行う技術が提案されている（例えば、特許文献１）。 There are vehicle types in which an electric water pump (hereinafter, “electric W / P”) that circulates cooling water in an internal combustion engine (engine) is mounted on the vehicle. The electric W / P includes an electric motor, and the cooling water is circulated in the cooling water passage by driving the motor. By circulating the cooling water, freezing of the throttle included in the engine is prevented. The electric W / P is supplied with electric power from a battery, and the rotation speed and the like are controlled by a control signal supplied from an ECU (Electronic Control Unit). Technology for performing electric W / P control in the ECU such as performing control to stop the electric W / P (hereinafter referred to as “stop control”) for promoting warm-up of the engine body and the head and saving power when starting the engine. It has been proposed (for example, Patent Document 1).
特開２００８－１６９７５０号公報JP 2008-169750 A 特開２００８－１０６７０７号公報JP 2008-106707 A 特開２００８－８２２１９号公報JP 2008-82219 A 特開２００３－８３１８１号公報JP 2003-83181 A 特開平７－１１９４９９号公報JP 7-119499 A
　しかしながら、電動Ｗ／Ｐをスロットルの置かれている状況を考慮せずに停止させてしまうと、寒冷地等ではスロットルの温度低下によりスロットルバルブが凍結して動作できなくなるおそれがあった。 However, if the electric W / P is stopped without considering the situation where the throttle is placed, the throttle valve may freeze due to a decrease in the temperature of the throttle in a cold region or the like, and may not be able to operate.
　本発明は、内燃機関における吸気系の凍結を防止することを目的とする。 An object of the present invention is to prevent freezing of an intake system in an internal combustion engine.
　本発明に係る電動ウォーターポンプ制御装置は、内燃機関の始動時に、所定の停止制御条件を満たしている間、内燃機関における冷却水を循環させる電動ウォーターポンプの動作を停止させる停止制御を行う電動ウォーターポンプ停止制御手段と、内燃機関における吸気系を凍結させる要因に関連するデータを取得する取得手段と、前記取得手段により取得されたデータの値が予め設定された当該要因に関する凍結条件を満たす場合に、前記停止制御条件を満たしていても前記電動ウォーターポンプ停止制御手段による前記停止制御を禁止させる停止制御禁止手段と、を有することを特徴とする。 The electric water pump control device according to the present invention performs electric stop control for stopping the operation of the electric water pump that circulates cooling water in the internal combustion engine while satisfying a predetermined stop control condition when the internal combustion engine is started. When the pump stop control means, the acquisition means for acquiring data related to the factor that freezes the intake system in the internal combustion engine, and the value of the data acquired by the acquisition means satisfies a preset freezing condition for the factor And stop control prohibiting means for prohibiting the stop control by the electric water pump stop control means even if the stop control condition is satisfied.
　また、前記要因は、前記吸気系による前記内燃機関への吸気温度又は前記内燃機関における冷却水の温度の少なくとも一方であることを特徴とする。 Further, the factor is at least one of an intake air temperature to the internal combustion engine by the intake system and a cooling water temperature in the internal combustion engine.
　本発明に係る電動ウォーターポンプ制御装置は、内燃機関の始動時に、所定の停止制御条件を満たしている間、内燃機関における冷却水を循環させる電動ウォーターポンプの動作を停止させる停止制御を行う電動ウォーターポンプ制御手段と、前記吸気系の異常を検出する検出手段と、前記検出手段により前記吸気系の異常が検出された場合に、前記停止制御条件を満たしていても前記電動ウォーターポンプ制御手段による前記停止制御を禁止させる停止制御禁止手段と、を有することを特徴とする。 The electric water pump control device according to the present invention performs electric stop control for stopping the operation of the electric water pump that circulates cooling water in the internal combustion engine while satisfying a predetermined stop control condition when the internal combustion engine is started. A pump control means; a detection means for detecting an abnormality in the intake system; and when the abnormality in the intake system is detected by the detection means, the electric water pump control means performs the operation even if the stop control condition is satisfied. And stop control prohibiting means for prohibiting the stop control.
　本発明に係る電動ウォーターポンプ制御方法は、内燃機関の始動時に、所定の停止制御条件を満たしている間、内燃機関における冷却水を循環させる電動ウォーターポンプの動作を停止させる停止制御を行うためのコンピュータにより実施され、内燃機関における吸気系を凍結させる要因に関連するデータを取得する取得ステップと、前記取得ステップにより取得されたデータの値が予め設定された当該要因に関する凍結条件を満たす場合に、前記停止制御条件を満たしていても前記停止制御を禁止させる停止制御禁止ステップと、を含むことを特徴とする。 An electric water pump control method according to the present invention performs stop control for stopping the operation of an electric water pump that circulates cooling water in an internal combustion engine while satisfying a predetermined stop control condition when the internal combustion engine is started. When the computer implements an acquisition step for acquiring data related to a factor that freezes an intake system in an internal combustion engine, and a value of the data acquired by the acquisition step satisfies a preset freezing condition for the factor, A stop control prohibiting step for prohibiting the stop control even if the stop control condition is satisfied.
