
thumb|right|225px|An animation showing the four stages of a Four-stroke engine|four-stroke gasoline-fueled internal combustion cycle with electrical ignition source: thumb|right|450px|Diagram of a jet engine. Jet engines use the [[heat of combustion to generate a high-velocity exhaust as a form of reaction engine. Mechanical energy to power the aircraft's electrical and hydraulic systems can be taken from the turbine shaft, but thrust is produced by expelled exhaust gas.]]
An engine is a machine that converts fuel into mechanical energy through combustion, with different designs serving different purposes—such as four-stroke gasoline engines in vehicles or jet engines in aircraft. Engines matter because they power much of modern transportation and machinery, enabling cars, planes, and countless other devices to function.
AI-generated from the Wikipedia summary — may contain errors.
thumb|right|225px|An animation showing the four stages of a Four-stroke engine|four-stroke gasoline-fueled internal combustion cycle with electrical ignition source: thumb|right|450px|Diagram of a jet engine. Jet engines use the [[heat of combustion to generate a high-velocity exhaust as a form of reaction engine. Mechanical energy to power the aircraft's electrical and hydraulic systems can be taken from the turbine shaft, but thrust is produced by expelled exhaust gas.]]
An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).