Dual-fuel And Intelligence Are Advancing in Parallel, Marking An Accelerated Phase of Technological Iteration for Marine Diesel Engines

Driven by both environmental protection policies and market demand, marine diesel engine technology is accelerating its iteration towards the direction of "dual-fuel compatibility + intelligent operation and maintenance". In 2025, the proportion of dual-fuel engines in new shipbuilding has reached 38%, an increase of 22 percentage points compared to 2020. Models such as MAN Energy Solutions' ME-GI series and Wrtsil's 34DF series, which allow for free switching between fuel oil and fuels such as LNG and methanol, reduce carbon emissions by more than 25% compared to traditional models. ​

The integrated application of intelligent technology has become another core breakthrough point. Caterpillar's MaK M 46 DF engine is equipped with an AI energy efficiency management system, reducing fuel consumption by 8%; Yanmar's 6EY26W engine adopts digital twin technology, reducing downtime by 40%. At the same time, the market for intelligent components is rapidly expanding, with a projected size of 6.73 billion yuan in 2026, accounting for 36.3% of the total industry scale. By integrating sensors, controllers, and other components, real-time monitoring of engine operating status, fault warning, and remote diagnosis are achieved. It is noteworthy that ammonia fuel engine technology has made key progress. Although its current penetration rate is low, it is regarded as the ultimate solution in the zero-carbon era, and several companies have initiated commercial layouts.