US20140230783A1 - Control apparatus for internal combustion engine - Google Patents

Control apparatus for internal combustion engine Download PDF

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Publication number
US20140230783A1
US20140230783A1 US14/350,717 US201114350717A US2014230783A1 US 20140230783 A1 US20140230783 A1 US 20140230783A1 US 201114350717 A US201114350717 A US 201114350717A US 2014230783 A1 US2014230783 A1 US 2014230783A1
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United States
Prior art keywords
internal combustion
catalyst
combustion engine
idling stop
control apparatus
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
US14/350,717
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English (en)
Inventor
Hiroyuki Sugihara
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA reassignment TOYOTA JIDOSHA KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SUGIHARA, HIROYUKI
Publication of US20140230783A1 publication Critical patent/US20140230783A1/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
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D23/00—Controlling engines characterised by their being supercharged
    • F02D23/02—Controlling engines characterised by their being supercharged the engines being of fuel-injection type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F02N11/0829—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to special engine control, e.g. giving priority to engine warming-up or learning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to a control apparatus for an internal combustion engine disposed in a vehicle such as, for example, an automobile.
  • a control apparatus for an engine disposed in a hybrid vehicle wherein the control apparatus is configured to stop the engine under the condition that an engine stop condition applies and that temperature of a purifying apparatus is less than or equal to a threshold value, and to continue the operation of the engine in ignition timing after engine start set in advance under the condition that the engine stop condition applies and that the temperature of the purifying apparatus is greater than the threshold value (refer to Patent document 1).
  • an apparatus which is configured to perform idling due to compressed self-ignition in which exhaust temperature is low when catalyst temperature is greater than or equal to a predetermined temperature set on the basis of oil water temperature and ambient temperature or the like and which is configured to automatically stop the idling when the catalyst temperature is less than the predetermined temperature, in a case where an automatic stop condition for the idling applies (refer to Patent document 3).
  • Patent document 1 Japanese Patent Application Laid Open No. 2007-309113
  • Patent document 2 Japanese Patent Application Laid Open No. 2003-239782
  • Patent document 3 Japanese Patent Application Laid Open No. 2002-188484
  • control apparatus for an internal combustion engine equipped with an idling stop mechanism and a supercharger
  • said control apparatus is provided with a controlling device which is configured to detect atmospheric pressure and to change a threshold value of a parameter which allows idling stop processing to be performed by the idling stop mechanism, to a side on which the idling stop processing is not allowed, as the detected atmospheric pressure has a lower value.
  • the control apparatus controls the internal combustion engine equipped with the idling stop mechanism and the supercharger.
  • the “idling stop mechanism” is a mechanism which stops the internal combustion engine by detecting the stop of a vehicle and which restarts the internal combustion engine by detecting a start operation of the vehicle. Since various known aspects can be applied to the idling stop mechanism, the explanation of the details of the idling stop mechanism is omitted.
  • the controlling device which is provided, for example, with a memory, a processor or the like detects the atmospheric pressure and changes the threshold value of the parameter which allows the idling stop processing to be performed by the idling stop mechanism, to the side on which the idling stop processing is not allowed, as the detected atmospheric pressure has a lower value.
  • catalyst warming-up control is performed during a cold period on a catalyst disposed in an exhaust passage of the internal combustion engine, in order to appropriately purify exhaust gas
  • the catalyst warming-up control such as, for example, supplying a relatively high-temperature exhaust gas to the catalyst is performed, relatively frequently.
  • the catalyst warming-up control is performed during the travelling of the vehicle.
  • the threshold value of the parameter which allows the idling stop processing to be performed is changed by the controlling device to the side on which the idling stop processing is not allowed, as the detected atmospheric pressure has a lower value.
  • the parameter is temperature of a catalyst disposed in an exhaust passage of the internal combustion engine equipped with the supercharger.
  • the excessive increase in catalyst temperature can be preferably suppressed.
  • FIG. 1 is a block diagram illustrating a configuration of a vehicle in an embodiment.
  • FIG. 2 is one example of a map illustrating a relation between the atmospheric pressure and catalyst bed temperature at which engine stop is executed.
  • FIG. 3 is a flowchart illustrating engine stop determination processing performed by an ECU in the embodiment.
  • FIG. 1 is a block diagram illustrating the configuration of the vehicle in the embodiment.
  • an internal combustion engine 10 is disposed in a vehicle 1 such as, for example, an automobile.
  • the internal combustion engine 10 is provided with a main body 11 having a plurality of cylinders, an intake passage 12 and an exhaust passage 13 each of which is connected to the main body 11 , a turbocharger having a compressor 14 c disposed in the intake passage 12 and a turbine 14 t , a valve 15 which is disposed in the exhaust passage 13 and which is configured to adjust an air amount (i.e.
  • an intake amount) of an air which flows into the intake passage 12 a catalyst 16 disposed in the exhaust passage 13 , a valve 17 which is disposed in the exhaust passage 13 and which is configured to adjust exhaust gas distribution to the turbocharger 14 , and an injector 18 which is configured to adjust a fuel amount of fuel which is supplied to each of the plurality of cylinders.
  • the intake passage 12 of the internal combustion engine 10 is provided with a sensor 21 which is configured to measure the intake amount.
  • the exhaust passage 13 of the internal combustion engine 10 is provided with a sensor 22 which is configured to measure an air/fuel ratio, a sensor 23 which is configured to measure temperature of an exhaust gas which has passed through the turbocharger 14 , a sensor 24 which is configured to measure temperature of an exhaust gas which has not passed through the turbocharger 14 , and a sensor 25 which is configured to detect catalyst bed temperature of the catalyst 16 .
  • An electronic control unit (ECU) 30 of the vehicle 1 controls the injector 18 and the various valves 15 and 17 in accordance with signals outputted from the various sensors 21 , 22 , 23 , 24 and 25 .
