Yuchai Introduces Its First High-Pressure, Direct-Injection Pure Ammonia Internal Combustion Engine For Heavy-Duty Commercial Vehicles

SINGAPORE, May 14, 2026 /PRNewswire/ -- China Yuchai International Limited (NYSE: CYD) ("China Yuchai International" or the "Company"), one of the largest powertrain solution manufacturers through its main operating subsidiary in China, Guangxi Yuchai Machinery Company Limited ("Yuchai"), today introduced its first high-pressure, direct-injection internal combustion engine capable of operating entirely on ammonia and designed for heavy–duty commercial vehicles. This is a historic breakthrough for Yuchai in its low- and zero-carbon power research initiatives in hydrogen-, methanol-, and now, ammonia-based propulsion.