Cummins Westport extends natural gas engine to medium-duty trucks
Cummins Westport Inc (CWI) has doubled the potential market of its 6.7 litre mid-range natural gas (NG) engine, called ISB6.7 G, by making it available for medium-duty trucks and vocational applications. The ISB6.7 G engine has been used in Thomas Built Buses since May, and produces NOx emissions 50% lower than the current Environmental Protection Agency and California Air Resources Board threshold of 0.2 g/bhp-hr. The ISB6.7 G also meets the 2017 EPA greenhouse gas emission levels.

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