| 摘要 |
PROBLEM TO BE SOLVED: To provide an ignition device for an internal combustion engine for reducing the circuit scale by reducing the number of part items with a simple structure and preventing the occurrence of erroneous operation. SOLUTION: The energy accumulated in a capacitor 12 at the time of ignition and the energy accumulated in an energy accumulation coil 11 are supplied to the primary coil 14, and after high voltage for ignition is applied to the secondary coil 15, transistors Q1 and Q11 are alternately connected/disconnected to be multiply discharged. At the time, the period for the transistors Q1 and Q11 to be alternately connected/disconnected by a drive circuit 22 is set to determine the multiple discharge period and a discharge section signal IGw with engine cylinder discrimination data is generated. Therefore, there is no need of mounting a flip-flop circuit for storing the cylinder discrimination data, so that the circuit structure of the ignition device is simplified and the circuit scale can be reduced by reducing the number of part items. Moreover, by disusing the flip-flop circuit, the occurrence of malfunction caused by noise, etc., can be prevented.
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