pointless ignition schematic
I couldn't see, if the circuit has been intended as real design or a principle schematic only. So I just wanted to point to some details, that seemed incorrect to me.
I was referring to a usual standard circuit instead, that is using a 12V supply and operates the ignition coil in flyback mode. This is equivalent to a traditional mechanical ignition timers operation. On contact opening, a flyback voltage of several 100 V is present at the switch, without a high voltage supply.
There are also circuits, that operate the ignition coil in forward mode from a high voltage supply. They are supposed to give a stronger ignition spark. I'm not aware of their usage in recent cars, I know that they had a high time in the 70th and 80th. I understand that the MSD system is of this type.
However, the gate drive isn't operational in the new cicrcuit to my opinion. The gate voltage has to be referenced to the IGBT emitter and keep an alowed +/-15 range to avoid IGBT damage. You circuit immediately destroys the optocoupler and the IGBT. Furthermore, an IGBT gate should be controlled by a low impedance driver for suitable switching performance.