The Kenworth T680 on-highway flagship and Kenworth T880 and T880S vocational trucks are now available for order with the Cummins Westport ISX12N Near Zero NOx emissions natural gas engine.
The ISX12N is certified by both the U.S. Environmental Protection Agency and California Air Resources Board (CARB). The engine meets CARB’s optional low NOx standard of 0.02 g/bhp-hr, which represents a 90 percent reduction from engines operating at the current EPA NOx limit of 0.2 g/bhp-hr.
“The Cummins Westport ISX12N provides an excellent, very low-emissions solution for fleets and truck operators that order the KenworthT680, T880 and T880S for service in line haul, regional haul, vocational and refuse applications,” said Kurt Swihart, Kenworth marketing director.
Kenworth reports that in addition to offering ultra-low emissions, the ISX12N engine features a closed crankcase ventilation system, unique maintenance-free three-way catalyst, on-board diagnostic capability, and engine control module with excellent durability.
The Kenworth T680, T880 and T880S offer the 12-liter ISX12N with ratings up to 400 hp and 1,450 lb-ft of torque. The engine can operate on compressed natural gas (CNG) and liquefied natural gas (LNG), as well as renewable natural gas (RNG), which offers additional reductions in GHG emissions. RNG is produced from the decomposition of organic waste from such sources as dairy farms, landfills, and urban waste treatment plants.