Application of statistical formulas to hydrodynamic torque converter modelling

In this paper a numerical estimation of hydrodynamic torque converter model is discussed. During the estimation it was assumed that the flow through in working area contains multiple flow streams. A contribution of each individual flow stream in transferring torque was assumed based on a pre-selected torque function. Model estimation relied upon proper equation and function parameter selection that provided minimization of the modelling error. Statistical factors were selected for accuracy evaluation of the modelled torque function. In this case torque functions were converted to diverging series, where values of fundamental statistical factors were calculated. Based on tests and numerical calculations for a pre-selected hydrodynamic torque converter it was concluded that there is a relation between modelling accuracy and values of some of the statistical factors. Application of statistical factors drastically simplified numerical calculations during modelling estimation.