How Do Diesel Engines Work?

The basic difference between a diesel engine and a gasoline engine is that in a diesel engine, the fuel is sprayed into the combustion chambers through fuel injector nozzles just when the air in each chamber has been placed under such great pressure that it’s hot enough to ignite the fuel spontaneously.

Following is a step-by-step view of what happens when you start up a diesel-powered vehicle

You turn the key in the ignition.

Then you wait until the engine builds up enough…