High-energy igniting device for petrol motor

The utility model relates to a high-energy igniting device for a petrol engine, which is composed of an ignition coil, a magnetoelectric type sensor, a spark plug, and a control circuit. The utility model is characterized in that the magnetoelectric type sensor is composed of a signal rotor, a sensing coil, an iron core; the periphery of the signal rotor is provided with magnetic steel, and the quantity of the magnetic steel is identical to the quantity of engine cylinders; clearance fit can be formed between the magnetic steel and the iron core; a secondary electrode is added between a lateral electrode and a central electrode of the spark plug. In the utility model the ignition performance of inflammable mixture can be increased, the self-purification of the electrodes can be kept, the mixture can be fully combusted, the reliability and the stability can be greatly improved, the pollution of the exhaust of CO, CH, N< X >O, coal smoke, etc. can be decreased, and the fuel saving ratio can be greatly improved.