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Performance and emissions of a modified small engine operated on producer gas

机译：使用生产气运行的改进型小型发动机的性能和排放

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Existing agricultural biomass may be upgraded converted to a gaseous fuel via a downdraft gasifier for spark ignition engines. In this work, a 0.6 L, naturally aspirated single cylinder compression ignition engine was converted into a spark ignition engine and coupled to a 5 kW dynamometer. The conventional swirl combustion chamber was replaced by a cavity chamber. The effect of variable compression ratios between 9.7 and 17:1, and engine speeds between 1000 and 2000 rpm and loads between 20% and 100% of engine performance were investigated in terms of engine torque, power output, thermal efficiency, specific fuel consumption and emissions. It was found that the modified engine was able to operate well with producer gas at higher compression ratios than with gasoline. The brake thermal efficiency was lower than the original diesel engine at 11.3%. Maximum brake power was observed to be 3.17 kW, and the best BSFC of 0.74 kg/kWh was achieved. Maximum brake thermal efficiency of 23.9% was obtained. The smoke density of the engine was lower than the diesel engine, however, CO emission was higher with similar HC emission.
机译：现有的农业生物质可以通过用于火花点火发动机的下流气化炉进行升级，转化为气态燃料。在这项工作中，将0.6升自然吸气单缸压缩点火发动机转换为火花点火发动机，并连接到5 kW测功机。常规的涡流燃烧室被腔室代替。从发动机扭矩，功率输出，热效率，比油耗和油耗等方面研究了可变压缩比在9.7和17：1之间，发动机转速在1000和2000 rpm之间以及负载在发动机性能的20％和100％之间的影响。排放。结果发现，该改进型发动机能够以较高的压缩比（比汽油）更高的生产气运行。制动热效率比原始柴油发动机低11.3％。观察到最大制动功率为3.17 kW，并且获得了0.74 kg / kWh的最佳BSFC。获得的最大制动热效率为23.9％。发动机的烟气密度低于柴油发动机，但是，与HC排放相似，CO排放较高。

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