METHOD FOR MONITORING AN SCR SYSTEM

摘要

Method for detecting whether an injector with a valve controlled by a PWM signal of an SCR system is at least partially clogged, said system comprising a pump, preferably a positive-displacement pump, driven by a motor and the pressure of which is controlled by a controller that continuously measures the pressure and/or another parameter characteristic of the energy transmitted by the motor to the pump, according to which, during normal operation of the SCR system, specific portions of one of these measurements are compared with equivalent portions stored in a memory.