Improving the technical and economic performance of diesel engines for shunting locomotives

An experimental verification of the effectiveness of applying a compromise fuel injection advance angle (FIAA) was conducted on a test stand for a PD1M type diesel generator unit. The study included an analysis of injection pressure changes at various FIAA values, as well as tests of the installation with the ESUVT.01 electronic fuel injection control system under load. Additionally, modeling of the diesel engine’s working process was performed using the “Diesel-RK” software package, followed by processing of the obtained data. Comparison of test results in locomotive characteristic modes at fuel injection advance angles of 14° and 29° crankshaft rotation showed that using a compromise FIAA value ensures a reduction in the locomotive’s average operational fuel consumption by 7-10 %, depending on operating conditions. Furthermore, decreasing the advance angle positively affects the reduction of maximum cylinder pressure and exhaust gas temperature, indicating an increase in the overall effectiveness of this approach.