The characterization of the single-coil repetitive discharge and the dual-coil offset discharge was conducted in a constant volume combustion chamber to better understand the operating principle of the multi-event spark ignition strategies. A parametric study of the dual-coil offset discharge was carried out through electric and optical diagnosis to identify the effective operational parameters, including coil working frequency, charging voltage, and coil inductances. Combustion tests under both quiescent and flow conditions with methane-air mixture were performed to demonstrate the ignition capability of the dual-coil offset strategy. Test results have shown that constantly depositing spark energy through offset discharge is beneficial to secure flame kernel. However, the offset discharge strategy requires a high working frequency, an elevated charging voltage, and fast reacting coils to maintain the spark plasma channel under high background pressure and intensified flow conditions.

在恒定容积的燃烧室中进行了单线圈重复放电和双线圈偏移放电的表征，以更好地理解多事件火花点火策略的工作原理。通过电气和光学诊断对双线圈偏移放电进行了参数研究，以确定有效的工作参数，包括线圈工作频率，充电电压和线圈电感。进行了甲烷和空气混合物在静态和流动条件下的燃烧试验，以证明双线圈补偿策略的点火能力。测试结果表明，通过补偿放电不断沉积火花能量对确保火焰核有利。但是，补偿放电策略需要较高的工作频率，