Inventors:
Kenneth J. Buslepp - Shelby Township, Macomb County MI
Douglas E. Trombley - Grosse Pointe MI
Ronald J. Sikarskie - Warren MI
Assignee:
General Motors Corporation - Detroit MI
International Classification:
F02D 4116
Abstract:
An idle speed regulating system is described for an internal combustion engine operating according to a fuel based control strategy, wherein the amount of fuel delivered the engine is determined directly as a function of the demand for engine output power and the amount of air supplied to the engine is controlled as a function of the quantity of delivered fuel. The system senses the actual idling rotational speed of the engine, derives a desired idling speed for the engine, and reduces the difference between the desired and actual idling speeds by adjusting the flow rate of the quantity of fuel delivered to the engine as a function of the difference between the desired and actual idling speeds. More specifically, the rate of fuel flow is adjusted in accordance with the sum of an open-loop feedforward value, a closed-loop feedback value, and preferably an adaptive learning correction value.