| 摘要 |
An ignition system for an internal combustion engine includes an ignition coil, electric power supply circuit, a switching transistor, engine condition detecting element or unit that detects a signal relating to flow speed of air-fuel-mixture gas in the engine, and ignition control unit that controls the switching transistor to provide multiple ignition sparks in a predetermined ignition period. The ignition control unit controls the switching transistor to maintain each of the ignition sparks according to the signal relating to the flow speed of air-fuel-mixture gas in the engine to maintain sufficient spark energy for igniting the air-fuel mixture gas.
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