Patent ID: 7823561

Claim:
An engine ignition control apparatus comprising: an electronic control unit operatively connected to a plurality of sensors in an internal combustion engine of a vehicle, said plurality of sensors comprising a throttle position sensor and an engine speed sensor; a standard ignition map stored in a recordable data storage medium for retarding ignition timing when a detected throttle opening is in a control region in which the detected throttle opening is greater than or equal to a predetermined throttle opening, and when a detected engine rotary speed is within a predetermined rotary speed range; an acceleration-time advance angle correction quantity map stored in a recordable data storage medium for performing advance angle correction of an ignition timing in response to the engine rotary speed in the control region; an engine accelerometer for detecting a rate of change of the engine rotary speed during acceleration of the vehicle; and an acceleration-time advance angle correction quantity setting unit for setting the ignition timing at the time of correcting an advance angle; wherein, when the detected engine rotary speed is within said predetermined rotary speed range and a detected rate of change of engine rotary speed is greater than or equal to a predetermined rate of change of engine rotary speed, the acceleration-time advance angle correction quantity setting unit is operable: to perform an attenuation processing for deriving an advance angle quantity from the acceleration-time advance angle correction quantity map, and to increase an attenuation quantity of the advance angle quantity for every ignition so as to perform the advance angle correction based on the derived advance angle quantity during said attenuation processing.