Detroit Gen 6 Engines

COMING SOON | Lowering emissions, not expectations

The sixth generation of Detroit heavy duty engines push diesel further than ever before — with more torque and greater reliability, while using less fuel and producing lower emissions. 

Production of the DD13 and DD15 will start in January 2027, while the DD16 will follow with all the same upgrades in 2028. 

IMPROVED FEATURES INCLUDE:

• Miller cycle intake timing improves efficiency by reducing the work of compression, and lowers combustion temperatures to lower NOx emissions.

• Direct pressure, non-amplified fuel injectors maintained consistent, balanced fuel delivery in a simplified design, improving reliability. 

• A variable displacement oil pump regulates flow at low temperatures, feeding a lower pressure oil system to reduce power consumption. 

• The asymmetric turbocharger adds a wastegate valve to precisely control pressure across a wider operating range. This also improves engine braking performance and maintains heat for regenerations. 

• Detroit 1-Box aftertreatment adds pre-SCR technology to reduce nitrogen oxide to near-zero levels with no impact to engine performance. The entire system fits the same space on the frame rail with no back-of-cab protrusion, keeping chassis upfit consistent from previous generations.