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首页> 外文期刊>Fuel >High power performance with zero NOx emission in a hydrogen-fueled spark ignition engine by valve timing and lean boosting
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High power performance with zero NOx emission in a hydrogen-fueled spark ignition engine by valve timing and lean boosting

机译：通过气门正时和稀薄增压实现氢燃料火花点火发动机中NOx排放为零的高功率性能

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摘要

For a hydrogen engine to be successfully commercialized in a short period of time, it must have power on the same level as gasoline engines, almost no NOx emissions, and high efficiency. This simultaneous achievement would be possible with the use of low temperature combustion, which supercharges an ultra-lean mixture, because NOx from a hydrogen engine is thermally produced. However, increasing the energy input for higher output produces backfire, which is a significant problem for hydrogen-fueled engines with external mixture, and why the simultaneous achievement of high output and low-exhaust is not easily accomplished. This research investigated the potential of simultaneously achieving high output, similar to the output of a gasoline engine, without backfire, by using a complex valve timing variation and lean boosting. The study achieved almost zero NOx emission and high efficiency in a single cylinder engine built for research purposes with a valve timing variation system. Experimental results revealed that retarding the intake valve opening timing could control the backfire generated when increasing the output of the hydrogen engine, and the method above is also effective with lean boosting. Stable combustion in the lean region of Φ = 0.2, which can reduce temperature below the NOx generation temperature, was possible due to the large ultra-lean limit of hydrogen. In addition, the exhaust was almost NOx free due to the low temperature combustion, by supercharging the ultra-lean mixture under high power operation similar to that of gasoline. The above results verified that almost pollution-free emission without backfire, and simultaneous high power and efficiency could be achieved in a hydrogen engine through a method of intake valve timing retardation and lean overcharging.
机译：为了使氢发动机在短时间内成功商业化，它必须具有与汽油发动机相同的功率，几乎没有NOx排放并且具有高效率。通过低温燃烧可以同时实现这一目标，因为它会产生氢气发动机产生的NOx，因此可以为超稀薄混合物增压。然而，增加能量输入以获得更高的输出会产生回火，这对于带有外部混合物的氢燃料发动机来说是一个重要的问题，为什么不容易同时实现高输出和低排气。这项研究调查了通过使用复杂的气门正时变化和稀薄增压来同时实现高输出（类似于汽油发动机的输出）而无回火的潜力。该研究在单缸发动机中实现了几乎零的NOx排放并实现了高效率，该发动机是为研究目的而制造的，具有气门正时变化系统。实验结果表明，延迟进气门打开正时可以控制增加氢气发动机输出功率时产生的回火，上述方法对于稀薄增压也有效。由于氢气的超稀薄极限很大，因此可以在Φ= 0.2的稀薄区域中进行稳定燃烧，从而可以将温度降低到NOx生成温度以下。另外，通过在类似于汽油的大功率操作下对超稀薄混合物进行增压，由于低温燃烧，废气几乎不含NOx。以上结果证明，通过进气门正时延迟和稀薄过量充气的方法，氢发动机几乎可以实现无污染排放，没有回火，同时还可以实现高功率和高效率。

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  • 来源
    《Fuel》 |2014年第15期|381-389|共9页
  • 作者

    Jongtai Lee; Kwangju Lee; Jonggoo Lee; Byunghoh Anh;

  • 作者单位

    School of Mechanical Engineering, Sungkyunkwan University, 300, Chunchun-dong, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Republic of Korea;

    Graduate School of Sungkyunkwan University, 300, Clumchun-dong, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Republic of Korea;

    Graduate School of Sungkyunkwan University, 300, Clumchun-dong, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Republic of Korea;

    Graduate School of Sungkyunkwan University, 300, Clumchun-dong, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Republic of Korea;

  • 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

    Hydrogen-fueled engine; Lean boosting; Backfire control; Valve timing; Ultra-low NOx;

    机译：氢燃料发动机;精益提升;逆火控制;气门正时;超低氮氧化物;

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