19 September 2001

Detroit Diesel Corporation (DDC) announced that it will continue to provide a full line of ratings for the 2002 Series 60 engine. Approximately 95% of all current ratings will be available on 1 October 2002. The remaining ratings will be further developed to meet new emission standards on a priority basis according to demand. The standard maximum engine speed will remain at 2100 rpm.

Beginning 1 October 2002, DDC and a number of other heavy duty engine manufacturers in North America are required to supply engines meeting the 2004 emission standards. Compliance with the 2004 standards 15 months ahead of time was part of the Consent Decrees signed in 1998 between several engine manufacturers and the US EPA and DOJ.

The 2004 regulation introduces a combined emission standard of 2.4 g/bhp-hr of NOx + NMHC (or about 2 g of NOx), down from the current 4 g of NOx and 1.3 g of HC. DDC engines will utilize cooled EGR technology as the main strategy to control NOx emissions.

DDC said, at this time the fuel economy of 2002 Series 60 engines is in a range of 2 to 4% less than current engines. There is still one year of development time, during which DDC will attempt to improve fuel economy until any difference compared to current ratings is insignificant. Soot loading of the lube oil in the new engines, once considered to be a potential problem, is in line with current production engines.

In addition to the cooled EGR, the new Series 60 engines feature overhead camshaft design allowing for high injection pressures, as well as advanced turbocharger technology. DDC first began using EGR and the advanced turbo about a year ago in engines for the transit bus market. By October 2002, approximately 3,500 of these engines will be running throughout the US & Canada.

Source: Detroit Diesel Corporation