Diesel Engine Preheating and Starting Simulation with Modelica Language

The article presents the results of mathematical model and software development for the simulation of diesel engine preheating and starting with the Modelica language. The model is based on the energy and mass balance method, Godunov scheme, Wiebe, and Razleytsev equations, and is a library of Modelica classes which describe the processes in engine systems and mechanisms including air and electrical starters, preheaters, and start facilities tools. The mathematical model includes the description of different boundary conditions, acausal connections, and basic and complex elements, such as a(n) electric and fuel coolant preheater, air heater in gas pipes, and compressed air starting system. The created mathematical model and software provides high speed calculation, reliability and accuracy of results, that is confirmed by comparison with experimental data. The possibility of conjugate calculation of stationary and transient multi-domain processes in various engine systems and mechanisms is ensured.