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US engine manufacturers announce technology plans for 2007

16 December 2003

US engine manufacturers announced their technology plans for meeting the 2007 emission standards for heavy-duty diesel engines. While, as expected, all manufacturers will use diesel particulate filters for PM control, there is still no agreement on NOx control methods. Cummins, Caterpillar and International intend to meet the 2007-2009 NOx requirements using technologies similar to those featured in their 2004-complaint engines, which are generally based on various forms of exhaust gas recirculation (EGR). Detroit Diesel Corporation (DDC) on the other hand is still considering the use of urea-SCR technology, the solution which will be used in the European Union from 2005 (Euro IV). Other supporters of the SCR route in the US market—Volvo and Mack—did not issue statements at this time.

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Technology plans announced by manufacturers can be summarized as follows:

All manufacturers will meet the 2007 PM emission standard of 0.01 g/bhp-hr (down from the current 0.1 g/bhp-hr) through the use of diesel particulate filters.