Cummins Launches New Heavy-duty Natural Gas Engine
29 February 2012
www.chinabuses.org：The other day Cummins Westport expanded its product line of natural gas engine for highway and new-developed Cummins ISX12 G engine would be the first heavy-duty natural gas engine in North American market. With CNG or LNG as monofuel, this engine is expected to go into operation in Jamestown plant at the beginning of 2013, used for dumper, tractor, heavy-duty truck, pickup, sanitation truck and mail truck at first, then for tourist bus and school bus. 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.
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.
Source : www.chinabuses.org：
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