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The use of pure methanol as fuel at high compression ratio in a single cylinder gasoline engine

机译：在单缸汽油发动机中以高压缩比使用纯甲醇作为燃料

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摘要

The methanol has greater resistance to knock and it emits lower emissions than neat gasoline. As single cylinder small engines have low compression ratio (CR), and they run with slightly rich mixture, their power are low and emission values are high. The performance can be increased at high CR if these engines are run with fuels which have high octane nμmber. In this study, methanol was used at high CR to increase performance and decrease emissions of a single-cylinder engine. Initially, the engine whose CR was 6/1 was tested with gasoline and methanol at full load and various speeds. Then, the CR was raised from 6/1 to 8/land 10/1, gradually. The knock was not observed at the CRs of 8/1 and 10/1 when using methanol while the knock was observed at the CR of 8/1 when using gasoline. The knock was deter mined from the cylinder pressure-time curves. The results showed that some decreases were obtained in CO, CO_2 and NO_X emissions without any noticeable power loss when using methanol at the CR of 6/1. By increasing the CR from 6/1 to 10/1 with methanol, the engine power and brake thermal efficiency increased by up to 14% and 36%, respectively. Moreover, CO, CO_2 and NO_X emissions were reduced by about 37%, 30% and 22%, respectively.
机译：甲醇具有比纯汽油更高的抗爆震性，并且排放量更低。由于单缸小型发动机的压缩比（CR）低，并且混合气稍微丰富，因此它们的功率较低，排放值较高。如果这些发动机使用具有高辛烷值nummber的燃料运行，则可以在高CR下提高性能。在这项研究中，高CR时使用甲醇来提高单缸发动机的性能并减少其排放。最初，CR为6/1的发动机在满载和各种速度下都用汽油和甲醇进行了测试。然后，CR从6/1逐渐提高到8 / land 10/1。使用甲醇时，在CRs为8/1和10/1时未观察到爆震，而使用汽油时，在CR为8/1时观察到爆震。由汽缸压力-时间曲线确定爆震。结果表明，在CR为6/1的条件下使用甲醇时，CO，CO_2和NO_X排放量有所降低，而没有明显的功率损失。通过使用甲醇将CR从6/1提高到10/1，发动机功率和制动器热效率分别提高了14％和36％。此外，CO，CO_2和NO_X排放量分别减少了约37％，30％和22％。

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  • 来源
    《Fuel》 |2011年第4期|p.1591-1598|共8页
  • 作者

    M. Bahattin Çelik; Bulent OEzdalyan; Faruk Alkan;

  • 作者单位

    Karabuk University, Engineering Faculty, Departmant of Automotive, 78050, Karabuk, Turkey;

    Karabuk University, Technology Faculty, Departmant of Automotive, 78050, Karabuk, Turkey;

    Karabuk University, Institute of Applied Science, 78050, Karabuk, Turkey;

  • 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

    methanol; small spark ignition engine; performance; emission; compression ratio;

    机译：甲醇小型火花点火发动机;性能;发射;压缩率;

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