Detroit DD15 The New Heavy-Duty Diesel Engine from Daimler Truck AG

Heavy-duty diesel engines will continue to play a major role in the heavy-duty truck business for years to come. Higher demands on exhaust emission requirements and challenging legislation in conjunction with relentless competition will push the technical development of diesel engines beyond what they currently represent. Regardless of alternative power units, the diesel engine will need to actively contribute to achieve future CO2 legislation goals and account for the overall accomplishment.For this reason, in 2015 DAIMLER Truck AG decided to re-engineer and upgrade its heavyduty engine series as part of the so-called HDEP2020 project. HDEP (‘Heavy-Duty Engine Platform’) engines consist of inline-six engines brought to the market in 2008 and have been used ever since in trucks and buses of Daimler Truck AG and third-party applications around the globe. To this day, attributes such as high efficiency and technological leadership with respect to quality and fuel efficiency are inseparably associated with the HDEP engine platform.As the first of its kind, the Detroit DD15 Gen 5 engine will be launched by end of 2020 to launch the new HDEP2020 generation. In early January 2021, it will be available in class 8 vehicles of DTNA (Daimler Trucks North America).The DD15 HDEP2020 will be offered in a power range up to 505 hp with a maximum torque of 1,750 lb-ft.The following article outlines the goals of the HDEP2020 engine project, describes the approach and explains the technical concept using the Detroit DD15 engine as an example.