International MaxxForce power ratings
International Truck and Engine Corp. has revealed the power and torque ratings for its MaxxForce 11 and MaxxForce 13 Class 8 engines, which the company says will be available by year’s end. Six MaxxForce big-bore models offer ratings of 330 to 475 hp and 1,250 to 1,700 lb.-ft. torque.
The efficiency and power characteristics of the MaxxForce 11 and MaxxForce 13 are made possible in part by a high-pressure common-rail fuel system, twin-series turbochargers with interstage cooler, and Eco-Therm, International’s heat-management system, according to the company. Eco-Therm features a multiple coolant circuit design managed by an electronically controlled coolant control valve.
The advanced fuel- and air-management systems of the MaxxForce engines provide instant response to reach peak torque at 1,000 rpm, which means earlier acceleration upshifts and fewer grade-climb downshifts, the company says. This keeps MaxxForce big-bore engines operating more often in the lower speed range for improved fuel economy.
International also announced:
International Truck and Engine Co.
www.internationaldelivers.com
High-torque 600-hp engine
Cummins Inc. has unveiled its most powerful ISX in years – a 600 hp engine with 2,050 lb.-ft. of peak torque – to be available beginning this fall. The company also announced production availability of the ComfortGuard auxiliary power unit (APU), as well as the approval of biodiesel B20 blends for use in its 2002 and later emissions-compliant ISX, ISM, ISL, ISC and ISB engines.
The high-performance ISX is designed for heavy-haul customers, fleets and owner-operators who specialize in expedited freight – as well as “performance enthusiasts” in the trucking industry. The additional torque allows for constant road speed, even on steep inclines, thereby reducing the number of downshifts and lowering driver fatigue. In addition to stronger pulling power, the ISX for 2007 also includes electric actuation on the patented VG Turbo, for improved engine response across the entire power range, Cummins says. The Intebrake system, an integrated compression brake that generates more than 600 braking horsepower, continues as standard equipment.
