Eaton Commercial Vehicle and Cummins Inc. have expanded their lineup of integrated ISX15 SmartAdvantage Powertrains to provide customers additional choices tailored to their unique application and operations. A new SmartAdvantage direct drive ratio is now available, and new engine ratings for the small-step overdrive ratios are forthcoming. The new SmartAdvantage direct drive ratio is available in Cummins ISX15 400 hp and 450 hp ratings with 1,550/1,750 ft.-lb. torque rating, ensuring optimal performance at lower rpm when combined with a 2.26 or 2.28 axle ratio. The package suits regional applications in flat and hilly road terrains at cruise speeds in the 50 to 62 mph range.
The new SmartAdvantage Powertrain options continue to leverage the diesel engine’s torque and efficiency with technology that enables downspeeding, where rpm is lowered for cruising at a certain speed and nets fuel savings. The Eaton Fuller Advantage Series 10 Speed transmissions feature a 26 percent step between 9th and 10th gears to maximize downspeeding in the small-step overdrive model by keeping the engine in its “sweet spot” for maximum fuel economy. Fuller Advantage transmissions address friction loses every 100 rpm of engine downspeeding, bolster fuel efficiency by approximately one percent, and provide customers with increased cost savings.
Features of the Eaton Fuller Advantage automated transmission include the strategic use of lightweight components and precision lubrication, which reduces churning losses and eliminates the need for a cooler. These factors reduce weight, increase reliability and improve fuel efficiency. Optimized shifting is based on grade, vehicle weight, engine torque and throttle position. The 2015 ISX15 incorporates such enhancements as low-end torque available at 1,000 rpm and ADEPT, a suite of innovative electronic control features that optimize driver performance and asset protection—among SmartTorque2, Vehicle Acceleration Management, PowerTrain Protection and SmartCoast. — Eaton Commercial Vehicle, www.eaton.com/roadranger