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Engine dynamics are governed by the crankshaft angle. The Ford V6 engine model is no exception to this rule. However, in a rapid prototyping environment, internal combustion engine control systems are difficult to model
and to simulate, especially within both fast and real-time simulation settings. This is so since the engine dynamics may change abruptly at times other than the simulation time instants, in the case of fixed-step simulations. This
phenomenon usually results in a loss of accuracy. If one uses variable-step simulations. A closed-loop engine control system separated onto two target processors and connected to a data acquisition and monitoring host processor
is shown on the diagram. Such a configuration is ideal for a subsequent HIL setup where the actual Electronic Control Unit (ECU) replaces its simulated counterpart. In the table, the execution time per simulation step shows that the real-time capability is assured for a step size superior than about 255 µsec.
Tags : rapid prototyping environment, target processors, simulation acceleration, internal combustion engine, crankshaft angle, simulation settings, electronic control unit, simulation step, engine simulation, time capability, simulation time, engine dynamics, variable step, time simulation, time instants
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