高压共轨喷油器各孔喷油均匀性的测试与分析
Internal Combustion Engine & PowerPlant(2019)
Abstract
设计高压共轨喷油器的测量装置,测量喷油嘴各个喷孔的喷油量,分析各喷孔喷油量的均匀性,通过测试2只高压共轨喷油器喷油嘴的各孔喷油量,对测量装置进行考核和验证;计算和分析高压共轨喷油器喷油嘴各孔喷油量均匀性对碳烟(soot)排放、指示功等的影响.结果 表明:测量装置的喷油总量和重复性均满足试验要求,2只喷油器喷油嘴下排喷孔的喷油量均大于上排喷孔,转速、喷射压力以及喷射脉宽对喷油嘴各孔喷油质量均匀性均有一定影响;喷油嘴各孔喷油量不均匀会导致发动机soot排放恶化,增加局部soot浓度.
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