Q&A

Cummins reserved its first virtual press event since the pandemic onset to reveal details of its EPA 2021 emissions-compliant X12 and X15 Performance Series engines. Built upon the architecture of their EPA 2017 predecessors, the diesel power units follow to market the 2021-compliant X15 Efficiency Series that was launched earlier in 2020 and has demonstrated up to 3.5% better fuel economy (FE) compared to the 2019 engine. “When you look at the engines, you might notice some slight external modifications, but the bulk of what's changed was internal components,” said Kris Ptasznik, Heavy-Duty On-Highway Product Manager at Cummins, during a virtual walkaround of the new engines.

In 2021, the X15 Efficiency with EX ratings (which requires an Eaton Cummins Endurant HD automated transmission and GPS-enabled predictive features) could see an additional 1.5% FE improvement. Class 8 truck customers requiring more than 500 hp (373 kW) and selecting the X15 Performance Series, which ranges from 525 to 605 hp (392 to 451 kW), can receive FE gains up to 2% compared to the EPA 2017 version. Features previously unavailable above 500 hp - SmartCoast, Predictive Cruise Control and Predictive Road Speed Governor - will be available for 2021 X15 Performance engines with an automated manual.