Engine (disambiguation)

An engine is a device that converts energy in one form into mechanical energy.

Engine may also refer to:

In thermodynamics

Heat engine, a physical or theoretical device that converts thermal energy to mechanical output
- Reciprocating engine, a heat engine that uses one or more pistons
Internal combustion engine, an engine in which the combustion of fuel and an oxidizer occurs in a confined space
- Diesel engine
- Wankel engine, a type of internal combustion engine
- Pulse jet engine, an internal combustion engine wherein the combustion occurs in pulses
External combustion engine, an engine where an internal fluid is heated through the engine wall or a heat exchanger
- Steam engine, an external combustion engine that converts steam expansion into mechanical work
Carnot heat engine, a hypothetical engine that operates on the reversible Carnot cycle
Stirling engine, a closed-cycle regenerative hot-air engine

Locomotive, the car of a train that carries the actual engine(s) and pulls/pushes the rest of the train
- Electric locomotive, a locomotive which carries the electric motors of a train

Database engine, software that manipulates database contents internally
Engine (computer science), a construct providing timed preemption
Software engine, an input/output system where the output is of a different order than the input, such as the conversion of HTML to a rendered page
Search engine, an information-retrieval system designed to find information on a computer system
Game engine, the core software component of a computer or video game
Layout engine, software that formats web content for display on a screen
Rendering engine, software or hardware which converts specifications for images into pixels
Ray-tracing engine, software which renders a scene by tracing simulated rays of light
Polymorphic engine or mutation engine, an early conceptual or mechanical calculating device
Difference engine, a mechanical calculator designed to tabulate polynomial functions
Analytical Engine, a concept for a computer, designed by Charles Babbage
Chess engine, a computer program that analyses chess positions and makes decisions on the best chess moves

The Engine, a fictional device described in Gulliver's Travels
Engines (children's book), a 1959 science book for children by L. Sprague de Camp

Engine, a giant living machine in the Japanese Super Sentai TV series Engine Sentai Go-onger
Engine (TV series), a Japanese television drama starring Takuya Kimura