Presented in this paper is the design and implementation of a saturating idle speed controller for a Ford V-8 fuel injected engine subjected to a torque load disturbance. The performance specification for the controller design is |Δrpm| ≤ 140 rpm where the controlled input is the by-pass air valve (BPAV). The controller design is realized using a frequency domain approach developed in Herman and Franchek (1997). An experimental verification of the controller is presented. The performance objective is satisfied using saturation control during the engine speed transients.

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