Influence on Failure of High-speed Diesel Engines by Operational Condition: Report of Survey on Failures of Main Engines of High-speed Ferries

概要

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Most domestic high-speed ferries are powered by high-speed diesel engines with speeds above 1000 rpm. It is said that operator claims for engine failures of high-speed vessels remain high in comparison to conventional vessels. We considered that various engine failures were associated with the maneuvering patterns of high-speed ferries, such as short passages, fast turnarounds, etc. Our questionnaire survey of failures in high-speed diesel engines during the past five years covered the ship operating conditions, including ship speed during cruising, navigation distance, running hours, and number of round-trip crossings per year. We divided the engine into five basic failure areas for ease of analysis. The most frequent engine failures were crankshaft failure, main bearing failure, camshaft failure, and cylinder liner wear and cracks. The number of failures per year was associated with total navigation distance per year and engine load in cruising conditions.