• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Modeling, control, and implementation of enhanced premixed combustion in diesel engines.
【24h】

Modeling, control, and implementation of enhanced premixed combustion in diesel engines.

机译：柴油发动机中增强的预混燃烧的建模，控制和实现。

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

Three different combustion modes for simultaneous low-nitrogen oxides (NOx) and low-particulate-matter (PM) called enhanced-premixed combustion (EPC) are described in this thesis for diesel engines.;b) EGR enabled EPC with single injection: This combustion mode was implemented with a single-injection close to top-dead center and a heavy use of EGR. The use of closed-loop control on combustion phasing via a cylinder pressure based control was found to be an important enabler for stabilizing this type of combustion. This combustion mode was applied mainly at low-load engine operating conditions.;c) Combustion mode with a split heat-release characteristic: This combustion mode consisted of a part of the fuel delivery very early during the compression stroke and a part of the fuel delivery close to the top-dead-centre (TDC). The part of fuel injected close to TDC experienced conventional high-temperature combustion and oxidized the carbon-monoxide produced earlier in the cycle, thereby improving combustion efficiency. The split nature of the combustion limited the rate-of-pressure rise associated with the multi-pulse EPC combustion.;The implementation of EPC were associated with fuel-efficiency penalty either due to off-phasing of combustion event, UHC and carbon-monoxide or oil-dilution. Specific strategies have been presented to overcome each of these limitations.;a) Multi-pulse EPC: This combustion mode was implemented with multi-pulse fuel-injection events early during the compression stroke and a heavy use of EGR. This type of combustion was characterized by a short combustion duration which increased the rate-of-pressure rise and maximum pressures in comparison to the conventional diesel combustion mode. The combustion phasing for this mode was kinetics controlled and this combustion mode was largely applicable to mid-load engine operating conditions.;A production version of 2.0 Liter, 4-cylinder FORD common-rail diesel engine was modified for the EPC experiments to run in a single-cylinder mode using a prototype intake and exhaust manifold and using independent fuel-injection strategies.;Keywords: Enhanced premixed combustion, heavy-EGR, long-ignition delay combustion, adaptive fuel injection control, simultaneous low-NOx and low-soot.
机译：本文针对柴油发动机描述了同时存在的低氮氧化物（NOx）和低颗粒物（PM）的三种不同燃烧模式，称为增强预混燃烧（EPC）.; b）EGR的单喷射EPC：燃烧模式是通过单次喷射接近死点中心并大量使用EGR来实现的。发现通过基于气缸压力的控制在燃烧定相上使用闭环控制是稳定这种燃烧的重要促成因素。这种燃烧模式主要应用于低负载发动机工况。c）具有分流放热特性的燃烧模式：这种燃烧模式由压缩冲程初期的一部分燃油输送和一部分燃油组成。交付接近最高死亡中心（TDC）。靠近TDC喷射的部分燃料经历了常规的高温燃烧，并氧化了循环中较早产生的一氧化碳，从而提高了燃烧效率。燃烧的分裂性质限制了与多脉冲EPC燃烧相关的压力上升率;; EPC的实施与燃烧效率的降低，UHC和一氧化碳的移相都与燃油效率的降低有关或油稀释。已经提出了克服这些局限性的具体策略。a）多脉冲EPC：这种燃烧模式是在压缩冲程早期以及大量使用EGR的情况下通过多脉冲燃料喷射事件实现的。这种燃烧的特点是燃烧持续时间短，与传统的柴油燃烧模式相比，增加了压力上升率和最大压力。该模式的燃烧定相是动力学控制的，并且该燃烧模式在很大程度上适用于中负荷发动机工况。修改了2.0升4缸FORD福特共轨柴油机的生产版本，以便在EPC实验中运行关键词：增强的预混燃烧，重EGR，长点火延迟燃烧，自适应燃料喷射控制，同时低NOx和低烟尘的单缸模式，使用原型进气歧管和排气歧管并采用独立的燃料喷射策略。

著录项

  • 作者

    Kumar, Raj.;

  • 作者单位

    University of Windsor (Canada).;

  • 授予单位 University of Windsor (Canada).;
  • 学科 Engineering Automotive.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 232 p.
  • 总页数 232
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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