F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
F02D 41/40 (2006.01) F02M 45/02 (2006.01) F02B 3/06 (2006.01)
Patent
CA 2310830
The invention is directed towards a method for adjusting the NO2 to NO content of a diesel engine's exhaust without affecting engine performance. The NO2 to NO ratio is adjusted by varying the amount and timing of secondary hydrocarbon injection during the engine's expansion stroke. The appropriate amount of secondary injected hydrocarbon and the appropriate injection timing are determined from calibration values obtained by direct engine measurements and the desired NO2:NO ratio.
L'invention porte sur un procédé de régulation le rapport NO2/NO dans l'échappement d'un moteur diesel sans affecter les performances du moteur. Le réglage du rapport NO2/NO se fait en faisant varier la quantité et l'avance de l'injection secondaire d'hydrocarbure pendant la course de détente. La quantité et l'avance à l'injection idoines sont fournies par référence à des valeurs d'étalonnage fournies par des mesures directes sur le moteur et au rapport NO2/NO souhaité.
Dean Anthony Marion
Pink Harry Stuard
Weissman Walter
Borden Ladner Gervais Llp
Exxonmobil Research And Engineering Company
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