JP2014525533A - 複数モードエンジンにおける前混合燃焼を制御するための方法及び装置 - Google Patents
複数モードエンジンにおける前混合燃焼を制御するための方法及び装置 Download PDFInfo
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Abstract
Description
図5Bは、同一局部ラムダ範囲が1.3と1.6では、O2分率を13%−14%の比に維持することによってシリンダ内ピーク温度を1500k−2000k内に維持できることを示す。高められた(ブースト)圧力は、新鮮な空気と、EGRと、ガス燃料に基因する部分圧力の合計となる。更に、所定のエンジン負荷ではEGRと、高められた圧力、λ、及びO2は互に作用し合う。例えば、EGRが増加すれば高められた圧力、λ、及びO2は総べて減少する。得られる吸気圧と排気ガス圧のもとでEGRを所定の操作条件で制限する。EGR弁102を一定に維持したとき、高められた圧力は増加し、新鮮な空気λは増加し、シリンダ内O2モル分率が増加する。
12 エンジン制御システム
14 シリンダヘッド
16 ピストン
18 燃料室
30 標準カムシャフト
32 クランクシャフト
34 吸気マニホルド
36 排気マニホルド
38 ガス燃料源
40 燃料計量装置
42 空気/ガスミキサ
HCCI 均一チャージ圧縮点火
PCCI 前混合チャージ圧縮点火
CI 圧縮点火
EGR 再循環排気ガス
TDC 上死点
TAB サーボ空気バイパス
Claims (18)
- (A)内燃エンジンに、ガス燃料、新鮮な空気、再循環排気ガス及び液体燃料の前混合チャージを注油するモードで内燃エンジンを操作し、
(B)所望の範囲内にシリンダ内のピーク温度を維持するためエンジンに対する再循環排気ガス流と新鮮な空気流の少くとも1つを制御する。
ことを特徴とする内燃エンジンの注油方法。 - 上記所望の温度範囲が、1500K〜2000Kである請求項1記載の方法。
- 上記制御が
i.所望のシリンダ内O2モル分率を得るため各エンジンシリンダに対する再循環排気ガス流を制御し、
ii.所望の新鮮な空気ラムダを得るため各エンジンシリンダに対する新鮮な空気流を制御する
ことを含む請求項1記載の方法。 - 上記所望の新鮮な空気ラムダが1.2と1.3の間である請求項3記載の方法。
- 上記所望のシリンダ内O2モル分率が13%と14%の間である請求項3記載の方法。
- 内燃エンジンの吸気マニホルド内のO2センサからの測定データをベースとして、受け入れられるシリンダ内O2モル分率を定める請求項3記載の方法。
- 定められたシリンダ内O2モル分率をエンジン速度と合計燃料量の少くとも1つに依存せしめる請求項6記載の方法。
- 上記新鮮な空気流の制御ステップがターボ廃棄ゲート、ターボ−空気−バイパス及び入口スロットルの少くとも1つを制御することである請求項1記載の方法。
- 上記新鮮な空気流の制御ステップが、先行する装置を最大の値に調節し、付加的空気流の調節が望まれたときのみ順次の装置の夫々を制御することを含み、廃棄ゲート弁と、ターボ−空気−バイパス弁と、及びスロットル弁の2または2以上の組み合せをカスケード順序で制御する請求項1記載の方法。
- 空気流量センサからのデータを用いて新鮮な空気ラムダを定める請求項3記載の方法。
- (A)ガス燃料と、新鮮な空気と、再循環排気ガス及び液体燃料の前混合チャージを注油するモードで内燃エンジンを操作し、
(B)所望のシリンダ内O2モル分率を得るため各エンジンシリンダに対する再循環排気ガス流を制御し、
(C)所望の新鮮な空気ラムダを得るため各シリンダに対する新鮮な空気流を制御する
ことを含む内燃エンジンの注油方法。 - 上記制御ステップがシリンダ内ピーク温度を1500Kと2000Kの間に維持する請求項12記載の方法。
- 各シリンダのため
(A)エンジン速度と合計燃料量をベースとしてシリンダ内の所望O2モル分率を定め、
(B)シリンダ内のO2モル分率を定め、
(C)シリンダ内のO2をシリンダ内の所望のO2に合致するよう変更せしめ、関連するシリンダに対する再循環排気ガス流を調節し、
(D)エンジン速度と合計燃料量をベースとして所望の新鮮な空気ラムダを定め、
(E)受け入れられる新鮮な空気ラムダを定め、
(F)受け入れられる新鮮な空気ラムダを所望の新鮮な空気ラムダに合致するよう変更するためシリンダに対する空気流を調節する、
シリンダ内のピーク温度を1500Kと2000Kの間に維持するため新鮮な空気と、再循環排気ガス及び第1燃料としてのガス燃料と、第2燃料として早く注入したジーゼル燃料との前混合チャージによって注油される内燃エンジン内の燃焼温度制御方法。 - (A)複数のシリンダと、
(B)シリンダに、選択された量のガス燃料を供給するガス燃料供給システムと、
(C)シリンダに、選択された量の液体燃料を供給する液体燃料供給システムと、
(D)シリンダに対する新鮮な空気の流れと再循環排気ガス流を制御する吸気制御システムと、
(E)シリンダ内のピーク温度を所望の範囲に維持するためエンジンに対する再循環排気ガス流と新鮮な空気の流れの少くとも1つを制御する吸気制御システムと、ガス燃料供給システムと、液体燃料供給システムに結合した少くとも1つの制御器と、
より成る内燃エンジン。 - 上記所望の温度範囲が、1500Kと2000Kの間である請求項15記載の内燃エンジン。
- 上記制御器が、
i.所望のシリンダ内O2モル分率を得るため各エンジンシリンダに対する再循環排気ガス流を制御し、
ii.所望の新鮮な空気ラムダを得るため各シリンダに対する新鮮な空気の流れを制御する
請求項15記載の内燃エンジン。 - 上記吸気制御システムが、ターボ廃棄ゲートと、ターボ空気バイパスと、入口スロットルの少くとも1つを含む請求項15記載の内燃エンジン。
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US201161521414P | 2011-08-09 | 2011-08-09 | |
US61/521,414 | 2011-08-09 | ||
PCT/US2012/048770 WO2013022630A1 (en) | 2011-08-09 | 2012-07-30 | Method and apparatus for controlling premixed combustion in a multimode engine |
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US (1) | US20140076291A1 (ja) |
EP (1) | EP2742224A4 (ja) |
JP (1) | JP2014525533A (ja) |
CN (1) | CN103717859A (ja) |
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JP6866754B2 (ja) * | 2016-05-17 | 2021-04-28 | トヨタ自動車株式会社 | 圧縮着火式内燃機関の制御装置 |
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EP2742224A1 (en) | 2014-06-18 |
WO2013022630A1 (en) | 2013-02-14 |
US20140076291A1 (en) | 2014-03-20 |
EP2742224A4 (en) | 2015-12-23 |
CN103717859A (zh) | 2014-04-09 |
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