CRANK ANGLE SENSOR AND IGNITION TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PURPOSE:To surely start an engine even at a low temperature by discriminating signals for fixed advance timing at starting time, set in a plural quantity in cylinders, and selecting the signal from which the predetermined fixed advance timing is obtained in accordance with a cooling water temperature. CONSTITUTION:In the case of a starter switch turned ON, electrification is started synchronously with a predetermined riseup signal when a signal for showing a predetermined cylinder No is set, and the electrification is started by all the riseup signals when the signal for showing the predetermined cylinder NO is not set. When a fixed advance timing signal is not discriminated, electrification to all the coils of a fall down signal is cut off to perform ignition. On the other hand, when the fixed advance timing signal is discriminated, a cooling water temperature is watched to perform ignition by a predetermined fall down signal, when the temperature is in a predetermined value or more, and by a separately predetermined fall down signal when the temperature is less than predetermined value. In this way, starting can be surely performed even at a low temperature.