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柴油機各缸工作不均勻性對Nox排放量的影響
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    摘要:

    采用高速數(shù)據(jù)采集系統(tǒng)實測直噴式柴油機氣缸壓力，通過氣缸壓力計算分析燃燒放熱規(guī)律，建立了由放熱率預(yù)測直噴式柴油機Nox排放的模型,并驗證了該模型的精度與準確性。通過實測多缸柴油機各缸壓力，利用該模型計算各缸在各工況下的Nox排放，分析了柴油機各缸工作不均勻性對Nox排放的影響。結(jié)果表明，多缸機由于各缸壓力不均勻，其Nox排放量有一定的差別，氣缸壓力大，Nox排放量也大；降低柴油機各缸工作不均勻性可降低

    Abstract:

    Nox排放量。 The cylinder pressure has great influence on the power, economy and emission of a diesel engine. High-speed data collection system was applied to measure cylinder pressure of DI diesel engine, combustion heat release rate has been calculated and analyzed by the cylinder pressure, the model of Nox emission by the measured cylinder pressure of DI diesel engine was established. The model accuracy has been proved by the experiment. The Nox emissions of each cylinder at different speeds and loads have been calculated by the measured cylinder pressure of each cylinder of a multi-cylinder DI diesel engine with this model. The influence of cylinder-to-cylinder variation to Nox emission was analyzed. It is found that if the cylinder pressure is larger, the Nox emission of this cylinder is larger. The Nox emission of the multi-cylinder diesel engine could be reduced when the cylinder-to-cylinder pressure variation reduces.

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羅福強,劉浩龍,湯東,梁昱.柴油機各缸工作不均勻性對Nox排放量的影響[J].農(nóng)業(yè)機械學(xué)報,2007,38(2):65-68.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(2):65-68.

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