ST Microelectronics created an application note AN819 in 1995:
It is short but very informative with a lot of diagrams. So it is highly recommended for reading when you are interested in CDI technology.
There are a few documents about ignition knowledge published by ST.
CAPACITIVE DISCHARGE PRINCIPLE: dsa0030910.pdf
CAR IGNITION WITH IGBTS (1999): cd00003911.pdf
High voltage ignition coil driver power integrated circuit: VB525SP-E (2010): cd00286281.pdf
High voltage ignition coil driver power integrated circuit: VB526SP-E (2010): cd00286429.pdf