Main Engine 4-Stroke · Main Engines (4-Stroke)
Regular maintenance is crucial for the reliable operation of the Wärtsilä 12V31DF engine, especially considering common issues like poor combustion at low load and carbon deposit accumulation. This 4-stroke engine, part of the Wärtsilä 31DF family, offers a maximum continuous power output of 6720 kW at 750 rpm. It is designed for dual-fuel operation, capable of running on both MDO and LNG, making it compliant with IMO Tier III emissions standards in gas mode. The engine features Otto-cycle lean-burn gas combustion and pre-chamber ignition for stable gas operation. Its robust construction includes two-stage turbocharging with intercooling and common rail direct injection, contributing to its high efficiency and reliability. However, maintenance challenges such as cylinder liner wear, extended high-pressure fuel pump overhaul intervals, and crankcase deposits should be addressed to ensure optimal performance and longevity.
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