　本発明によれば、内燃機関における吸気系の凍結を防止することができる。 According to the present invention, freezing of the intake system in the internal combustion engine can be prevented.
本実施の形態における冷却系システムの概略構成図である。It is a schematic block diagram of the cooling system in this Embodiment. 本実施の形態におけるＥＣＵのハードウェア構成図である。It is a hardware block diagram of ECU in this Embodiment. 本実施の形態におけるＥＣＵの機能ブロック構成図である。It is a functional block block diagram of ECU in this Embodiment. 本実施の形態における電動Ｗ／Ｐ停止制御の禁止処理を示したフローチャートである。It is the flowchart which showed the prohibition process of the electric W / P stop control in this Embodiment.
　以下、図面に基づいて、本発明の好適な実施の形態について説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
　図１は、本発明に係る電動ウォーターポンプ制御装置が適用された車両における冷却系システムの概略構成図である。なお、図１においては、実線で図示した矢印は冷却水の流れを示し、破線で図示した矢印は信号の入出力を示している。本実施の形態における冷却系システムは、エンジン（内燃機関）１、水温センサ２、スロットル３、バルブセンサ４、吸気温センサ５、ラジエータ６、サーモスタット７、電動ウォーターポンプ（電動Ｗ／Ｐ）８、実線で示された冷却水通路９及びＥＣＵ２０を有している。本実施の形態における冷却系システムは、冷却水を用いてエンジン１の冷却を行うと共に、冷却水を用いてエンジン１などの暖機を行うためのシステムである。 FIG. 1 is a schematic configuration diagram of a cooling system in a vehicle to which an electric water pump control device according to the present invention is applied. In FIG. 1, arrows shown by solid lines indicate the flow of cooling water, and arrows shown by broken lines indicate signal input / output. The cooling system in the present embodiment includes an engine (internal combustion engine) 1, a water temperature sensor 2, a throttle 3, a valve sensor 4, an intake air temperature sensor 5, a radiator 6, a thermostat 7, an electric water pump (electric W / P) 8, It has a cooling water passage 9 and an ECU 20 indicated by a solid line. The cooling system in the present embodiment is a system for cooling engine 1 using cooling water and warming up engine 1 and the like using cooling water.
　エンジン１は、供給される燃料と空気との混合気を燃焼させることによって動力を発生する装置である。エンジン１は、ガソリンエンジンやディーゼルエンジンなどの原動機であり、駆動状態に関する情報等を表す信号をＥＣＵ２０へ送信する。水温センサ２は、冷却水通路９を流れる冷却水の温度を検出する。水温センサ２は、検出した温度に対応する検出信号をＥＣＵ２０に供給する。スロットル３は、エンジン１へ空気を送る吸気系の装置であり、ＥＣＵ２０から供給される制御信号によって弁（スロットルバルブ）の開閉量を制御してエンジン１へ送る空気量を調整する。バルブセンサ４は、スロットルバルブの開閉量を検出し、その検出した開閉量に対応する検出信号をＥＣＵ２０に供給する。吸気温センサ５は、スロットル３がエンジン１へ送る空気の温度を検出する。吸気温センサ５は、検出した温度に対応する検出信号をＥＣＵ２０に供給する。ラジエータ６は、その内部を通過する冷却水を外気によって冷却する。この場合、電動ファン（図示せず）の回転により導入された風によって、ラジエータ６内の冷却水の冷却が促進される。サーモスタット７は、冷却水の温度に応じて開閉する弁を有している。サーモスタット７は、基本的には、冷却水の温度が高温となったときに開弁し、ラジエータ６を通過して冷却水が冷却水通路９を流れるようにする。これにより、冷却水が冷却され、エンジン１のオーバーヒートが抑制される。一方、冷却水の温度が相対的に低温であるときに閉弁し、冷却水がラジエータ６を通過しないようにする。これにより、冷却水の温度低下が抑制されるため、エンジン１のオーバークールが抑制される。電動Ｗ／Ｐ８は、電動式のモータを備えており、このモータの駆動により冷却水を冷却水通路９内で循環させる。電動Ｗ／Ｐ８は、図示しないバッテリから電力が供給され、ＥＣＵ２０から供給される制御信号によって回転数等が制御される。 Engine 1 is a device that generates power by burning a mixture of supplied fuel and air. The engine 1 is a prime mover such as a gasoline engine or a diesel engine, and transmits a signal representing information on a driving state to the ECU 20. The water temperature sensor 2 detects the temperature of the cooling water flowing through the cooling water passage 9. The water temperature sensor 2 supplies a detection signal corresponding to the detected temperature to the ECU 20. The throttle 3 is an intake system device that sends air to the engine 1, and adjusts the amount of air sent to the engine 1 by controlling the opening / closing amount of a valve (throttle valve) by a control signal supplied from the ECU 20. The valve sensor 4 detects the opening / closing amount of the throttle valve and supplies a detection signal corresponding to the detected opening / closing amount to the ECU 20. The intake air temperature sensor 5 detects the temperature of air sent from the throttle 3 to the engine 1. The intake air temperature sensor 5 