Engine-maker Cummins Inc. announced that its medium-duty engines meet federal 2014 greenhouse gas limits. Truck manufacturers Volvo Trucks and Mack Trucks Inc. also announced that their trucks will comply with the regulations.
Cummins, which said in October that its 15-liter ISX15 engine had become the first engine to receive approval, announced that the rest of its lineup is now in compliance.
“Every single one of them from the ISX15 to the ISX12, ISL9 and the ISB6.7 is now certified,” Carol Lavengood, marketing and communications director for Cummins’ engine business, told Light & Medium Truck.
The greenhouse-gas rule was written by the Environmental Protection Agency and the National Highway Traffic Safety Administration to address the emissions of carbon dioxide and other greenhouse gases by heavy- and medium-duty trucks. The August 2011 rule sets standards for emissions and mileage.
The greenhouse-gas rule sets standards for trucks and engines made from January 2014. The rule’s second-stage standards kick in as of 2017.
To get the engines ready, Cummins made changes that would reduce parasitic losses.
“Around the water pump, fuel pump and oil ring, we made the hardware modifications that would improve the overall efficiency of the engine,” Lavengood said. “We expect about a 2% improvement in fuel efficiency.”
Volvo, meanwhile, said it has received certification for its VNL, VNM, VHD and Volvo Autohauler (VAH) models.
“Volvo is committed to leadership in fuel efficiency and to reducing the carbon footprint of our operations and products,” said Göran Nyberg, president of Volvo Trucks North American Sales and Marketing.
To achieve certification, Volvo Trucks said, it improved vehicle aerodynamics, including tweaking mirror heads, redesigned hood mirrors and more features below the bumper and side fairings.
“They’re giving us the leeway to be very good in some areas,” Frank Bio, Volvo’s product manager of trucks, said in a telephone interview from the company’s Greensboro, N.C., base. “The intent is to improve the overall trucking fleet rather than use dirty engines or things not aerodynamic.”
Likewise, Mack said its full lineup of model year 2014 trucks and tractors had been certified by EPA and NHTSA.
The company said the primary changes under the hood involved engine tuning or fuel map settings. Other changes were made in tire selection — a greater focus on low rolling-resistance tires — and aerodynamic options.
Volvo Trucks is a division of Volvo Group, based in Gothenburg, Sweden, that also owns Mack Trucks Inc.