• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>SAE International Powertrains, Fuels Lubricants Meeting >Efficiency and Emissions Mapping of a Light Duty Diesel - Natural Gas Engine Operating in Conventional Diesel and RCCI Modes
【24h】

Efficiency and Emissions Mapping of a Light Duty Diesel - Natural Gas Engine Operating in Conventional Diesel and RCCI Modes

机译：常规柴油机和RCCI模式运行轻型柴油 - 天然气发动机的效率和排放映射

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Reactivity Controlled Compression Ignition (RCCI) is a promising dual-fuel Low Temperature Combustion (LTC) mode with significant potential for reducing NOx and particulate emissions while improving or maintaining thermal efficiency compared to Conventional Diesel Combustion (CDC) engines. The large reactivity difference between diesel and Natural Gas (NG) fuels provides a strong control variable for phasing and shaping combustion heat release. In this work, the Brake Thermal Efficiencies (BTE), emissions and combustion characteristics of a light duty 1.9L, four-cylinder diesel engine operating in single fuel diesel mode and in Diesel-NG RCCI mode are investigated and compared. The engine was operated at speeds of 1300 to 2500 RPM and loads of 1 to 7 bar BMEP. Operation was limited to 10 bar/deg Maximum Pressure Rise Rate (MPRR) and 6% Coefficient of Variation (COV) of IMEP. The engine performance was investigated using a combination of RCCI control variables including NG/diesel Blend Ratio (BR), diesel injection fuel split, and Start of Injection (SOI) timing for diesel injections. The RCCI map was generated using different injection strategies (single and double injections) and up to 20% EGR Exhaust Gas Recirculation (EGR) at higher loads to obtain the best brake thermal efficiency. In addition, the majority of the required energy (more than 80%) in RCCI operating points was provided from NG. The results showed a maximum of 5% increase in brake thermal efficiency and 92% reduction in NOx in RCCI combustion mode compared to the CDC mode.
机译：反应性受控压缩点火（RCCI）是有前途的双燃料低温燃烧（LTC）模式，其具有减少NOx和颗粒排放的显着潜力，同时与传统的柴油燃烧（CDC）发动机相比改善或保持热效率。柴油和天然气（NG）燃料之间的大反应性差异为分阶段和成型燃烧热释放提供了强控制变量。在这项工作中，研究了在单燃料柴油模式和柴油 - NG RCCI模式下操作的刹车热效率（BTE），排放和燃烧特性，轻型1.9L，四缸柴油发动机，并进行比较。该发动机以1300至2500rpm的速度操作，并且1至7巴BMEP的负载。操作仅限于IMEP的10巴/°最大压力升高率（MPRR）和6％的变异系数（COV）。使用包括Ng /柴油混合物比（Br），柴油喷射燃料分裂的RCCI控制变量的组合来研究发动机性能，以及柴油喷射的注射率开始（SOI）时序。使用不同的注射策略（单一和双注射）和高达20％EGR废气再循环（EGR）产生RCCI MAP，以获得最佳制动热效率。此外，RCCI运行点中所需的能量（超过80％）的大部分都是从NG提供的。与CDC模式相比，该结果最多达到了制动热效率增加了5％，并且在RCCI燃烧模式中减少了92％。

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