Cummins ISX12 increases fuel economy

Cummins Inc announced its ISX12 heavy-duty engine with fuel economy improvements for regional haul, vocational, and specialty applications. The ISX12 leverages the strength and performance of its predecessor, the ISX11.9, to deliver fuel economy improvements of up to 5% in regional haul applications and as much as 12% in vocational applications.

Featuring better pulling power, excellent driveability, and strong clutch engagement torque, the ISX12 is designed to work in rigorous duty cycles, including those for work trucks such as dump and mixer trucks, and refuse applications. Additionally, full suites 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.

ISX12 uses common components with the ISX15 big-bore engine, including an enhanced cooled exhaust gas recirculation (EGR) system, a single VGT turbocharger, and the XPI fuel system. Like the line of on-highway heavy-duty and MidRange engines, the ISX12 uses Cummins aftertreatment system with selective catalytic reduction (SCR) technology.

The ISX12 has a full power range suited for regional hauling and LTL distribution operations, with standard ratings ranging from 310 to 425 hp (231-317 kW) and SmartTorque ratings ranging from 330 to 425 hp (246-317 kW). SmartTorque ratings unleash higher torque in the two top gears so drivers can climb steep hills with fewer downshifts. For vocational applications, the ISX12 provides a high power-to-weight ratio and 800 lb-ft of clutch engagement torque. Eight vocational and five refuse ratings are available, along with integrated Rear Engine Power Take-Off (REPTO), Front Engine Power Take-Off (FEPTO), and a choice of hydraulic drive options.

The ISX12 will be in full production in March 2012.

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