Dodge 2011 Ram Diesel - Manual (Page 91)

DIESEL EXHAUST FLUID — CHASSIS CAB ONLY
Your vehicle is equipped with a Selective Catalytic Re-
duction system in order to meet the very stringent diesel
emissions standards required by the Environmental Pro-
tection Agency. Selective Catalytic Reduction (SCR) is the
first and only technology in decades to be as good for the
environment as it is good for business and vehicle
performance.
The purpose of the SCR system is to reduce levels of NOx
(oxides of nitrogen emitted from engines) that are harm-
ful to our health and the environment to an almost
near-zero level. Small quantities of Diesel Exhaust Fluid
(DEF) are injected into the exhaust upstream of a catalyst
where, when vaporized, convert smog-forming nitrogen
oxides (NOx) into harmless nitrogen (N2) and water
vapor (H2O), two natural components of the air we
breathe. You can operate with the comfort that your
vehicle is contributing to a cleaner, healthier world
environment for this and generations to come.
System Overview
This vehicle is equipped with a Diesel Exhaust Fluid
(DEF) injection system and a Selective Catalytic Reduc-
tion (SCR) catalyst to meet the emission requirements.
The DEF injection system consists of the following com-
ponents:
• DEF tank
• DEF pump
• DEF injector
• Electronically-heated DEF lines
• DEF control module
• NOx sensors
• Temperature sensors
• SCR catalyst 4
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