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Electrical Waveform Measurement of Spark Energy and its Effect on Lean Burn SI Engine Combustion
ISSN: 2641-9637, e-ISSN: 2641-9645
Published December 19, 2019 by SAE International in United States
Citation: Yu, X., Zhu, H., Zheng, M., and Li, L., "Electrical Waveform Measurement of Spark Energy and its Effect on Lean Burn SI Engine Combustion," SAE Int. J. Adv. & Curr. Prac. in Mobility 2(1):292-300, 2020, https://doi.org/10.4271/2019-01-2159.
The conventional transistor coil ignition system with coil-out energy up to 100 mJ might not be sufficient to establish a self-sustained flame kernel under lean combustion with strong in-cylinder flow motion. Further increase of the discharge current will decrease the voltage across the spark gap, which will affect the calculation of the energy delivered to the spark gap. In this paper, the relationship between the discharge current and gap voltage is investigated, and it is discovered that the spark energy doesn,t increase monotonously with the increase of the discharge current. However, engine test results still indicate a positive impact of discharge current amplitude on the engine performance.