  • the ECU 30 controls a switch SW for changing a driving mode such as, for example, “an urban area mode (in which the number of revolutions and the load of the internal combustion engine 10 are relatively low: low revolution low load)” and “a high speed mode (in which the number of revolutions and the load of the internal combustion engine 10 are relatively high: high revolution high load)” depending on a state of the vehicle 1 .
  • the ECU 30 stops the internal combustion engine 10 by detecting the stop of the vehicle 1 , and restarts the internal combustion engine 10 by detecting a start operation of the vehicle 1 (e.g. a state in which the amount of stepping on a brake pedal, or other states).
  • the ECU 30 is configured to perform idling stop processing.
  • the “turbocharger 14 ” and the “ECU 30 ” in the embodiment are one example of the “supercharger” and the “idling stop mechanism” of the present invention, respectively.
  • a control apparatus 100 in the embodiment is provided with the ECU 30 as one example of the “controlling device” of the present invention, wherein the ECU 30 detects the atmospheric pressure and changes a threshold value of a parameter which allows the idling stop processing to be performed, to a side on which the idling stop processing is not allowed, as the detected atmospheric pressure has a lower value.
  • the ECU 30 detects the atmospheric pressure and changes a threshold value of a parameter which allows the idling stop processing to be performed, to a side on which the idling stop processing is not allowed, as the detected atmospheric pressure has a lower value.
  • one portion of various functions of the ECU 30 for electronic control of the vehicle 1 is used as at least one portion of the control apparatus 100 .
  • the ECU 30 changes the threshold value of the parameter which allows the idling stop processing to be performed (or “T h — on ” which is a threshold value of the catalyst bed temperature), by using the following equations (1) to (3).
  • the “flatland” in the embodiment means an area in which the atmospheric pressure is about 1 atm.
  • the “highland” in the embodiment means an area in which the atmospheric pressure is to the extent that the amount of an intake air to the internal combustion engine 10 is influenced.
  • Each of the engine stop execution bed temperature in the flatland T l — on , the engine calorific value in the flatland Q l — in , the engine heat release value in the flatland Q l — out , and the engine calorific value in the highland Q h — in in is a default value obtained in advance, for example, by experiments and simulations or the like.
  • Each of the catalyst activation temperature T sc and the calorific value per unit fuel ⁇ Q is a fixed value.
  • the engine input air amount Ga is calculated or estimated on the basis of the signal outputted from the sensor 21 .
  • the exhaust heat release value of the passage which does not pass through the turbocharger Q out — NA is calculated or estimated on the basis of the signal outputted from the sensor 24 .
  • the exhaust heat release value of the passage which passes through the turbocharger Q out — TC is calculated or estimated on the basis of the signal outputted from the sensor 23 .
  • the exhaust amount ratio of the passage which passes through the turbocharger WGV is calculated or estimated on the basis of an opening degree of the valve 17 .
  • the air/fuel ratio A/F is measured by the sensor 22 .
  • Each of the atmospheric pressure Pi in the flatland and the atmospheric pressure P h in the highland is estimated on the basis of a correlation between the opening degree of the valve 15 and the intake amount indicated by the signal outputted from the sensor 21 .
  • the atmospheric pressure P l in the flatland is obtained in advance when the vehicle 1 drives in the flatland (i.e. before the vehicle 1 arrives at the highland). Since various known aspects can be applied to a method of estimating the atmospheric pressure, the explanation of the details of the method is omitted.
  • the ECU 30 performs the idling stop processing if the catalyst bed temperature of the catalyst 16 is greater than the calculated engine stop execution bed temperature in the highland T h — on .
  • the ECU 30 forbids the idling stop processing if the catalyst bed temperature of the catalyst 16 is less than the calculated engine stop execution bed temperature in the highland T h — on .
  • a case where the catalyst bed temperature of the catalyst 16 is equal to the calculated engine stop execution bed temperature in the highland T h — on may be included in either one of cases.
  • the catalyst bed temperature may use a value measured by the sensor 25 , or may be estimated from, for example, exhaust temperature and the exhaust amount ratio of the passage which passes through the turbocharger WGV. Since various known aspects can be applied to a method of estimating the catalyst bed temperature, the explanation of the details of the method is omitted.
  • FIG. 2 is one example of a map illustrating the relation between the atmospheric pressure and the catalyst bed temperature at which the engine stop is executed.
  • the ECU 30 determines whether or not it is timing to perform the engine stop determination (step S 101 ). If it is determined that it is not the timing to perform the engine stop determination (the step S 101 : No), the processing is ended. On the other hand, if it is determined that it is the timing to perform the engine stop determination (the step S 101 : Yes), the ECU 30 obtains values which are indicated by the signals outputted from the various sensors (step S 102 ).
  • the ECU 30 may determine whether or not it is timing to perform the engine stop determination by determining whether or not a predetermined time has passed since the previous engine stop determination was performed.
  • the ECU 30 calculates the engine stop execution bed temperature in the highland T h — on on by using the aforementioned equations (1) to (3) (step S 103 ). Then, the ECU 30 determines whether or not the measured or estimated catalyst bed temperature is greater than the calculated engine stop execution bed temperature in the highland T h — on (step S 104 ).
  • the ECU 30 allows the idling stop processing (i.e. engine stop when the vehicle 1 stops) to be performed (step S 105 ).
  • the ECU 30 forbids the idling stop processing (step S 106 ).
  • the engine stop execution bed temperature in the highland T h — on may be corrected by using a coefficient obtained from a learned driving pattern of a driver of the vehicle 1 (e.g. an accelerator operation of the driver during a catalyst warming up period, etc.), a coefficient associated with obtained information regarding a driving route of the vehicle 1 (e.g. a signal interval, a road surface slope, traffic congestion information, etc.), or the like.
  • a coefficient obtained from a learned driving pattern of a driver of the vehicle 1 e.g. an accelerator operation of the driver during a catalyst warming up period, etc.
  • a coefficient associated with obtained information regarding a driving route of the vehicle 1 e.g. a signal interval, a road surface slope, traffic congestion information, etc.
  • the present invention can be applied not only to a vehicle which is provided with the idling stop mechanism but also a hybrid vehicle.
US14/350,717 2011-11-01 2011-11-01 Control apparatus for internal combustion engine Abandoned US20140230783A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/075186 WO2013065127A1 (ja) 2011-11-01 2011-11-01 内燃機関の制御装置

