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首页> 外文期刊>Mechanical systems and signal processing >Combustion phase identification for closed-loop combustion control by resonance excitation in marine diesel engines
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Combustion phase identification for closed-loop combustion control by resonance excitation in marine diesel engines

机译：封锁封闭燃烧对船舶柴油机共振激励的燃烧相位识别

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摘要

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.
机译：为了提高能源效率和抑制船用柴油发动机的环境污染物，包括晚燃烧相和预混燃烧阶段的燃烧阶段的分析和控制被认为是有吸引力的潜在策略。因此，有必要准确地识别代表这些燃烧相的燃烧参数，例如燃烧（SOC）的开始，扩散燃烧（SODC）的开始和后期燃烧（Solc）的开始。燃烧相的实时分析可以进一步应用于闭环燃烧控制（CLCC）。然而，即使投资了高计算资源，现有方法也无法确保同时对燃烧参数进行准确检测。在该研究中，发现缸内压力的共振激发能够识别所有三个燃烧相参数。因此，提出了几种有效信号处理技术以检测来自谐振压力信号的这些燃烧相的参数。如果没有复杂的数学算法，所提出的方法显示了CLCC的高潜力，因为它比其他现有技术相对容易且更快地实现。通过实验热释放速率和缸内温度验证了该方法的准确性。此外，基于获得的燃烧相参数，讨论了燃烧状态和能效的估计。最后，该方法还应用于另一种船用柴油发动机中的燃烧相检测，验证了这种方法的鲁棒性。

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