Heavy Duty ISX12 G Natural Gas Engine Targets Regional Trucking, Vocational and Refuse Markets in North America
Westport and Cummins Agree on New Focus for CWI
Cummins Westport Inc. (CWI), a joint venture of Cummins Inc. and Westport Innovations Inc., has developed a 12 litre heavy-duty, factory built dedicated natural gas engine for regional haul truck / tractor, vocational and refuse applications. The new ISX12 G is currently in field trials with full production expected to commence in early 2013. Based on the Cummins ISX12 diesel engine platform, the newest member of Cummins heavy duty engine family, the ISX12 G will operate exclusively on natural gas (CNG or LNG) utilizing 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 ISX12 G 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. The ISX12 G will be manufactured in Cummins’ heavy-duty engine plant in Jamestown, 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 ISX12 G target markets at launch are 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.
The ISX12 G is expected to be certified at launch to meet the U.S. Environmental Protection Agency and California Air Resources Board emission standards of 0.20 g/bhp-hr NOx and 0.01 g/bhp-hr PM. The engine is additionally expected to be capable of meeting EURO VI and pending U.S. greenhouse gas and fuel economy regulations.
Partial funding in support of the ISX12 G engine development has been received from the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) and the California Energy Commission in conjunction with the Gas Technology Institute.
New Focus for CWI
CWI has entered into an amended and restated joint venture agreement (JVA) with Cummins Inc. for the Cummins Westport Inc. (CWI) joint venture. The JVA was amended to provide for, among other things, clarification concerning the scope of products within CWI. In addition, the parties have revised certain economic terms of the JVA. The joint venture will now have a term of ten years.
“Over the past 10 years, CWI has emerged as the pre-eminent supplier of high performance natural gas engines for commercial vehicles,” said David Demers, CEO of Westport Innovations. “With this new agreement, we have taken the necessary steps to provide CWI with a platform for continued growth and success over the next 10 years, while recognizing the dramatically increased interest in natural gas as a fuel.”
Under the prior JVA, CWI had a global exclusive right to design, engineer, and market mid-range on-road spark-ignited natural gas engines based on Cummins diesel engines manufactured in Cummins facilities. Cummins and Westport have agreed in the amended and restated JVA to focus CWI’s future product development on North American markets including engines for on-road applications between the displacement range of 5.9 litres through 12 litres, and to have these engines manufactured in Cummins North American plants.
(This article compiled using information from Cummins Westport Inc. press releases)
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