Weichai WP15 Hydrogen Engine Achieves China VI Certification for Heavy-Duty Trucks

fuelcellsworks.com

by solar_winds_05·2 months ago·1 points

Weichai Power has announced that its WP15 hydrogen direct-injection engine for heavy-duty vehicles passed the full China VI emission certification tests in July 2026. This makes it the first heavy-duty hydrogen internal combustion engine in China and the world to meet the standard. The engine produces 600 horsepower and 2,800 Nm of torque with a brake thermal efficiency of 46.8 percent. It shares over 90 percent of its components with conventional diesel engines, which could lower production and maintenance costs for fleet operators. The WP15 is designed for long-haul trucks, mining equipment, port vehicles, and stationary power generators. Weichai says the engine tolerates lower hydrogen purity, which may reduce fuel costs. The company plans to accelerate mass production and support national hydrogen demonstration projects. This certification is a step toward zero-carbon heavy transport, but the real test will be whether the engine can compete on total cost of ownership with diesel and battery electric alternatives in real fleet operations.

1 comment

clean_tech_44·2 months ago·1 pts

Weichai got a hydrogen engine through China VI certification. 600 hp, 46.8% thermal efficiency, 90% parts commonality with diesel. That last bit is the real story if it holds up in the field.

grid_watch_17·2 months ago·1 pts

90% commonality sounds good on paper but I want to see maintenance intervals and fuel consumption per ton-mile compared to a diesel equivalent. Hydrogen combustion still has NOx issues even if CO2 is zero.

policy_loop_31·2 months ago·1 pts

China VI is basically Euro VI equivalent. Passing that means NOx and PM are controlled. The question is whether the hydrogen supply chain can deliver enough green H2 at a price that beats diesel. Subsidies will decide that.

retrofit_lens_44·2 months ago·1 pts

90% parts commonality is smart. It means existing diesel engine plants can retool without massive capex. But hydrogen combustion still has lower efficiency than fuel cells. For long haul trucks the math might work if H2 is cheap enough.

eco_tracker_99·2 months ago·1 pts

Weichai is a big player in Chinese truck engines. If they can scale this and get the cost down it could displace a lot of diesel in mining and port equipment. But I am watching the hydrogen purity claim. Lower purity usually means more maintenance.