Issue link: https://read.dmtmag.com/i/730281
demanding applications. Cummins made several hardware changes to improve performance on the X15 Performance engine, includ- ing a high-fl ow EGR cooler and piston cooling nozzles and exhaust valves to improve reliability. The X15 Perfor- mance Series boasts from 485 to 605 horsepower, torque ratings from up to 2,050 lb-ft, and as much as 600 brak- ing horsepower. "We have increased braking power through the operating speed of the en- gine, from 1,300 to 1,700 rpm, where you need it the most," said Jim Fier, Cummins' vice president of engineer- ing. "No matter how diffi cult the job, drivers will have the confi dence that they'll be able to get up the mountain and back down with no worries." The X15 Effi ciency Series ranges from 400 to 500 horsepower and 1,450 to 1,850 lb-ft of torque, and 400 braking horsepower at 1,300 rpm. In addition, Cummins has added predictive cruise control to its ADEPT suite of con- nected vehicle technology. "Many have wondered about the role of the big-bore, heavy-duty engines in the North American market as com- pared to more recent medium-bore introductions, begging the question whether we'll follow what's happen- ing in Europe," says Lori Thompson, Cummins' vice president of market- ing. "With the benefi t of several years of market experience, we can answer that question: the big-bore engine is here to stay." Cummins fi rst announced its single module aftertreatment system concept in 2015, and it is now production- ready with the X series, combining VOC, DPF and SCR into a single canister and saving up to 60 percent more space and weighing 40 percent less than the company's previous aftertreatment system. In addition, the single module aftertreatment system allows the DPF cleaning interval to be extended to between 600,000 and 800,000 miles. Cummins also announced its Oil- Guard oil analysis program that offers customers the opportunity to extend 12 www.bigrigowner.com O C T O B E R 2 0 1 6 HPD The X15 Effi ciency The X15 Performance