Physical modeling of a heavy-duty engine for test-cycle simulations in Modelica

Peter Jonsson


Development of engines with less fuel consumption and with new types of fuel is required as emissions and the limited access of petroleum are issues coupled to diesel engines. Experimental testing is in many cases insufficient and much more expensive in comparison with simulations for engine development. The focus in this thesis has been on extending a model of a Diesel Compression-Ignition engine for simulations and development of a new model for the cylinders. The model was developed with Dymola running code written in the language Modelica and with the external Engine Dynamics Library developed by Modelon AB. The need for the model extension has primary been for it to be able to handle a larger operating range for variables.