Methods for Urea Crystallization Analysis: A problem in reduction of NOx for the internal combustion engines

Abstract

Volvo Penta is at present looking to improve the existing engines and to develop a next generation of engines. One of the main challenges with the present engines is the changes in the simulated exhaust flows and the backpressure developed due to the sedimentation of diesel exhaust fluids (DEF). This depends on various factors and parameters such as exhaust temperature, exhaust stream direction, DEF spray length etc. Therefore, a thorough research on this topic of DEF crystallization is useful to understand the behavior of the DEF in the exhaust pipes. The present report deals with the different phases of work involved in the methods that are developed to analyze the problem of Urea crystallization at Volvo Penta, Lundby, Göteborg.