JP7364000B1 - NOx発生量制御装置 - Google Patents
NOx発生量制御装置 Download PDFInfo
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- 239000000446 fuel Substances 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 230000001186 cumulative effect Effects 0.000 claims description 36
- 238000000746 purification Methods 0.000 claims description 26
- 230000033228 biological regulation Effects 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000003134 recirculating effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 abstract description 13
- 239000000243 solution Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000006722 reduction reaction Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 240000006829 Ficus sundaica Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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]
- F02D41/0077—Control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position
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- 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
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
-
- 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
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D43/00—Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/02—Catalytic activity of catalytic converters
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
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- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1621—Catalyst conversion efficiency
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1622—Catalyst reducing agent absorption capacity or consumption amount
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
- F02D2021/083—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine controlling exhaust gas recirculation electronically
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Supercharger (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
図1は、一の実施形態に係るNOx発生量制御システム1の構成を示す模式図である。図1に示すように、NOx発生量制御システム1は、エンジン10と、ターボチャージャー20と、EGR(Exhaust Gas Recirculation)バルブ30と、SCR(Selective Catalytic Reduction;選択還元触媒)装置40と、NOxセンサ50aと、NOxセンサ50bと、NOx発生量制御装置60とを備える。NOx発生量制御システム1は、車両に搭載されており、エンジン10の排気ガスに含まれるNOxの発生量を制御する。
以下、NOx発生量制御装置60の構成及び動作を詳細に説明する。
図2は、NOx発生量制御装置60の構成を示す図である。NOx発生量制御装置60は、通信部61と、記憶部62と、制御部63と、を有する。
以下、制御部63により実現される各部の構成を説明する。
図6は、NOx発生量制御装置60における処理シーケンスの例を示す図である。図6に示す処理シーケンスは、一例として、所定の時間間隔が経過した時刻においてEGRバルブ30の開度及びコンプレッサ22の開度を決定する動作を示している。
以上説明したように、NOx発生量制御装置60は、NOxセンサ50aが検出したNOx濃度とエンジン10の排気量とに基づいてNOx排出量を算出する排出量算出部631と、複数のNOx排出量を加算したNOx積算量を算出する積算量算出部632と、エンジン10を備える移動体の移動距離又はエンジン10の出力値に関連付けられたNOx積算量の目標値を特定する特定部633と、エンジン10の回転数と燃料噴射量とに基づいて、所定の時間又は所定の移動距離におけるNOxの予測積算量を示すNOx予測量を推定する推定部634と、NOx予測量とNOx積算量との合計が目標値を超えるか否かを判定する判定部635と、判定部635の判定結果と、NOxの排出上限値と、目標値とNOx積算量との差とに基づいて、NOx排出予定量を決定し、当該NOx排出予定量に対応する、EGRバルブ30の開度及びターボチャージャー20の開度の少なくともいずれかを決定する決定部636と、を有する。
10 エンジン
11 吸気通路
12 排気通路
20 ターボチャージャー
21 タービン
22 コンプレッサ
30 EGRバルブ
31 EGR装置
40 SCR装置
50a NOxセンサ
50b NOxセンサ
