| 摘要 |
<p>The invention relates to a method and an arrangement for reducing an NOx-content in the exhaust gas of an internal combustion engine (10) in a vehicle, the combustion engine (10) comprising at least one cylinder (11), an intake (12) for the supply of air, an exhaust outlet (14) for discharging exhaust gases into an exhaust after treatment system (40) for reducing emissions of the internal combustion engine (10), wherein an exhaust gas recirculation (80) supplies exhaust gas from the exhaust outlet (14) to the intake (14) of the internal combustion engine (10), and at least two energy absorbers (54, 60) in series in the exhaust flow downstream of the exhaust outlet (14) absorb energy of the exhaust gas. The exhaust gas is overheatied to a first temperature by driving the combustion engine (10) in a range of rotational speed producing hot exhaust gas at the exhaust outlet (14), wherein the first temperature is sufficient to drive the at least two energy absorbers (54, 60), wherein a temperature of the exhaust gas is established downstream of the at least two energy absorbers (54, 60) sufficient to remove NOx from the exhaust gas in the exhaust after treatment system (40) with an efficiency of more than 80%.</p> |