supplies a detection signal corresponding to the detected temperature to the ECU 20. The radiator 6 cools the cooling water passing through the inside thereof with outside air. In this case, cooling of the cooling water in the radiator 6 is promoted by the wind introduced by the rotation of the electric fan (not shown). The thermostat 7 has a valve that opens and closes according to the temperature of the cooling water. The thermostat 7 basically opens when the temperature of the cooling water reaches a high temperature, and passes through the radiator 6 so that the cooling water flows through the cooling water passage 9. Thereby, a cooling water is cooled and the overheating of the engine 1 is suppressed. On the other hand, the valve is closed when the temperature of the cooling water is relatively low so that the cooling water does not pass through the radiator 6. Thereby, since the temperature fall of a cooling water is suppressed, the overcool of the engine 1 is suppressed. The electric W / P 8 includes an electric motor, and the cooling water is circulated in the cooling water passage 9 by driving the motor. The electric W / P 8 is supplied with electric power from a battery (not shown), and the rotational speed and the like are controlled by a control signal supplied from the ECU 20.
　ＥＣＵ２０は、前述した各種構成要素等から供給される信号により表される各種データ等に基づいてスロットル３や電動Ｗ／Ｐ８等内燃機関に含まれる構成要素の駆動制御を行う。ＥＣＵ２０は、本発明における電動ウォーターポンプ制御装置に相当し、エンジンの始動時に、所定の停止制御条件を満たしている間、電動Ｗ／Ｐ８を停止させる停止制御を行う。なお、所定の停止制御条件は、従来と同様でよい。また、各センサ２，５等から取得したスロットルバルブを凍結させる要因に関連するデータの値が予め設定された当該要因に関する凍結条件を満たす場合に、前述した停止制御を禁止させるなどの制御を行う。ここでいう要因というのは、冷却水の温度やエンジン１に吸入される空気の温度等であり、これらの要因の温度低下によりスロットルバルブは凍結しうる。また、当該要因が所定の温度より低くなるとスロットルバルブが凍結する場合、要因に関する凍結条件というのは、当該要因（例えば冷却水の温度）が所定の温度（例えば０度）より低くなることをいう。 The ECU 20 performs drive control of components included in the internal combustion engine such as the throttle 3 and the electric W / P8 based on various data represented by signals supplied from the various components described above. The ECU 20 corresponds to the electric water pump control device according to the present invention, and performs stop control for stopping the electric W / P 8 while satisfying a predetermined stop control condition when starting the engine. Note that the predetermined stop control condition may be the same as that in the past. Moreover, when the value of the data related to the factor that freezes the throttle valve acquired from each sensor 2, 5, etc. satisfies the preset freezing condition related to the factor, control such as prohibiting the stop control described above is performed. . The factors referred to here are the temperature of the cooling water, the temperature of the air sucked into the engine 1, and the like, and the throttle valve can be frozen due to the temperature decrease of these factors. Further, when the throttle valve freezes when the factor becomes lower than a predetermined temperature, the freezing condition related to the factor means that the factor (for example, the temperature of the cooling water) becomes lower than the predetermined temperature (for example, 0 degree). .
　図２は、本実施の形態におけるＥＣＵ２０のハードウェア構成図である。ＥＣＵ２０は、コンピュータにより実現され、図２に示したようにＣＰＵ１１、ＲＯＭ１２、ＲＡＭ１３、ハードディスクドライブ（ＨＤＤ）１４、通信手段として設けられたネットワークコントローラ１５を内部バス１６に接続して構成される。必要により、その他の構成も具備することは可能である。 FIG. 2 is a hardware configuration diagram of the ECU 20 in the present embodiment. The ECU 20 is realized by a computer, and is configured by connecting a CPU 11, a ROM 12, a RAM 13, a hard disk drive (HDD) 14, and a network controller 15 provided as communication means to an internal bus 16 as shown in FIG. Other configurations can be provided as necessary.
