Abstract
In order to clarify the possibility of spark assisted compression-ignition (SI-CI) combustion, experiments were made by using the rapid compression/expansion machine (RCEM) which provides advantages compared to conventional engine for its completely homogeneous charge preparation and its simplicity of the setting of engine condition. Combustion processes of low octane number fuels and hydrogen were investigated by analyzing in-cylinder pressure and heat-release rate. Primary reference fuels (PRFs) with hydrogen addition were used to alter octane number RON and hydrogen ratio r H at a fixed equivalence ratio φ = 0.45, compression ratio ε = 13 and spark timing θ i = −20°ATDC. The rates of heat release are greatly changed by RON and r H. From the results of systematic tests for various RON and r H, the criteria of HCCI combustion, SI combustion and SI-CI combustion were exhibited. In the case of further hydrogen addition, combustion was completed with a simple SI form. Based on the combustion characteristics for various conditions, the feasibility and advantage of SI-CI combustion are discussed.
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Rey, S., Morisita, H., Noda, T., Shioji, M. (2010). Investigation of SI-CI Combustion with Low Octane Number Fuels and Hydrogen using a Rapid Compression/Expansion Machine. In: Yao, T. (eds) Zero-Carbon Energy Kyoto 2009. Green Energy and Technology. Springer, Tokyo. https://doi.org/10.1007/978-4-431-99779-5_31
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DOI: https://doi.org/10.1007/978-4-431-99779-5_31
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-99778-8
Online ISBN: 978-4-431-99779-5
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