More MaxxForce From International
International Truck and Engine Corp., has unveiled its lineup of MaxxForce International diesel engines for 2008 model year trucks. Beginning in January, MaxxForce engines become the signature powerplant for International brand on-highway Class 4 through Class 8 commercial vehicles. The MaxxForce line ranges from the upgraded 4.5 L V-6 MaxxForce 5 to the new MaxxForce 13 big-bore Class 8 engine.
The most significant addition is a new 6.4 L MaxxForce 7, which will power Class 5-7 International DuraStar series medium-duty trucks, IC brand buses, International brand commercial buses and two vehicles in the International XT Family. The engine will be available in ratings from 200 to 230 hp with maximum torques of 560 to 620 ft. lb. A 300-plus horsepower rating of the MaxxForce 7 will be offered in the fall of 2007.
The engine features a number of advanced features including an electronically controlled Borg-Warner variable geometry turbocharger and a Siemens high-pressure common rail fuel system utilizing piezo-actuated injectors. The V-8 platform has had more than 80,000 hours of engine testing and six million miles of development and validation, the results of which show impressive numbers, International said. Dynamometer testing with the MaxxForce 7 engine has demonstrated significantly enhanced fuel economy over its predecessors, according to the company. “Our lab data verifies a double-digit fuel economy gain during pickup and delivery cycles,” said Helmut Endres, vice president engineering and product development, International Engine Group. “Even with increased displacement and the impact of exhaust aftertreatment devices, engine dynamometer and vehicle testing indicates the fuel economy of MaxxForce 7 powered products will not degrade (relative to the current V-8 product) under any operating condition.”
Other MaxxForce engines launched for 2008 include the MaxxForce 5 (200 hp and 440 ft. lb. of torque) built on International’s V-6 engine platform that features an upgraded intake throttle, a larger EGR cooler and enhanced electronics; The MaxxForce DT (210 to 300 hp and 520 to 860 ft. lb. of torque), built on the DT 466 inline six-cylinder platform; the MaxxForce 9 (300 to 330 hp and 800 to 950 ft. lb. of torque), built on International’s I-6 architecture and featuring a bigger EGR system, foam-molded wiring harnesses and closed-crankcase ventilation system; and the MaxxForce 10 (310 to 350 hp and 1050 to 1150 ft. lb. of torque), also built on the I-6 architecture and with a larger EGR system, foam-molded wiring harness and closed-crankcase ventilation system.
Specifications for the top-of-the-line MaxxForce 11 and MaxxForce 13, International’s new big-bore diesel engines for the Class 8 truck market, will be released at the 2007 Mid-America Trucking Show.
More information on the new MaxxForce engines will be included in an upcoming issue of Diesel Progress.