Most Powerful High-Speed Diesel Engine In Industry
In New High-Horsepower Platform For Diesel And Gas
Cummins Inc. (NYSE: CMI) today revealed at the Seymour Engine Plant the
new QSK95 engine with over 4000-hp (2983 kW) output as the world's most
powerful high-speed diesel. The 95-liter 16-cylinder QSK95 is the first
engine to be introduced in a new high-horsepower diesel and gas platform
from Cummins. The new product line will extend up to the 120-liter
20-cylinder QSK120, capable of over 5000-hp (3728 kW) output.
Designed with exceptional strength and high power density, the
16-cylinder QSK95 exceeds the power output of other large 1800-rpm
high-speed engines with 20-cylinders. Compared with much larger
medium-speed engines operating below 1200 rpm, the QSK95 offers a far
more compact and cost-effective solution to achieve the same power
The QSK95 is ideally suited for high-hour, high-load applications in
passenger and freight locomotives, many types of marine vessels and
ultra-class mine haul trucks. Operators can expect higher levels of
equipment uptime and a longer life-to-overhaul with the QSK95.
For power generation applications, the QSK95 meets the need for highly
dependable, fuel-efficient performance. For offshore oil and gas
platforms, the QSK95 will be available as a ready-to-install drilling
power module. The QSK95 will power the new C3000 Series genset from
Cummins Power Generation, providing a class-leading 3.5-MW high-speed
For all applications, the QSK95 is ready to meet the most stringent
emissions standards, including EPA Tier 4 Final, taking effect in 2015,
using proven Selective Catalytic Reduction (SCR) aftertreatment designed
by Cummins to replace the exhaust muffler.
"Our new QSK95 represents a landmark in the evolution of the large
high-speed diesel engine, designed with the power and durability to
surpass all other high-speed engines while also challenging much larger
and higher capital cost medium-speed engines," said Mark Levett, Cummins
Vice-President and General Manager - High-Horsepower Business.
"The QSK95 moves Cummins into a significantly higher power class, and we
know that many of our customers have been eagerly anticipating us making
that move. During the development of the QSK95, we engaged with hundreds
of potential users to ensure that we fully reflected their operational
and installation needs.
"That's why we purpose-designed the QSK95 to set standards of uptime
availability and in-service reliability higher than those of any other
engine - because our customers see that as a top priority for their
"We are excited to introduce the QSK95, as this is just the start of a
new high-horsepower platform for both diesel and gas, covering 12, 16
and 20 cylinders. The gas engines will not be just a derivative of the
diesel engines, but uniquely designed for gas. We will release more
details about our gas product line during 2013," added Levett.
The QSK95 is pre-engineered to add four cylinders and will achieve over
5000-hp (3728 kW) with the QSK120 engine, moving the boundaries of
high-speed diesel performance even further ahead. The QSK120 will
utilize the same architecture and systems as the QSK95, providing the
advantage of platform commonality.
Cummins has committed major resources to the new QSK95 and the
high-horsepower platform, with 150 engineers working on the project and
over $100 million invested to establish a new production line and
world-class test facilities at the Seymour Engine Plant.
QSK95 Analysis-Led Design
The QSK95 has been developed using state-of-the art analytical tools,
including highly advanced combustion modeling. Jim Trueblood,
Vice-President - Cummins High-Horsepower Engineering, explains:
"Using powerful analysis programs, we evaluated thousands of possible
combustion designs until we arrived at the optimum formula for fuel
efficiency, performance, emissions control and power cylinder durability
before cutting any metal for the QSK95.
"The QSK95 is designed with immense strength at the heart of the engine,
enabling the power cylinder to achieve higher levels of peak cylinder
pressure. This gives a higher threshold in-cylinder to focus on
emissions reduction and improve fuel efficiency.
"A key achievement of our combustion analysis-led work is that the QSK95
makes no performance compromise to meet very low emissions standards -
an advantage that few, if any, other large high-speed or medium-speed
engines will be able to claim for Tier 4," added Trueblood.
Using Proven Performance Systems
While the QSK95 is an all-new platform, the engine has been able to take
advantage of proven performance systems from within Cummins
high-horsepower technology portfolio.
A quad-turbocharger system brings highly reliable air-handling direct
from the QSK60 engine to the QSK95. The four compact turbochargers
provide outstanding step-load acceptance and transient response with the
simplicity of single-stage operation.
