Математическая модель гидравлического сопротивления фильтра твёрдых частиц дизеля. Часть 4: временной коэффициент

Abstract

The article deals with a mathematical model, which describes the hydraulic resistance of a DPF under the real operating conditions. The model is based on the flow characteristics of a single module of the filter element of DPF, obtained experimentally at a constant temperature of fluid, and the data of bench tests of an 2Ch10.5/12 autotractor diesel, equipped with a full-sized DPF. The model allows to take into account a number of factors that characterize the operating conditions of a DPF in the exhaust system of this diesel. The factors are taken into account by introducing corresponding coefficients. The dependence of these coefficients on the operating and design parameters of the 2Ch10.5/12 diesel is experimentally obtained and described by the method of linear regression. In this part of the research we describe the physical meaning and evaluate the time coefficient of this mathematical model, which allows to take into account the dependence of the HR of DPF on the time of operation of the diesel in the stationary mode, that is the DPF clogging dynamics.