The piezo generates a tiny pulse ...
Tiny doesn’t matter, electrons are tiny, just integrate the pulse and what do you get? Tiny is just a distraction. Still the wave propagates.
of electricity from the energy used to compress it; in order to generate any more electricity, it must next be permitted to expand so that it can be compressed again.
And the word for compression and expansion over and over again is… wave. See the exaggerated wave in the picture above? The wave propagates through the medium of the pavement, with the speed of the vehicle. It isn’t stopped by the rolling resistance, the air resistance, the cruddy old engine, the clogged fuel injectors, nor the snow, nor the rain, nor the heat or cold, not even as it crests and troughs the pavement, not even as it propagates through the piezo. Still the wave propagates.
But compressing a substance requires work—energy.
True, but does propagating a wave? Yes, and still waves do propagate. The forces of weight and the force of the speed combine to supply the wave.
Hence, the energy coming from the piezo is actually coming from the weight of the car compressing it…
It creates an extremely shallow dimple in the road.
You are missing a force, the one that comes from the speed of the car, the two force model is more accurate than the one force model. Dimples have the ups and downs. The wave propagates there is a constant uninterrupted crest and trough, the wave model is more accurate than the hill model.
It must then climb out of that dimple—like climbing a hill. The energy required to climb out of the dimple will always be greater than the energy generated by the piezo (Second Thermo).
There is a rebound force from the expanding pavement/piezo that helps the tire up the hill, plus the energy gained while descending into the dimple, plus some gasoline, and I think that we can make it! Again, still the wave does propagate, so I’m not worried about all that because we know that the wave does propagate, therefore it overcomes all that, with or without a peizo.
Hence, all the energy coming out of the piezo is stolen from the car.
Don’t you remember all that gravity talk at the beginning of your message, Chris? You were solely focused on one force, weight, and now you’ve suddenly switched over to the force from the speed of the wave. That switch from one force to the other wasn’t explained.
And still the wave propagates, through either pavement or piezo, by the combination of gravity and speed. I know you skeptics want to stop the wave, but no-one has been able to do it yet. You skeptics do not want to believe it, but the idea has merit. Maybe in the future, pavement that recovers some wasted energy, some tall flaps beside the highway that the air waves from the cars flap out and in recovering waste energy… expensive but maybe.