| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine igniter enabling the generation of a continuous spark discharge by input of energy, capable of reliably preventing accidental fire due to blowout.SOLUTION: An igniter comprises a blowout determination unit determining that blowout occurs if a secondary current is lower than a predetermined threshold Ia within a determination period, the determination period being a predetermined period &Dgr;T since the start of spark discharge by a main ignition circuit. If it is determined that blowout occurs during main ignition (during full transistor ignition), a control is exerted to generate continuous spark discharge after main ignition in the next cycle. Furthermore, a secondary current command value I2a at that time is set to a current value obtained by adding a predetermined current value α to the predetermined threshold Ia for use in the blowout determination. As a result, it is possible to ensure the prevention of the blowout in the next cycle, so that it is possible to reliably prevent the blowout from causing accidental fire. |
