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Industry NewsA New 12 For 12January 23, 2012 Cummins Inc. has announced that it will launch a new on-highway diesel engine targeting regional haul, vocational and specialty vehicle applications. The new ISX12 engine is the successor to the ISX11.9 engine and will provide fuel economy improvements of up to 5% in regional haul applications and as much as 12% in vocational service, the company said. Full production of the engine, which like its predecesor has a displacement of 11.9 L, is planned for March at Cummins' Jamestown, N.Y., heavy-duty engine plant. The ISX12 is an evolution of the previous model in the power range and achieves its improved characteristics through optimized calibrations, Cummins said. Designed to provide improved pulling power, driveability and strong clutch engagement torque, the ISX12 is suited for rigorous duty cycles such as dump and mixer trucks and refuse applications. A wide range of horsepower and torque ratings are available for fire and emergency vehicles, recreational vehicles and motorcoaches as well as regional haul and day cab operations in Class 8 trucks, the company said. Cummins said the ISX12 utilizes common components with the company’s flagship ISX15 diesel, including an enhanced cooled exhaust gas recirculation (EGR) system, a single variable geometry turbocharger from Cummins Turbo Technologies and Cummins’ proprietary XPI high pressure common rail fuel system. Like the complete lineup of on-highway heavy-duty and midrange engines, the ISX12 also utilizes the Cummins Aftertreatment System, the company’s own selective catalytic reduction (SCR) technology. Standard ratings range from 310 hp to 425 hp (231 to 317 kW) with SmartTorque ratings from 330 hp to 425 hp (246 to 317 kW). SmartTorque ratings are designed to provide higher torque in the two top gears so that drivers can climb steep hills with fewer downshifts. For vocational applications, the ISX12 delivers 800 lb.ft. (1085 Nm) of clutch engagement torque. Eight vocational and five refuse ratings are available, along with integrated rear engine power take-off (REPTO), front engine PTO (FEPTO) and a choice of hydraulic drive options.
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