Patent Number: 7,823,561

Title: Method and apparatus for controlling ignition timing of an internal combustion engine based on engine rotary speed

Abstract: An engine ignition control apparatus includes a standard ignition map for use in retarding ignition timing when a throttle opening is within a predetermined range, and when an engine speed is within a predetermined region; and an acceleration-time advance angle correction quantity map for performing advance angle correction when the engine speed is within the predetermined region; an engine accelerometer for detecting a rate of change of the engine rotary speed; and an acceleration-time advance angle correction quantity setting unit for correcting an advance angle of the ignition timing. When the engine speed is within the predetermined range, and the rate of change of engine rotary speed is greater than or equal a predetermined rate, the acceleration-time advance angle correction quantity setting unit performs attenuation processing for deriving an advance angle correction quantity; and increases an attenuation quantity of the advance angle quantity for every ignition.

Inventors: Omuro; Yoshiya (Saitama, JP), Machida; Kenichi (Saitama, JP)

Assignee: Honda Motor Co., Ltd.

International Classification: F02P 5/15 (20060101)

Expiration Date: 2019-11-02 0:00:00