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SCANIA INDUSTRIAL ENGINES SCR system EU Stage IV, US Tier 4f SCR (Selective Catalytic Reduction) technology is used on Scania’s engines for X content in the exhaust gases. A chemical process is started by injecting reductant, an urea and water X in the best possible way. Scania is making use of a system that is carefully developed and tested in our own The reductant tank is available in different sizes and is heated by the engine’s Standard Optional 1 Evaporator module - 2 Reductant pressure line 2.5 m 4 m, 5 m, 6.5 m 3 Coolant hose for tank and pump - - 4 Coolant valve - 5 Reductant fluid return line 2.5 m 4 m, 5 m, 6.5 m 6 Reductant tank 38 l 45 l, 60 l, 63 l, 70 l 7 Coolant hose, return from tank and - - 8 NOx sensor with control unit - 9 Oxidation catalytic converter 1) Engine-mounted Separately 10 Temperature sensor - 11 SCR catalyst - 12 NO x sensor with control unit - Standard Optional 1 Customer interface, SCR system – 2 between engine and SCR control unit 3 m 4.5 m, 6 m 3 NO x sensor electrical cable 3 m 4.5 m, 6 m 4 Electrical interface, SCR system - 5 Reductant doser electrical cable 3 m 4.5 m, 6 m 6 Temperature sensor electrical cable 3 m 4.5 m, 6 m, 9 m 7 NO x sensor electrical cable 3 m 4.5 m, 6 m, 9 m The principle for Scania SCR system This specification may be revised without notice. 1) Not DC13 085A or DC16. Mechanical system Electric system 6 10 5 8 4 12 3 7 9 2 11 1 4 6 5 2 3 7 1 |