en.Wedoany.com Reported - The WinGD-designed ammonia dual-fuel two-stroke marine engine X52DF-A-1.0, manufactured by China's Yuchai Marine Power Co., Ltd (YCMP), has passed its second round of Factory Acceptance Tests (FAT) witnessed by the China Classification Society. Additionally, Yuchai launched its first ammonia-powered heavy-duty vehicle engine last month through another subsidiary. Test results showed stable engine operation, with NOX emissions from ammonia fuel significantly lower than those from conventional fuels, and N2O emissions maintained at minimal levels, contributing to an improved overall greenhouse gas emission profile. The engine had previously passed Type Approval Tests (TAT) and its first Factory Acceptance Test in South Korea in January 2026.
The X52DF-A-1.0 engine will be installed on a 25,000 m³ vessel, one of four LPG/ammonia carriers owned and operated by Tianjin Southwest Maritime, currently under construction at CSSC Huangpu Wenchong Shipbuilding Company Limited. Peter Krähenbühl, Vice President of Product Center at WinGD, stated in a press release on May 21, 2026, that the successful completion of the Factory Acceptance Test in China provides further validation of key performance and safety parameters for the X-DF-A platform, indicating continued progress in the development and validation of ammonia fuel engine technology. The deployment of ammonia-powered propulsion into commercial service requires close collaboration across the maritime value chain, particularly between engine designers and manufacturers. Close cooperation with partners such as YCMP enables development progress to be translated into reliable manufacturing and testing outcomes, supporting the safe and efficient deployment of ammonia fuel propulsion technology.
WinGD hopes this test will further promote the adoption of ammonia as a low-carbon fuel, as well as the development, commercial readiness, and deployment of ammonia fuel propulsion technology, supporting the shipping industry's decarbonization strategy. The company noted that parallel developments in fuel production, infrastructure, and vessel design have strengthened confidence. Currently, WinGD's order book includes over 30 X-DF-A engines, covering various vessel types such as gas carriers, bulk carriers, tankers, and container ships. Regarding other ammonia dual-fuel marine engines, Everllence's ME-LGIA has also passed Factory Acceptance Tests, and Hyundai Heavy Industries (HHI) plans to install these engines on a series of Very Large Ammonia Carriers (VLACs) under construction, owned by Eastern Pacific Shipping (EPS), by October 2026.
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