Difference between internal combustion engines and external combustion engines?

Answer 1

In an Internal Combustion Engine, the fuel is burned in the cylinder or vessel. Eg. Diesel or Petrol engine used in Cars.

• Internal engine has its energy ignited in the cylinder, like 99.9% of engines today.

In an External Combustion Engine, the internal working fuel is not burned. 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.

• An external combustion example is a steam engine where the heating process is done in an boiler out side the engine.

Answer 2

Internal combustion engines burn fuel inside the engine to generate power, while external combustion engines burn fuel outside the engine and use the resulting heat to create power, such as in steam engines. Internal combustion engines are more common in vehicles due to their compact size and efficiency, while external combustion engines are used in specific applications like power plants and some marine propulsion systems.

Answer 3

in internal combustion engine combustion happens internally in cylinder and in external combustion engine combustion happens externally in boiler