Based on the instantaneous heat release rate

the time-frequency analysis of knock combustion was carried out on a self-developed piston-type aviation kerosene engine. The influence of the dual-spark ignition strategy on knock combustion was investigated. The result showed that the excessive heat release rate of the engine in 8.2-14.8 kHz frequency band led to knock combustion. Delaying synchronous phase ignition advance angle reduced the heat release rate in the major frequency band and inhibited knock. With the increase of the asynchronous ignition phase difference of the dual-spark ignition

the knock factor (KF) and the heat release rate in the major frequency band decreased gradually. Increasing ignition energy led to a slight increase in the knock tendency

but it can improve the power performance of the engine to some extent.