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EGR對電噴LPG發(fā)動機燃燒過程及NOx排放的影
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of EGR on Burning Process and NOx Emission of Electronic Controlled LPG Injection SI Engine
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    摘要:

    研究了EGR率的變化對LPG燃氣在稀燃條件下的燃燒、排放以及循環(huán)變動率的影響,。結(jié)果表明,，基于高能雙火花塞點火的快速燃燒系統(tǒng)可以加快LPG燃氣的燃燒速率，有效地改善引入EGR的LPG發(fā)動機的快速燃燒過程,。在整個有效廢氣再循環(huán)率（REGR）范圍內(nèi)LPG稀燃稀限得到較大幅度提高,，同時抑制了發(fā)動機因高溫而生成的NOx。同時,，采用快速燃燒系統(tǒng)的最大REGR為8.11%,，大于普通方式的5%；LPG燃燒過程的循環(huán)變動也得到有效控制,。

    Abstract:

    This study was focused on the impact of the changes of the EGR rate on combustion, emissions and the coefficient of variation of LPG engine at lean burn conditions. Test data showed that dual-spark plug-based rapid burning system increased the combustion heat release of LPG mixture, and improved the rapid burning process of LPG engine with EGR. Meanwhile, the excess air ratio limits of LPG leanburning was largely extended within the total effective range of EGR rate（REGR）. At the equivalent running conditions of LPG engine, largely extended REGR restrained the formation of NOx emission by high combustion temperature. The highest REGR of rapid combustion process was increased from 5% to 811% of normal combustion process. Additionally, the coefficient of variation of LPG combustion process got control effectively.

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胡春明,劉娜,李偉,宋璽娟. EGR對電噴LPG發(fā)動機燃燒過程及NOx排放的影[J].農(nóng)業(yè)機械學報,2009,40(8):18-22. of EGR on Burning Process and NOx Emission of Electronic Controlled LPG Injection SI Engine[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(8):18-22.

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