Kenworth adds Cummins ISX12N as nat gas engine option on T680, T880 and T880S trucks

T880S mixer truck

Kenworth has announced the addition of another Cummins Westport natural gas engine as an available option on three of its trucks.

Customers will now be able to spec the on-highway T680 and the T880 and T880S work trucks with the Cummins Westport ISX12N. The 12-liter engine boasts ratings up to 400 horsepower and 1,450 lb-ft of torque.

“The Cummins Westport ISX12N provides an excellent, very low-emissions solution for fleets and truck operators that order the Kenworth T680, T880 and T880S for service in line haul, regional haul, vocational and refuse applications,” says Kurt Swihart, Kenworth marketing director.

Like the Cummins L9N, made available on these trucks a few weeks ago, the ISX12N is certified to the California Air Resources Board (CARB) optional low NOx standard of 0.02 g/bhp-hr ‒ a 90-percent reduction from engines operating at the current Environmental Protection Agency (EPA) NOx limit of 0.2 g/bhp-hr.

In addition to ultra-low emissions, the ISX12N features on-board diagnostic capability, a maintenance-free three-way catalyst, closed crankcase ventilation system, and a high-durability engine control module.

The ISX12N can operate on compressed natural gas (CNG), liquefied natural gas (LNG) or renewable natural gas (RNG).

RNG is produced from the decomposition of organic waste from sources like dairy farms, landfills and urban waste treatment plants, Kenworth says, and offers further reductions in greenhouse gas emissions over CNG and LNG.