Criterion studies on low temperature combustion in high compression

目前，内燃机正在向清洁和高效运行转变，包括使用可再生燃料。降低火焰温度是抑制氮氧化物(NOx)形成的关键，氮氧化物(NOx)的形成减少了对废气后处理的依赖。然而，燃烧过程变得不稳定，着火更难控制。这项工作旨在发现点火和NOx生成的温度标准，当使用均质气缸充气时，使用稀薄的废气再循环(EGR)，包括使用传统燃料和可再生燃料。这项研究主要是一项实证调查，尽管有建模分析和高级控制。这项研究建立在测试、诊断和控制方面的前沿平台，部分是由以前的工业和政府支持建立的，旨在提高对燃料混合和点火的了解，确定NOx形成的标准、装药的可燃性和可燃性，以及燃料的输送和性能适宜性。由于这项研究与最先进的工业创新具有很高的相关性，因此这项研究的结果对汽车行业和整个清洁内燃机研究领域的研究界都是至关重要的。燃料影响方面为未来的生物燃料生产指明了方向。这种探索性的研究最终将与降低成本、提高操作稳定性和耐用性等工程努力相协调。本研究的高科技性质适用于HPQ培训。这项研究的结果有助于更有效地运行发动机，更可持续地使用能源，并在加拿大和世界上更有效地保护环境。

Presently, internal combustion engines are transforming towards clean and efficient operations, including using renewable fuels. The lowering of the flame temperature is crucial to suppress the nitrogen oxides (NOx) formation that reduces the reliance on the exhaust gas after-treatment. However, the combustion process becomes less stable, and the ignition more difficult to control. This work intends to discovery the temperature criteria of the ignition and the NOx formation under elevated cylinder compression, when using a homogeneous cylinder charge that is lean and diluted with an exhaust gas recirculation (EGR), including using conventional and renewable fuels. This research is primarily an empirical investigation, although with the modeling analyses and advanced controls. With the leading-edge platforms in testing, diagnosis and control that are established, in part, by the previous industrial and governmental support, the research seeks to obtain improved understandings on the fuel mixing and ignition, to identify the criteria of NOx formation, the charge ignitability and flammability, and the fuel delivery and property suitability.Due to the high relevance of this research to state-of-the-art industrial innovations, the results of this investigation are fundamental to the automotive industry and the research communities in clean combustion engine research at large. The aspects on fuel impact give directions to future biofuel productions. This explorative oriented research will eventually reconcile with the engineering endeavors such as the cost reduction, and the operational robustness and durability improvements. The high-technology nature of this research is suitable for the HPQ training. The outcome of this research helps to operate engines more efficiently, to use energy more sustainably, and to protect the environment more effectively in Canada and in the world.