Detroit Diesel Corporation was already a manufacturer of efficient and reliable engines, axles, and transmission. With the introduction of the new integrated Detroit Powertrain, featuring the Detroit DD15 engine, Detroit DT12 transmission, and Detroit axles, the powertrain is now integrated to deliver even better performance to lower the real cost of ownership for customers.
Available starting in January 2015 for the Freightliner Cascadia Evolution and later in 2015 for the new Western Star 5700, the integrated Detroit powertrain builds on the solutions developed by Daimler Trucks North America (DTNA) by providing state-of-the-art component communication that seamlessly work together.
The integrated Detroit Powertrain features the flagship DD15 engine, with new downsped rating of 400 horsepower and 1,750 lb/ft. The downsped rating enables the engine to turn at lower RPMs regardless of road speed, ultimately reducing fuel consumption and friction. Because it delivers the necessary torque at these low RPMs is the engine is able to deliver the power drivers demand.
The proprietary Detroit Virtual Technician On Board Diagnostic System is also integral to the Powertrain. The DD15 features the 1-Box emissions package that combines DOC, DPF, SCR catalyst and DEF doser, creating an optimal solution for a variety of truck configurations. The DD15 also meets OBD13 and GHG14 standards.
Working together with the DD15 engine and DT12 transmission, the new Detroit rear axles integrate effortlessly to provide optimum performance. Detroit now offers a 6x2 configuration with a 2.28 ratio that is specifically designed to work with the downsped engine rating, making it the fastest ratio available in Freightliner and Western Star trucks while still providing the performance drivers demand. The 6x2 Detroit axle configuration incorporates a non-driven tag axle on the tandem, reducing total weight by almost 400 pounds, while a new 2.41 ratio in its 6x4 axle configuration is also available for applications requiring superior traction. The integrated Detroit Powertrain includes steer axles that use low-friction needle bearings for maximum maneuverability and minimal maintenance.