Volvo Trucks North America and Mack Trucks announced that their diesel engines have been certified by both the U.S. Environmental Protection Agency and the California Air Resources Board to meet 2010 near-zero emissions standards. Both truck makers are using selective catalytic reduction (SCR) to bring nitrogen oxides (NOx) emissions down to EPA 2010 levels. The engine receiving EPA and CARB certification were Volvo’s D11 and D13 engines, and Mack’s MP7 and MP8 engines.
Volvo says it has extensive experience with SCR technology, having accumulated 5 million miles with 50 test vehicles in customer field test fleets in North America, as well as billions of miles of real-world experience in other markets. The new SCR system was added to the Volvo engine platform used in North America since 2007.
Mack tested SCR in North America customer fleets for more than two years, accumulating 5 million miles of field testing. The technology enabled Mack to use the MP series without major modifications to the engines or cooling systems. SCR also permitted Mack engineers to retune the MP engines for additional power, lower heat rejection and reduced fuel consumption.