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EXHAUST PURIFICATION DEVICE AND METHOD OF CALCULATING NH3 MASS GENERATED IN LEAN NOx TRAP OF EXHAUST PURIFICATION DEVICE
EXHAUST PURIFICATION DEVICE AND METHOD OF CALCULATING NH3 MASS GENERATED IN LEAN NOx TRAP OF EXHAUST PURIFICATION DEVICE
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机译:排气净化装置及计算排气净化装置贫NOx捕集中产生的NH3的方法
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摘要
A method of calculating an ammonia (NH3) mass generated in a lean NOx trap (LNT) of an exhaust purification device includes sequentially calculating a NH3 mass flow at a downstream of each slice from a first slice to an n-th slice, and integrating the NH3 mass flow at the downstream of the n-th slice over a predetermined time, wherein the calculation of the NH3 mass flow at the downstream of the i-th slice comprises calculating a NH3 mass flow flowing into the i-th slice, calculating a NH3 mass flow generated at the i-th slice, and adding the NH3 mass flow generated at the i-th slice to a value obtained by subtracting the NH3 mass flow used to reduce the NOx and the O2 at the i-th slice from the NH3 mass flow flowing into the i-th slice.
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