期刊名称：IAENG International Journal of Computer Science
印刷版ISSN：1819-656X
电子版ISSN：1819-9224
出版年度：2021
卷号：48
期号：1
语种：English
出版社：IAENG - International Association of Engineers
摘要：Large-bore engines with continuous gaseous fuel supply system generally suffer from low fuel efficiency and instability performance. In order to achieve a more economical and stable engine performance, a multi-point injection system with optimized injection time for natural gas engine was developed in this work. First of all, a fuel injection device with discoid outlet structure was developed. Pseudo linear system was established to achieve proper response speed and seating velocity. After that, a collaborative optimization platform was established using the genetic algorithm and the thermodynamic model, and then an optimal injection strategy was obtained. Finally, the fuel efficiency, stability and power of a high-power gaseous fuel engine were tested. Results showed that compared with the engine with continuous gas supply system, the fuel efficiency of the engine developed in this work was improved by 6.4% under the full load and by 5.7% under the rated speed of 1000r/min. The volatility of exhaust temperature in twelve cylinders was reduced by 37.47% under the rated working condition. The start-up time was reduced by 21.3% and the torque under full load condition was increased by 4.7%.
关键词：High-power gaseous fuel engine;multi-point injection system;optimization of injection time;engine efficiency;volatility of exhaust temperature
