This means it can cruise in top gear longer, for better fuel efficiency.
It pairs perfectly with the low RPM torque curve and direct drive transmission. Faster 6x2 Axle Ratios: The 6x2 configuration boasts a 2.28 ratio, allowing the DD15 to turn lower RPMs with the truck cruising at the same speed.A variety of faster axle ratios are available, ranging from 2.41 to 2.28. Faster 6x4 Axle Ratios: The 6x4 configuration is available for applications requiring 4-wheel drive and superior traction.New Axles Designed for Fuel Economy: To provide optimum efficiency and performance, the Detroit Powertrain includes an all-new axle specifically designed to integrate with the downsped DD13 ®, DD15 ® and DT12 ®, resulting in rock-solid reliability and durability.Transmission Benefits: The DT12's direct drive and over drive gearing, along with eCoast, are integrated with the downsped engine - which now idles at a lower 500RPM when off-throttle - for optimized fuel economy.IPM4 refines the parameters of this technology, making the truck even more capable of utilizing its surroundings efficiently. Intelligent Powertrain Management (IPM): The DT12 ® uses information from a topographical map to manipulate both engine and transmission functions, taking advantage of the truck's surroundings.Super-Finished Gears: Tightly-spaced 12-speed gearing, now with "super-finished" gears in the new DT12 ® available for the new Cascadia, improves low-speed maneuverability, making the Detroit ® Powertrain not only strong and efficient, but also smooth and safe to operate as well.Integrated Communications Benefits: The DT12 ® transmission links engine to axles, and communicates with the DD13 ® and DD15 ® on an integrated electronics network to share damage-reducing information such as clutch overloading and driveline protection.BUILD IT WITH A DD15 Model Optionsĭesigned for construction, distribution, dump, fire and emergency, government, motor home, oil & gas, refuse, and regional. A variable-speed water pump that utilizes a viscous clutch between the pulley and impeller drive to reduce impeller speeds, making it more efficient than a gear-driven designīUILD YOUR CASCADIA WITH A DETROIT DD15 ENGINEĬustom-configure your Freightliner Cascadia ® with the performance-packed, reliable, fuel-efficient DD15 engine, only from Detroit.Optimized piston design for reduced friction and improved engine performance and durability.An Amplified Common Rail System (ACRS) to optimize combustion control.A proprietary asymmetric turbocharger, optimally matched to the updated Exhaust Gas Recirculation (EGR) system, delivering outstanding performance.2017 Greenhouse Gas (GHG17) and 2016 OBD (OBD16) compliance.An Amplified Common Rail System (ACRS™) to optimize combustion control.A proprietary asymmetric turbocharger to improve performance.A cooling system with shorter fan-on times for increased fuel efficiency.A three-stage integrated Jacobs ® engine brake for quieter engine braking and superior braking power.*Includes 400/1750 rating exclusively in the Integrated Detroit Powertrain More Specs PERFORM WHEN IT COUNTS Wilson 90-01-4730 9001-4730 90-014730 90014730.Our engineers re-examined, then re-designed many features of the DD15 to reach this level of performance
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