What technical mechanism defines the Diesel engine's ignition process, differentiating it from gasoline engines?

Answer

It relies on the physics of extreme compression heating the air.

The critical distinction of the Diesel engine is that it achieves ignition without a spark plug. Air inside the cylinder is compressed so intensely that its temperature rises significantly, allowing the injected fuel to spontaneously ignite.

What technical mechanism defines the Diesel engine's ignition process, differentiating it from gasoline engines?
inventiontechnologyengineimpactRudolf Diesel