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Rolls-Royce / Bergen

12VB36:45

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

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍‌​⁠‌‌​‍‍​​​⁠⁠⁠​⁠
6,480 kWPower
12Cylinders
360 mmBore
450 mmStroke

The Rolls‑Royce/Bergen 12VB36:45 is a V‑12, 4‑stroke, lean‑burn spark‑ignition marine gas engine delivering up to 6 480 kW at 720 rpm, designed for dual‑fuel operation (natural gas and HFO/MDO) with high thermal efficiency and low NOx emissions.

Specifications

Technical data.reference — unverified

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Ignition SystemSpark-ignition lean-burn Otto cycle with individual cylinder pressure monitoring (CPM)
Turbocharger TypeVariable Turbine Geometry (VTG) with wastegate
Fuel InjectionPort injection with Variable Valve Timing (VVT)
Specific Energy Consumption (B36:45)7,300 kJ/kWh mechanical ISO with engine-driven pumps
Lubricating Oil Consumption< 0.4 g/kWh
NOX Emissions500 mg/Nm³ @ 5% O₂
Electrical Efficiency48.6% (B35:40V20); 48.5-48.9% (B36:45 series)
Cylinder Power Output438 kW/cyl (B35:40); 600 kW/cyl (B36:45)
Dry Weight ExamplesB35:40V12AG: 10,600 kg; B35:40V20AG: 13,100 kg
GHG vs Diesel22% lower greenhouse gas emissions
Power (kW)6480
Speed (rpm)720
Fuel TypeHFO/MDO
ConfigurationV
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