EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
- Neue Suche nach: IMAI DAICHI
- Neue Suche nach: IMAI DAICHI
To suppress the outflow of ammonia from a catalyst while promoting the decontamination of NOx in the catalyst.SOLUTION: An exhaust emission control device for an internal combustion engine includes a catalyst 20 that is disposed in an exhaust passage of the internal combustion engine and is capable of storing oxygen, an oxygen storage amount calculation unit 61 that calculates the amount of oxygen stored in a downstream portion of the catalyst, and an air-fuel ratio control unit 62 that controls the air-fuel ratio of the inflow exhaust gas flowing into the catalyst. The air-fuel ratio control unit executes rich control for making the air-fuel ratio of the inflow exhaust gas richer than the stoichiometric air-fuel ratio, and when the amount of oxygen storage is relatively large, controls the air-fuel ratio of the inflow exhaust gas so that the amount of reducing agent supplied to the catalyst in the rich control increases as compared with that when the amount of oxygen storage is relatively small.SELECTED DRAWING: Figure 5
【課題】触媒におけるＮＯｘの浄化を促進しつつ、触媒からアンモニアが流出することを抑制する。【解決手段】内燃機関の排気浄化装置は、内燃機関の排気通路に配置されると共に酸素を吸蔵可能な触媒２０と、触媒の下流側部分の酸素吸蔵量を算出する酸素吸蔵量算出部６１と、触媒に流入する流入排気ガスの空燃比を制御する空燃比制御部６２とを備える。空燃比制御部は、流入排気ガスの空燃比を理論空燃比よりもリッチにするリッチ制御を実行し、酸素吸蔵量が相対的に多い場合には、酸素吸蔵量が相対的に少ない場合に比べて、リッチ制御において触媒に供給される還元剤の量が多くなるように流入排気ガスの空燃比を制御する。【選択図】図５
Dokumentinformationen
EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
内燃機関の排気浄化装置
2023-08-22
Patent
Elektronische Ressource
Japanisch
| IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein |
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