Cummins Westport will begin producing the ISB6.7 G, a 6.7-liter dedicated natural gas engine for medium-duty trucks, shuttle buses, and vocational vehicles by the middle of 2016.
The ISB6.7 G is based on the Cummins ISB6.7 diesel engine platform and will operate exclusively on natural gas – either compressed natural gas or liquefied natural gas. The engine is currently in field trials and will have a range of ratings of up to 260 hp and 660 lb.-ft. of torque and automatic transmission capability that can be specified to customer and OEM requirements.
The engine uses Cummins Westport’s proprietary spark-ignited, stoichiometric combustion with cooled exhaust gas recirculation technology. The SEGR technology was first used on the 8.9-liter ISL G engine.
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