So this is how it all works…
We’ve all seen, read about, and heard how engines work. The cylinder goes up and down while the valves open and close, shooting in a mixture of air/fuel, and expelling the exhaust gasses. Four-stroke engines are the way of the world today, and this is what it all looks like.
So, YouTube user, Warped Perception, took a Briggs and Stratton engine and fabricated a glass head so that the entire combustion process could be captured on video using a slow-motion 4K camera.
For this video, gasoline, isopropyl alcohol, and acetylene were used in the engine to demonstrate each of the four strokes: intake, compression, power, and exhaust. It’s something that you don’t get a chance to see due to the fact that cylinder heads are made from metal and the process happens so fast that we can’t comprehend it.
Source: Warped Perception YouTube