EGR Is the Next Thing to Worry About
Exhaust Gas Recirculation. Learn the term, if you don’t know it already, because of all the new emissions technologies being discussed, EGR looms closest.
By Oct. 1, 2002, most domestic makers of medium- and heavy-duty diesels will apply EGR apparatus to their products to meet the next round of emissions standards mandated by the Environmental Protection Agency.
EPA’s next lowering of the limits, and thus the need for EGR, is actually scheduled for January 2004. That is when nitrogen oxides, or NOx, are to be lowered from the current 4 grams per brake horsepower/hour to 2.5 grams of both NOx and carbon monoxide. But builders that signed a consent decree with EPA in late 1997 are required to meet the 2004 limits 14 months sooner.
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Builders say EGR gear will include more complex turbochargers, plus valves, sensors, coolers and piping. These will weigh about 50 pounds per system and cost many hundreds of dollars per truck.
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For the full story, see the Dec. 18 print edition of Transport Topics. Subscribe today.
