Engine Idle Dynamics and Control: A 5.8L Application 820778

An experimentally obtained low order sampled data description of the response of engine speed to throttle opening and spark advance is used to describe the idle speed dynamics of a 5.8L engine with an automatic transmission. Based upon the sampled data model, a multi-input idle speed controller is designed that returns the idle speed to its set point within five engine revolutions after the application of a load. The “cost” of control is examined and experimental data is shown for application of a sudden power steering load utilizing control of spark advance and a slow throttle actuator.


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