• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Proceedings of the 2009 spring technical conference of the ASME Internal Combustion Engine Division >CHARACTERIZATION OF PARTIALLY PREMIXED COMBUSTION WITH ETHANOL: EGR SWEEPS, LOW AND MAXIMUM LOADS
【24h】

CHARACTERIZATION OF PARTIALLY PREMIXED COMBUSTION WITH ETHANOL: EGR SWEEPS, LOW AND MAXIMUM LOADS

机译：乙醇部分预混燃烧的特性：废气再循环，低负荷和最大负荷

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

EGR sweeps were performed on Ethanol Partially Premixed Combustion, PPC, to show different emission and efficiency trends as compared to Diesel PPC. The sweeps showed that increasing the EGR rate the efficiency does not diminish, HC trace is flat and CO is low even with 45% of EGR. NOx exponentially decreases by increasing EGR while soot levels are nearly zero throughout the sweep. The EGR sweeps underlined that at high EGR levels, the pressure rise rate is a concern. To overcome this problem and keep high efficiency and low emissions a sweep in timing of the pilot injection and pilot-main ratio was done at ～16.5 bar gross IMEP. It was found that with a pilot-main ratio of 50-50 and by placing the pilot at -60 with 42% of EGR, NOx and soot are below EURO VI levels, the indicated efficiency is 47% and the maximum pressure rise rate is below 10 bar/CAD. Low load conditions were examined as well. It was found that by placing the SOI at -35 TDC the efficiency is maximized on the other hand when the injection is at -25 the emissions are minimized and the efficiency is only 1.64% lower than its optimum value. The idle test also showed that a certain amount of EGR is needed in order to minimize the pressure rise rate.
机译：在乙醇部分预混燃烧PPC上进行EGR扫查，以显示与柴油PPC相比不同的排放和效率趋势。扫描显示，即使有45％的EGR，提高EGR率的效率也不会降低，HC痕迹平坦并且CO较低。通过增加EGR，NOx呈指数下降，而在整个扫描过程中烟灰水平几乎为零。 EGR扫描强调，在较高的EGR水平下，压力上升速率是一个问题。为了克服这个问题并保持高效率和低排放，在总IMEP约为16.5 bar的情况下对引燃喷射和引燃主比的时间进行了扫描。发现先导主比为50-50，将先导置于-60且EGR为42％，NOx和烟灰低于EURO VI，指示效率为47％，最大压力上升率为低于10 bar / CAD。还检查了低负载条件。已发现，通过将SOI置于-35 TDC，效率最高，而在注入温度为-25时，排放量最小，效率仅比其最佳值低1.64％。怠速测试还显示，需要一定量的EGR，以最大程度地降低压力上升率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号