　図３は、本実施の形態におけるＥＣＵ２０のブロック構成図である。なお、本実施の形態の説明に不要な機能は図から省略している。ＥＣＵ２０は、データ取得部２１、凍結判定部２２、スロットル異常検出部２３、電動Ｗ／Ｐ駆動制御部２４及び制御部２５を有している。データ取得部２１は、他の構成要素１，２，４，５などから送られてくるスロットルバルブを凍結させる要因に関連するデータやスロットル３の状態に関連する情報を少なくとも取得する。凍結判定部２２は、取得されたデータに基づきスロットルバルブの凍結の有無、あるいは凍結の可能性の有無を判定する。スロットル異常検出部２３は、スロットル３の異常を検出する。電動Ｗ／Ｐ駆動制御部２４は、電動Ｗ／Ｐ８の駆動制御を行う。具体的には、制御部２５からの指示に従いエンジン１の始動時に所定の停止制御条件を満たしている間、電動Ｗ／Ｐ８の動作を停止させる停止制御を行う。また、制御部２５からの指示に従い停止制御を禁止する。「禁止」というのは、停止制御中であれば停止制御を中止し、停止制御中でなければ停止制御を新たに開始させない。制御部２５は、本処理の全体の制御を行う。具体的には、例えば、電動Ｗ／Ｐ８の停止制御を禁止させる停止制御禁止手段として動作する。 FIG. 3 is a block configuration diagram of the ECU 20 in the present embodiment. Note that functions unnecessary for the description of the present embodiment are omitted from the drawing. The ECU 20 includes a data acquisition unit 21, a freezing determination unit 22, a throttle abnormality detection unit 23, an electric W / P drive control unit 24, and a control unit 25. The data acquisition unit 21 acquires at least data related to a factor that freezes the throttle valve and information related to the state of the throttle 3 sent from other components 1, 2, 4, 5, and the like. The freezing determination unit 22 determines whether or not the throttle valve is frozen or whether or not there is a possibility of freezing based on the acquired data. The throttle abnormality detector 23 detects an abnormality of the throttle 3. The electric W / P drive control unit 24 performs drive control of the electric W / P8. Specifically, stop control for stopping the operation of the electric W / P 8 is performed while a predetermined stop control condition is satisfied when the engine 1 is started in accordance with an instruction from the control unit 25. Further, stop control is prohibited in accordance with an instruction from the control unit 25. “Prohibited” means that stop control is stopped if stop control is being performed, and stop control is not newly started if stop control is not being performed. The control unit 25 controls the entire process. Specifically, for example, it operates as a stop control prohibiting unit that prohibits stop control of the electric W / P 8.
　ＥＣＵ２０における各構成要素２１～２５は、ＥＣＵ２０を形成するコンピュータと、コンピュータに搭載されたＣＰＵ１１で動作するプログラムとの協調動作により実現される。 Each component 21 to 25 in the ECU 20 is realized by a cooperative operation of a computer forming the ECU 20 and a program operating on the CPU 11 mounted on the computer.
　また、本実施の形態で用いるプログラムは、通信手段により提供することはもちろん、ＣＤ－ＲＯＭやＤＶＤ－ＲＯＭ等のコンピュータ読み取り可能な記録媒体に格納して提供することも可能である。通信手段や記録媒体から提供されたプログラムはコンピュータにインストールされ、コンピュータのＣＰＵがインストールプログラムを順次実行することで各種処理が実現される。 Further, the program used in this embodiment can be provided not only by communication means but also by storing it in a computer-readable recording medium such as a CD-ROM or DVD-ROM. The program provided from the communication means or the recording medium is installed in the computer, and various processes are realized by the CPU of the computer sequentially executing the installation program.
