Cummins Westport ISL-G Near Zero engine available on select Peterbilt trucks

Peterbilt Motors Company is making available the Cummins Westport ISL-G Near Zero NOx emissions natural gas engine on Model 567, 520 and 320 trucks, the company announced Tuesday.

The ISL-G Near Zero engine uses a unique three way catalyst in the after-treatment, advanced engine calibration and a closed crankcase ventilation system (CCV) to achieve emissions that the company says are 90 percent lower than the current EPA NOx limit.

The new engine’s 320 horsepower and 1,000 lb-ft torque match the current generation ISL-G, and like the current model the ISL-G Near Zero operates fully on natural gas, which can be carried on the vehicle in either compressed (CNG) or liquefied (LNG) form. The new ISL-G Near Zero can also run on renewable natural gas (RNG).

The Cummins ISL-G Near Zero emissions engine will become available for production in Models 520 and 320 by year-end. The new engine will become available in the Model 567 in early 2017, Peterbilt adds.