New Cummins High Speed Diesel Engine Series Announced

By Keith Henderson at November 03, 2011 08:07
Filed Under: Company News

Cummins is introducing a new high power diesel engine series to augment their range above the present QSK60 rated to 1,500 hp (2,013 kW). The new series will comprise of V12, V16 and V20 engines of 71, 95 and 120 liter displacement respectively for a number of applications including marine propulsion and marine auxiliary, including gensets. Launch model is the V16 QSK 95 rated at 4,000 hp (2,985 kW) at 1,800 rpm. The second engine in the series to reach production will be the V20 cylinder QSK120 with an output of 5,000 hp (3,728 kW): the V12, as yet not defined, possibly QSK71, will have a power in the region of 3,000 hp (2,237 kW).

The series has a high specification for reliability durability, economy and low emission delivering low through life cost for the engine.

The engine block is of ductile iron and the extended skirt design provides added strength together with an internal bedplate for rigidity and vibration reduction.

This type of engine will be rebuilt several times throughout its life and the single-piece forged-steel pistons with three piston rings as well as providing exceptional durability have a reuse capability at rebuild. Cylinders feature dual piston cooling nozzles, contributing to lower piston ring temperatures and reduced wear.

To improve fuel efficiency and stability at idle as well as reducing noise and eliminating visible smoke across the operating range, the Modular Common Rail System (MCRS) fuel injection has been upgraded to a next-generation design with up to 32,000 psi (2,200 bar).

The new QSK95 uses a similar quad-turbocharger system to that of the QSK60, whereby one turbo supplies a bank of four cylinders. This gives step-load acceptance and transient response with the simplicity of single-stage operation

Electronic control and monitoring of the engine is by four Electronic Control Modules (ECMs), one for each engine quadrant of four cylinders and are grouped together for easy access at the front of the engine in a protected cover.

The new series is compliant with present and future emissions regulations, including EPA Tier 4, taking effect in 2015. It uses a Selective Catalytic Reduction (SCR) aftertreatment designed by Cummins to replace the exhaust muffler. Depending on the duty-cycle, the Cummins SCR system is capable of achieving fuel savings of 5 to 10 percent, together with a significant reduction in carbon dioxide (CO2) emissions.


Caption: Marine version of the new series V16 cylinder
QSK 95 rated at 4,000 hp (2,985 kW) at 1,800 rpm.
Image Credit: Cummins Inc.

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