Cummins recently released a new rating of 1864 kW for its Tier 2 QSK50 for well-servicing applications. The powerto-weight ratio, 1864 kW from 5700 kg, is increasingly important as well-servicing equipment is often on trailers or rigs traveling on roads with local or regional weight restrictions. The new rating increases output by 9% from 1715 to 1864 kW at 1900 r/min.

The QSK50 has taken the base engine and enhanced it with the Quantum System electronics and modular common rail fuel system. These performance and technology upgrades ensure not only EPA Tier 2 emissions compliance, but also quieter operation, better fuel economy,smoother power delivery and better idle stability, according to Cummins. The QSK50 engines share 70% of their parts with their corresponding predecessors.

Cummins also announced that almost 3000 QSK Series mining engines certified to EPA Tier 2 low-emissions regulations are in service with haul trucks, excavators,loaders, drill rigs and other equipment.The Tier 2-certified QSK engine range extends from 19 to 78 L across a 567 to 2610 kW power band. The compliant engines reduce particulate matter emissions by over 60% compared to Tier1, with oxides of nitrogen and hydrocarbon emissions reduced by nearly 38%. Cummins has also upgraded the QSK60 marine engine for propulsion and auxiliary applications to meet U.S.

EPA Tier 2 and European Union Stage IIIA emissions regulations. With propulsion ratings from 1492 to 1864 kW and auxiliary ratings from 1563 to 1900 kW,the QSK60 Tier 2 is designed for highhour demanding applications such as offshore support, towing, cargo and passenger transport, as well as ship’s service power. The QSK60 will be built and marinized at Cummins Engine Co. Ltd. in Daventry, U.K.

The 60 L, Vee-configuration, 16-cylinder engine utilizes the Cummins modular common rail fuel system (MCRS).

The MCRS provides constant high injection pressure regardless of engine speed or load conditions, which improves idle stability while reducing engine noise and vibration for quiet operation. Quantum System electronics are driven by an electronic control module (ECM).

C Command instrument panels,part of the Cummins Electronic Information System (EIS) product line,include a selection of monitoring and display options that help operators protect and enhance engine operations and manage operating costs by logging critical operating parameters such as enginelload, duty cycle, speed and fuel consumption,while providing diagnostic and prognostic capabilities. A common point of connection in the customer interface box simplifies the link between engine electronics and vessel systems.

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