IN THE BAY
Exhaust and emission
aftertreatment
systems explained
34 Fleet Maintenance | November/December 2017
n response to an increasing push for clean diesel
emissions, medium and heavy duty diesel-powered
trucks have adopted complex exhaust or
emission aft ertreatment systems. Th ese systems
treat post-combustion gases aft er they leave the
engine, reducing environmental impact without
sacrifi cing power or performance.
Although aft ertreatment systems have
been used for years now, many fl eets
continue to struggle with maintaining
and repairing these systems. A properly
maintained aft ertreatment system ensures
that emissions are kept at or below
government regulation requirements.
To maximize uptime and minimize
costly repairs, it is helpful for fl eets
to understand how aft ertreatment
systems work so they can better understand
how to maintain them.
Primary components
Th e primary components of a vehicle’s aft ertreatment
system are the diesel particulate
fi lter system (DPF), which reduces particulates,
Aftertreatment systems aff ect vehicle
effi ciency and performance.
I By Stefanie Von Rueden,
Assistant Editor
» Single Module
aftertreatment – the latest
offering for customers to
meet EPA 2017 regulations.
Photo courtesy of Cummins
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