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Analysis for Influence of Inhomogeneity of Air-Fuel Mixture to Super-Knock Caused by Pre-ignition in Supercharged Direct-Injected SI Engine Based on Numerical Calculation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 01, 2015 by SAE International in United States
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Nowadays, highly super charging is required corresponded to downsizing concept for improving thermal efficiency in direct-injected spark ignition (DISI) engine. However, highly super charging increases the possibility of super-knock caused by pre-ignition. Recently, in many studies, the reason of pre-ignition has been investigated but the reason why pre-ignition leads such strong knocking called super-knock has not been investigated. In DISI engine, it is estimated that there is more inhomogeneity of equivalence ratio and temperature of air-fuel mixture than it in port injection SI engine. In this study, factors which decide self-ignition timing was reviewed and the influence of inhomogeneity of air-fuel mixture to super-knock was investigated based on numerical calculation.
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CitationNegoro, K., Seki, Y., Nishi, M., Iida, N. et al., "Analysis for Influence of Inhomogeneity of Air-Fuel Mixture to Super-Knock Caused by Pre-ignition in Supercharged Direct-Injected SI Engine Based on Numerical Calculation," SAE Technical Paper 2015-01-1866, 2015, https://doi.org/10.4271/2015-01-1866.
- Nozomi Sasaki, Koichi Nakata, Katsunori Kawatake, Shunta Sagawa, Manabu Watanabe, Tadahide Sone: The Effect of Fuel Compounds on Pre-ignition under High Temperature and High Pressure Condition, SAE 2011-01-1984,(2011)
- Dahnz, C., Han, K., Spicher, U., Magar, M. et al., “Investigations on Pre-Ignition in Highly Supercharged SI Engines,” SAE Int. J. Engines 3(1):214-224, 2010, doi:10.4271/2010-01-0355.