【摘要】 采用先进的EFS瞬时喷油量测量仪,分别对电控单体泵高、中、低转速工况进行循环喷油量的精确测量。通过对循环喷油量及喷油压力的试验数据分析,揭示了电控单体泵喷油量随转速改变的不一致性变化规律和主要影响因素。同时根据电控单体泵不同工况下的喷油特性,提出相应的喷油脉宽修正系数。验证试验结果表明,对喷油脉宽进行修正后,各工况喷油量不一致性均得到明显改善,某些工况改善程度在50%以上,从而在一定程度上改善了柴油机工作稳定性。更多还原

【Abstract】 The cycle fuel injection quantity of electronic unit pump(EUP) is accurately measured by using EFS Instantaneous Mono-Injector Qualifier in the operation conditions of high,middle and low speeds.The test data of fuel injection quantity and injection pressure are analyzed to reveal the variation law of fuel injection quantity inconsistency and its main influencing factors.In addition,according to the fuel injection characteristics of EUP,corresponding injection pulse width correction coefficients are proposed.The results of verification test show that after the injection pulse widths are corrected,the inconsistency of fuel injection quantity greatly improves,with an over 50% improvement in some conditions,thus enhancing the operation stability of diesel engine to certain extent.更多还原