Filling out Cummins’ on-highway engine line, the ISX11.9 diesel has been certified as meeting both the Environmental Protection Agency (EPA) and California Air Resources Board (CARB) emissions standards for 2010. Full production of the new engine, which is intended for heavy-duty vocational applications, will begin in August at Cummins’ Jamestown Engine Plant, according to the company.
A replacement for the ISM, the ISX11.9 uses selective catalytic reduction (SCR) aftertreatment to reach the EPA’10 requirements on oxides of nitrogen (NOx) and particulate matter (PM) emissions. It shares a number of components with the larger ISX15, including a cooled exhaust gas recirculation (EGR) system, a single variable geometry turbocharger, and the company’s proprietary XPI fuel system, according to Cummins.
The compact heavy-duty diesel is intended for a wide variety of vocational applications such as dump, refuse, mixer, and fire trucks, as well as tanker and day-cab tractors, according to Cummins. It will be offered in power ratings from 310 to 450 HP with peak torques ranging from 1150 to1650 lb-ft depending on the application. Optional features include single- and dual-cylinder air compressors, and both front and rear engine power take-off.