Cummins' new mid-displacement turbos quieter, more efficient

Cummins announced its seventh-generation series HE250 and HE300 waste-gate turbochargers for medium displacement on- and off-highway commercial engines. The turbos are sized for 5.5- to 8-liter medium-duty diesel engines and 8- to 11-liter natural-gas engines. Cummins states that the HE250 and 300 were designed to meet the global emissions regulations from 2024 onwards including the upcoming China Stage IV FE 2024, NSVII 2026 and Euro VII 2027.

Cummins claims significant improvements in performance and durability compared to the outgoing models. Both turbos reportedly offer a 6-7% gain in overall efficiency as well as enhanced low-speed performance, which translates to additional low-end torque and better compatibility with engine start/stop systems.