Cummins Westport Inc. has announced a new development program that will yield a 6.7-liter natural gas engine – the ISB6.7 G. Production of the mid-range, on-highway engine is targeted for 2015.
The company says the new natural gas platform, which will be based on the Cummins ISB6.7 diesel engine, will run on compressed natural gas (CNG). However, the natural gas can be stored on the vehicle – e.g., school buses and medium-duty trucks – as liquefied natural gas (LNG) or CNG.
‘The addition of the ISB6.7 G will round out our family of high-performance natural gas engines,’ says Jim Arthurs, president of Cummins Westport. ‘It joins the 8.9-liter ISL G, with over 16,000 engines in service, and the 11.9-liter ISX12 G, which will start production in 2013.’
Cummins Westport says the ISB6.7 G will meet both Environmental Protection Agency and California Air Resources Board regulations when the product launches. It will use Cummins Westport's spark-ignited, stoichiometric cooled exhaust gas recirculation (SEGR) technology – exhaust aftertreatment will be provided by a three-way catalyst.