Abstract：To solve the problems of existing lag angle between the phase combustion parameters identified by vibration signal and cylinder pressure signal and of existing different lag angles under different working conditions, the parameters for characterizing the high-frequency harmonics of in-cylinder pressure signal were investigated. The S-transformation of cylinder pressure was analyzed to determine the range of frequency distribution caused by the combustion excitation. The one-dimensional simulation model of the single-cylinder diesel engine was established to analyze the maximum pressure. The results show that the maximum pressure rise rate, the peak pressure, the ratio of the maximum pressure rise rate to the interval between the start of combustion and the maximum pressure rise rate and the interval between the start of combustion and the peak pressure are approximately linear to the high frequency energy of the cylinder pressure signal. In the vibration velocity signal, the corresponding parameters of pirA′B′,pirA′B′δφ′ and δθ′ can be used to represent the high-frequency energy. A reference is provided for correcting lag angle based on characteristic parameters of vibration velocity signals.
赵秀亮, 孔令沂, 汪若尘, 李小华, 王丽梅. 缸内压力信号中燃烧激励引起高频谐波的特征参数[J]. 江苏大学学报（自然科学版）, 2020, 41(2): 187-191.
ZHAO Xiuliang, KONG Lingyi, WANG Ruochen, LI Xiaohua, WANG Limei. Characteristic parameters of high frequency harmonics caused by combustion excitation in cylinder pressure signal[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2020, 41(2): 187-191.
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2020, Vol. 41 
