FPT said, and actual production will
start in line with Tier 4 final legislation
implementation. All of the company’s
engines will be Tier 4 final compliant,
specifically the NEF Series ( 4. 5 and
6. 7 L engines covering a range of 107
to 308 hp) and the Cursor Series ( 8. 7,
11. 1 and 12. 9 L engines rated from
268 to 690 hp).
Kohler’s newly unveiled Kohler
Direct Injection (KDI) range of 1. 9 and
2. 5 L engines are designed to meet
Tier 4 final emissions requirements
through a range of heavy-duty diesel technologies normally not found
on smaller engines. These include a
29,000 psi electronically controlled
common rail fuel injection system and
cooled exhaust gas recirculation.
Kohler’s new Kohler Direct Injection (KDI)
diesels meet Tier 4 final with no DPF,
thanks in part to a Denso high-pressure
fuel injection system.
The result, the company said, is
more horsepower, improved torque
performance and fuel economy, and
perhaps most significant, no need for
DPF aftertreatment. The KDI diesels
will also be available in mechanical
versions that will target heavy-duty
industrial and construction markets in
regions with lower-grade fuels.
The KDI engines are a clean-sheet
design covering five engines in ratings
from 41. 5 to 74.2 hp. To help optimize
combustion, the cylinder heads incorporate four valves per cylinder with
the injector positioned vertically at the
center of the combustion chamber, a
design that in combination with intake
manifold and combustion chamber
geometry, optimizes fuel atomization
and mixing in the combustion chamber, the company said.
Engine cooling was also a significant development focus, and the
engines incorporate a two-stage
cooling configuration with a charge-air cooler and EGR cooler designed
to optimize heat exchange without
increasing overall size.
Production of the KDI engines
is scheduled to begin early in the
third quarter of this year at Kohler’s
Lombardini engine facility in Reggio
MTU was one of the first off-highway engine manufacturers to embrace
SCR technology and it will continue to
be a linchpin for the company’s construction and industrial (C&I) engines
in meeting Tier 4 final standards.
From 2014, MTU will be introducing
its new Series 1000, 1100, 1300 and
1500 engines with outputs ranging
from 134 to 617 hp and will utilize
SCR with no DPF. The company
said the new engines will offer fuel
economy improvements of up to 5%,
an increase in service life of up to
20% and higher torque at low engine
speeds, when compared with their
Tier 4 interim counterparts.
The program will be extended to
978 hp with the introduction of Series
From 2014, MTU’s Series 1500 will utilize
SCR with no DPF.
1600 engines from 2014, which will
rely on high-pressure common rail
injection, two-stage turbocharging
and cooled exhaust gas recirculation.
MTU placed particular emphasis on
optimizing the combustion process in
order to minimize fuel consumption.
Overall, customers will benefit from
an integrated system with low rebuilding and operating costs.
“We are proud that, in the future,
we will continue to be able to offer
our customers engines without die-
sel particulate filters for all construc-
tion industry applications,” said Dr.
Ulrich Dohle, chief technical officer
of Tognum, MTU’s parent company.
“They are cleaner than ever before
and they use even less fuel than the
The Series 2000 C&I engines for Tier
4 final covers a power range from 752
to 1560 bhp and will meet the emissions
limits through combustion optimization
and in-engine technology enhance-
ments, without the need for aftertreat-
ment, MTU said. The new-generation
Series 4000 C&I engines for Tier 4 final
will be launched in 2015, covering a
range of 1070 to 4020 bhp in 8-, 12-,
16- and 20-cylinder configurations.
Perkins showed its first Tier 4 final
emissions-compliant engine at last
year’s ConExpo, the 400F, which is
the latest addition to its 400 Series
diesel engine range.
With outputs to 61 hp, the 400F diesel has a 97% carry-over of components from the previous Tier 4 interim
engine. Perkins said the only addition
that equipment manufacturers will
see is the aftertreatment, which has
been designed to be as compact as
possible and offers flexible mounting
arrangements to ease installation.
The first of Perkins Tier 4 final diesels to
be introduced is an SCR-equipped model
404F. With outputs of up to 61 hp, the 404F
has 97% of the components of the Tier 4
interim version of the engine.
The aftertreatment uses passive
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