COP Ignition Development

I just started working on a coil on plug, or coil near plug ignition system. It will use a modified distributor for timing reference using opto vane sensor and shutter wheel. The sensing method is an improvement compared to a Mopar electronic distributor. I have used an optical system for 12 years in several cars without a problem.

I am presently evaluating the ignition coils. The coils can multi strike at lower RPM, due to the short charge time.

The first picture is the shutter wheel, it will be modified for a sync signal.

The second picture is my 4 cylinder distributor using two optical sensors for a direct fire ignition.

The last picture is my coil test setup. The micro that controls the ignition is at the end of the heatsink under the scope probes. The notebook communicates via USB, to the micro, for setting coil charge duration, spark frequency and counts.

The scope shows the coil current ramp to 8.5A in yellow, the lower blue trace is the ignition primary voltage. The heat sink is for the coil driver with current limit.