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9LM20C2

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

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍‌​​⁠​​‍‌‍​⁠‍⁠⁠​‍
1,800 kWPower
9Cylinders
200 mmBore
300 mmStroke

This product falls under the category of marine propulsion engines, specifically designed for commercial vessels. The MaK 9LM20C2 is a robust engine that delivers a continuous power output of 1800 kW at 1000 rpm, fueled by heavy fuel oil (HFO), marine diesel oil (MDO), or marine distillate (DMA). This engine features a 9-cylinder configuration with a bore and stroke of 200 mm and 300 mm respectively, resulting in a bore-stroke ratio of 1:1.5. The engine incorporates advanced turbocharging and charge air cooling systems, ensuring optimal performance and efficiency. Additionally, it is equipped with a direct injection high-pressure common rail fuel system, enhancing fuel efficiency and reducing emissions. The engine also features an anti-wear ring design cylinder liner, which extends maintenance intervals to 30,000 hours under HFO operation. Regular maintenance checks are recommended to address common issues such as charge air cooler fouling, turbocharger erosion, crankshaft bearing wear, fuel injection system leakage, and camshaft bearing damage to ensure optimal performance and longevity.

Specifications

Technical data.reference — unverified

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Bore/Stroke ratio200/300 mm (ratio 1:1.5)
BMEP (Brake Mean Effective Pressure)24.1 bar @ 900 rpm, 24.2 bar @ 1000 rpm
SFOC (Specific Fuel Oil Consumption)186-190 g/kWh @ 100%/85% MCR
Specific oil consumption0.6 g/kWh (tolerance ±0.3 g/kWh)
Swept volume per cylinder9.4 liters
Power per cylinder170-190 kW
Mean piston speed9-10 m/s @ 900/1000 rpm
Turbocharger systemKBB HPR4000/5000, high-performance, non-water-cooled casing with high charge air delivery
Charge air coolerRedesigned for M20C, integrated with cooling system
Fuel injection systemDirect injection, high-pressure common rail capable
Cylinder linerAnti-wear ring design, piston removal interval 30,000 hours under HFO operation
Genset frequency stabilityFrequency drop <5% in 4-load step system (testbed confirmed)
Power (kW)1800
Speed (rpm)1000
Fuel TypeHFO/MDO
ConfigurationL
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