　ところで、ＥＣＵ２０は、前述したようにエンジン１の始動時にエンジン本体やヘッドなどの暖機促進及び省電力のために所定の停止制御条件を満たしている間、電動Ｗ／Ｐ８を停止させる停止制御を行う。ただ、停止制御を実行することで電動Ｗ／Ｐ８を停止させていると、例えば寒冷地においては、冷却水通路９の中を循環していない冷却水が凍結してしまう可能性がある。水温が低いとスロットル３へのエンジン受熱が低く、つまりスロットル３の温度も低くなる。また、エンジン１への吸気温が低いとスロットル３の温度も低くなる。このような低水温、低吸気温の環境の中では、温度低下によりスロットルバルブが凍結してしまい、スロットル３が正常に動作できなくなる可能性があった。そこで、本実施の形態では、スロットルバルブが凍結した場合、凍結する可能性がある場合、あるいは温度低下が原因でスロットル３に何らかの異常が検出された場合には、所定の停止制御条件を満たしていることで停止制御が実行可能な状況であっても電動Ｗ／Ｐ駆動制御部２４による停止制御を禁止するようにした。 By the way, as described above, the ECU 20 performs stop control for stopping the electric W / P 8 while satisfying predetermined stop control conditions for warming-up promotion and power saving of the engine body and the head when the engine 1 is started. Do. However, if the electric W / P 8 is stopped by executing the stop control, the cooling water that is not circulating in the cooling water passage 9 may freeze in a cold region, for example. When the water temperature is low, the engine heat received by the throttle 3 is low, that is, the temperature of the throttle 3 is also low. Further, when the intake air temperature to the engine 1 is low, the temperature of the throttle 3 also becomes low. In such a low water temperature and low intake air temperature environment, there is a possibility that the throttle valve freezes due to a temperature drop and the throttle 3 cannot operate normally. Therefore, in this embodiment, when the throttle valve is frozen, when there is a possibility of freezing, or when some abnormality is detected in the throttle 3 due to a temperature drop, a predetermined stop control condition is satisfied. Therefore, the stop control by the electric W / P drive control unit 24 is prohibited even in a situation where the stop control can be executed.
　次に、本実施の形態において電動Ｗ／Ｐ８に対する停止制御を禁止する処理について図４に示したフローチャートを用いて説明する。 Next, processing for prohibiting stop control for the electric W / P 8 in the present embodiment will be described with reference to the flowchart shown in FIG.
　まず、データ取得部２１がスロットルバルブの凍結の要因となりうるエンジン１の吸気温及び冷却水の水温の温度低下を検査するために、データ取得部２１は、吸気温データ及び冷却水の水温データを、それぞれ吸気温センサ５及び水温センサ２から取得する（ステップ１０１）。続いて、凍結判定部２２は、取得された吸気温と所定の凍結条件として予め設定されている温度Ａとを比較する。この温度Ａには、スロットルバルブが凍結するかしないかの境目となる温度、例えば０度が閾値として設定されている。この温度Ａは、実験から導き出された値を用いてもよい。上記比較の結果、検出された吸気温が温度Ａより低ければ（ステップ１０２でＹ）、凍結判定部２２は、スロットルバルブが凍結している、あるいは凍結する可能性があると判定し、その判定結果を制御部２５に通知する。制御部２５は、その判定結果を受けて、電動Ｗ／Ｐ駆動制御部２４に停止制御の禁止を指示する。電動Ｗ／Ｐ駆動制御部２４は、この禁止の指示に応じて停止制御中であれば停止制御を中止する。つまり、電動Ｗ／Ｐ８を駆動させる（ステップ１０５）。一方、検出された吸気温が温度Ａ以上であれば（ステップ１０２でＮ）、スロットルバルブは凍結していないと判断し、次の処理へ移行する。 First, in order for the data acquisition unit 21 to check the temperature drop of the intake air temperature and cooling water temperature of the engine 1 that may cause the throttle valve to freeze, the data acquisition unit 21 uses the intake air temperature data and the cooling water temperature data. , Respectively, from the intake air temperature sensor 5 and the water temperature sensor 2 (step 101). Subsequently, the freezing determination unit 22 compares the acquired intake air temperature with a temperature A set in advance as a predetermined freezing condition. The temperature A is set as a threshold value, for example, 0 degrees, which is a boundary between whether the throttle valve is frozen or not. As the temperature A, a value derived from an experiment may be used. As a result of the comparison, if the detected intake air temperature is lower than the temperature A (Y in step 102), the freezing determination unit 22 determines that the throttle valve is frozen or may be frozen, and the determination The result is notified to the control unit 25. The control unit 25 receives the determination result and instructs the electric W / P drive control unit 24 to prohibit the stop control. The electric W / P drive control unit 24 stops the stop control if the stop control is being performed according to the prohibition instruction. That is, the electric W / P 8 is driven (step 105). On the other hand, if the detected intake air temperature is equal to or higher than temperature A (N in step 102), it is determined that the throttle valve is not frozen, and the process proceeds to the next process.
