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首页> 外文期刊>Energy Conversion & Management >Characterization of combustion anomalies in a hydrogen-fueled 1.4L commercial spark-ignition engine by means of in-cylinder pressure, block-engine vibration, and acoustic measurements
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Characterization of combustion anomalies in a hydrogen-fueled 1.4L commercial spark-ignition engine by means of in-cylinder pressure, block-engine vibration, and acoustic measurements

机译：通过缸内压力，缸体发动机振动和声学测量来表征1.4L氢燃料商业商用火花点火发动机的燃烧异常

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摘要

Abnormal combustion phenomena are among the main hurdles for the introduction of hydrogen in the transportation sector through the use of internal combustion engines (ICEs). For that reason the challenge is to guarantee operation free from combustion anomalies at conditions close to the ones giving the best engine output (maximum brake torque and power). To this end, an early and accurate detection of abnormal combustion events is decisive in order to allow the electronic control unit deciding suitable correcting actions. In this work, an automotive size 4-cylinder 1.4 L naturally aspirated port-fuel injection spark ignition Volkswagen engine adapted to run on hydrogen has been investigated. Three distinct methods (in-cylinder pressure, block engine vibration and acoustic measurements) have been employed to detect abnormal combustion phenomena provoked through the enrichment of the hydrogen-air mixture fed to the cylinders under a wide range of engine speeds (1000-5000 rpm). It has been found that the high-frequency components of the in-cylinder pressure and block engine acceleration signals obtained after a Fourier transform analysis can be used for very sensitive detection of knocking combustion cycles. In the case of the ambient noise measurements, a spectral analysis in terms of third octave bands of the signal recorded by a microphone allowed an accurate characterization. Combustion anomalies could be detected through more intense octave bands at frequencies between 250 Hz and 4 kHz in the case of backfire and between 8 kHz and 20 kHz for knock. Computational fluid dynamics simulations performed indicated that some characteristics of the engine used such as the cylinder valves dimensions and the hydrogen flow rate delivered by the injectors play important roles conditioning the likelihood of suffering backfire events.
机译：通过使用内燃机（ICE），异常燃烧现象是在运输领域引入氢的主要障碍之一。因此，面临的挑战是如何确保在接近最佳发动机输出功率（最大制动扭矩和功率）的条件下，燃烧无异常。为此，决定性的是，尽早而准确地检测出异常燃烧事件，以便使电子控制单元可以决定适当的纠正措施。在这项工作中，已经研究了一种汽车大小的4缸1.4升自然吸气式进气道燃料喷射火花点火式大众发动机，该发动机适用于氢气。已经采用了三种不同的方法（缸内压力，发动机缸体振动和声学测量）来检测异常的燃烧现象，这种异常的燃烧现象是通过在宽范围的发动机转速（1000-5000 rpm）下充入气缸中的氢气混合物来引起的）。已经发现，在傅里叶变换分析之后获得的缸内压力和缸体发动机加速信号的高频分量可以用于爆震燃烧循环的非常灵敏的检测。在环境噪声测量的情况下，根据麦克风记录的信号的第三个八度音阶进行频谱分析，可以进行准确的表征。在回火的情况下，可以通过在250 Hz至4 kHz之间的频率上的更强的八度频段检测燃烧异常，而对于爆震则可以在8 kHz至20 kHz的频率上检测到燃烧异常。进行的计算流体动力学模拟表明，所用发动机的某些特性（例如气缸气门尺寸和喷油器输送的氢气流速）在调节遭受逆火事件的可能性方面起着重要作用。

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  • 来源
    《Energy Conversion & Management》 |2018年第9期|67-80|共14页
  • 作者

    Dieguez P. M.; Urroz J. C.; Sainz D.; Machin J.; Arana M.; Gandia L. M.;

  • 作者单位

    Univ Publ Navarra, Sch Ind & ICT Engn, Campus Arrosadia, E-31006 Pamplona, Spain;

    Univ Publ Navarra, Sch Ind & ICT Engn, Campus Arrosadia, E-31006 Pamplona, Spain;

    Univ Publ Navarra, Sch Ind & ICT Engn, Campus Arrosadia, E-31006 Pamplona, Spain;

    Univ Publ Navarra, Sch Ind & ICT Engn, Campus Arrosadia, E-31006 Pamplona, Spain;

    Univ Publ Navarra, Sch Ind & ICT Engn, Campus Arrosadia, E-31006 Pamplona, Spain;

    Univ Publ Navarra, Sch Ind & ICT Engn, Campus Arrosadia, E-31006 Pamplona, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Backfire; Hydrogen internal combustion engine; Knock; Noise; Pre-ignition;

    机译：逆火;氢内燃机;爆震;噪声;预点火;

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