Calling its new-generation X series heavy duty diesel engines symbolic of a “new era at Cummins,” executives and engineers for the Columbus, IN-based engine maker said the X Series lineup hits the big- and medium-bore market with a combination of class-leading power ratings and the ability to meet federal Phase 1 greenhouse-gas (GHG) and fuel-efficiency standards slated to begin next year. The 2017 X Series inline 6-cylinder engine line is comprised of the X12 with a 12L displacement and the big-bore X15, a 15-liter version of the new engine platform that comes in two variants, X15 Performance Series and X15 Efficiency Series. The X12 has 350-475 hp ratings; the X15 Performance range runs from 485-605 hp, while the Efficiency variant offers 400-500 hp ratings combined with what Cummins believes will be game-changing fuel-efficiency potential. But if that’s not enough, Jim Fier, Cummins vice president of engineering, said at a media introduction of the X Series that the new heavy duty diesels also underscore the company’s commitment to reliability, part of a four-pronged initiative to lead the market in performance, fuel economy, uptime and integration with advanced transmission and engine-optimization/tuning technology. Fier said the X Series engines have seen more than 9 million test miles. “Inspired by our customers and their business needs, Cummins is delivering the power of great ideas with our next-generation engines revealed today as the X15 Performance Series, the X15 Efficiency Series and the X12 focused on productivity—each optimized for specific duty cycles and applications,” said Srikanth Padmanabhan, Cummins president-Engine Business, in a release.

And perhaps at least as potentially impactful as the X Series design’s melding of power and efficiency, standard for the new engine platform is capability for over-the-air (OTA) engine diagnostics, software updates and even calibration changes that can be initiated by the driver through a compatible in-cab telematics interface. All three engines will be manufactured at the Cummins Jamestown Engine Plant in Jamestown, NY. Limited-production runs begin in the fourth quarter and will total perhaps 1,400 engines by the end of 2016, with full production starting next January, said Fiers. Download Lagu Simple Plan Jet Lag Remix. The medium-bore X12 begins production in 2018. Big-bore is back Noting that many have speculated Europe’s trend toward downsized engines and the Environmental Protection Agency’s pending 2017 Phase 1 fuel-efficiency and emissions regulations—and stricter phases to come later—spell the end of the big-bore heavy-duty diesel engine, Lori Thompson, vice-president of marketing, said the X Series design and technology innovations prove large-displacement engines aren’t necessarily doomed by legislation.