　続いて、凍結判定部２２は、取得された水温と所定の凍結条件として予め設定されている温度Ｂとを比較する。この温度Ｂには、スロットルバルブが凍結するかしないかの境目となる温度、例えば０度が閾値として設定されている。この温度Ｂは、実験から導き出された値を用いてもよい。上記比較の結果、検出された水温が温度Ｂより低ければ（ステップ１０３でＹ）、凍結判定部２２は、スロットルバルブが凍結している、あるいは凍結する可能性があると判定し、その判定結果を制御部２５に通知する。制御部２５は、その判定結果を受けて、電動Ｗ／Ｐ駆動制御部２４に停止制御の禁止を指示する。電動Ｗ／Ｐ駆動制御部２４は、この禁止の指示に応じて停止制御中であれば停止制御を中止する。つまり、電動Ｗ／Ｐ８を駆動させる（ステップ１０５）。一方、検出された水温が温度Ｂ以上であれば（ステップ１０２でＮ）、スロットルバルブは凍結していないと判断し、次の処理へ移行する。 Subsequently, the freezing determination unit 22 compares the acquired water temperature with a temperature B set in advance as a predetermined freezing condition. This temperature B is set as a threshold value, for example, a temperature that becomes a boundary between whether or not the throttle valve is frozen. As the temperature B, a value derived from an experiment may be used. As a result of the comparison, if the detected water temperature is lower than the temperature B (Y in step 103), the freezing determination unit 22 determines that the throttle valve is frozen or may be frozen, and the determination result To the control unit 25. The control unit 25 receives the determination result and instructs the electric W / P drive control unit 24 to prohibit the stop control. The electric W / P drive control unit 24 stops the stop control if the stop control is being performed according to the prohibition instruction. That is, the electric W / P 8 is driven (step 105). On the other hand, if the detected water temperature is equal to or higher than temperature B (N in step 102), it is determined that the throttle valve is not frozen, and the process proceeds to the next process.
　ステップ１０４において、スロットル異常検出部２３は、次のようにしてスロットル３の異常を検出する。 In step 104, the throttle abnormality detector 23 detects an abnormality of the throttle 3 as follows.
　ＥＣＵ２０は、スロットル３に対してスロットルバルブの開閉を指示する。これに応じて、スロットル３は、指示に従った量のスロットルバルブの開閉を行う。バルブセンサ４は、スロットルバルブの開閉量（開口度）を検出すると、ＥＣＵ２０へ通知する。データ取得部２１は、この開閉量データを取得する。スロットル異常検出部２３は、スロットル３に対して指示した開閉量と、検出された開閉量とを比較し差分をとる。スロットル３が正常に動作していれば、理論的には比較する値は一致するか、あるいは所与の許容範囲内の誤差が生じる程度である。しかしながら、スロットルバルブが凍結により固着していると、スロットルバルブは指示した程度に開閉できない。従って、スロットル異常検出部２３は、比較により得られた差分が許容範囲を超えていれば、スロットルバルブが凍結により固着していると判断する。スロットル異常検出部２３は、このようにしてスロットル３の異常を検出する。 ECU20 instructs the throttle 3 to open and close the throttle valve. In response to this, the throttle 3 opens and closes the throttle valve according to the instruction. When the valve sensor 4 detects the opening / closing amount (opening degree) of the throttle valve, it notifies the ECU 20. The data acquisition unit 21 acquires the opening / closing amount data. The throttle abnormality detection unit 23 compares the opening / closing amount instructed to the throttle 3 and the detected opening / closing amount to obtain a difference. If the throttle 3 is operating normally, the values to be compared theoretically coincide with each other, or an error within a given allowable range occurs. However, if the throttle valve is fixed due to freezing, the throttle valve cannot be opened and closed as instructed. Therefore, if the difference obtained by the comparison exceeds the allowable range, the throttle abnormality detection unit 23 determines that the throttle valve is fixed due to freezing. The throttle abnormality detector 23 detects an abnormality of the throttle 3 in this way.
　スロットル異常検出部２３が凍結による固着を検出すると（ステップ１０４でＹ）、その検出結果を制御部２５に通知する。制御部２５は、その検出結果を受けて、電動Ｗ／Ｐ駆動制御部２４に停止制御の禁止を指示する。電動Ｗ／Ｐ駆動制御部２４は、この禁止の指示に応じて停止制御中であれば停止制御を中止する。つまり、電動Ｗ／Ｐ８を常時駆動させる（ステップ１０５）。 When the throttle abnormality detection unit 23 detects sticking due to freezing (Y in step 104), the detection result is notified to the control unit 25. The control unit 25 receives the detection result and instructs the electric W / P drive control unit 24 to prohibit the stop control. The electric W / P drive control unit 24 stops the stop control if the stop control is being performed according to the prohibition instruction. That is, the electric W / P 8 is always driven (step 105).
