What is the difference between the Internal combustion and the External combustion engine?

What is the difference between the Internal combustion and the External combustion engine?
In an Internal Combustion Engine, the Fuel is burnt in the cylinder or vessel eg. Diesel or Petrol engine used in Cars.
Gasoline engines, Wankel engines, diesels, gas turbines are all examples of internal combustion.


In an External Combustion Engine, the internal working fuel is not burnt. Here the fluid is being heated from an external source. The fuel is heated and expanded through the internal mechanism of the engine resulting in work. eg. Steam Turbine, Steam engine Trains.