Peterbilt Offers New ISL G Engine
Truck maker Peterbilt Motors Co. will soon offer the Cummins Westport ISL G Near Zero engine as an option on three of its vocational trucks, the Denton, Texas-based manufacturer said Aug. 30.
Peterbilt, a division of Paccar Inc., is using the ISL G Near Zero in its Model 567, a vocational truck, and Models 520 and 320, both low-cab-forward refuse haulers. Near Zero refers to emissions of nitrogen oxide compounds, or NOx, at a level of 0.02 gram per brake horsepower-hour — 90% lower than the current federal standard of 0.2 gram.
The 8.9-liter ISL G uses natural gas, either compressed or liquefied, as truck fuel and is manufactured by a joint venture owned by Cummins Inc. and Westport Innovations.
Peterbilt said the engine produces 320 horsepower and 1,000 pound-feet of torque. Near Zero is the latest version of the ISL G, which has been in production since June 2007.
The company said it will start making Models 520 and 320 with the new engine before Dec. 31. Production for Model 567 with Near Zero will follow early next year.
The ultra-low NOx engine is particularly important in California, where the state government has a program to limit NOx emissions as well as those of carbon dioxide and other greenhouse gases.
“Peterbilt is producing increasingly efficient products. The addition of the ISL G Near Zero emissions engine strengthens Peterbilt as an environmental leader,” said Scott Newhouse, Peterbilt’s chief engineer.
