JP2016089834A - 内燃機関を運転するための方法及び制御装置 - Google Patents
内燃機関を運転するための方法及び制御装置 Download PDFInfo
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims description 27
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000007789 gas Substances 0.000 claims abstract description 50
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000001301 oxygen Substances 0.000 claims abstract description 40
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 40
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 20
- 230000010718 Oxidation Activity Effects 0.000 claims abstract description 13
- 230000003647 oxidation Effects 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 230000003197 catalytic effect Effects 0.000 claims description 88
- 229930195733 hydrocarbon Natural products 0.000 claims description 42
- 150000002430 hydrocarbons Chemical class 0.000 claims description 42
- 239000004215 Carbon black (E152) Substances 0.000 claims description 23
- 238000005259 measurement Methods 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 abstract 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 2
- 238000013500 data storage Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
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Abstract
Description
C10H22 + 15.5O2 → 10CO2 + 11H2O
C10H22 + 31NO → 15.5N2 + 10CO2 + 11H2O
ΔT=mC×MABGAS×αABGAS×HUC/ΔtAUF
式中、mCは触媒コンバータ13内の炭素質量であり、MABGASは触媒コンバータ13を通る排ガス質量流量であり、αABGASは排ガス熱容量であり、HUCは炭素の発熱量であり、ΔtAUFは触媒コンバータ13の昇温期間である。
11 シリンダー
12 排ガス後処理システム
13 触媒コンバータ
14、14’ 排ガス
15 NOxセンサー
16 ラムダセンサー
17 NOxセンサー
18 ラムダセンサー
Claims (8)
- 排ガス後処理システムを備える内燃機関を運転するための方法であって、前記排ガス後処理システムは炭化水素の酸化活性を有する触媒コンバータを備え、
炭化水素の酸化活性を有する前記触媒コンバータの上流の排ガス中の酸素量及び/または窒素酸化物量が、少なくとも一つのセンサーを用いた測定によって決定され、
炭化水素の酸化活性を有する前記触媒コンバータの上流の排ガス中の酸素量及び/または窒素酸化物量が、センサーを用いた測定によって、または代替的に計算によって決定され、
前記触媒コンバータの上流の前記排ガス中の前記酸素量と前記触媒コンバータの下流の前記排ガス中の前記酸素量との酸素量の差、及び/または、前記触媒コンバータの上流の前記排ガス中の前記窒素酸化物量と前記触媒コンバータの下流の前記排ガス中の前記窒素酸化物量との窒素酸化物量の差が決定され、
前記酸素量の差及び/または前記窒素酸化物量の差から少なくとも一つの特性変数が決定され、その関数として、炭化水素の酸化活性を有する前記触媒コンバータの損傷が回避されるように前記内燃機関が運転される、ことを特徴とする方法。 - 特性変数としての前記酸素量の差及び/または前記窒素酸化物量の差から、前記触媒コンバータの炭化水素負荷、及び/または前記炭化水素の酸化中に生じる前記触媒コンバータの温度上昇、及び/または前記炭化水素の焼失レートが決定されることを特徴とする、請求項1に記載の方法。
- 特に特性変数が限界値よりも小さい場合に前記内燃機関の運転はこの特性変数に依存して変化せず、特に各特性変数が限界値よりも大きい場合に前記内燃機関の運転はこの特性変数に依存して変化することを特徴とする、請求項1または2に記載の方法。
- 特に特性変数が下限値よりも小さい場合に前記内燃機関の運転はこの特性変数に依存して変化せず、各特性変数が前記下限値よりも大きく上限値よりも小さい場合に前記内燃機関の運転はこの特性変数に依存して第一の挙動で変化し、特に各特性変数が前記上限値よりも大きい場合に前記内燃機関の運転はこの特性変数に依存して第二の挙動で変化することを特徴とする、請求項1から3のいずれか一項に記載の方法。
- 特に前記各特性変数が前記下限値よりも大きく、かつ前記上限値よりも小さい場合に燃料噴射量が削減され、特に前記各特性変数が前記上限値よりも大きい場合に燃焼用空気量及び優先的に燃料噴射量が追加的に削減されることを特徴とする、請求項4に記載の方法。
- 少なくとも前記触媒コンバータの下流の前記排ガス中の前記窒素酸化物量がNOxセンサーを用いた測定によって決定され、前記触媒コンバータの上流の前記排ガス中の前記窒素酸化物量は更なるNOxセンサーを用いた測定または計算によって決定されることを特徴とする、請求項1から5のいずれか一項に記載の方法。
- 追加的に、前記触媒コンバータの下流の前記排ガス中の前記酸素量がラムダセンサーを用いた測定によって決定され、前記触媒コンバータの上流の前記排ガス中の前記酸素量が更なるラムダセンサー若しくは空気質量センサーを用いた測定または計算によって決定されることを特徴とする、請求項6に記載の方法。
- 排ガス後処理システムを備える内燃機関を運転するための制御装置であって、請求項1から7のいずれか一項に記載の方法を実行するための手段を備えていることを特徴とする制御装置。
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