SPECIAL INSTRUCTIONS FOR -SCR- EXHAUST SYSTEMS 6-3 E UROCARGO Euro 4/5 6666.6 General specifications 6.1 General specifications This chapter contains important information on the -SCR- exhaust systems fitted on the IVECO series (EuroCargo - Stralis - Trakker). In order to comply with Euro4 Euro5 standards, IVECO has chosen the SCR (selective catalyst reduction) system to reduce the nitrogen oxide (NOx) emissions produced by exhaust gas. SCR is an exhaust gas post-treatment system that uses a catalyzer which, by means of a chemical reaction, transforms NOx nitrogen oxyde into nitrogen and water. This chemical reaction is produced by an additive called AdBlue (a solution of urea + water).
Figure 6.1 125526 1. Engine coolant diverter valve - 2. Temperature sensor for exhaust gas coming out of the catalytic converter - 3. Sensor signal amplifier (5) - 4. Pump module - 5. Nitrogen oxide sensor - 6. Tank for reagent solution (coolant, urea: AdBlue) - 7. AdBlue fluid level indicator control - 8. Intake air humidity sensor - 9. Mixing and injection module - 10. Temperature sensor for exhaust gas entering the catalytic converter - 11. Catalytic converter General specifications Print 603.93.431 Base - January 2008