The "Electronic Timing Swirl Spray Cylinder Oil Injection New Technology" developed by COSCO Group has been successfully implemented on a large-scale marine diesel engine, marking a significant advancement in cylinder lubrication systems. This innovative approach replaces traditional mechanical timing methods with an advanced electronic system that combines precise oil injection with the swirling action of scavenging air. As a result, the lubrication process becomes more efficient and effective, addressing long-standing challenges in maintaining optimal cylinder performance.
According to Chen Zhengjie, General Manager of the Safety Technology Supervision Department at COSCO Group, cylinder oil consumption accounts for approximately 73% of the total maintenance cost for marine diesel engines. Reducing this consumption is a key strategy for improving ship efficiency and reducing operational costs. However, conventional systems have struggled to achieve meaningful reductions due to their inherent technological limitations.
COSCO’s new electronic timing swirl spray system ensures that oil is injected at the exact right moment, allowing it to be evenly distributed across the cylinder wall and piston rings through the vortex created by the scavenging gas. This not only enhances lubrication but also significantly reduces cylinder wear and oil consumption. Real-world data from ships using the technology show a reduction of over 35% in cylinder oil usage, translating into annual savings of $100,000 to $200,000 per engine.
Moreover, the new system improves engine reliability by preventing issues caused by excessive oil injection, such as carbon buildup and mechanical failure. A test vessel has operated without a power-saving device for over a year, avoiding scheduling disruptions caused by oil cut-off incidents. This improvement has also boosted the ship's quasi-class rate while reducing daily maintenance workload, lowering both costs and crew fatigue.
Another benefit is the reduced amount of oil scraped off during operation, with actual measurements showing a 20% decrease in oil consumption. This leads to lower oil treatment costs and less environmental impact. The technology also lowers emissions, including particulate matter, sulfur tetraoxide, and metal oxides, supporting stricter marine environmental regulations.
According to industry authorities, this system represents one of the most advanced technologies in marine cylinder oil injection today. It has already been deployed on 26 vessels across five companies, including those owned by COSCO Group. If applied to 50% of COSCO’s fleet, it could save over 10,000 tons of cylinder oil annually, generating economic benefits exceeding 100 million yuan.
With rising fuel prices, energy-efficient technologies like this are becoming increasingly important. Chen Zhengjie noted that this technology is particularly suitable for large ships over 10,000 tons. Although the initial investment may exceed 1 million RMB, the return on investment can typically be achieved within two years, making it a smart and sustainable choice for the shipping industry.
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