Las Vegas (September 22, 2008) - Cummins Inc. (NYSE: CMI) announced today at the MINExpo show that almost 3,000 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. Cummins Tier 2 engine population is believed to exceed the combined total of Tier 2-compliant engines in service from all other engine manufacturers, positioning the company as the industry clean power leader. 


EPA Tier 2 regulations for engines above 751 hp (560 kW) took effect in January 2006 as the most stringent emissions standards in the world applicable for large surface mining equipment. Cummins Tier 2-certified QSK engine range extends from 19 to 78 liters across a broad 760- to 3500-hp (567-2610 kW) power band.


In terms of installed horsepower, the 3,000 Cummins Tier 2 engines represent a cumulative total approaching four million horsepower in mining equipment. The Tier 2-compliant engines reduce Particulate Matter emissions by over 60 percent compared to Tier 1, with Oxides of Nitrogen and Hydrocarbon emissions reduced by nearly 38 percent.


“Four years ago, back at the previous MINExpo in 2004, we took a lead role in the engine industry by revealing the first lineup of Tier 2-compliant engines well ahead of the EPA emissions effect date for engines above 751 hp,” commented Mark Levett, Cummins Vice President and General Manager, High-Horsepower Business. 


“While other engine suppliers remain at an early point in their Tier 2 introduction, Cummins has moved ahead to establish proven engine performance at the mine site. Equipment manufacturers and mine operators have made Cummins their Tier 2 engine of choice with almost 3,000 units now in service.


“Our Tier 2 success demonstrates that Cummins is uniquely positioned to provide the mining industry with the best value in engine power and is committed to doing so. As the largest independent manufacturer of diesel engines, we have invested in the right technologies – combustion research, fuel systems, air handling, filtration and electronic controls – which means we can deliver the most dependable solution on time with the lowest cost of ownership,” added Levett.


Cummins achieved Tier 2 emissions levels by optimizing the in-cylinder combustion recipe to provide cleaner, more efficient combustion. Performance-enhancing technology such as Cummins Modular Common Rail fuel system was also utilized on the latest generation of QSK19, QSK38, QSK50 and QSK60 engines. As a result, the Tier 2 engines provide more rapid load acceptance, improved idle stability, better cold-starting characteristics and are significantly quieter in operation. The benefits of clean power also result in virtually no visible smoke at rated power output and very low levels of oil consumption.


Tier 2 engine design upgrades to pistons, valve train and air-handling systems have maintained Cummins industry-leading reputation for durability established by their Tier 1 predecessors. As an example, the 2,700 hp (2013 kW) QSK60 Tier 2-compliant engine is capable of achieving an impressive life-to-overhaul exceeding one million gallons (3,785,000 liters) of fuel consumed, depending on duty cycle.


About Cummins

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 serves customers in approximately 190 countries and territories through a network of more than 500 company-owned and independent distributor locations and approximately 5,200 dealer locations. Cummins reported net income of $739 million on sales of $13.05 billion in 2007.