内燃机转动惯量试验推算方法的研究

A Study on the Method for Deducing the Inertia Moment of an Engine

采用基于惯量加速原理的无负荷测功法 ,可在线快速检测内燃机动力性能 ,对于这种检测方法来说 ,转动惯量是一项重要和必要的参数。讨论了当前一些确定转动惯量的方法 ,并且提出了一种新方法——用瞬时转速推算转动惯量法 ,并介绍了该方法的原理。它是在低速稳定工况时 ,测出瞬时转速和气缸压力来推算得出转动惯量。在 185型柴油机上进行了试验 ,试验结果表明它的精度在 3%内。

WT5”BZ] The inertia moment is an important parameter,for example,it is necessary for the on line rapid estimating power performance of engine that is based on the principle of inertia acceleration under no load.In this paper,some current method for determining the inertia moment of moving parts of engine are discussed and a new method——transient rotational speed method to deduce inertia moment is proposed,its principle is also presented.It deduces inertia moment by means of measured transient rotational speed and cylinder pressure under steady conditon and lower speed.This method is experimented at a model 185 diesel,the experimental results indicate that its accuracy is within 3%.Based on calculating and experimental results,the factors that influence measuring accuracy of the method are discussed and some improvements are proposed. [WT5”HZ]