Vehicle Aftertreatment System

{
  "id": "MLC-T-ENV-029578",
  "term": "Vehicle Aftertreatment System",
  "field": "Environment",
  "definition": "This system is comprised of multiple components, which are responsible for filtering the engine exhaust gas to meet tailpipe emission requirements. After the exhaust gas of the engine is filtered through the diesel particulate filter (DPF) and the diesel oxidation catalyst to reduce particulate matter, diesel exhaust fluid (DEF) is injected into the exhaust gas mixture, then reduced to nitrogen and water by chemical conversion within the selective catalytic reducer (SCR) before being released into the atmosphere via the vehicle's tailpipe.",
  "references": [
    "DOE Alternative Fuels Data Center Glossary at https://afdc.energy.gov/glossary.html"
  ],
  "url": "https://mlchart.com/terminology/environment/vehicle-aftertreatment-system/"
}