Peterbilt Motors Company introduced the Cummins Westport ISL-G Near Zero NOx emissions natural gas engine for Models 567, 520, and 320.

The ISL-G Near Zero engine emissions are 90% lower than the current EPA NOx limit through the introduction of a three-way catalyst in the after-treatment, advanced engine calibration, and a closed crankcase ventilation system (CCV).

The new engine’s performance and efficiency match the current ISL-G, with 320 hp and 1,000 lb.-ft. torque available. Industries that will most benefit from the new option include linehaul, vocational, and refuse applications.

Similar to the currently available ISL-G engine, the ISL-G Near Zero operates on 100% natural gas, which can be carried on the vehicle as either compressed natural gas (CNG) or liquefied natural gas (LNG). 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.