Developing Hydrogen Fueled SI-ICE for Heavy Duty Applications

Authors

J. Ängeby, SEM AB, Åmål; J. Wärnberg, Volvo Group Trucks Technology, Gothenborg; Ö. Andersson, M. Richter, P. Tunestål, Lund University

Year

2025

Print Info

Production/Publication ÖVK

Summary

This paper provides an overview of the challenges associated with H₂ SI-ICE development, including a brief introduction to Volvo Group’s 17L H₂ engine prototype. Additionally, it presents a general overview of ignition system design and recent advancements in a novel ignition system, FlexiSpark®, developed by SEM AB. FlexiSpark® features real-time spark diagnostics and precise control of spark current and duration, enabling robust ignition while minimizing spark plug wear. This system has the potential to significantly reduce TCO, as experimental research has demonstrated that very short-duration, low-energy sparks are sufficient for ignition at medium and high loads, whereas longer spark durations are required for idling and highly diluted fuel mixtures. A closed-loop spark control strategy utilizing FlexiSpark® is proposed to address these variations. The collaboration between industry and academia has proven valuable in advancing H₂ SI-ICE technology. Ongoing research at Lund University is briefly presented, covering diffusion-controlled combustion, spark ignition, and electrode wear. Studies employing energy transfer from the spark to the fuel mixture and laser-assisted optical diagnostics are investigating real-time effects on ignition and spark plug electrode wear, respectively. By conducting such temporal studies of spark-assisted ignition and electrode wear mechanisms—including evaporation, droplet ejection, and particle emission— this research aims to develop improved spark ignition control strategies for H₂ SI-ICE, further enhancing efficiency, reliability, and durability.

ISBN

978-3-9504969-4-9

DOI

https://doi.org/10.62626/uwtj-fzdk Copy link

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