Internal combustion engine ignition device

摘要

There is provided an internal combustion engine ignition device which comprises a switching element for causing or interrupting flow of a current through a primary coil of an ignition coil; a secondary current detection circuit connected to a secondary coil for detecting a secondary current flowing at the time of ignition; an ion current detection circuit for detecting an ion current generated after the ignition; and an energy consumption circuit which is activated based on an output signal from the secondary current detection circuit that is output when the secondary current exceeds a predetermined threshold value, to constitute a circuit for discharging energy stored in the ignition coil.

主权项

1. An internal combustion engine ignition device which comprises an ignition coil having a primary coil whose one end is connected to a power source terminal and a secondary coil whose one end is connected to an ignition plug; and a switching element which is serially connected to the other end of the primary coil and is ON/OFF controlled based on an ignition signal output from an ECU (Engine Control Unit) so as to cause or interrupt flow of a primary current through the primary coil of the ignition coil, said internal combustion engine ignition device comprising:
a secondary current detection circuit which is connected to the other end of the secondary coil, and, at the time of ignition when the switching element is made OFF, detects a secondary current flowing through the secondary coil to thereby output an output signal Vi2 during the secondary current exceeding a predetermined current threshold value Ith; an energy consumption circuit which is activated based on the output signal Vi2 from the secondary current detection circuit, to constitute a circuit for discharging energy stored in the ignition coil; and an ion current detection circuit which detects and outputs an ion current generated after the ignition.