Analysis and Optimization of Typical Faults With Small Injection Volume of Urea Nozzle
Selective catalytic reduction(SCR)is one of the main aftertreatment technologies for removing ni-trogen oxides from diesel exhaust,urea is used to reduce pollutant NOx emission to meet the NOx limit require-ments of national VI emission regulations.Urea nozzle is the main component of urea injection system.In the process of product application,it is easy to clog the urea nozzle,resulting in small faults of actual urea injection quantity.Therefore,this paper aims at the typical market failure mode of urea nozzle urea injection volume re-duction,analyze the cause of the failure and propose targeted improvement measures,improving the reliability of urea injection system.
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