Why do some motorcycle spark plugs spark brightly and have a long arc?

 Anyone who likes to play motorcycles knows that the strength of the spark of the spark plug directly determines whether the motorcycle is easy to start and whether it runs vigorously. But thick and bright, there is a motorcycle igniter that can pull out a long electric spark and present a thick bright blue spark, which is the pursuit of many riders.

For example, igniters, high-voltage packs, spark plugs, etc., even some riders know a lot about them, and they also know about capacitive ignition systems and inductive ignition systems.
The strength of the spark, its essence is the strength of the ignition energy, the energy is strong, that is, the spark with high voltage and high current will naturally appear thick and bright, then, how to do this, let's discuss the two Mainstream igniter to explain.
At present, motorcycle igniters are mainly divided into CDI igniters and PEI igniters. Correspondingly, high-voltage packages are also divided into capacitor high-voltage packages and inductive high-voltage packages. CDI igniters can only match capacitor high-voltage packages, and PEI igniters can only match Inductive high-voltage package, the reverse configuration will not only affect the effect, but sometimes there is no spark. For example, if the capacitor igniter is equipped with an inductive high-voltage package, there will be sparks, but an inductive igniter equipped with a capacitor high-voltage package will not spark.
Let's talk about the capacitor high-voltage package first, which is mostly used for DC electronic electric firearms, and AC igniters charged by low-voltage magneto ignition coils.
The working principle of the DC electronic igniter is: through the DC-DC boost method, the DC6v-12v voltage is boosted to more than 200, which is used as the capacitor charging voltage of the igniter, while the low-voltage AC igniter is the ignition charging coil of the magneto The AC voltage of about 200V is used as the charging voltage of the igniter capacitor. Therefore, the energy of the capacitor igniter is stored in the igniter in the form of an electric field.
Since it needs to be charged, it takes time. Generally, the charging voltage of the igniter capacitor can reach about 180-200V, and the charging time needs 7-10ms to be fully charged. Therefore, the capacitor igniter can be fully charged at low speed, and the spark is relatively strong. .
As the speed increases, the ignition cycle will be shortened accordingly. When the time is shortened to less than the charging time at 500 rpm, the corresponding cycle is 7ms, and at 6000 rpm, the corresponding cycle is 10ms. At this time, the capacitor is not fully charged, that is to say , When the capacitor is not fully charged, the next ignition time will come, and the capacitor must be discharged and ignited, so that the ignition voltage will become smaller and lower at high speed, and it will be reflected to the outside that the spark is getting thinner and thinner. When it exceeds 10,000 rpm, the corresponding period is 5ms, and the more dissatisfied capacitors cannot discharge electricity, and the phenomenon of fire may occur.
The AC igniter is the ignition electric energy provided by the magneto. It also has the same problem, that is, the capacitor cannot be fully charged at high speed. In the past, the voltage doubled AC ignition was used. The principle is to put the other half of the coil. In terms of energy utilization, the performance of such an igniter is a little higher than that of an ordinary AC igniter, but it also faces the problem of high-speed burnout.