　一方、凍結による固着を検出しなければ（ステップ１０４でＮ）、制御部２５は、所定の停止制御条件を満たしている場合、電動Ｗ／Ｐ駆動制御部２４に停止制御を指示する（ステップ１０６）。これにより、電動Ｗ／Ｐ駆動制御部２４は、実行中の停止制御を継続する。 On the other hand, if the fixation due to freezing is not detected (N in step 104), the control unit 25 instructs the electric W / P drive control unit 24 to perform stop control when the predetermined stop control condition is satisfied (step 106). ). Thereby, the electric W / P drive control unit 24 continues the stop control being executed.
　以上説明したように、本実施の形態によれば、温度低下が原因で凍結によりスロットル３が凍結する可能性がある場合、あるいはスロットル３が既に凍結により固着していて正常に動作していないことを検出した場合には、電動Ｗ／Ｐ８に対して停止制御を禁止するようにした。これにより、電動Ｗ／Ｐ８が駆動を開始すると、冷却水が循環を開始し、これによりスロットル３が凍結することを防止することができる。なお、制御部２５は、吸気温及び水温等が上昇してスロットルバルブの凍結が解消したときには、停止制御の禁止を解除する指示を電動Ｗ／Ｐ駆動制御部２４へ送るようにしてもよい。 As described above, according to the present embodiment, there is a possibility that the throttle 3 may be frozen due to freezing due to a temperature drop, or the throttle 3 is already stuck due to freezing and is not operating normally. Is detected, the stop control is prohibited for the electric W / P8. Thus, when the electric W / P 8 starts to drive, the cooling water starts to circulate, thereby preventing the throttle 3 from freezing. The control unit 25 may send an instruction to cancel the prohibition of the stop control to the electric W / P drive control unit 24 when the intake air temperature, the water temperature, etc. rise and the freezing of the throttle valve is resolved.
　なお、停止制御の禁止の是非の判断（ステップ１０２，１０３，１０４）は、図４に示した順番に限定する必要はなく、所望の順番で行ってもよい。また、これらの処理は、任意の組み合わせで行ってもよい。また、本実施の形態では、スロットルバルブを凍結させる要因として冷却水の水温とエンジン１への吸気温を取り上げたが、この他にスロットルバルブを凍結させる要因があれば、その要因についても同様に、当該要因に関連するデータを取得し、スロットルバルブの凍結の有無を検査するようにしてもよい。 It should be noted that the determination of whether to prohibit the stop control (steps 102, 103, 104) is not necessarily limited to the order shown in FIG. 4, and may be performed in a desired order. These processes may be performed in any combination. Further, in the present embodiment, the coolant temperature and the intake air temperature to the engine 1 are taken up as factors for freezing the throttle valve. However, if there are other factors for freezing the throttle valve, the factors are similarly applied. Alternatively, data relating to the factor may be acquired and the presence or absence of freezing of the throttle valve may be inspected.
　また、上記説明では、スロットル異常検出部２３は、指示した開閉量と検出された開閉量との差分によりスロットル３の異常を検出するようにしたが、他の要因から異常として判断してもよい。例えば、ＥＣＵ２０との間の通信線の異常（通信エラーの発生）、センサ異常（検出された吸気温や開閉量の異常値）、不純物の混入等によるスロットルバルブの不十分な閉塞等を凍結による固着の発生と判断してもよい。 In the above description, the throttle abnormality detection unit 23 detects the abnormality of the throttle 3 based on the difference between the instructed opening / closing amount and the detected opening / closing amount. However, the abnormality may be determined as an abnormality from other factors. . For example, an abnormality in a communication line with the ECU 20 (occurrence of a communication error), a sensor abnormality (an abnormal value of detected intake air temperature or opening / closing amount), an insufficient blockage of a throttle valve due to contamination of impurities, etc. are caused by freezing. It may be determined that sticking has occurred.
　１　内燃機関（エンジン）、２　水温センサ、３　スロットル、４　バルブセンサ、５　吸気温センサ、６　ラジエータ、７　サーモスタット、８　電動ウォーターポンプ（電動Ｗ／Ｐ）、９　冷却水通路、１１　ＣＰＵ、１２　ＲＯＭ、１３　ＲＡＭ、１４　ハードディスクドライブ（ＨＤＤ）、１５　ネットワークコントローラ、１６　内部バス、２０　ＥＣＵ、２１　データ取得部、２２　凍結判定部、２３　スロットル異常検出部、２４　電動Ｗ／Ｐ駆動制御部、２５　制御部。 1. Internal combustion engine (engine), 2. Water temperature sensor, 3. Throttle, 4. Valve sensor, 5. Intake temperature sensor, 6. Radiator, 7. Thermostat, 8. Electric water pump (electric W / P), 9. Cooling water passage, 11. CPU, 12. ROM. , 13 RAM, 14 hard disk drive (HDD), 15 network controller, 16 internal bus, 20 ECU, 21 data acquisition unit, 22 freeze determination unit, 23 throttle abnormality detection unit, 24 electric W / P drive control unit, 25 control unit .

