Cummins Unveils World’s Most Powerful High-Speed Diesel

Cummins Inc. (NYSE: CMI) unveiled 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.

The QSK95 is ideally suited for high-hour, high-load applications in ultra-class mine haul trucks, passenger and freight locomotives, and many types of marine vessels. Operators can expect higher levels of equipment uptime and a longer life-to-overhaul with the QSK95.

“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 business success.”

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 output.

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 output.

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.

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 NanoNet 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.

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 applications.

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.

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