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MaK (Caterpillar)

6LM20C

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

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍​‍⁠‌⁠⁠​‌​​⁠‌‌‍‌⁠
1,170 kWPower
6Cylinders
200 mmBore
300 mmStroke

The MaK 6LM20C is a medium‑speed, six‑cylinder, four‑stroke trunk piston main engine delivering up to 1 170 kW at 1000 rpm, designed for flexible fuel use (HFO/MDO) and equipped with a high‑performance turbocharger and redesigned charge‑air cooler.

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)1170
Speed (rpm)1000
Fuel TypeHFO/MDO
ConfigurationL
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