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12V32/40

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

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍​‌‍⁠‌​⁠‍​​‍‌⁠‍​‍
12Cylinders
320 mmBore
400 mmStroke

The MAN 12V32/40 engine operates on a robust four-stroke turbocharged Diesel design, which ensures efficient combustion and performance for marine applications. With a bore of 320 mm and a stroke of 400 mm, this engine delivers a nominal power output of 5400 kW at 720 rpm, running on HFO/MDO fuel. The engine's advanced turbocharging system includes two-stage intercooling to optimize air intake and enhance efficiency. Its robust construction, featuring a mean effective pressure of 25.9 bar at 720 rpm, supports a dry mass of 61 tonnes. Common maintenance issues include cylinder liner wear, piston ring sticking, and charge air cooler fouling. Regular inspections and cleaning are essential to prevent these issues, ensuring the engine operates reliably over its service life.

Specifications

Technical data.reference — unverified

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Cylinder displacement32 L/cylinder
Power per cylinder500 kW/cyl
Mean Effective Pressure (MEP)25.9 bar (720 rpm) / 24.9 bar (750 rpm)
Mean piston speed9.6 m/s (720 rpm)
Specific fuel oil consumption (100% MCR)186 g/kWh
Specific fuel oil consumption (85% load)183 g/kWh
Lube oil consumption0.5 g/kWh
Dry mass (6L32/40)38 tonnes
Dry mass (8L32/40)47 tonnes
Dry mass (12V32/40)61 tonnes
Dry mass (18V32/40)85 tonnes
Compression ratio4.5
TurbochargingTwo-stage intercooling with advanced turbocharger
Charge air systemTwo-stage charge air cooler (HT and LT circuits)
Engine typeFour-stroke turbocharged Diesel, non-reversible (propulsion models)
Speed (rpm)720
Fuel TypeHFO/MDO
ConfigurationV
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