Just seen this on YouTube.
https://youtu.be/LYQ2PiX_Z9o
It’s ironic the millions that must have been spent over the decades designing and manufacturing complicated and expensive electro mechanical car transmissions when the answer was staring them in the face.
It’s a proven concept of course using ICE to power electric motors and has been used in such things as Submarines and Loco’s etc. I suspect it’s used in more plant and equipment than most realise.