Really interesting video here
https://www.theverge.com/2020/4/6/21209370/tesla-ventilator-coronavirus-cov...
The key to the block diagram is Orange - Tesla vehicle components, Blue - medical components, Grey - other components.
Looks a lot more polished than the submarine... As a few poster have noted before there's a lot of commonality between parts used in a modern car and a ventilator.
I really like the display of a recent, averaged waveform in grey with the current waveform phase-aligned to it and overdrawn - immediate feedback for someone adjusting tube placement or patient position.
