Ignition apparatus for internal combustion engine

摘要

In an ignition apparatus for an internal combustion engine, an ECU produces an ignition signal to an igniter/coil circuit with an igniter and ignition coil, which in turn sends back a monitor signal for ignition failure determination in the ECU. The ignition signal and the monitor signal are sent through a single signal line. The monitor signal is produced based on a primary current or a secondary current of the ignition coil.