(EnergyAsia, March 16 2012, Friday) — Cummins Westport Inc is completing a factory to build the ISX12 G, a 12-litre heavy-duty natural gas engine for use in long-haul truck, tractor, vocational and refuse applications. 

The new ISX12 G, based on the Cummins ISX12 diesel engine platform, is in field trials with full production expected in early 2013.

The engine will operate exclusively on compressed natural gas (CNG) or liquefied natural gas (LNG) utilising Cummins Westport’s proprietary spark-ignited, stoichiometric combustion with cooled exhaust gas recirculation (SEGR)  technology, first introduced with the 8.9 litre ISL G. The new engine features three-way catalyst aftertreatment, which is packaged as a muffler and is maintenance free. 

No diesel particulate filter or selective catalytic reduction aftertreatment will be required. Preliminary specifications include a range of ratings to 400 hp and 1,450 lb-ft torque, optional engine brake, and manual and automatic transmission capability to meet customer and original equipment manufacturer requirements. 

Cummins Westport said the engine will be manufactured at the Cummins heavy-duty engine plant in Jamestown in New York.

“This is an important product development for Cummins Westport given the increasing demand for natural gas vehicles in the heavy-duty market,” said Roe East, President of Cummins Westport. 

“The ISX12 G will offer customers heavy-duty performance, reliability, and durability and a choice of either compressed natural gas or liquefied natural gas as a fuel.”

The company is targeting to the engine for North American regional haul and vocational truck/tractor, and refuse applications, where demand for natural gas vehicles is growing.  Anticipated end-use applications in the regional haul market segment include intermodal and distribution operation, pickup and delivery.  Potential post-launch market opportunities include motor coach and specialty vocational applications.