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EGR對柴油機工作過程影響的一維模擬
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    摘要:

    根據(jù)柴油機的基本結(jié)構(gòu)，利用BOOST軟件建立帶有EGR系統(tǒng)增壓直噴柴油機一維工作模型,。將柴油機臺架試驗獲得的最佳EGR率MAP圖作為一維模型中EGR控制單元的控制MAP圖,，建立了模擬形式下EGR系統(tǒng)控制單元,，實現(xiàn)了柴油機在使用EGR后,，不同工況EGR率在柴油機轉(zhuǎn)速和負荷連續(xù)變化形式下,，EGR對柴油機工作全過程影響的一維模擬。以柴油機轉(zhuǎn)速1900r/min、10%負荷工況點為例,，模擬計算結(jié)果表明，柴油機在使用EGR后空燃比,、缸壓,、缸內(nèi)溫度和排氣溫度都有所下降，缸內(nèi)氣體質(zhì)量有所增加,，與柴油機臺架試驗獲得的結(jié)論吻合,。

    Abstract:

    According to the basic structure of diesel engine, 1-dimensional model of TDI diesel engine with EGR system was established. An EGR control unit was constructed using the optimum EGR rates map of diesel engine test experiment as control map of EGR control unit.Subsequently, a 1-dimensional simulation about the influence of EGR on the whole operating process of diesel engine was carried out, and it was realized that EGR rates was continuously changing with diesel engine rotate speed and load when EGR was used in diesel engine. Taking diesel engine rotate speed 1900r/min and load 10% as an example, the simulation results show that A/F ratio, cylinder pressure, the temperature in the cylinder and exhaust gas temperature are decreased and the gas mass in the cylinder is increased when EGR is used in the diesel engine. All conclusions of simulation are identical with that of the diesel engine test experiment.

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楊帥,周毅,鄒任玲,劉繼躍,徐慧星,董安琪. EGR對柴油機工作過程影響的一維模擬[J].農(nóng)業(yè)機械學報,2008,39(11):1-5.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(11):1-5.

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