• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Small Engine Technology Conference >A Study of HCCI Combustion Using Spectroscopic Measurements and Chemical Kinetic Simulations: Effects of Fuel Composition, Engine Speed and Cylinder Pressure on Low-temperature Oxidation Reactions and Autoignition
【24h】

A Study of HCCI Combustion Using Spectroscopic Measurements and Chemical Kinetic Simulations: Effects of Fuel Composition, Engine Speed and Cylinder Pressure on Low-temperature Oxidation Reactions and Autoignition

机译：使用光谱测量和化学动力学模拟的HCCI燃烧研究：燃料组合物，发动机速度和气缸压力对低温氧化反应和自燃的影响

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

摘要

The Homogenous Charge Compression Ignition (HCCI) engine is positioned as a next-generation internal combustion engine and has been the focus of extensive research in recent years to develop a practical system. One reason is that this new combustion system achieves lower fuel consumption and simultaneous reductions of nitrogen oxide (NO_x) and particulate matter (PM) emissions, which are major issues of internal combustion engines today. However, the characteristics of HCCI combustion can prevent suitable engine operation owing to the rapid combustion process that occurs accompanied by a steep pressure rise when the amount of fuel injected is increased to obtain higher power output. A major issue of HCCI is to control this rapid combustion so that the quantity of fuel injected can be increased for greater power. Controlling the ignition timing is also an issue because it is substantially influenced by the chemical reactions of the fuel. Various approaches are being researched for expanding the range of stable engine operation, including the application of turbocharging, the use of residual combustion gas, stratification of the fuel concentration, and the use of a blend of two types of fuel having widely different ignition characteristics. Experiments and chemical kinetic simulations were conducted using a blended fuel of n-heptane (0 RON), which autoignites easily, and iso-octane (100 RON) that is not conducive to autoignition. The results revealed the possibility of increasing the fuel injection quantity while controlling the ignition timing. It was also found that varying the engine speed influenced the cool flame activity level, with the result that the ignition timing differed. These results provide insights for controlling the autoignition process leading to HCCI combustion.
机译：均质充量压燃（HCCI）发动机被定位为下一代内燃机和已被广泛研究的重点，近年来开发出实用的系统。一个原因是，这种新的燃烧系统实现了更低的油耗和氮氧化物（NO_x的）和颗粒物（PM）的排放量的同时降低碳​​，这是今天的内燃机的主要问题。然而，HCCI燃烧的特性，可以防止由于发生伴随有陡峭的压力上升时燃料注入量的增加，以获得更高的功率输出的快速燃烧过程合适的发动机操作。 HCCI的一个主要问题是控制这种快速燃烧，使燃料的量能注入更大的动力增加。控制点火定时也是一个问题，因为它基本上是由燃料的化学反应的影响。各种方法正在研究扩大稳定的发动机运转的范围内，包括涡轮增压的申请中，使用残留的燃烧气体的，燃料浓度的分层，而且使用两种燃料具有广泛不同点火特性的共混物组成。实验和化学动力学模拟，使用正庚烷（0 RON），其自动点火容易，和异辛烷（100 RON），其不利于自动点火的混合燃料进行。结果表明增加燃料喷射量，同时控制所述点火正时的可能性。有人还发现，改变发动机转速影响了冷焰的活动水平，其结果是，点火正时不同。这些结果提供了用于控制自动点火过程中导致HCCI燃烧的见解。

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