The Modular Common-Rail System (MCRS) is upgraded to a next-generation
design with up to 2200-bar high-pressure fuel injection. MCRS achieves
high fuel efficiency, reduces noise, offers smooth idle stability and
eliminates visible smoke across the operating range.
Cummins new NanoNetTM fuel filtration gives superior fuel
cleanliness and enhances the durability of the MCRS system - an
important advantage for engines required to operate anywhere in the
world with varying fuel quality.
Deep Structural Strength
A new ductile iron block and an extended block skirt ensure the highest
possible structural strength for the QSK95, improving its capability for
multiple overhauls. An internal stiffening bedplate minimizes vibration.
A single-piece forged-steel piston provides exceptional durability and
reuse capability at rebuild. All three piston rings use premium
materials, with the top ring Plasma Vapor Deposition (PVD)-coated. The
hardened power cylinder features midstop cylinder liners and dual piston
cooling nozzles, contributing to reduced piston ring temperatures and
increased wear resistance.
The stronger engine design of the QSK95 means more reliability
in-service and less to rebuild at engine overhaul, considerably reducing
total life cycle costs. The QSK95 will provide an exceptionally long
life-to-overhaul, capable of achieving 1.7 million gallons and above of
fuel consumed before overhaul, with the significant advantage of no
mid-life intervention required.
Meeting Ultra-Low Emissions Standards
The SCR aftertreatment system is purpose-designed for the QSK95 to
provide a highly flexible, installation package for Tier 4 Final and
similar ultra-low emissions standards. Design space remains available
within the aftertreatment system configuration for additional
Particulate Matter (PM) reduction technology if required for specific
Depending on the duty-cycle, the Cummins SCR system is capable of
achieving fuel savings of 5 percent to 10 percent, together with a
significant reduction in carbon dioxide (CO2) emissions. The
SCR fuel savings are incremental to those already realized by the
high-pressure fuel system, reducing the cost of operation by more than
the cost of Diesel Exhaust Fluid (DEF) required for the SCR system.
By using Cummins SCR aftertreatment solution, the QSK95 avoids the need
for an Exhaust Gas Recirculation (EGR) system on the engine to reduce
Oxides of Nitrogen (NOx). This EGR-free approach avoids the inherent
complexity of applying it to high-output engines and means that no
compromise is made to serviceability. A further advantage is that no
additional heat rejection is generated by the engine, avoiding both an
installation cost and space impact.
Increased Uptime And Serviceability
The QSK95 is designed with more inherent reliability to ensure the
highest possible uptime availability. The engine is configured to
provide faster and easier servicing procedures, with simple access to
all cooling, oil and fuel system maintenance points on the engine.
Service intervals are a minimum 500 hours, with the option of
much-extended oil change intervals available using the ELIMINATORTM
oil purification system, mounted on the engine.
The goal of a leak-free engine is achieved by premium "press-in-place"
seals on all critical joints, such as flywheel housing, gear housing and
oil pan-to-cylinder block. A special perimeter seal to the cylinder head
guarantees that airborne debris cannot penetrate this important sealing
Four standardized Cummins Electronic Control Modules (ECMs) provide a
high level of processing power and memory to monitor, control and
protect the engine systems. One ECM monitors each engine quadrant, with
all four ECMs grouped together for easy access at the front of the
engine in a protected cover. An easy interface provides access for full
About Cummins Inc.
Cummins Inc., a global power leader, is a corporation of complementary
business units that design, manufacture, distribute and service engines
and related technologies, including fuel systems, controls, air
handling, filtration, emission solutions and electrical power generation
systems. Headquartered in Columbus, Indiana (USA), Cummins employs
approximately 40,000 people worldwide and serves customers in
approximately 190 countries and territories through a network of more
than 600 company-owned and independent distributor locations and
approximately 6,000 dealer locations. Cummins earned $1.0 billion on
sales of $13.2 billion in 2010. Press releases can be found on the Web
at cummins.com or cumminsengines.com. Follow Cummins on Twitter at http://twitter.com/cumminsengines
and YouTube at http://youtube.com/cumminsengines.
Note to editor: QSK95 photographs can be downloaded at http://cumminsengines.com/press.
Kevan Browne, 44 7718 581313