Modelling Fuel System Injector Hydro-Mechanical Processes

Abstract

This study analysed the characteristics of the fuel system of a self-ignition engine with electronic control, taking into account the characteristics of the processes in the injector and the injection control system. The results of simulations of hydro-mechanical processes in an injector with an electromagnetic controller are presented. The proposed model takes into account the propagation processes of the pressure impulse in the fuel and in the parts of the injector subjected to deformation during injection. To describe the elastically-deformable state of the injector parts, an equivalent model of the injector valve stem was used. The results of calculations are proposed for a common simulation of hydrodynamic and electro-dynamic processes occurring during fuel injection into the Common Rail (CR) system.