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Knock rating of gaseous fuels in a single cylinder spark ignition engine

机译:单缸火花点火发动机中气体燃料的爆震等级

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This paper presents the determination of knock rating of gaseous fuels in a single cylinder engine. The first part of the work deals with an application of a standard method for the knock rating of gaseous fuels. The Service Methane Number (SMN) is compared with the standard Methane Number (MN) calculated from the standard AVL software METHANE (which corresponds to the MN measured on a Cooperative Fuel Research engine). Then, in the second part, the 'mechanical' resistance to knock of our engine is highlighted by means of the Methane Number Requirement (MNR). A single cylinder LISTER PETTER engine was modified to run as a spark ignition engine with a fixed compression ratio and an adjustable spark advance. Effects of engine settings on the MNR are deduced from experimental data and compared extensively with previous studies. Using the above, it is then possible to adapt the engine settings for optimal knock control and performances. The error on the SMN and MNR stands beneath +- 2 MN units over the gases and engine settings considered.
机译:本文介绍了单缸发动机中气体燃料爆震等级的确定。这项工作的第一部分涉及一种用于气态燃料爆震等级的标准方法的应用。将服务甲烷值(SMN)与从标准AVL软件METHANE(对应于在合作燃料研究引擎上测得的MN)计算出的标准甲烷值(MN)进行比较。然后,在第二部分中,通过甲烷号要求(MNR)突出显示了发动机的机械抗爆震性。单缸LISTER PETTER发动机经过改装,可作为具有固定压缩比和可调节火花提前量的火花点火发动机运行。从实验数据推论出发动机设置对MNR的影响,并与以前的研究进行了广泛的比较。使用以上所述,然后可以调整发动机设置以获得最佳的爆震控制和性能。对于所考虑的气体和发动机设置,SMN和MNR上的误差低于±2 MN单位。

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