Claims (4)

  1. 　内燃機関の始動時に、所定の停止制御条件を満たしている間、内燃機関における冷却水を循環させる電動ウォーターポンプの動作を停止させる停止制御を行う電動ウォーターポンプ停止制御手段と、
    　内燃機関における吸気系を凍結させる要因に関連するデータを取得する取得手段と、
    　前記取得手段により取得されたデータの値が予め設定された当該要因に関する凍結条件を満たす場合に、前記停止制御条件を満たしていても前記電動ウォーターポンプ停止制御手段による前記停止制御を禁止させる停止制御禁止手段と、
    　を有することを特徴とする電動ウォーターポンプ制御装置。     An electric water pump stop control means for performing stop control to stop the operation of the electric water pump for circulating the cooling water in the internal combustion engine while satisfying a predetermined stop control condition when starting the internal combustion engine;
    Acquisition means for acquiring data related to a factor that freezes an intake system in an internal combustion engine;
    Stop control for prohibiting the stop control by the electric water pump stop control means even if the stop control condition is satisfied when the value of the data acquired by the acquisition means satisfies a preset freezing condition regarding the factor Prohibited means,
    An electric water pump control device comprising:
  2. 　請求項１記載の電動ウォーターポンプ制御装置において、
    　前記要因は、前記吸気系による前記内燃機関への吸気温度又は前記内燃機関における冷却水の温度の少なくとも一方であることを特徴とする電動ウォーターポンプ制御装置。     In the electric water pump control device according to claim 1,
    The electric water pump control device according to claim 1, wherein the factor is at least one of an intake air temperature to the internal combustion engine by the intake system and a cooling water temperature in the internal combustion engine.
  3. 　内燃機関の始動時に、所定の停止制御条件を満たしている間、内燃機関における冷却水を循環させる電動ウォーターポンプの動作を停止させる停止制御を行う電動ウォーターポンプ制御手段と、
    　前記吸気系の異常を検出する検出手段と、
    　前記検出手段により前記吸気系の異常が検出された場合に、前記停止制御条件を満たしていても前記電動ウォーターポンプ制御手段による前記停止制御を禁止させる停止制御禁止手段と、
    　を有することを特徴とする電動ウォーターポンプ制御装置。     An electric water pump control means for performing stop control for stopping the operation of the electric water pump for circulating cooling water in the internal combustion engine while satisfying a predetermined stop control condition at the time of starting the internal combustion engine;
    Detecting means for detecting an abnormality in the intake system;
    A stop control prohibiting means for prohibiting the stop control by the electric water pump control means even when the stop control condition is satisfied when an abnormality of the intake system is detected by the detecting means;
    An electric water pump control device comprising:
  4. 　内燃機関の始動時に、所定の停止制御条件を満たしている間、内燃機関における冷却水を循環させる電動ウォーターポンプの動作を停止させる停止制御を行うためのコンピュータにより実施され、
    　内燃機関における吸気系を凍結させる要因に関連するデータを取得する取得ステップと、
    　前記取得ステップにより取得されたデータの値が予め設定された当該要因に関する凍結条件を満たす場合に、前記停止制御条件を満たしていても前記停止制御を禁止させる停止制御禁止ステップと、
    　を含むことを特徴とする電動ウォーターポンプ制御方法。
          When the internal combustion engine is started, it is implemented by a computer for performing stop control for stopping the operation of the electric water pump that circulates the cooling water in the internal combustion engine while satisfying a predetermined stop control condition.
    An acquisition step of acquiring data related to a factor that freezes an intake system in an internal combustion engine;
    A stop control prohibiting step for prohibiting the stop control even when the stop control condition is satisfied, when the value of the data acquired by the acquiring step satisfies a preset freezing condition for the factor;
    An electric water pump control method comprising:
PCT/JP2010/057497 2010-04-27 2010-04-27 Electric water pump control device and electric water pump control method WO2011135680A1 (en)

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JP2006132449A (en) * 2004-11-05 2006-05-25 Toyota Motor Corp Throttle control device
JP2008169750A (en) * 2007-01-11 2008-07-24 Toyota Motor Corp Control device for electric water pump
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