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直接点火有利于改善汽油发动机的排放、提高点火系统的可靠性。本文提出了直接点火系统次级电压与点火能量的设计计算模型，设计了LJ276Q发动机直接点大系统，研制了样品，并进行了排放对比试验，研究的结果可为今后直接点火及电喷点火系统设计提供有效的手段。
Direct ignition helps to improve the gasoline engine emissions and improve the reliability of the ignition system. In this paper, the design and calculation model of the secondary voltage and ignition energy of the direct ignition system are proposed. The LJ276Q direct engine large-scale engine system is designed, the samples are developed and the discharge comparison test is carried out. The results of the study can be used for the future direct ignition and electro-ignition ignition system Design provides an effective means.