Abstract A bio-syngas, produced from wood biomass gasification, is used with a small reciprocated spark ignition engine for higher thermal efficiency. In this experiment, as the knocking doesn’t occur even though the ignition timing is 70 deg-BTDC (before top dead center), the MBT, most-advanced for best torque ignition timing, couldn’t be determined. This phenomena, without knocking combustion, are reported by several researchers. In this report, the way to determine the ignition timing for the maximum efficiency is shown. With the cylinder pressure measurement, when the maximum heat release rate position is set near TDC, top dead center, the thermal efficiency shows the maximum and the stability shows the best in any hydrogen fraction or any methane fraction of the mixed fuel.Po.

中文翻译：

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生物合成气中氢气和甲烷组分对小型往复式内燃机稳定性的影响

摘要 木材生物质气化产生的生物合成气与小型往复式火花点火发动机配合使用，具有更高的热效率。在本实验中，由于即使点火正时为 70 度-BTDC（上止点之前）也不会发生爆震，因此无法确定 MBT，即最佳扭矩点火正时的最先进值。一些研究人员报告了这种现象，而不是爆震燃烧。在本报告中，显示了确定最大效率的点火正时的方法。用气缸压力测量，当最大放热率位置设置在TDC，上止点附近时，混合燃料的任何氢馏分或任何甲烷馏分的热效率显示最大，稳定性最好。