In this work, a three-staged multi-injection based on the triple-swirler technique was proposed and investigated, which can broaden the engine envelope than a two-staged fuel supply scheme. The fuel can be split into three portions according to the combination of different injectors. Injection-1 means that only injector-1 supplies fuel, while Injection-1 + 2 means that injector-1 and injector-2 supply fuel simultaneously. The spark ignition performance, combustion efficiency, and exhaust emissions by using RP-3 kerosene are analyzed and compared with different fuel injection modes. The excellent ignition performance is achieved by using injection-1 with the ignition fuel-air ration is 0.008, whereas the other injection modes perform relatively poorly. The efficiency and exhaust emissions curves achieved by injection-1 + 2 and injection-1 + 3 intersect, where the overall equivalence ratio is about 0.25. When the overall equivalence ratio exceeds this critical value, the combustion efficiency of RP-3 kerosene achieved by using injection-1 + 3 can be up to 1% higher than injection-1 + 2. Furthermore, the optimal fuel supply scheme by the three-staged multi-injection technology is achieved: injection-1 is used for spark-ignition, injection-1 + 2 for low power conditions (overall equivalence ratio is less than 0.25), and injection-1 + 3 for high power conditions.

在这项工作中，提出并研究了基于三涡流技术的三阶段多喷射技术，与两阶段燃料供应方案相比，它可以扩大发动机的空间。可以根据不同喷射器的组合将燃料分为三部分。喷射1表示仅喷射器1供油，而喷射1 + 2表示喷射器1和喷射器2同时供油。分析了使用RP-3煤油的火花点火性能，燃烧效率和废气排放，并与不同的燃油喷射方式进行了比较。通过使用点火燃油-空气比为0.008的喷射1可获得出色的点火性能，而其他喷射方式的性能相对较差。通过喷射1 + 2和喷射1 + 3达到的效率和废气排放曲线相交，总当量比约为0.25。当总当量比超过此临界值时，通过使用喷射1 + 3实现的RP-3煤油的燃烧效率可以比喷射1 + 2高达1％。此外，三种燃料的最佳燃料供应方案分阶段的多重喷射技术：喷射1用于火花点火，喷射1 + 2用于低功率条件（总当量比小于0.25），喷射1 + 3用于高功率条件。