A particle filter for ammonia coverage ratio and input simultaneous estimations in Diesel-engine SCR system.

ABSTRACT: As NOx emissions legislation for Diesel-engines is becoming more stringent than ever before, an aftertreatment system has been widely used in many countries. Specifically, to reduce the NOx emissions, a selective catalytic reduction(SCR) system has become one of the most promising techniques for Diesel-engine vehicle applications. In the SCR system, input ammonia concentration and ammonia coverage ratio are regarded as essential states in the control-oriental model. Currently, an ammonia sensor placed before the SCR Can is a good strategy for the input ammonia concentration value. However, physical sensor would increase the SCR system cost and the ammonia coverage ratio information cannot be directly measured by physical sensor. Aiming to tackle this problem, an observer based on particle

SUBMITTER: Sun K 

PROVIDER: S-EPMC5800695 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature