What is phases of ignition in diesel engine?

The phases of ignition in a diesel engine include the following stages: first, air is compressed to a high temperature and pressure during the compression stroke. Next, diesel fuel is injected into the hot compressed air, leading to a rapid increase in temperature due to the fuel's auto-ignition properties. This results in combustion, which pushes the piston down during the power stroke. The entire process is characterized by a delay period known as ignition delay, which is the time between fuel injection and the start of combustion.