Main Engine 4-Stroke · Main Engines (4-Stroke)
Ship engineers and operators rely on powerful and reliable engines to keep vessels moving efficiently and safely across the globe. The Wärtsilä 9LW31 is a robust engine designed for demanding marine applications. This 9-cylinder, 4-stroke engine boasts a 750 rpm speed and delivers 2745 kW of power, fueled by HFO/MDO. The 9LW31 features two-stage turbocharging with intercooling, common rail direct injection, and a mean effective pressure of 30 bar. Its bore is 310mm and its stroke is 430mm, contributing to a piston speed of 10.75 m/s. The engine's specifications indicate a Cylinder power of 610 kW/cyl (diesel) and a specific fuel oil consumption (SFOC) of 167.7 g/kWh at its optimal point. The Wärtsilä 9LW31 is designed for continuous operation and is known for its reliability and efficiency.
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