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Created by Weichai Power, the WP15 underwent cold start tests, idle, maximum load, and rapid power variations, demonstrating stability, emission control, and compatibility with structures already used in diesel engines for large-scale industrial applications.
The hydrogen engine WP15, developed by the Chinese company Weichai Power, was approved in compliance tests with the China VI standard for heavy vehicles. With 600 horsepower, the equipment is presented as the first of its category to achieve these regulatory parameters.
The evaluation took place at the CATARC Automotive Test Center. Engineers analyzed the structural stability of the system and the emissions of exhaust gases during a complete operational cycle, simulating different situations encountered in real applications.
Tests put the hydrogen engine in extreme conditions
The WP15 underwent cold start, low-speed idle, maximum load at high speed, and transient load variations. The goal was to verify emissions, reliability, and stability during intense operational changes.
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The engine has 14.6 liters, delivers a torque of 2,800 N·m, and achieves a maximum brake thermal efficiency of 46.8%. This index represents the portion of the fuel’s chemical energy converted into useful mechanical work.
The configuration uses direct hydrogen injection and spark ignition. Unlike systems that inject fuel into the intake port, the gas is sent directly to the combustion chamber.
This architecture reduces vulnerabilities related to pre-ignition and backfire. Since hydrogen has a wide flammability limit and rapid flame propagation, controlling the mixture within the cylinder is essential to avoid mechanical failures.
Precise control seeks efficiency and stability
Direct injection allows controlling the distribution between air and fuel within the cylinder. With this, the system can operate with a lean mixture and reduce sudden pressure peaks during combustion.
The chamber geometry and precise ignition timing also help to take advantage of the rapid heat release of hydrogen. The goal is to convert more energy into motion and reduce thermal losses through the cylinder walls.
Another highlighted point is industrial compatibility. More than 90% of the component architecture is shared with conventional diesel engine platforms, reducing the need for changes in the block, mounts, and main structural fastenings.
This similarity facilitates installation on chassis already used by heavy vehicles. The design maintains load capacities and mounting configurations known to the industry, simplifying integration into existing equipment.
Applications range from trucks to large generators
Weichai indicates the WP15 for long-distance trucks, mining dump trucks, port equipment, vehicles used in steel mills, and large hydrogen-powered energy generators.
The system is also designed to tolerate different levels of fuel purity. Unlike fuel cells, which require ultra-pure hydrogen, the engine can use less pure fuel without damaging injection valves or spark plugs.
This tolerance can reduce filtering and purification requirements in the refueling infrastructure.
Regulatory approval represents an important technical step before commercial adoption, as it demonstrates that the set has managed to meet specific vehicle emission requirements.
The company states that it intends to accelerate mass production and support national demonstration projects related to hydrogen.
Why this technology draws attention
Hydrogen internal combustion engines preserve part of the mechanical logic already known to the industry but replace fossil fuels with hydrogen. This can facilitate adaptations in applications that require high power, long hours, and integration with existing equipment.
The technology, however, is different from fuel cells: instead of generating electricity through an electrochemical reaction, it burns hydrogen inside the cylinders to produce movement.
Therefore, efficiency, combustion control, safe storage, and refueling infrastructure remain central points for its application in trucks, machines, and generators.
With information from prnewswire.