60 NOx発生量制御装置
61 通信部
62 記憶部
63 制御部
631 排出量算出部
632 積算量算出部
633 特定部
634 推定部
635 判定部
636 決定部
Claims (3)
- 所定の時間間隔ごとに、エンジンの排気ガスが流れる排気通路に設けられた浄化装置の下流側で検出されたNOx濃度と、前記エンジンの排気量と、に基づいてNOx排出量を算出する排出量算出部と、
現在の時刻までに前記排出量算出部が前記所定の時間間隔ごとに算出した複数の前記NOx排出量を加算したNOx積算量を算出する積算量算出部と、
前記所定の時間間隔ごとに、記憶部に記憶された前記エンジンを備える移動体の移動距離又は前記エンジンの出力値を取得し、前記記憶部に記憶された、前記移動距離又は前記エンジンの出力値と前記NOx積算量の目標値とが関連付けられた目標値テーブルを参照することにより、前記所定の時間間隔ごとの前記目標値を特定する特定部と、
現在の時刻から前記所定の時間間隔前の時刻までの前記エンジンの回転数と燃料噴射量とに基づく前記NOx排出量の積算値を算出し、算出した前記積算値と前記所定の時間間隔とに基づいて単位時間あたりのNOx排出量を特定することにより、前記現在の時刻から所定の時間が経過した時刻までのNOxの予測積算量を示すNOx予測量を推定する推定部と、
前記現在の時刻から前記所定の時間が経過した時刻において、前記現在の時刻から前記所定の時間が経過した時刻における前記NOx予測量と前記現在の時刻における前記NOx積算量との合計が、前記現在の時刻から前記所定の時間が経過した時刻における前記目標値を超えるか否かを判定する判定部と、
前記判定部の判定結果と、NOxの排出上限値と、前記目標値と前記NOx積算量との差とに基づいて、前記所定の時間間隔ごとのNOx排出予定量を決定し、当該NOx排出予定量に対応する、前記排気ガスを前記エンジンへ再循環させる通路に設けられたバルブの開度を決定する決定部と、
を有し、
前記目標値は、排出ガス量の規制値に対応する、所定の時刻における前記NOx予測量と前記所定の時刻における前記NOx積算量との合計の上限値であり、
前記決定部は、前記判定部が、前記NOx積算量と前記NOx予測量との合計が前記目標値を超えると判定した場合、NOxの排出下限値に対応する前記NOx排出予定量を決定し、前記判定部が、前記NOx積算量と前記NOx予測量との合計が前記目標値を超えないと判定した場合、前記目標値と前記NOx積算量との差よりも小さい値の前記NOx排出予定量であって、前記排出上限値を上限として前記NOx予測量よりも大きい前記NOx排出予定量を決定する、
NOx発生量制御装置。 - 前記排出量算出部は、前記浄化装置の上流側で検出されたNOx濃度、及び前記浄化装置の下流側で検出されたNOx濃度に基づいて、前記浄化装置によるNOxの浄化率を算出し、
前記推定部は、前記浄化率にさらに基づいて、前記浄化装置の下流側の前記NOx予測量を決定する、
請求項1に記載のNOx発生量制御装置。 - 前記決定部は、前記浄化率が閾値未満である場合、前回決定した前記NOx排出予定量以下の前記NOx排出予定量を決定する、
請求項2に記載のNOx発生量制御装置。
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JP2022144525A JP7364000B1 (ja) | 2022-09-12 | 2022-09-12 | NOx発生量制御装置 |
DE102023121591.4A DE102023121591A1 (de) | 2022-09-12 | 2023-08-11 | NOx-Erzeugungsmengen-Steuereinheit |
US18/453,492 US12071879B2 (en) | 2022-09-12 | 2023-08-22 | NOx generation amount control device |
CN202311096997.0A CN117685115A (zh) | 2022-09-12 | 2023-08-28 | 氮氧化物生成量控制装置 |
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JP2010112290A (ja) | 2008-11-07 | 2010-05-20 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
US20170248091A1 (en) | 2014-11-17 | 2017-08-31 | Volkswagen Aktiengesellschaft | Control unit for a combustion engine |
JP2019015239A (ja) | 2017-07-07 | 2019-01-31 | 株式会社豊田自動織機 | エンジンの制御装置 |
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JP5115464B2 (ja) | 2008-12-15 | 2013-01-09 | トヨタ自動車株式会社 | 内燃機関の制御パラメータの設定装置 |
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- 2023-08-11 DE DE102023121591.4A patent/DE102023121591A1/de active Pending
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JP2010112290A (ja) | 2008-11-07 | 2010-05-20 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
US20170248091A1 (en) | 2014-11-17 | 2017-08-31 | Volkswagen Aktiengesellschaft | Control unit for a combustion engine |
JP2019015239A (ja) | 2017-07-07 | 2019-01-31 | 株式会社豊田自動織機 | エンジンの制御装置 |
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DE102023121591A1 (de) | 2024-03-14 |
CN117685115A (zh) | 2024-03-12 |
US20240084725A1 (en) | 2024-03-14 |
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