Criterion studies on low temperature combustion in high compression

目前，内燃机正在向清洁高效的方向发展，包括使用可再生燃料。降低火焰温度对于抑制氮氧化物（NOx）的形成至关重要，从而减少对废气后处理的依赖。然而，燃烧过程变得不太稳定，点火更加难以控制。这项工作旨在发现在高压气缸压缩下点火和NOx形成的温度标准，当使用稀薄的均匀气缸装药并通过废气再循环（EGR）稀释时，包括使用传统和可再生燃料。本研究主要是一个实证调查，虽然与建模分析和先进的控制。在工业和政府的支持下，在测试、诊断和控制方面建立了领先的平台，该研究旨在获得对燃料混合和点火的更好理解，以确定NOx形成的标准，电荷可燃性和可燃性，以及燃料输送和性能适用性。

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.