二冲程活塞发动机点火系统的设计与仿真
霍晓康
（中国人民解放军陆军装甲兵学院，北京 100144）
摘 要：针对传统点火系统进行优化设计，提出一种高能高速活塞发动机用点火系统，尤其适用于二冲程高速汽油活塞机。该设计利用变频反激变换升压电路提升点火线圈充电电压，并在点火线圈中反向嵌入永磁体增加点火能量，最后将提高点火线圈功率开关的钳位电压提高至800 V，提升了火花塞的击穿等级，理论计算和仿真结果表明，所提出的设计思路可以有效提升点火系统的点火能量和点火频率。
关键词：变频反激变换；点火系统；磁通反向偏置；高频点火；Simulink 仿真
中图分类号：V233.3 文献标识码：A 文章编号：1007-3175(2018)05-0018-05
Design and Simulation of a Spark Ignition System for Two Stroke Piston Engine
HUO Xiao-kang
（PLA Engineering Institute, Beijing 100144, China）
Abstract: Aiming at the optimization design of a traditional ignition system, this paper proposed a kind of high energy spark ignition system for high speed piston engine, especially suitable for direct-injected gasoline two stroke engines. The boosted variable-frequency flyback converter was used to promote the ignition coil charging voltage and a piece of permanent magnet was embedded into the ignition coil to increase the ignition energy. With the clamp voltage across IGBTs promoted to 800 V, the spark plug break-down voltage was improved. Theoretical calculation and simulation results show that the proposed design thought can promote the ignition energy and frequency of the
ignition system.
Key words: variable-frequency fly-back converting; ignition system; flux back bias; high-frequency ignition; Simulink simulation
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