What happens near the end of the compression stroke on a cpmpression ignition engine?

Near the end of the compression stroke in a compression ignition engine, the piston reaches the top dead center (TDC), and the air within the cylinder is at a high temperature and pressure. At this point, fuel is injected into the highly compressed and heated air, causing it to ignite spontaneously due to the high temperature. This ignition leads to a rapid increase in pressure, driving the piston down during the power stroke.