- Two-stroke engines: These engines complete a power cycle in two strokes of the piston, and are often used in small engines such as those found in motorcycles, chainsaws, and weed trimmers.
- Four-stroke engines: These engines complete a power cycle in four strokes of the piston, and are used in a wide variety of applications including cars, trucks, and generators.
- Diesel engines: These engines are a type of internal combustion engine that uses compression ignition to burn fuel, and are often used in heavy-duty applications such as trucks, buses, and ships.
- Gasoline engines: These engines are a type of internal combustion engine that uses spark ignition to burn fuel, and are often used in cars, motorcycles, and lawnmowers.
- Electric motors: These motors use electricity to create motion, and are often used in electric vehicles, appliances, and industrial machinery.
- Steam engines: These engines use steam to create motion, and were once widely used in locomotives, ships, and factories, but are now largely obsolete.
- Gas turbines: These engines use the expansion of hot gases to create motion, and are often used in aircraft, power plants, and marine vessels.
- Rocket engines: These engines use the expulsion of hot gases to create thrust, and are used in rockets and spacecraft.
