A GENeric Internal Combustion Engine model : LiU-Genie

Abstract: As the demand for control in modern vehicles grows, models are needed to develop a better understanding of processes and engine behavior. The thesis contributes with a generic extended MVEM with SI and CI as well as VVA compatibility and modeling structure using MATLAB/Simulink environment.  The model contains the engine components air filter, compressor with bypass valve, intercooler, throttle, intake manifold, cylinder, exhaust manifold, EGR, turbine with a wastegate, and exhaust system, keeping track of pressures, mass flows, temperatures, and oxygen concentrations.  This thesis presents models, parametrization, and signals that needed to be measured to make it possible to parametrize other engines with the same method. A 6-cylinder 12.7 liter Scania diesel engine and a 4-cylinder 2 liter Volvo petrol engine are used to validate the model. The model shows agreement with measured data for pressure, mass flow, temperature, and oxygen concentration on several operational points. That shows the model can handle most engines with just small adjustments. The component-based model structure also enables the possibility to change and adjust the models used by, for example using the extended ellipse model for compressor efficiency or implement a double Vibe function for combustion calculations.