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本文介绍采用主副喷油泵及双通道喷嘴分段调节实现预喷油的研究。调节副喷油与主喷油间隔角为８℃Ａ～１０℃Ａ时，实现了初始喷油率低，后期喷油率高的双峰喷油规律。由１Ｅ１５０Ｃ型柴油机性能试验表明，采用分段调节式喷油，油耗率降低４ｇ／（ｋＷ·ｈ），ＮＯＸ排放下降了４４％。
This article describes the use of main and secondary injection pump and dual-nozzle nozzle to adjust the pre-injection research. Adjusting the secondary injection and the main injection interval angle of 8 ℃ A ~ 10 ℃ A, to achieve the initial injection rate is low, the late injection rate bimodal fuel injection law. According to the performance test of 1E150C diesel engine, the fuel consumption of 4g / (kW · h) is reduced by 44% with the segmented regulated fuel injection.