Dual Fuel Engine｜VISION01｜Technology｜About YANMAR

船用發動機與柴油和天然氣燃料結合使用，具有更清潔的排放和更大的動力。

大型電源產品管理部，電源解決方案業務: From the perspective of global environmental protection, emission regulations have been stricter in the marine world, and reduction of environmental pollutants such as NO_X and SO_X has become a challenge. To reduce environmental impacts, Yanmar has developed a dual fuel engine that can switch between diesel and natural gas fuel (LNG). The installation of Dual Fuel Engines on tugboats and other are increasing.

考慮全球環境並以高經濟效益運轉的發動機

Large vessels operating in the seas around the world are equipped with engines with high power. An issue confronting our world today is the air pollutants from the emission of those large engines. In recent years, the use of natural gas has attracted attention. Liquefied natural gas (LNG) is environmentally friendly and can reduce greenhouse gases. Therefore, Yanmar has begun developing the dual-fuel engine that can flexibly use both LNG and diesel fuel to take advantage of eco-friendliness and wider availability. We set the goal high to develop a new engine complying with The International Marine Organization (IMO) Tier 3 NO_X (IMO3) and SO_X regulations for all sea areas based on a reliable model that can pursue improvements in the life cycle value (LCV) for customers.

Effective since January 1, 2016, the 3rd tier regulation (IMO3) is that IMO requires on the standard of NO_X emission control. IMO3 to regulate 80% lower emissions than the primary regulation, is applied within a designated sea area called NO_X Emission Control Area (N-ECA). The US and Canadian coasts, the U.S. Caribbean, the North Sea and the Baltic Sea have already been regulated for SO_X, while the U.S. and Canadian coasts have already been regulated for NO_X. The North Sea and the Baltic Sea will be subject to regulation from January 1, 2021.

利用YANMAR技術實現安全穩定的導航

YANMAR公司開發的雙燃料發動機採用了高精度的氣流控制技術。始終保持最佳燃燒條件，這使得在同時使用天然氣和柴油時，運行更加可靠和穩定。此外，採用了獨特的控制系統以確保在海上作業時的安全性。通過對設備進行多路復用，我們實現了安全性和冗餘性，使得每個軸僅一台機器即可實現安全導航。此外，它還配備了自己的空燃比控制和爆震檢測系統。即使在使用甲烷含量低的天然氣燃料時，也會擔心異常燃燒（爆震），但仍會實時分析氣缸壓力。通過高速控制，可以避免爆震。雙燃料發動機可與世界各地的天然氣兼容，並且可以不受功率限制地運行。在導航過程中，即使在最大輸出時，也可以從柴油模式切換到汽油模式。在緊急情況下，它可以安全、即時地從汽油模式切換到柴油模式。

符合嚴格的環境法規

In the gas mode of the developed model, 6EY26DF, we achieved approximately 80% of NO_X (nitrogen oxide) , 25% of CO₂, 99% of SO_X (sulfur oxide) and PM (particulate matter) reduction compared to our previous model in the same engine class, 6EY26W. Meeting the 3rd tier IMO standard while maintaining its advantages such as high fuel efficiency and power, we created new technologies that address the global issues of reducing environmental impacts and fluctuating fuel prices. Yanmar has been driving the evolution of engines, and will continue to diversify technologies for the next generation.

安裝在Ishin上
凝聚人心成為推動項目的動力

自2019年3月以來，Ishin拖船一直從事大型貨船的安全工作，該船在大阪灣和瀨戶內海航行，並從港口拖曳進出港。作為日本第一艘以液化天然氣為燃料的拖船，它受到了人們的關注。並符合IGF（*）規範標準。YANMAR的雙燃料發動機6EY26DF被安裝為“Ishin”的主推進發動機。

拖船及其特色工作可能會由於推拉更大、更重的船舶或貨物而給發動機施加突然的重負荷。測試負責人杜伊（Doui）回顧道：“YANMAR沒有生產用於船用產品的燃氣發動機的歷史，而且燃氣模式通常易受負載波動的影響。作為第一個交付的產品，我覺得這個項目真的很困難。在與有關合作夥伴的會議上，我們被要求到是否可以繼續進行，並被告知如果不符合標準就不能使用該拖船。即使聽起來刻薄，我們仍共同努力以達到期望並不斷解決問題，” 杜伊先生和系統設計經理久保先生說。負責發動機設計的西村說，“我們徹底評估了安全性，確保機組人員與環境都可以安心使用汽油模式。”

起初起航時，服務部門和開發部門的成員登上了拖船。每個共同的合作夥伴都說隨著船的打造，團結的感覺不斷醞釀著。那是純粹的喜悅和令人印象深刻的工作。該項目是通過客戶和YANMAR的共同推廣而實現的。

* IGF規範：2017年發布的使用氣體或其他低閃點燃料的船舶的國際安全規範，以指定安全要求。