Engine RPM Measured NOx conversion Calculated efficiency of NOx conversion Calculated NOx concentration behind turbocharger Measured NOx conversion range 1 Efficiency threshold of NOx conversion range 1 Diesel emissions re-treatment: status-Status of DeNOx catalytic converter Diesel emissions re-treatment: status-Desulfurization of DeNOx catalytic converter NOx-Raw emission model value before reduction catalyst NOx sensor before SCR cat conv: O2 concen. NOx sensor before SCR cat conv: offset correction factor NOx sensor before SCR cat conv: NOx concentration

Reducing agent pump: activation Pressure sensor for reducing agent: measured pressure Reducing agent metering system heating circuit 2: actual current Pressure sensor for reducing agent: voltage Sensor for reducing agent tank temperature: voltage NOx-sensor Current temperature with NOx Reduction CAT Pump for reducing agent: speed Injector 1 bank 1 for reducing agent before SCR cat: activation NOx sensor before SCR catalytic converter: supply voltage Reducing agent inj. quantity: spec. value