...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>日本マリンエンジニアリング学会誌 >Effect of Injection Pattern on Neat Jatropha Oil Combustion in Direct Injection Diesel Engine
【24h】

Effect of Injection Pattern on Neat Jatropha Oil Combustion in Direct Injection Diesel Engine

机译：喷射方式对直喷柴油机净麻疯树油燃烧的影响

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

The use of bio-fuels has attracted attention as a promising approach to reduce CO_2. While many bio-fuels come from food crops, Jatropha which is inedible has been the focus of interest recently. Jatropha oil has, however, high viscosity and low volatility which would influence the emission characteristics and fuel consumption, especially in the low load engine condition. Electrically controlled fuel injection seems to be effective to improve the combustion of such fuels. However, the combustion characteristics of Jatropha fueled diesel engine with a fully electrically controlled fuel injection system which can vary the injection pattern in a wide range have not been investigated. In this study, experimental research has been conducted to investigate the effects of double injections with various injection timings, and amount of after-injection on the combustion, engine performance, and emission characteristics in a high speed, 4-stroke diesel engine fueled with neat Jatropha oil. Retarding main- and after-injection timings significantly reduced the peak combustion pressures and peak heat release rate; slightly reduced ignition delay; and shifted the combustion to the later phase. Retarded double injection timings reduced emissions of NO_x, while increasing dust, smoke, CO, CO_2, and HC. Large amounts of the fuel in after-injections significantly reduced combustion pressures and rates of heat release at lower and medium loads. In addition, large amounts of the fuel in after-injections reduced thermal efficiency and increased emissions of CO_2, CO, smoke, and dust concentration, while reducing HC and NO_x emissions.
机译：作为减少CO_2的一种有前途的方法，生物燃料的使用已引起关注。尽管许多生物燃料都来自粮食作物，但近年来难以引起人们关注的是不可食用的麻风树。然而，麻风树油具有高粘度和低挥发性，这会影响排放特性和燃料消耗，特别是在低负荷发动机工况下。电控燃料喷射似乎对改善这种燃料的燃烧是有效的。但是，尚未研究具有可在很大范围内改变喷射方式的完全电控燃料喷射系统的麻风树燃料柴油发动机的燃烧特性。在这项研究中，已经进行了实验研究，以研究不同喷射正时的双重喷射以及后喷射量对以纯净燃料为燃料的高速四冲程柴油机的燃烧，发动机性能和排放特性的影响。麻风树油。延迟主喷射和后喷射正时显着降低了峰值燃烧压力和峰值放热率。稍微减少点火延迟;并将燃烧转移到后期阶段延迟的双喷射正时减少了NO_x的排放，同时增加了粉尘，烟雾，CO，CO_2和HC。后喷射中的大量燃料显着降低了燃烧压力和中低负荷时的放热率。此外，后喷射中大量的燃料降低了热效率并增加了CO_2，CO，烟雾和粉尘浓度的排放，同时减少了HC和NO_x的排放。

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