What Is an Internal Combustion Engine? | HowStuffWorks
https://science.howstuffworks.com/innovation/inventions/internal-combustion-engine.htm
webJul 18, 2023 · An internal combustion engine is a type of heat engine that is widely used in various applications, particularly in transportation. This engine acts as the primary power source for automobiles, motorcycles, airplanes, boats, and many other machines.
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