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The Cummins Particulate Filter helps engines meet 2010 emissions standards without additional aftertreatment.
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Cummins' mid-range and heavy-duty engines that meet 2010 EPA emissions standards also meet new idling requirements while reducing noise levels. "These engines are about 30% quieter than their predecessors," said Dave Crompton, Vice President and General Manager, Cummins Midrange Engine Business.
The revamped lines should at least match operating parameters of vehicles that are now shipping. "We're confident we can stay at 2007 fuel economy levels," said Steve Charlton, Cummins Executive Director of Heavy-Duty Engineering. Performance levels should remain consistent, he added.
Mid-range engines for medium-duty truck, bus, and specialty on-highway vehicles will use selective catalytic reduction (SCR), combining urea and a catalytic converter to reduce NOx emissions.
"SCR enables us to extend our power range while maintaining excellent fuel economy, maintenance intervals, and overall low cost of ownership," said Crompton. Cummins has used SCR in its mid-range Euro 4 engines in Europe since 2006.
Replenishing the urea supply should be simple. OEMs will typically provide tanks that hold enough urea to match conventional maintenance periods. "Operators should be able to replenish urea at oil change intervals," said Jeff Jones, Cummins Vice President of Sales.
Heavy-duty 2010 engines will not require SCR for NOx aftertreatment, instead using an integrated system comprised of the XPI high-pressure common rail (HPCR) fuel system, cooled exhaust gas recirculation, advanced electronic controls, and the Cummins Particulate Filter, which includes both a diesel oxidation catalyst and a diesel particulate filter.
The XPI HPCR fuel system, designed and produced by the Cummins-Scania joint venture, maintains high injection pressures regardless of engine speed, providing consistent performance across the entire rpm range while reducing emissions. The Cummins Particulate Filter, which began shipping in 2007, is the only aftertreatment needed in 2010.
The heavy-duty ISX, ISM, ISL, ISC, and ISB engines will all meet the California Air Resources Board's idle reduction regulation, which requires automatic shutdowns after idling for 5 min. Alternatively, engines can emit 30 g (1 oz) or less of NOx per hour while idling.
Cummins' 2008 on-highway engines emit less than 30 g of NOx per hour so they can idle indefinitely. "This capability provides flexibility for customers who occasionally need to idle more than 5 min," said Jones.
Cummins also announced that it will introduce 11.9-L and 16-L engines, broadening its offering to its North American portfolio for 2010 beyond the currently available 15-L engine. That move comes as Cummins is rapidly expanding its production capability.
Its North Carolina plant was recently upgraded from 550 to 750 engines per day, while a joint venture with India's Tata recently doubled capacity to 230,000 per year. "Our goal for 2011 is to produce 1.6 million engines per year," said Jim Kelly, President of Cummins Engine Business.
Terry Costlow