pilot injection

Depending on the engine design, revs and load, modern diesel engines use a pilot or double pilot injection, a main injection and a post injection.

依赖发动机设计，转速和负荷，现代柴油机使用一个导向或双导向喷射，一个主喷和一个后喷。

Experimental Study on the Influence of Pilot Injection on Diesel Engine Noise

预喷射技术对柴油机噪声影响的试验研究

This paper illustrates the stimulation mechanism, effecting factors, pilot injection program, pilot monitoring program, pilot test sampling analysis and test effect analysis.

就MEOR增油机理、影响因素、现场注入方案、现场监测方案、现场试验取样分析及试验效果分析，进行了较详细的论述。

The test results show that: adding pilot injection, engine sound quality improved obviously. In different working condition it can seek the best injection strategies of pilot injection to make the sound quality get the optimal parameters.

结果表明：加预喷射后，发动机的声音品质明显改善，不同工况存在着较好的预喷参数策略使声音品质取得较好。