Research of influence of the polarity of the high voltage breakdown voltages of the spark plug electrode gap

Abstract

Research of influence of the polarity of the high voltage breakdown voltages of the spark plug electrode gap

Frantsev S.M., Kavtorev A.Y.

Incoming article date: 18.05.2015

The laboratory studies the dependence of breakdown voltage of the spark plug gap on the polarity of the high voltage generated ignition system, air density and the size of the spark plug gap. The studies were performed using the tester spark under pressure. With a resistive voltage sensor made visualization, transformation and analysis of information on the magnitude of the breakdown voltage. Produced processing waveforms shown that flashover occurs regardless of the magnitude of the gap and is determined by the rate of rise of the secondary voltage of the external shape of the electrode and insulator spark plug. To reduce the breakdown voltage should be selected polarity when the cathode is the breakdown of the central electrode of the spark plug. Reversal may allow push surface breakdown in the zone of higher pressure in the chamber of the device, albeit with an increase in the breakdown voltage of the spark gap.

Keywords: ignition system, spark, spark ignition, ignition coil, motor, electrical equipment, ignition sparkplugs, breakdown voltage