OceanSphereENGINES

6L6L28HX

Main Engine 4-Stroke · Main Engines (4-Stroke)

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍​‍‌⁠​⁠‍​⁠​⁠‌‍‌​​
6Cylinders
280 mmBore
390 mmStroke

The Niigata 6L28HX (and its AHX derivative) is a medium‑speed, four‑stroke trunk‑piston main engine delivering up to 2 280 kW at ~720 rpm, noted for its compact L‑configuration and Miller‑cycle/VIVT technology.

Specifications

Technical data.reference — unverified

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Cylinder Pressure (28AHX)18 MPa (180 bar) maximum
Cylinder Pressure (28HX)15 MPa (150 bar) approximate
Specific Fuel Consumption (SFOC) 28AHX421 g/kWh (achieved via Miller cycle + VIVT)
Swept Volume6-cyl: 144L; 8-cyl: 192L; 9-cyl: 216L
Max Output/Cylinder 28AHX370 kW @ 800rpm; 345 kW @ 750rpm
Turbocharger TypeExhaust gas turbocharger with 2-stage charge air intercooling
Starter SystemCompressed air starter
Emissions Compliance28AHX: IMO Tier II/III (DF variant); 28HX: IMO Tier I
Speed (rpm)720
Fuel TypeHFO/MDO
ConfigurationL
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