This optimization environment simulates the performance of a marine generator system for three different loads by minimizing the mean absolute percentage error (MAPE) between the in-cylinder pressure simulated data and the measured data along 40 degrees of the combustion process and by verifying the firing pressure and the engine brake power. Then, an optimization process is performed based on the fitness function that includes the objective of the study and the penalty functions to express constraints. Firstly, the engine model is built in Ricardo Wave software and some parts are calibrated using data collected from the manufacturer. Moreover, those are in reasonable agreement with the reference results while in-house developed package is possible to run simulations with changing speed for engine control purpose.Īn engine optimization model is developed to fit the calculated in-cylinder pressure diagram to the experimental data by finding the optimal values of the start angle of injection and the amount of injected fuel for different engine loads. Different numerical experiments have been carried out from which it can be concluded that all packages predict similar profiles of pressure and temperature in the engine cylinder. These packages are compared with an in-house developed package and with reference results available from the literature. In the present study, two of the commercial packages, Ricardo Wave and Lotus Engine Simulation, have been tested on the capabilities for engine control purposes. Such techniques include variable valve timing, variable ignition timing, variable air to fuel ratio, and variable compression ratio. ECU computes the new set of parameters to make fine adjustments to actuators providing better engine performance. Various sensors are installed into the engine, the combustion performance is recorded, and data is sent to engine control unit (ECU).
However, engine control involves different operating parameters.
These parameters are required for advanced research on fluid flow and heat transfer and development of geometries of engine components. Most commonly used commercial engine simulation packages generate detailed estimation of the combustion and gas flow parameters.
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