What is an internal combustion engine?

What is an internal combustion engine?

In 1885, two Germans, Gottlieb Daimler and Karl Benz designed an engine that burned a petroleum fuel and used toe resulting power to generate motion. This was the internal-combustion engine, a power source that eventually replaced the steam engine as a method for running vehicles.

The internal-combustion engine is used for many other devices too. This engine flies aero planes, run boats, and many other devices too.