Main Engine 4-Stroke · Main Engines (4-Stroke)
The HiMSEN 9LH32/40 is a 4-stroke, turbocharged heavy fuel engine designed with a Miller Cycle, which optimizes efficiency by delaying the intake valve closing to increase the compression ratio and improve thermal efficiency. This engine features a bore of 320 mm and a stroke of 400 mm, producing 4050 kW of power at 720 rpm. It is capable of running on Heavy Fuel Oil (HFO) or Marine Diesel Oil (MDO) with a sulfur content up to 700 cSt at 50°C. The engine has a displacement range of 193 to 643 liters per cylinder, depending on the number of cylinders, and operates with a compression ratio of 15:1. Common maintenance issues include turbocharger fouling, exhaust gas temperature imbalances, and piston ring damage, all of which require regular inspection and cleaning to ensure optimal performance.
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