In order to improve the energy efficiency and suppress the environmental pollutants of marine diesel engines, analysis and control of combustion phases including late combustion phase and premixed combustion phase are considered as an attractive potential strategy. Consequently, it is necessary to accurately identify the combustion parameters that are representative to these combustion phases, such as start of combustion (SOC), start of diffusive combustion (SODC) and start of late combustion (SOLC). The real-time analysis of the combustion phases can be further applied for closed-loop combustion control (CLCC). However, the existing methods can’t guarantee the accurate detection of combustion parameters simultaneously even though high computational resources are invested. In this study, the resonance excitation of in-cylinder pressure was found to be capable for identifying all of the three combustion phases parameters. Hence, several effective signal processing techniques were proposed to detect these combustion phases parameters from resonant pressure signal. Without complex mathematic algorithms, the proposed method shows high potential for CLCC since it is relatively easier and faster to achieve than other existing techniques. The accuracy of this method was validated by experimental heat release rate and in-cylinder temperature. Furthermore, based on combustion phase parameters obtained, the estimations of combustion state and energy efficiency were discussed. Finally, this method was also applied for combustion phase detection in another type of marine diesel engine, which verified the robustness of this method.

为了提高船用柴油机的能源效率和抑制环境污染物，包括后期燃烧阶段和预混燃烧阶段在内的燃烧阶段的分析和控制被认为是一种有吸引力的潜在策略。因此，有必要准确识别代表这些燃烧阶段的燃烧参数，例如燃烧开始 (SOC)、扩散燃烧开始 (SODC) 和延迟燃烧开始 (SOLC)。燃烧阶段的实时分析可以进一步应用于闭环燃烧控制 (CLCC)。然而，现有的方法即使投入了大量的计算资源，也不能保证同时准确检测燃烧参数。在这项研究中，发现缸内压力的共振激发能够识别所有三个燃烧阶段参数。因此，提出了几种有效的信号处理技术来从共振压力信号中检测这些燃烧阶段参数。在没有复杂数学算法的情况下，所提出的方法显示出 CLCC 的巨大潜力，因为它比其他现有技术更容易和更快地实现。通过实验放热率和缸内温度验证了该方法的准确性。此外，基于获得的燃烧阶段参数，讨论了燃烧状态和能量效率的估计。最后，将该方法应用于另一种船用柴油机的燃烧相位检测，验证了该方法的鲁棒性。