Engine control system using combination of forward model and inverse model

摘要

An engine control system includes an inverse model which includes a forward model and a feedback loop, wherein an actuating parameter, such as the quantity of fuel injected from a fuel injector, outputted from the forward model is used as a controlled variable, such as the air- fuel ratio in an exhaust system, inputted into the inverse model through the feedback loop. The forward model has preferably a learning function using condition-indicating factors such as engine speed and throttle angle. Accuracy of the inverse model is improved and appropriate engine control can be realized even during a transient state of the engine.