Method of calculating NOx mass reduced from lean NOx trap during regeneration

• Main Authors: PARK JIN-WOO, LIM SERA, LEE JIN-HA, WITTKA THOMAS, SCHAUB JOSCHKA, VOVK ALEXANDER
• Format: Patent
• Language: Chinese; English
• Published: 12.10.2016
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

A method of calculating a nitrogen oxide (NOx) mass reduced from a lean NOx trap (LNT) during regeneration includes calculating a C3H6 mass flow used to reduce the NOx among a C3H6 mass flow flowing into the LNT of an exhaust purification device, calculating a NH3 mass flow used to reduce the NOx among a NH3 mass flow generated in the LNT, calculating a reduced NOx mass flow based on the C3H6 mass flow used to reduce the NOx and the NH3 mass flow used to reduce the NOx, and calculating the reduced NOx mass by integrating the reduced NOx mass flow over a regeneration period. 本发明涉及种计算在再生期间由NOx捕集系统(LNT)还原的氮氧化物(NOx)的质量的方法，包括计算在流入排气净化装置LNT中的CH质量流量中的用于还原NOx的CH质量流量，计算在LNT中生成的NH质量流量中的用于还原NOx的NH质量流量，基于用于还原NOx的CH质量流量和用于还原NOx的NH质量流量来计算还原的NOx的质量流量，以及通过对在再生期间还原的NOx质量流量进行积分来计算经过还原的NOx的质量。