Main Engine 4-Stroke · Main Engines (4-Stroke)
Designed with a robust common rail direct injection system and two-stage turbocharging with intercooling, the Wärtsilä 10LW31 delivers exceptional performance in medium-speed marine applications. This engine, part of the W31 family, features a powerful 5200 kW output at 750 rpm, achieved through its 10-cylinder L-configuration with a bore of 310 mm and stroke of 430 mm. Each cylinder contributes 610 kW of power, ensuring efficient operation across various fuel types, including HFO and MGO. The engine’s displacement per cylinder is 32.5 liters, and it operates at a mean effective pressure of 30 bar with an optimal SFOC of 167.7 g/kWh. The piston speed of 10.75 m/s and the advanced valve layout of two inlet and two exhaust valves per cylinder further enhance its performance. Despite its high efficiency, common operational challenges include issues such as poor combustion during low-load operations, which can lead to carbon deposits in cylinders and turbocharger fouling. Additionally, the engine may experience cylinder liner wear if not properly lubricated, and there is a risk of crankcase oil mist build-up due to accumulated carbonized lube oil and unburnt fuel residues. Wärtsilä addresses these concerns with regular maintenance recommendations and advanced upgrade options.
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