As one of the most common engine types in nowadays, the thermal efficiency of spark-Ignition (SI) engine is limited due to the lower compression ratio. Various technical solutions have been proposed to suppress knock and improve compression ratio of SI engines. In this paper, an new technical solution based on electromagnetic valve train (EMVT) was proposed to suppress knock of spark ignition engines, so that high compression ratio (HCR) engine (13:5) was obtained. Moreover, experimental and numerical analyses were carried out to optimize the proposed EMVT strategy. The result showed that the proposed EMVT strategies could well suppress the engine knock by reducing end-gas temperature and pressure and improving the spark-flame rate, resulting in significantly enhanced power, economic, and emission characteristics of SI engines. This study provides theoretical basis and technical approach for the development of internal combustion engines with high efficiency and high compression ratio.

作为当今最常见的发动机类型之一，火花点火（SI）发动机的热效率由于较低的压缩比而受到限制。已经提出了各种技术方案来抑制爆震并提高SI发动机的压缩比。本文提出了一种基于电磁阀系（EMVT）的新技术方案来抑制火花点火发动机的爆震，从而获得了高压缩比（HCR）发动机（13：5）。此外，进行了实验和数值分析，以优化提出的EMVT策略。结果表明，提出的EMVT策略可以通过降低最终气体温度和压力并改善火花燃烧率来很好地抑制发动机爆震，从而显着提高SI发动机的功率，经济性和排放特性。