Following on the heels of its ISX12 G launch, Cummins says it has begun development of a 15-litre heavy-duty, spark-ignited natural gas engine to meet coming demand for on-highway trucks powered by the cheaper, cleaner and more plentiful fuel.

As with the ISL G and ISL12 G (pictured here), the ISX15 G will be a product of Cummins Westport, its joint venture with Westport Innovations in Vancouver, B.C.

The 12-litre ISX12 G will begin production in 2013 while the 15-litre gas engine is expected to be in limited production by 2014.

The ISX15 G will be based on the  ISX15 diesel engine and will build on the same spark-ignited technology used elsewhere in the Cummins SWestport lineup. A simple, maintenance-free three-way catalyst will be the only required exhaust aftertreatment. The engine will run on compressed natural gas, liquefied natural gas or biomethane.

Follow Cummins on Twitter and YouTube.

Have your say

We won't publish or share your data