research and development specialist
Ricardo, using computational fluid
dynamics, finite element analysis and
a Ricardo-designed combustion bowl
to improve the combustion process.
With second-generation common
rail fuel injection technology, injection pressures have been raised to
29,000 psi and nozzle hole geometry
has been refined to provide highly
effective atomization and distribution
of the fuel within the cylinder.
JCB has incorporated variable
geometry turbochargers on all but
the lowest-output 74 hp Dieselmax
engine, which falls under a slightly different emissions regulation.
Cooled exhaust gas recirculation is
also used to clean up the exhaust
gases before they are passed from
the engine. This means that there
is no requirement for any exhaust
aftertreatment components to meet
these emissions levels on the 4. 4 L
JCB Ecomax T4 engine, the company said.
The company said it has also
worked with fuel system and electronics specialist Delphi to develop
an electronic control system with a
form of learning capacity that will
ensure the engine stays within its
intended parameters even as the
components settle throughout their
design life.
Along with no exhaust aftertreatment system, JCB said there has
been no need to increase cooling
package size or to reduce service intervals from the standard
500 hours. In addition, under test
conditions, the engines have been
achieving a 5 to 10% fuel consumption improvement compared to the
previous generation, JCB said.
The engine design is also “
future-proofed,” JCB said, as the structural
architecture, the componentry and
systems will remain the same for
Stage 4/Tier 4 final regulations in the
future, at which time exhaust aftertreatment for NOx reduction may be
unavoidable.
Corporate News
JCB Power Systems said it will
also continue to grow by developing its OEM engine distribution presence around the world, not only with
new appointments in Europe but also
with the rollout of its North American
appointment process, which continues throughout the third and fourth
quarters of 2011.
JOHN DEERE
John Deere Power Systems
P.O. Box 5100
Waterloo, IA 50704-5100
Phone: (800) 533-6446
Fax: (319) 292-5075
E-mail: jdpower@johndeere.com
Web:
www.johndeere.com/jdpower
Contacts
Industrial and Marine Sales:
Geff Burris
Industrial Engineering: James Kaiser
Marine Engineering: Scott Ochsner
Power Range
Industrial Diesel: 48 to 600 hp
Marine Diesel: 75 to 750 hp
Generator Drive Diesel: 48 to 755 hp
New Engines/
Emissions Technology
John Deere Power Systems (JDPS)
has introduced its full lineup of Tier
4 interim/Stage 3b diesel engines.
The engines continue to utilize the
PowerTech Plus Tier 3/Stage 3a platform, which uses cooled EGR for NOx
control and added an exhaust filter for
reducing particulate matter (PM).
In choosing a solution for Tier 4
interim/Stage 3b, John Deere elected
not to use SCR. John Deere said
its cooled EGR and exhaust filter
approach provides OEMs and end
users a proven solution with the best
total fluid economy. The single-fluid
approach of cooled EGR means owners and operators won’t have to incur
continued on page 50
A complete engine range compliant
with Stage 3B and Tier 4i
– still with exceptional fuel
economy, which minimizes the
cost for you and CO2 emissions
to the environment.
VOLVO
POWER
FOR THE
FUTURE
Power Generation 80-600 k We
Electrical power generation
Off-road 129-565 k W
Construction
Agriculture
Materials handling
Compressors
Pumps
Mining
SEE DIRECTLINK WWW.DIESELPROGRESS.COM
