tier 4 | by Tom Jackson
TJackson@randallreilly.com
Perkins M
Tier 4
DPF-free aftertreatment
package incorporates SCR
technology in Tier 4 Final
Perkins' 1204F
series engines do
not need a DPF to
meet emissions
regulations.
aintenance is
necessary
on any
diesel
engine, but the less, the
better for the owner. To
that end, Perkins has developed a range of four
cylinder power plants
that do not need a diesel
particulate filter (DPF) to
meet Tier 4 Final emissions regulations that go
into effect in 2014.
With their four-cylinder
design and 4.4 liters of
displacement the Perkins
1204F series of engines
offers two versions,
single or twin turbo.
The single turbo models
(1204F-E44TA) put out
147 horsepower, while
the twin turbo design
(1204F-E44TTA) ups that
to 175 horsepower. The
single turbos deliver
improved fuel economy,
power and torque. The
twin turbochargers are
mounted in series for
extra power density, low
speed torque and faster
transient response.
The component that
eliminates the need for
a DPF in both 1204F
models is a diesel
oxidation catalyst/
selective catalytic
reduction (DOC/SCR)
module. This module
is smaller than a DPFbased system would
be, reducing the size
of the engine and
maintaining a compact
profile. It also eliminates
EquipmentWorld.com | February 2013 49
