Plasma ignition device.

摘要

An apparatus (30) and method for generating a highly conductive channel for the flow of plasma current between the electrodes (48) of an ignitor gap (46) device are disclosed. A high voltage transformer (T1) having a high turns ratio is used to produce a high voltage spark across an ignitor gap (46). Subsequently, a high voltage low turns ratio transformer (T2) is used to supply a pre-plasma current signal to the ignitor gap at a predetermined time following the high voltage spark thereby ensuring that the ionized channel is developed to a more conductive state prior to introduction of the pre-plasma signal into the ignitor gap. Once the sustaining voltage for sustaining plasma flow through the channel has stabilized to a sufficiently low voltage, a high current main plasma signal is supplied to the ignitor gap (46) thereby expanding plasma flow in the area surrounding the ignitor gap (46) and providing a high quality ignition source for use in internal combustion engines.