Southwest Research Institute launched the Hydrogen Internal Combustion Engine 2 (H2-ICE2) Consortium to help the automotive and transportation industries understand and address technical challenges in developing hydrogen vehicles. A test stand at SwRI was used to develop a hydrogen engine for a Class 8 vehicle. (Image: SwRI)

Zero-carbon fuels are gaining momentum for hard-to-electrify mobility sectors as well as for stationary power generation. Hydrogen internal combustion engines are staking their claim as a future pathway for long-haul trucking, heavy off-highway machines, maritime vessels, and gensets.

Test your knowledge about hydrogen combustion engines in this quiz. And tune in to SAE Media Group®’s February 2026 webinar  on the topic to learn more directly from the experts developing the technology.