Engine ignition control apparatus

Abstract

The invention aims to prevent an increase in an engine speed of an engine having an IACV when the IACV is fully opened for initialization of the IACV immediately after start up of the engine. When cranking starts by turning on a starter switch 14, the ignition timing is first corrected to a fixed value on a retard side. When an IACV 6 reaches a fully opened position, the ignition timing is corrected to the retard side once, and thereafter corrected to an advance side. The correction to the advance side is performed in accordance with a difference between the number of idling target steps and the current number of steps, and the amount of advance correction is reduced as the difference is reduced. Upon completion of the initialization of the IACV 6, the ignition timing correction amount isthen restored to the initial value by increasing the amount of advance by a predetermined amount in a stepwise manner.

Description

Technical field [0001] The present invention relates to an engine ignition control device, in particular to an engine ignition control device suitable for improving the startability of an engine having an idle air volume control valve (hereinafter referred to as "IACV"). Background technique [0002] It is well known that such an engine control device works as follows: IACV is installed on the branch circuit bypassing the throttle valve, and the opening of the IACV is controlled when the throttle valve is completely closed, thereby adjusting the engine to rotate at idle speed. The amount of air inhaled at a time. In terms of controlling the opening degree of the IACV, the fully open position of the IACV is learned when the engine is started, and the amount of air flowing through the IACV is calculated based on the fully open position. [0003] Therefore, when the engine is started during the control process of the learning of the IACV fully open position (during the fully open ini...

AI Technical Summary

Problems solved by technology

[0006] In the conventional IACV control device, since the feedback control of the engine speed is performed, in the case of an actual vehicle, for example, it is necessary to set the ignition for retarding the ignition by trial and error while confirming the engine rotation state. advance angle, which requires more set-up time

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