OceanSphereENGINES

6L34DF

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

Technical data from manufacturer or class sources · not yet verified by a person​​‍‌‍​​⁠​‍‌​⁠‍‍‌‍⁠‌​
3,000 kWPower
6Cylinders
340 mmBore
400 mmStroke
750 rpmMCR RPM

The Wärtsilä 6L34DF is a medium-speed, four‑stroke dual‑fuel marine diesel engine delivering up to 3 MW at 750 rpm, notable for its lean‑burn gas mode that meets IMO Tier III emissions while retaining the ability to run on conventional oil fuels.

Specifications

Technical data.reference — unverified

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Power per cylinder (main engine 34DF)500 kW @ 750 rpm
Power per cylinder (auxiliary 34DF)520 kW @ 720-750 rpm
Mean effective pressure (main)20.0-19.8 bar
Piston speed9.6-10.0 m/s
Compression ratio (16V/20V)12.6:1
Engine type4-stroke, turbocharged intercooled non-reversible
Swept volume per cylinder36.3 dm³
34DF Max output (16V main)8000 kW
34DF/34SG Max output (20V genset)9800 kW
34SG designSpark-ignited, lean-burn, pre-chamber
20V34SG dimensionsL:12.7m × W:3.3m × H:4.65m
20V34SG weight131,500 kg
Engine kW2 880 kW
Gen. kW2 770 kW
Dimensions (mm)8 765 mm
Weight60 tonnes
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