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US (1) US20140230783A1 (ja)
EP (1) EP2775124A4 (ja)
JP (1) JP5737421B2 (ja)
CN (1) CN103764976A (ja)
WO (1) WO2013065127A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11085389B1 (en) * 2020-05-19 2021-08-10 Ford Global Technologies, Llc Methods and system for automatic engine stopping

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015224109A1 (de) * 2015-12-02 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Start-Stopp-Einrichtung zum Einleiten eines automatischen Abschaltvorgangs einer Antriebsmaschine eines Kraftfahrzeugs

Family Cites Families (13)

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JP2000337189A (ja) * 1999-05-26 2000-12-05 Toyota Motor Corp 内燃機関の制御装置
JP3709746B2 (ja) * 1999-08-03 2005-10-26 株式会社デンソー エンジンの自動制御装置
JP3880752B2 (ja) * 1999-08-06 2007-02-14 本田技研工業株式会社 エンジン自動始動停止制御装置
JP2001173504A (ja) * 1999-12-17 2001-06-26 Honda Motor Co Ltd 触媒温度の推定装置
JP2002188484A (ja) * 2000-12-15 2002-07-05 Nissan Motor Co Ltd 内燃機関の制御装置
JP3716799B2 (ja) * 2002-02-20 2005-11-16 トヨタ自動車株式会社 機関一時停止を伴う車輌用内燃機関の運転方法
JP2005003004A (ja) * 2004-09-09 2005-01-06 Denso Corp エンジンの自動制御装置
JP2007309113A (ja) * 2006-05-16 2007-11-29 Toyota Motor Corp 動力出力装置、それを搭載した車両及び動力出力装置の制御方法
JP4175385B2 (ja) * 2006-05-29 2008-11-05 トヨタ自動車株式会社 内燃機関の排気浄化触媒暖機システム
JP4973374B2 (ja) * 2007-08-07 2012-07-11 日産自動車株式会社 ハイブリッド原動機の制御装置
JP2010019178A (ja) * 2008-07-11 2010-01-28 Denso Corp エンジンの制御装置
US8392091B2 (en) * 2008-08-22 2013-03-05 GM Global Technology Operations LLC Using GPS/map/traffic info to control performance of aftertreatment (AT) devices
DE102009010926B4 (de) * 2009-02-27 2019-05-16 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Betreiben einer Brennkraftmaschine sowie eine Steuer- und/oder Regeleinrichtung hierfür

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11085389B1 (en) * 2020-05-19 2021-08-10 Ford Global Technologies, Llc Methods and system for automatic engine stopping

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JP5737421B2 (ja) 2015-06-17
EP2775124A1 (en) 2014-09-10
CN103764976A (zh) 2014-04-30
WO2013065127A1 (ja) 2013-05-10
JPWO2013065127A1 (ja) 2015-04-02
EP2775124A4 (en) 2015-04-08

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Owner name: TOYOTA JIDOSHA KABUSHIKI KAISHA, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SUGIHARA, HIROYUKI;REEL/FRAME:032637/0035

Effective date: 20140313

STCB Information on status: application discontinuation

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