15-8
4. Diesel Particulate Filter
• Diesel particulate filter is a large-ca-
pacity system consisting of an ultra-ef-
ficient oxidation catalyst and a filter.
Diesel particulate filter is designed to
efficiently break and capture PM emit-
ted by engines running on low-sulfur
fuel, and the filter is continuously re-
generated.
• The new environmentally-friendly en-
gine has drastically-reduced PM emis-
sion levels. In addition, the ultra-
efficient oxidation catalyst breaks and
treats most of PM emitted from the en-
gine, minimizing PM loading/deposit
onto the subsequent filter. As a result,
the filter is unlikely to clog up even un-
der the driving conditions that require
long hours of drive with relatively low
exhaust gas temperature. Also, active
regeneration, which increases fuel
consumption, is not required.
• The size of the filtration openings has
been optimized to eliminate the de-
posit of ash (product of combustion)
generated in the engine. The filter re-
quires no maintenance, including peri-
odical cleaning.
STRUCTURE AND OPERATION
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