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September 16, 2025SAE technical papers on CD-ROM/SAE technical paper series

Combustion Characteristics and Efficiency of a Turbocharged Hydrogen-Fueled Internal Combustion Engine Under Ultra-Lean, High-Load Conditions

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Authors

SASobhan AzizianamiriXTXavier TauziaÉcole Centrale de NantesAMAlain MaiboomÉcole Centrale de Nantes

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Implication

This study demonstrates stable combustion and reduced NOx emissions in hydrogen engines under ultra-lean conditions, highlighting the role of intake pressure.

Key Points

  • Stable combustion was achieved across all tested ultra-lean conditions in the hydrogen engine, indicating high performance.
  • The indicated thermal efficiency peaked near 44% at lambda values around 3, showcasing the engine's efficiency potential.
  • The analysis revealed that increasing lambda reduced wall and exhaust heat losses, but also led to increased unburned fuel and pumping losses.
  • Intake pressure significantly influenced peak in-cylinder pressure and combustion phasing, essential for optimal performance.

Cite This Study

Azizianamiri et al. (2025) studied this question.

synapsesocial.com/papers/68d4566c31b076d99fa5b869https://doi.org/10.4271/2025-24-0048
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Also Consider

Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Experimental study of cycle-by-cycle variations in a spark ignition internal combustion engine fueled with hydrogen2024 · 36 citations
  2. 2Exploring dilution potential for full load operation of medium duty hydrogen engine for the transport sector2023 · 34 citations