Patent ID: 7007668
Filing Date: 2006-03-07
Classification: F02P

Abstract:
1. An ignition control system for an internal combustion engine comprising: throttle opening detection means for detecting a throttle opening of a throttle valve disposed in an intake passage of the internal combustion engine; crank angle detection means for detecting a crank angle signal associated with the rotation of a crankshaft of the internal combustion engine; stroke determination means for determining a stroke based on the crank angle signal detected by the crank angle detection means; and ignition timing correction means for correcting ignition timing in a retardation direction by a predetermined retardation angle when the throttle valve is rapidly opened to a predetermined throttle opening and then rapidly closed within a predetermined time period including one combustion cycle of the internal combustion engine, the combustion cycle being defined by the stroke determination means, and the predetermined retardation angle being based on at least the throttle opening.