Weichai Power has received China VI emissions certification for what it says is the world’s first heavy-duty hydrogen internal combustion engine, marking a milestone in the development of hydrogen-powered commercial vehicle technology.
The certification followed testing conducted on July 3, 2026, at a state-certified automotive testing center in Tianjin, where the engine was evaluated under a range of operating conditions, including cold starts, high-speed full-load operation and transient load cycles.
Hydrogen Engine Designed for Heavy-Duty Transport
The certified WP15 engine features a 14.6-liter hydrogen direct-injection, spark-ignited design that produces 447 kilowatts (600 horsepower) and 2,800 Newton-meters of torque.
According to Weichai, the engine achieves a maximum brake thermal efficiency of 46.8% while eliminating direct carbon emissions during operation.
The company said the engine is designed to provide performance comparable to conventional diesel engines while reducing fuel consumption and supporting decarbonization in heavy-duty transport.
A key feature of the WP15 is its compatibility with existing manufacturing platforms. Weichai said more than 90% of the engine’s components are shared with its conventional diesel engines, helping reduce production, maintenance and retrofit costs.
The company also said the engine can operate using lower-purity hydrogen than many competing hydrogen combustion systems, potentially lowering fuel costs and easing deployment in markets where high-purity hydrogen remains limited.
Focus on Commercial Deployment
Weichai expects the hydrogen engine to be used in applications including long-haul trucks, mining haul trucks, port machinery, steel plant vehicles and large-scale hydrogen-powered generators.
The company said the technology is intended for sectors where battery-electric alternatives may face challenges related to vehicle weight, operating range and continuous heavy-load operation.
Weichai has invested in hydrogen powertrain technologies for more than 20 years and has established research, engineering, testing and manufacturing capabilities covering the full development process.
Following certification, the company said it plans to accelerate mass production of the WP15 while supporting China’s hydrogen demonstration programs as commercial adoption of hydrogen-powered heavy-duty vehicles expands.