Abstract
ABSTRACT A new generation, transient, multi-cylinder, turbocharged diesel engine simulation is developed for predictions of dynamic response and performance of engine powertrain systems, for assessment of alternative system configurations, and for integration studies in conjunction with the rest of the components of ground vehicles. The simulation is based on a comprehensive single-cylinder engine model with built-in physical submodels and transient capability to ensure high fidelity predictions. The single-cylinder model has been converted into a module within the flexible and reconfigurabie MATLAB-SIMULINK environment to readily accommodate design changes, submodel upgrades, and interfacing with other vehicle models. It is shown that transient, multi-cylinder simulation of an arbitrarily-selected number of cylinders that are configured to form the engine can be readily accomplished. Illustrative studies are conducted to demonstrate the capability of the simulation to perform system dynamic studies and predict instantaneous torque and structural loads as a function of both driver demand and external load. The usefulness of the tool for powertrain design and optimization studies, and as a component of entire vehicle simulations, is apparent.
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