在汽油压燃低温燃烧模式中，为满足工况拓展需求，不同负荷下发动机适用的燃料混合气的活性不同。本项目将燃料活性可控的低温重整技术应用到汽油压燃燃烧模式中，结合试验和仿真手段，系统研究不同负荷下燃料低温重整产物对汽油压燃燃烧模式燃烧过程的影响及作用机理。具体包括：首先，基于流动管重整器试验平台，分别研究温度、压力、当量比和滞留时间对实际汽油燃料低温重整产物特性的影响规律；其次，基于发动机试验台架，研究不同燃烧控制参数，不同组分的低温重整产物对发动机着火和放热过程的影响规律以及大/小负荷极限拓展探索；最后，利用数值仿真手段，研究低温重整产物对燃烧反应路径，缸内混合气火焰结构及着火区域的空间分布特征的影响。本项目对深入理解燃料低温重整产物对汽油压燃燃烧模式的影响机理具有重要的理论意义，对于寻求内燃机全工况高效清洁燃烧新模式提供重要的指导价值。

To extend engine operating region, the suitable reactivity of fuel mixtures is various under different loads in the low temperature combustion mode of gasoline compression ignition (GCI). The project will apply the low temperature reforming technology with controllable fuel reactivity to GCI to investigate the effects and mechanism of low-temperature reforming products on GCI combustion process under different loads by means of experiments and numerical simulation. Firstly, based on the tube reformer experimental platform, the effects of temperature, pressure, equivalence ratio and residence time on the characteristics of gasoline low-temperature reforming products will be investigated. Secondly, based on the engine bench, the effects of various low-temperature reforming products on the engine ignition and heat release process, and the operating region exploration of high/low load will be studied under different combustion control parameters. Finally, by means of numerical simulation, the effects of low-temperature reforming products on the fuel combustion reaction pathway, the flame structure of in-cylinder mixtures and the ignition spatial distribution characteristics will be investigated. The study of this project has important theoretical significance for in-depth understanding the effects and mechanism of low-temperature reforming products on GCI mode, and very important guiding value on exploration a high-efficient and clean combustion mode in internal combustion engine under full operating region.