Heavy-duty hybrid

The term “hybrid vehicle” typically brings to mind small, oddly shaped passenger cars like Toyota's Prius, not a beefy 64,000-lb. truck. Yet that's what the Mack Trucks division of Sweden's Volvo Group is delivering to the U.S. Air Force: a prototype Granite dump truck that sports an electric motor paired with a 365-hp. diesel engine. It's equipped with what the OEM calls “ultra-capacitors” instead of massive batteries to boost fuel economy anywhere from 30% to 35%. By burning less fuel, there are emissions benefits as well. It's the latest in a line of six heavy-duty hybrid truck models ...

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From the Print Issue

November 2009

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