Slide 72 of 123
Notes:
The current waveform from an EDIS multi-strike firing event is shown in our
photo. Ignition current waveforms are captured by attaching a low amp current
probe to a lab scope and clamping it around the primary circuit wire.
The current waveform is different from the voltage waveform shown on the previous page. We can see the current build in the coil primary winding each time the module turns on. The angled appearance on the left side of each current hump illustrates how current builds gradually in the primary, to a peak current, limited by the module
The vertical, downward lines to the right of each hump indicate that the module has turned off the coil primary, inducing a spark into the secondary circuit. Each of the four events energizes and then fires the coil to produce a multiple spark firing event.
Note: This waveform was captured from a single coil driver wire at the ignition
coil connector.
