ニ茂铁改善HCCI发动机高负荷爆震的试验研究

在一台改造过的四缸柴油机上进行均质预混和压燃(HCCI)试验，研究了二茂铁对HCCI发动机高负荷爆震的影响。研究结果表明：二茂铁能够抑制HCCI发动机爆震，扩大发动机负荷范围；0.000 25二茂铁改善爆震、拓宽负荷范围作用较小，随二茂铁质量分数增加到0.000 35和0.000 5，抗爆性能和负荷拓宽能力明显增强，但二茂铁质量分数过高会导致发动机失火可能性增加。0.000 35是发动机转速为1 400 r／min下二茂铁质量分数的最佳参数。

Experimental Study on the Knock Control of HCCI Engine by Ferrocene at High Loads

The effect of ferrocene additive on high load knock of homogeneous charge compression igni?tion (HCCI) engine was investigated by an experiment carried out with the fourth cylinder of a four- cylinder diesel engine. The experimental results indicate that ferrocene can restrain the HCCI engine knock and extend the HCCI operational load range; at the ferrocene mass fraction of 0.000 25, the knock is abated and the load range is enlarged a little; when the ferrocene mass fraction increases to 0.000 3d and 0.000 5, the knock and the load range are improved a lot, but higher ferrocene fraction resulted in more likely engine misfire; the optimal mass fraction of ferrocene is 0.000 35 at I 400 r/min.