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EGR對(duì)電噴LPG發(fā)動(dòng)機(jī)燃燒過(guò)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(duì)LPG燃?xì)庠谙∪紬l件下的燃燒,、排放以及循環(huán)變動(dòng)率的影響,。結(jié)果表明,，基于高能雙火花塞點(diǎn)火的快速燃燒系統(tǒng)可以加快LPG燃?xì)獾娜紵俾剩行У馗纳埔隕GR的LPG發(fā)動(dòng)機(jī)的快速燃燒過(guò)程,。在整個(gè)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(shí)抑制了發(fā)動(dòng)機(jī)因高溫而生成的NOx,。同時(shí),，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(guò)程的循環(huán)變動(dòng)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(duì)電噴LPG發(fā)動(dòng)機(jī)燃燒過(guò)程及NOx排放的影[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),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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