Navistar introduces ProStar+ with MaxxForce 15 engine

May 1, 2011
NAVISTAR Inc announced production availability of its anticipated MaxxForce 15, which completes the broadest, most comprehensive lineup of integrated

NAVISTAR Inc announced production availability of its anticipated MaxxForce 15, which completes the broadest, most comprehensive lineup of integrated truck-engine offerings available to North American commercial truck customers. The engine will be offered in the ProStar+.

“With the addition of our MaxxForce 15, our lineup of MaxxForce Advanced EGR big bore engines truly differentiates us from the competition,” said Jim Hebe, Navistar's senior vice-president, North American sales operations. “The introduction of the ProStar+ with MaxxForce 15 now gives customers the ultimate combination in durability and power.”

Engineered specifically for International's Class 8 heavy-duty on-highway trucks, the engine is available with up to 500 horsepower and 1,850 lb-ft of torque and is the most powerful engine Navistar builds (International PayStar heavy-duty vocational trucks are available with MaxxForce 15 up to 550 horsepower). The engine is designed to handle the most extreme demands that customers require.

The MaxxForce 15 is built on a proven block and crankshaft combined with the fuel and air systems of the MaxxForce Advanced EGR system. This combination delivers unprecedented hauling power and unrivaled durability with the convenience of a hassle-free 2010 emissions solution. Peak torque is achieved at 1,000 rpm and holds steady to 1,600 rpm, which reduces gear-shifting needs uphill and allows for shifting at lower speeds when accelerating. Durability is enhanced with a four-bolt connecting rod design. The four-bolt design assures the clamping force and rigidity required for extreme loads and terrain, for which the MaxxForce 15 is designed.

A premium cam and rolling element valvetrain system reduces friction and operational load to maintain peak efficiency across the power band, according to Hebe. Interstage cooling between the turbos increases air density to maintain peak power as speeds increase.

The MaxxForce 15 joins the MaxxForce 11 and 13 engines that are already part of the product line. The MaxxForce 11 and 13 offer significant versatility, with available options including the MaxxForce Engine Brake by Jacobs as well as programmable electronic parameters for increased fuel economy and fleet maintenance. Later this year, MaxxForce 13 will be offered with up to 500 horsepower and available for order in the International LoneStar.

All 2011 International brand commercial trucks for the North American market are powered by MaxxForce engines with MaxxForce Advanced EGR emissions technology. Navistar has pursued its in-cylinder emissions solution path for the past decade to provide the most customer-friendly powertrain on the market.

With MaxxForce Advanced EGR, customers won't have the worry or inconvenience of finding and filling liquid urea, according to Hebe. MaxxForce Advanced EGR provides customers with a no-hassle solution that keeps responsibility for emissions compliance with the manufacturer — not the vehicle owner or driver. ♦