The high volumetric efficiency of pump and therefore has been maintained.

泵的高容积效率也因此得到了维护.

All along, there are fewer researches on the suction volumetric efficiency of heavy caliber piston pump and they are behind the needs of production development.

一直以来，对大口径活塞泵吸入容积效率的研究较少，滞后于生产发展的需要。

Pump valve spring fracture is another common typical fault of emulsion pump with high pressure and large discharge which reduces the volumetric efficiency of emulsion pump greatly.

泵阀弹簧断裂是高压大流量乳化液泵的另一种常见典型故障，极大地影响了乳化液泵的容积效率。

The results show that non-parametric models of the volumetric efficiency are more accurate than the parametric model for prediction and more suitable for system simulation as a sub-model.

检验结果表明，充量系数的非参数模型比多项式模型具有更高的预测精度，适合作为系统仿真的子模型。