The Cummins Aftertreatment System uses selective catalytic reduction (SCR) to reduce oxides of nitrogen (NOx) and particulate matter (PM) emissions to near-zero levels without compromising fuel economy. It sprays diesel exhaust fluid into the exhaust stream, which converts NOx into harmless gases through a catalytic reaction. System maintenance is unchanged, and it uses approximately 2% as much diesel exhaust fluid as fuel.
1. Every System. Integrated.
TM
Cummins Aftertreatment System
■ Reduces Oxides of Nitrogen (NOx) and Particulate Matter (PM)
■ Achieves near-zero emissions, maintains industry-best fuel economy
■ Diesel Exhaust Fluid (DEF) usage approximately 2% of fuel consumption
■ Cummins Selective Catalytic
Reduction (SCR) Catalyst
Converts NOx into harmless
nitrogen gas and water vapor. ■ Decomposition Reactor
Converts Diesel Exhaust
Fluid into ammonia (NH3)
through hydrolysis.
■ Diesel Exhaust Fluid
■ Electronic Controls (DEF) Dosing Valve
Single Electronic Control Allows a fine mist of
Module (ECM) constantly DEF to be sprayed into
adjusts engine and the exhaust stream of the
aftertreatment operations Decomposition Reactor.
for peak performance
and emissions control.
■ Cummins Particulate Filter
Collects and oxidizes carbon to remove
Particulate Matter (PM) from the exhaust.
Cummins Aftertreatment Systems are offered in standard baseline and modified baseline
configurations for ease of installation. Modified baseline configuration pictured.