Mar 19, 2009 11:56 AM

Cummins Inc. (NYSE:CMI) used the Mid-America Trucking Show in Louisville, Kentucky, to unveil its on-highway engine lineup ready to meet the new Environmental Protection Agency (EPA) regulations for the North American market.

Cummins unveiled the ISX15, which will provide better fuel economy, better performance and better reliability compared to today’s ISX engine. The ISX15 features the Cummins XPI fuel system, an enhanced cooled-EGR system, a single VGT Turbocharger and the new Cummins Aftertreatment System that incorporates Selective Catalytic Reduction (SCR) catalyst technology together with the Cummins Particulate Filter that was introduced in 2007.

The ISX15 features the XPI fuel system and a single overhead camshaft for a power-to-weight ratio among big-bore engines. Fuel economy gains of up to five percent will be realized as compared to Cummins 2007 engines, and gains of up to nine percent as compared to competitive 2010 in-cylinder solutions are anticipated. Ratings will be maintained from 400-600 horsepower (298-447 kW), with torque outputs from 1450-2050 lb-ft (1966-2779 N•m).

The new Cummins ISX11.9 engine was also unveiled. The ISX11.9 provides a compact and lightweight medium-bore engine ideal for vocational trucks, day cabs, emergency vehicles and motorcoach applications. Sharing common cooled EGR, VGT Turbocharger, XPI fuel system, electronic controls and aftertreatment system with the ISX15, the ISX11.9 will be offered with ratings from 310-425 horsepower (231-317 kW) and torque from 1150-1650 lb-ft (1559 – 2237 N•m).

The ISX15 will continue to feature the Intebrake, an integrated engine brake; and the ISX11.9 will be offered with an optional engine compression brake.

Said Steve Charlton – Vice President, Heavy-Duty Engineering, “Our Heavy-Duty engines for 2010 have a large ‘sweet spot’ due to the low-temperature NOx conversion capability of the copper-zeolite catalyst, which means that these engines are extraordinarily driver-friendly. Fuel economy gains can be realized with even the most inexperienced driver and, at the same time, the engines deliver performance that the driver will love.”

Cummins debuted its MidRange engines for 2010, which appear nearly identical to their 2007 counterparts with the addition of an SCR catalyst in the Cummins Aftertreatment System. Cummins MidRange engines deliver best-in-class fuel economy and reliability with best-in-class power-to-weight ratios and have made significant market share gains in medium-duty truck and bus applications.