JP6375874B2 - 制御装置 - Google Patents
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- JP6375874B2 JP6375874B2 JP2014222580A JP2014222580A JP6375874B2 JP 6375874 B2 JP6375874 B2 JP 6375874B2 JP 2014222580 A JP2014222580 A JP 2014222580A JP 2014222580 A JP2014222580 A JP 2014222580A JP 6375874 B2 JP6375874 B2 JP 6375874B2
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- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
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- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
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- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
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- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
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- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
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- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
- F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
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- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
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- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
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- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/10386—Sensors for intake systems for flow rate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/10393—Sensors for intake systems for characterising a multi-component mixture, e.g. for the composition such as humidity, density or viscosity
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- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D2041/1472—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a humidity or water content of the exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0418—Air humidity
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- 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
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- 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
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- 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
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Description
本発明は、上述の点に鑑みてなされたものであり、その目的は、凝縮水の発生量の推定精度が向上した内燃機関の制御装置を提供することにある。
[一実施形態]
本発明の一実施形態による制御装置は、図1に示すエンジンに用いられている。
先ず、エンジン10の基本構成について図1を参照して説明する。
図1に示すように、エンジン10は、エンジン本体20、吸気装置30、排気装置40、過給機50、高圧排気還流装置60、および低圧排気還流装置70を備えている。
次に、制御装置80について図1、図2、図3を参照して説明する。
図1、図2に示す制御装置80は、マイクロコンピュータを主体として構成されており、エンジン10の各種機器および車両に設けられる各種センサと電気的に接続される。上記各種センサには、例えば、エアフロメータ81、EGRクーラ74に設けられている第1冷却温度センサ82、インタークーラ35に設けられている第2冷却温度センサ83、排気温度センサ84、大気圧センサ85、ブースト圧センサ86、低圧EGR通路72の分岐点と合流点との差圧を検出する差圧センサ87の他に、図示しないクランク角センサ、アクセル開度センサ、スロットル開度センサ、水温センサ、車速センサなどが含まれる。本実施形態では、エアフロメータ81には、吸入空気温度センサ88および相対湿度センサ89が内蔵されている。
