Business Development, Tenneco
( tenneco.com ), points out, the
U.S. EPA Tier 3 regulations,
which begin in model year 2017
for passenger cars and model
year 2018 for light trucks (and it
also impacts Class 2 and 3 diesel
pickups), is a "milligram per mile"
standard: "The biggest pickup
is held to the same standard as
the smallest B-segment vehicle
in terms of absolute emissions at
the tail pipe," he says. Previously,
pickups had been measured on
milligrams per horsepower, so
bigger engines had a bigger
emissions window.
Tier 3, Jackson explains, is
about the reduction of "criteria
pollutants," the precursors to
ozone, such as NOx and non-
methane organic gas (NMOG),
as it the aldehydes, ketone, and
alcohols in the exhaust stream.
Remember Tier 2, Bin 8? Well,
if you're familiar with it, then
remember is what you're going
to do when Tier 3 is in full efect.
Right now, Tier 2, Bin 8 is 125
mg/mile of NMOG and 200 mg/
mile of NOx, or a total of 325 mg/
mile. That is going away. As are
Bin 7 and Bin 6. So the highest
level at which an engine can be
certifed is what was once Bin 5,
but it is being split into Bin 160
and Bin 125.
Tier 3, Bin 160 is 90 mg/mile of
NMOG and 70 mg/mile of NOx, or
a 51% decrease from Tier 2, Bin 8.
That's the highest level.
But Jackson points out that
the feet average that is being
required is what has been known
as Tier 2, Bin 2. That's 10 mg/mile
of NMOG and 20 mg/mile of NOx,
for a total of 30 (which explains
the new nomenclature, Tier 3,
Bin 30).
According to Jackson, to get a
feet average to Tier 3, Bin 30—a
92% reduction from Tier 2, Bin 8,
incidentally—if there is one vehicle
at Tier 3, Bin 160, it will be neces-
sary to sell around 13 vehicles
that are at Tier 3, Bin 20 to ofset
that higher emissions number.
AD&P; > July 2014 > FEATURE > Tenneco: Talking About Emissions > Gary S. Vasilash
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