二沖程活塞發動機點火系統的設計與仿真
霍曉康
（中國人民解放軍陸軍裝甲兵學院，北京 100144）
摘 要：針對傳統點火系統進行優化設計，提出一種高能高速活塞發動機用點火系統，尤其適用于二沖程高速汽油活塞機。該設計利用變頻反激變換升壓電路提升點火線圈充電電壓，并在點火線圈中反向嵌入永磁體增加點火能量，最后將提高點火線圈功率開關的鉗位電壓提高至800 V，提升了火花塞的擊穿等級，理論計算和仿真結果表明，所提出的設計思路可以有效提升點火系統的點火能量和點火頻率。
關鍵詞：變頻反激變換；點火系統；磁通反向偏置；高頻點火；Simulink 仿真
中圖分類號：V233.3 文獻標識碼：A 文章編號：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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