Today was the first test of the engine with the control unit and it worked! Albeit only for a short time and a bit roughly (only had about 10 minutes to test). Initially I just needed to check that the ECU was triggering the ignition and fuel injection, and find a roughly suitable ignition angle.
Turns out that it will start with an ignition angle of about 33 degrees before Top Dead Centre (TDC). Cranking speed with the pull chord is around 300 RPM.
I now need to make a few modifications to the software from observations I’ve made today:
- Add a way to stop the engine by stopping ignition and fuelling