03:50 pm - 04:10 pm Spectroscopy of Flame Kernel Inception During Ultra-Lean Operation of An Optically Accessible Spark Ignition Engine Fueled with Hydrogen S. S. Merola, A. Irimescu, B. M. Vaglieco - CNR - STEMS 04:10 pm - 04:30 pm Analysis and Visualization of Hydrogen Combustion in a Spark Ignition Optical Access Engine M. Avana, F. Ricci, J. Zembi, C. N. Grimaldi, M. Battistoni - Universita degli Studi di Perugia; S. Papi - FEDERAL-MOGUL ITALY 04:30 pm - 04:50 pm Guided Port Injection of Hydrogen as An Approach for Reducing Cylinder-To-Cylinder Deviations in Spark-Ignited H2 Engines – A Numerical Investigation P. E. Jung, M. Guenthner, N. Walter -RPTU University of Kaiserslautern-Landau (Paper # 2024-37-0008) 04:50 pm - 05:10 pm Experimental and Numerical Investigation of Abnormal Combustion Phenomena in a High-Performance Hydrogen Fueled DISI Engine operated in stochiometric Conditions L. Rolando, S. Roggio, A. Piano, F. Millo - Politecnico di Torino; F. Gullino, F. Mortellaro, R. Tonelli, M. Medda - Ferrari