Main Engine 4-Stroke · Main Engines (4-Stroke)
Marine vessels often rely on robust and reliable engines to power their operations, particularly in heavy-duty applications where large horsepower outputs are required. The Wärtsilä 5LW22 is a 4-stroke diesel engine designed to handle such demands, featuring a bore of 220 mm and a stroke of 320 mm, delivering a power output of 725 kW at 1000 rpm. It is capable of running on Heavy Fuel Oil (HFO), Light Fuel Oil (LFO), and Marine Diesel Oil (MDO). The engine's design includes a direct injection system with turbocharging and intercooling, achieving a compression ratio of 13.8:1 and a mean pressure of 21.9 bar for D-Rating and 24 bar for E-Rating. The engine uses a circulation lubrication system with gear and vane pumps, and each cylinder is equipped with two intake and two exhaust valves. Common maintenance issues include wear on injection pump plungers, connecting rod bearings, cylinder liner wear and leakage, turbocharger wear, and fuel injection pump running bush wear, all of which can impact the engine's performance and efficiency over time.
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