二沖程活塞發(fā)動(dòng)機(jī)點(diǎn)火系統(tǒng)的設(shè)計(jì)與仿真
霍曉康
（中國人民解放軍陸軍裝甲兵學(xué)院，北京 100144）
摘 要：針對傳統(tǒng)點(diǎn)火系統(tǒng)進(jìn)行優(yōu)化設(shè)計(jì)，提出一種高能高速活塞發(fā)動(dòng)機(jī)用點(diǎn)火系統(tǒng)，尤其適用于二沖程高速汽油活塞機(jī)。該設(shè)計(jì)利用變頻反激變換升壓電路提升點(diǎn)火線圈充電電壓，并在點(diǎn)火線圈中反向嵌入永磁體增加點(diǎn)火能量，最后將提高點(diǎn)火線圈功率開關(guān)的鉗位電壓提高至800 V，提升了火花塞的擊穿等級，理論計(jì)算和仿真結(jié)果表明，所提出的設(shè)計(jì)思路可以有效提升點(diǎn)火系統(tǒng)的點(diǎn)火能量和點(diǎn)火頻率。
關(guān)鍵詞：變頻反激變換；點(diǎn)火系統(tǒng)；磁通反向偏置；高頻點(diǎn)火；Simulink 仿真
中圖分類號：V233.3 文獻(xiàn)標(biāo)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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