METHOD FOR HEATING A SCR SYSTEM

摘要

Process for heating a urea component of a SCR system comprising besides said component, a temperature sensor, a heating device in the component, according to which: 1. the temperature (Tcpt) of the liquid in the component is determined and compared to a 1st setpoint (T0); 2. if the temperature (Tcpt) is greater than the 1st setpoint (T0), step 1 is repeated; 3. if the temperature (Tcpt) is less than or equal to the 1st setpoint (T0), the heating device is actuated, 4. the time during which the heating device is actuated is measured and the heating device is stopped if this time is greater than a time t1; 5. the temperature (Tcpt) is determined after a time t2 and compared to a 2nd setpoint (T1 with T1>T0); if the temperature (Tcpt) is less than or equal to the 2nd setpoint (T1) the heating device is actuated and step 4 is repeated; 6. if the temperature (Tcpt) is greater than the 2nd septoint (T1), the heating device is stopped and step 1 is repeated.