The 2016 ISB6.7 G is a 6.7-liter MidRange, factory-built, dedicated natural gas engine, and is being introduced to the Type C School bus market at the North American School Bus Show. It is based on the Cummins ISB6.7 diesel engine platform, leader in the Cummins MidRange engine family and in the school bus market, and is fueled by CNG, LNG or biomethane.
The new engine features Cummins Westport’s proprietary spark-ignited, stoichiometric combustion with cooled Exhaust Gas Recirculation (SEGR) technology. Currently in field trials, the ISB6.7 G will be in full production by mid-2016. Another important feature of the ISB6.7 G is Three-Way Catalyst (TWC) aftertreatment, which is packaged as a muffler, and is maintenance-free. No Diesel Particulate Filter (DPF) or Selective Catalytic Reduction (SCR) aftertreatment will be required.
Preliminary specifications include a range of ratings up to 260 hp and 660 lb-ft torque, and automatic transmission capability, to meet customer and original equipment manufacturer (OEM) requirements. The ISB6.7 G will be manufactured at the Cummins Rocky Mount Engine Plant in Whitakers, N.C.
“We are pleased to display the ISB6.7 G to pupil transportation professionals from across the United States and worldwide here at the STN Expo,” said Rob Neitzke, President of Cummins Westport. “The ISB6.7 G is the natural choice for Type C school bus customers desiring clean, quiet and safe operations with diesel-like power and performance.”