LOUISVILLE, Ky. — At a press event at this week’s Mid-America Trucking Show here, Navistar Inc. announced the production availability of its MaxxForce 15, billed as the final piece in “the broadest, most comprehensive line-up” of integrated truck-engine offerings available to North American commercial truck customers.
“With the addition of our MaxxForce 15, our line-up 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, MaxxForce 15 for the International ProsStar+ 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 MaxxForce 15 is built on a proven block and crankshaft — an adaptation of the Caterpillar big bore power plant — combined with the fuel and air systems of the MaxxForce Advanced EGR system, Hebe said. 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. Interstage cooling between the turbos increases air density to maintain peak power as speeds increase.
Kevin Jones of The Trucker staff can be reached for comment at firstname.lastname@example.org.
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