Document Type and Number:
Japanese Patent JPH0243019
Kind Code:
B2
Abstract:
A method for controlling the valve opening period of a control valve for controlling a quantity of supplementary air supplied to an internal combustion engine during idling in a feedback manner responsive to the difference between the actual engine speed value and a desired idling speed value. When the engine is decelerating with the throttle valve fully closed, it is determined which of a plurality of predetermined engine speed values higher than the desired idling speed value, the engine speed has dropped across, and a decrease rate of the engine speed is detected at one of the predetermined engine speed. A quantity of supplementary air is determined, which corresponds to the one detected predetermined engine speed value and the detected decrease rate, based upon which the control valve is opened. Preferably, the determined valve opening period is corrected depending upon a magnitude of load of an electrical device applied on the engine.
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Application Number:
JP26750884A
Publication Date:
September 26, 1990
Filing Date:
December 20, 1984
Export Citation:
International Classes:
F02D41/16; F02D29/06; F02D31/00; F02D41/00; F02D41/12
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