Peterbilt Motors Co. will now offer 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, according to the company, through the introduction of a unique three way catalyst in the after-treatment, advanced engine calibration and a closed crankcase ventilation system (CCV).
“Peterbilt is producing increasingly efficient products,” said Scott Newhouse, Peterbilt’s chief engineer. “The addition of the ISL-G Near Zero emissions engine strengthens Peterbilt as an environmental leader.”
The new engine’s performance and efficiency match the current ISL-G, with 320 horsepower and 1,000 lb./ft. torque available. Like the currently available ISL-G engine, the ISL-G Near-Zero operates on 100% 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 the end of the year, and for Model 567 in early 2017.
