Effects of Engine Operating Condition and Fuel Property on Pre-Ignition Phenomenon in a Highly Boosted Premixed Natural Gas Engine 2019-01-2154
The stochastic pre-ignition phenomenon plays a vital role to limit the further increasing BMEP for natural gas engines. In this study, the pre-ignition propensities were examined in a highly boosted premixed natural gas engine by various engine loads and air/fuel ratios, as well as different methane number (MN) altered by hydrogen addition. A proper pre-ignition evaluation method was proposed referring to intake temperature. Moreover, the limits of in-cylinder temperature and pressure for the onset of pre-ignition were estimated. The results show that both higher IMEP and richer mixture conditions readily lead to pre-ignition. The significant increases of pre-ignition frequency and heavy-knocking pre-ignition cycle present with lowering MN.
Citation: Chen, R., Kuboyama, T., Moriyoshi, Y., Yasueda, S. et al., "Effects of Engine Operating Condition and Fuel Property on Pre-Ignition Phenomenon in a Highly Boosted Premixed Natural Gas Engine," SAE Technical Paper 2019-01-2154, 2019, https://doi.org/10.4271/2019-01-2154. Download Citation
Run Chen, Tatsuya Kuboyama, Yasuo Moriyoshi, Shinji Yasueda, Valerie Doyen, Jean-Baptiste Martin
Chiba University, GDEC Inc., Total S.A.
2019 JSAE/SAE Powertrains, Fuels and Lubricants