Effects of Ignition Timing and Fuel Chemical Composition on Autoignition Behavior and Knocking Characteristics under Lean Conditions 2022-32-0070
This study focused on autoignition behavior and knocking characteristics. Using an optically accessible engine, autoignition behavior was observed over the entire bore area, and the relationship between autoignition behavior and knocking characteristics was clarified on the basis of visualized combustion images and frequency analysis of the in-cylinder pressure waveform. In addition, chemical kinetic simulations were used to investigate the effects of different fuel chemical compositions on combustion and autoignition characteristics under equivalent octane ratings. The results showed that the rate of autoignition development has a significant effect on knocking intensity. In addition, the ρ1,0 mode is the dominant vibration mode caused by knocking, regardless of the location of autoignition. It can be inferred that strong knocking is caused by multiple vibration modes. Furthermore, chemical kinetic simulation results and experimental data show that different fuel chemical compositions affect the onset of autoignition.
Citation: Shirane, K., Kimura, T., Nakamura, S., Furusyo, K. et al., "Effects of Ignition Timing and Fuel Chemical Composition on Autoignition Behavior and Knocking Characteristics under Lean Conditions," SAE Int. J. Adv. & Curr. Prac. in Mobility 5(5):1745-1751, 2023, https://doi.org/10.4271/2022-32-0070. Download Citation
Author(s):
Kaede Shirane, Toshiki Kimura, Sota Nakamura, Karin Furusyo, Akira Iijima
Affiliated:
Graduate School of Science and Technology, Nihon University, College of Science and Technology, Nihon University
Pages: 7
Event:
The 26th Small Powertrains and Energy Systems Technology Conference
e-ISSN:
2641-9645
Also in:
SAE International Journal of Advances and Current Practices in Mobility-V132-99EJ
Related Topics:
Ignition timing
Knock
Combustion and combustion processes
Chemicals
Engines
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