COP Ignition Development

Bill,

The design includes MAP sensor, engine temperature, and battery voltage measurement. The Arduino Nano has a USB connection for use with user interface and code flash.

The outputs will include tach out, to drive conventional single coil tach.

The sync detection via tab wheel has worked well on my 2.2 turbo application with EMS2. The OEM turbo tab wheel with window, is similar, but with Hall sensor. Going to opto costs less, more available and reliable. The change for V8, or 6 is one number in the code. I think I spotted 6 tab trigger wheel to use, but I no longer have a /6 cylinder car. Straight nose coil ends are available, they should work great on slant 6.

I have experience in the hardware and code from my successful EMS2 engine management system. This is a port, to a $3 micro, with less features, but not required, since no EFI involved. The other difference is more coil drive signals. I am still debating if I should overlap coil dwell, not doing that greatly simplifies code design. Even without overlap, the system is capable of more spark energy than conventional single coil w/rotor system.

The ignition coil has a magnet biased core. The bias, increases the inductance, resulting in more spark energy. The dwell time is shorter compared to single coil system. Multi-strike is available at low and medium RPM. I am developing those functions at the moment. I hope to post example in a few days.

I hope to make this design open, so others can build. Perhaps you can assist with the few details, special for the /6 use.