ステップS3では、吸入空気圧PFA[Pa]が推定される。具体的には、先ず、吸入空気量QFA[m3/s]に基づき吸入空気の質量流量MFA[kg/s]が算出される。続いて、質量流量MFAに基づきエアクリーナ34での圧力損失ΔPCL[Pa]が推定される。続いて、大気圧PATMと圧力損失ΔPCLとに基づき吸入空気圧PFAが推定される。ステップS3のあと、処理はステップS4に移行する。
具体的には、先ず、式(1)の関係から容積絶対湿度VH[g/m3]が算出される。式(1)において、e(TFA)は飽和水蒸気圧[Pa]であり、吸入空気温度TFAに基づき例えばマップ等から求められる。
VH=[{RH×e(TFA)}/{8.31447×(273.15+TFA)}]×18・・・(1)
SH=VH/ρDA・・・(2)
ρDA=PFA/{287×(273.15+TFA)}・・・(3)
ステップS4のあと、処理はステップS5に移行する。
以上説明したように、本実施形態では、制御装置80は、吸入空気の相対湿度RHと吸入空気温度TFAと吸入空気圧PFAとに基づき吸入空気の重量絶対湿度SHを算出し、吸入空気量QFAから求めた吸入空気の質量流量MFAと重量絶対湿度SHとに基づき吸入空気中の水蒸気量MW1を算出する。
このように構成することで、吸入空気圧検出用のセンサを追加することなく、元々車両に設けられる大気圧センサを用いて吸入空気圧PFAを推定することができるので、コストダウンが可能である。
したがって、センサのハウジングの共通化、センサを外部に接続するためのハーネスの本数の削減、センサ取り付け工数の削減によりコストダウンが可能である。
第1実施形態では、制御装置は、凝縮水の蓄積量MCON1、MCON2に基づき低圧排気還流量を制御するように構成されていた。これに対し、本発明の他の実施形態では、制御装置は、凝縮水の発生量ΔMCON1、ΔMCON2に基づき低圧排気還流量を制御するように構成されてもよい。
本発明の他の実施形態では、エンジン本体はレシプロ型に限らず、他の型式のものであってもよい。
本発明の他の実施形態では、吸入空気温度センサおよび相対湿度センサの一方または両方は、エアフロメータ81に内蔵されていなくてもよい。
本発明の他の実施形態では、高圧排気還流装置が設けられなくてもよい。
以上、本発明は、上述した実施形態に何ら限定されるものではなく、その趣旨を逸脱しない範囲において種々の形態で実施可能である。
33・・・吸気通路
43・・・排気通路
50・・・過給機
51・・・コンプレッサ
52・・・タービン(抵抗要素)
70・・・低圧排気還流装置
80・・・制御装置(絶対湿度算出手段、第1水蒸気量算出手段、第2水蒸気量算出手段、発生量推定手段、蓄積量算出手段、還流量制御手段、吸入空気圧推定手段)
81・・・エアフロメータ(吸入空気量検出部)
85・・・大気圧センサ(吸入空気圧検出部)
88・・・吸入空気温度センサ(吸入空気温度検出部)
89・・・相対湿度センサ(相対湿度検出部)
Claims (2)
- 過給機(50)と、排気抵抗となる抵抗要素(52)に対する下流側の排気通路(43)から前記過給機のコンプレッサ(51)に対する上流側の吸気通路(33)へ排気を還流させる低圧排気還流装置(70)と、吸入空気量(QFA)を検出する吸入空気量検出部(81)と、吸入空気温度(TFA)を検出する吸入空気温度検出部(88)と、吸入空気の相対湿度(RH)を検出する相対湿度検出部(89)と、吸入空気圧(PFA)を検出する吸入空気圧検出部(85)と、前記低圧排気還流装置が還流させる排気を冷却するEGRクーラ(74)と、前記コンプレッサによる圧縮により昇温した過給空気を冷却するインタークーラ(35)と、を備える内燃機関(10)を制御する制御装置(80)であって、
前記相対湿度と前記吸入空気温度と前記吸入空気圧とに基づき吸入空気の絶対湿度(SH)を算出する絶対湿度算出手段と、
前記吸入空気量から求めた吸入空気の質量流量(MFA)と前記絶対湿度とに基づき吸入空気中の水蒸気量(MW1)を算出する第1水蒸気量算出手段と、
前記内燃機関の燃焼室(21)での燃焼によって発生する水蒸気量(M W2 )を算出する第2水蒸気量算出手段と、
前記吸入空気中の水蒸気量と、前記燃焼によって発生する水蒸気量と、前記EGRクーラおよび前記インタークーラの冷却条件(T EGR 、T INT )とに基づき、前記内燃機関における凝縮水の発生量(ΔM CON1 、ΔM CON2 )を推定する発生量推定手段と、
前記発生量、または、当該発生量から求められる凝縮水の蓄積量(M CON1 、M CON2 )に基づき、前記低圧排気還流装置が還流させる排気の量である低圧排気還流量を制御する還流量制御手段と、
を有することを特徴とする制御装置。 - 前記吸入空気圧検出部は大気圧センサであり、
前記吸入空気量から求められる吸入空気の質量流量に基づき、前記内燃機関の吸気通路に設けられているエアクリーナ(34)での圧力損失(ΔPCL)を推定し、大気圧と前記圧力損失とに基づき前記吸入空気圧を推定する吸入空気圧推定手段をさらに有することを特徴とする請求項1に記載の制御装置。
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JP2014222580A JP6375874B2 (ja) | 2014-10-31 | 2014-10-31 | 制御装置 |
DE102015116996.7A DE102015116996A1 (de) | 2014-10-31 | 2015-10-06 | Controller |
US14/885,241 US9784196B2 (en) | 2014-10-31 | 2015-10-16 | Controller |
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JP6375874B2 true JP6375874B2 (ja) | 2018-08-22 |
