Presumably my 2014 Fusion Hybrid is the equivalent mechanism. Very interesting and informative video linked there, thanks. I had read some info elsewhere but seeing the components operate clarifies the system much better. Surprised me that the engine does not directly drive the wheels. Will have to show it to my dad.
Driving the Fusion was a new experience for a while but now I don't notice the differences so much ... although it still catches my attention momentarily if, for example, I'm stopped at a traffic light or Whataburger drive-through or etc. and the engine comes on to charge the HV batteries for the air conditioning running or whatever. Conversely, I drove my dad's pick-up a couple days ago ... and the engine started immediately when I turned the key which momentarily startled me, LOL.