Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

Diesel engines have a fuel injecter will be. The compression ratio of diesel engines is 15:1 to 22:1. It has high pressure. At end of compression stroke, the fuel may be injected.

In diesel engines, fuel is atomized and mixed with air inside the cylinder through fuel injectors, and ignition takes place only by the compression of the air-fuel mixture in the compression stroke. Whereas in petrol engine (spark ignition engines), ignition takes place by spark plugs. So in diesel engines, Due to compression high pressure and temperature increases and the mixture ignites for the power stroke. Hence diesel engines are also known as compression engines.

Yes, That is right, how an ignition is taking place because of compression? Explain please.