| 摘要 |
Diesel engine 1 provided with an exhaust line 3 comprising a diesel oxidation catalyst, DOC 30, connected in series with a selective reduction catalyst, SCR 32, and a first NOx sensor 34 located upstream of the DOC. Preferably the first NOx sensor is located downstream of a turbine 41 of a turbocharger 4 and a diesel particulate filter, DPF 31, is located between the DOC and SCR. There may be a second NOx sensor 35 located downstream of the SCR and a control system 5 connected to the first NOx sensor. A method for operating a Diesel engine is also claimed which comprises measuring a NOx concentration and an oxygen concentration upstream of the DOC and measuring a NOx concentration downstream of the SCR. |
