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Making EGR-only work for 2010

Published Monday, November 10, 2008

The key to cutting NOx emissions in a diesel engine’s cylinder without increasing the amount of particulate matter (PM) generated is to raise fuel injection pressures greatly at engine speeds as low as 800 rpm, according to Tim Shick, Navistar director of business and product strategy. It has been generally accepted that raising the amount of exhaust gas recirculation (EGR) will lower NOx creation by lowering combustion temperatures within the cylinder, but increase PM or soot emissions because it would also leave large amounts of fuel unburned. Navistar’s non-SCR approach to the next level of emissions requirements will ...

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