Aftertreatment Systems to Meet NSVI, BSVI Regulation Limits

Paper #:
  • 2017-01-0941

Published:
  • 2017-03-28
Abstract:
Future emissions regulations proposed for the Asian automotive industry (BSVI for India and NSVI regulations for China) are strict and similar to EU VI regulations. As a result, they will require both advanced NOx control as well as advanced Particulate Matter (PM) control. This will drive implementation of full Catalyzed Soot Filter (CSF) and simultaneous NOx control using Selective Catalytic Reduction (SCR) technologies. In this work, we present the performance of various Diesel Oxidation Catalyst (DOC), CSF, SCR and Ammonia slip catalyst (ASC) systems utilizing the World Harmonized Transient Cycle (WHTC). Aftertreatment Systems (ATS) required for both active and passive filter regeneration applications will be discussed. The sensitivity of key design parameters like catalyst technology, PGM loading, catalyst sizing to meet the regulation limits has been investigated. The impact of operating conditions like cycle temperature and urea dosing strategy on the overall performance has also been studied. Model simulations and experimental validations along with thermal management studies have been conducted to propose a suitable ATS for BSVI and NSVI applications.
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