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Mack, Volvo take EGR route to cleaner air

Mack Trucks Inc and Volvo Trucks North America announced that they will use engine technology based on exhaust gas recirculation (EGR) to meet new federal diesel engine emissions regulations scheduled to take effect in 2007.

The company also confirmed that its EPA '07 system would include a diesel particulate filter system to achieve reductions in particulate matter called for in the new regulations.

The announcement ends speculation about which system the company would employ in North America. The other major choice, Selective Catalytic Reduction (SCR), is becoming the standard in Europe.

Cummins, Caterpillar, and International have already made known their intentions to use various forms of EGR systems for North American markets.

“We haven't abandoned SCR research in Europe,” a Mack spokesperson said. “EGR is the best solution for North America when you look at the total picture. We have not closed the door on SCR. One day it may be viable for North America.”

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