| US 7,467,626 B2 | ||
| Ignition device of ignition control system for an internal combustion engine | ||
| Yusuke Naruse, Tokyo (Japan); Koichi Okamura, Tokyo (Japan); and Futoshi Aida, Tokyo (Japan) | ||
| Assigned to Mitsubishi Electric Corporation, Tokyo (Japan) | ||
| Filed on May 10, 2007, as Appl. No. 11/798,065. | ||
| Claims priority of application No. 2006-332024 (JP), filed on Dec. 08, 2006. | ||
| Prior Publication US 2008/0135017 A1, Jun. 12, 2008 | ||
| Int. Cl. F02P 3/04 (2006.01) | ||
| U.S. Cl. 123—605 [123/630; 123/406.13; 123/406.14; 123/406.27] | 13 Claims |
| 1. An ignition device of an ignition control system for an internal combustion engine, comprising:
an ignition coil having a primary coil and a secondary coil;
a switching element for causing a primary current to be conducted through and shut off from the primary coil of the ignition
coil;
a waveform shaping circuit for shaping a waveform of an ignition signal transmitted from an outside through a signal line
to supply a conduction signal thus obtained to the switching element;
ion current detecting means connected to the secondary coil of the ignition coil, for detecting an ion current flowing through
the secondary coil; and
ion signal generating means for outputting an ion signal, which indicates the ion current detected for a predetermined period
after the conduction signal of the waveform shaping circuit has been turned off, to the outside through the signal line while
blocking transfer of the conduction signal from the waveform shaping circuit.
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