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Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6012890B1 (ja) * | 2016-01-18 | 2016-10-25 | 三菱電機株式会社 | 内燃機関の制御装置及びその制御方法 |
JP6866008B2 (ja) * | 2016-08-23 | 2021-04-28 | ダイハツ工業株式会社 | 内燃機関の制御装置 |
JP6860313B2 (ja) * | 2016-09-12 | 2021-04-14 | 日産自動車株式会社 | エンジンの制御方法、及び、エンジン |
KR101947045B1 (ko) * | 2016-11-11 | 2019-02-12 | 현대자동차 주식회사 | 응축수 제거를 위한 엔진 시스템 |
FR3064678B1 (fr) * | 2017-03-29 | 2021-03-05 | Renault Sas | Procede et systeme d'estimation de la condensation d'un refroidisseur d'air de suralimentation dans un moteur a combustion interne de vehicule automobile |
DE102019202213B3 (de) * | 2019-02-19 | 2020-06-25 | Hitachi Automotive Systems, Ltd. | Verfahren und Vorrichtung zum Vorhersagen und Vermeiden einer Kondensation von Feuchtigkeit in einem Einlasssystem einer Brennkraftmaschine nach dem Kraftmaschinenabschalten |
DE112020001894T5 (de) * | 2019-07-03 | 2022-01-05 | Hitachi Astemo, Ltd. | Steuervorrichtung für verbrennungsmotor |
CN112796898B (zh) * | 2019-10-28 | 2022-08-02 | 浙江义利汽车零部件有限公司 | 一种防止水冷式冷却器下游混合气冷凝的方法及装置 |
EP4158168A4 (en) | 2020-05-28 | 2024-05-15 | Cummins, Inc. | CONDENSATION MANAGEMENT FOR INTERNAL COMBUSTION ENGINES |
FR3112810A1 (fr) * | 2020-07-23 | 2022-01-28 | Psa Automobiles Sa | Procede de limitation des rates de combustion sur un moteur thermique |
CN116335838B (zh) * | 2023-05-12 | 2024-09-17 | 中国第一汽车股份有限公司 | 一种低压废气再循环系统的控制方法、装置、设备及介质 |
CN118030593B (zh) * | 2024-03-06 | 2024-08-23 | 盛联精密气体(上海)有限公司 | 一种三级离心式压缩机的疏水方法及疏水结构 |
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JP2002054510A (ja) * | 2000-08-14 | 2002-02-20 | Niigata Eng Co Ltd | エンジンの蒸気注入システム |
US6817197B1 (en) * | 2003-09-10 | 2004-11-16 | Cummins, Inc. | Intake air dehumidification system for an internal combustion engine |
JP2006220026A (ja) | 2005-02-09 | 2006-08-24 | Denso Corp | 内燃機関の制御装置 |
GB2479768B (en) * | 2010-04-21 | 2017-04-19 | Gm Global Tech Operations Llc | Method for managing the relative humidity in the air path of an internal combustion engine equipped with a low pressure EGR system |
KR20120008202A (ko) | 2010-07-16 | 2012-01-30 | 현대자동차주식회사 | 저압 egr시스템 제어장치 및 방법 |
JP5741032B2 (ja) * | 2011-02-08 | 2015-07-01 | トヨタ自動車株式会社 | 内燃機関の排気再循環システム |
JP5719257B2 (ja) * | 2011-09-02 | 2015-05-13 | ダイムラー・アクチェンゲゼルシャフトDaimler AG | 過給機の制御装置 |
US9249764B2 (en) * | 2012-03-06 | 2016-02-02 | GM Global Technology Operations LLC | Engine control systems and methods with humidity sensors |
US9239020B2 (en) * | 2012-10-16 | 2016-01-19 | Ford Global Technologies, Llc | Condensate accumulation model for an engine heat exchanger |
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US20160123255A1 (en) | 2016-05-05 |
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