Cummins Westport Debuts Heavy-Duty Natural-Gas Engine: 400 HP, 1,450 LB-FT

Cummins Westport Inc. has introduced a new heavy-duty and factory-built natural-gas engine for regional haul truck, tractor, vocational and refuse applications.

The new engine, called the ISX12 G, is 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' proprietary spark-ignited, stoichiometric combustion with cooled exhaust gas recirculation technology.

The ISX12 G features three-way catalyst after-treatment, which is packaged as a muffler and is maintenance free, the company explains, adding that no diesel particulate filter or selective catalytic reduction after-treatment is required.

According to Cummins, preliminary specifications include a ratings of 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, N.Y. It is currently in field trials, and full production is expected to commence early next year.

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