Patent ID: 6581584
Filing Date: 2003-06-24
Classification: F02P,Y02T

Abstract:
An ignition control method for an internal combustion engine comprising a signal generator device to generate a first pulse signal at a first rotation angle position set at a position advanced relative to a top dead center of said internal combustion engine and a second pulse signal at a second rotation angle position set at a position delayed relative to said first rotation angle position and a position detection circuit to output a position detection signal whenever a peculiar point of a waveform of an output from a generation coil of a magneto AC generator driven by said engine and a phase relation between an output of said signal generator device and an output of said generation coil so set as that said position detection signal is generated at least once between said first and second rotation angle positions whereby an ignition position of said engine is so controlled that when said engine should start or while a rotational speed of said engine is lower than a set value, said engine is ignited as one signal selected among said second pulse signal and said position detection signal is generated and while said rotational speed of said engine exceeds said set value, said engine is ignited at a rotation angle position arithmetically operated from control conditions including said rotational speed of said internal combustion engine.