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柴油机自由加速烟度排放不符合标准时，可采用调整供油提前角、限制最大供油量、调整喷油器等方法，使其排放达标。
Diesel free-acceleration smoke emissions do not meet the standards, can be used to adjust the fuel supply advance angle, limit the maximum fuel supply, fuel injectors and other methods to adjust its emissions.